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1 rev. 7/10/03 sp522 multi?ode serial transceivers ?copyright 2003 sipex corporation the sp522/524 is a monolithic device that supports three serial interface standards for wide area network connectivity. the sp522/524 is ideally suited for multi-protocol designs that are cost and space sensitive. the sp522/524 is fabricated using a low power bicmos process technology. two (2) drivers and two (2) receivers for the sp522 can be configured via software for any of the above interface modes at any time. the sp524 offers two (2) additional drivers and two (2) additional receivers. sp522 ?2 drivers and 2 receivers sp524 ?4 drivers and 4 receivers driver and receiver tri-state control low-cost wan solution loopback function for diagnostics software selectable interface modes: -rs-232 (v.28), rs-423 (v.10) -rs-422 (v.11, x.21), rs-485 description sp522/sp524 low-cost programmable multi-protocol transceivers t1in 24 t1 t1outa 22 17 t2in 25 t2 18 r1ina 44 r1out 43 r2out t1outb t2outa t2outb r1inb r2ina r2inb loo pback p a ths v dd v dd 10 f 28 v ss 10 f +5v v cc 10 f 14 ent1 ent2 enr1 enr2 sp524 dp0 dp1 latch_en loopbck decoder logic 40 36 35 39 20 3 4 5 6 31 32 30 23 t3in 26 t3 t3outa 16 11 t4in 27 t4 13 r3ina 42 r3out 41 r4out t3outb t4outa t4outb r3inb r4ina r4inb lo o pba c k p a ths ent3 ent4 enr3 enr4 38 34 33 37 15 7 8 9 10 gnd 12 121 2 19 v ss 29 + v cc v cc gnd gnd r2 r1 r3 r4 in5819 t1in 10 t1 t1outa 11 16 gnd 14 t2in 9 t2 15 r1ina 1 r1out 24 r2out t1outb t2outa t2outb r1inb r2ina r2inb lo o p b a c k p a t h s v dd v dd 10 f 21 v ss v ss 10 f 22 +5v v cc 10 f 13 + ent1 ent2 enr1 enr2 sp522 dp0 dp1 latch_en loopbck decoder logic 5 6 4 3 12 18 17 20 19 8 7 2 23 r1 r2 1n5819
2 rev. 7/10/03 sp522 multi?ode serial transceivers ?copyright 2003 sipex corporation specifications typical @ 25 c and nominal supply voltages unless otherwise noted. min. typ. max. units conditions logic inputs v il 0.8 volts v ih 2.0 volts logic outputs v ol 0.4 volts i out = ?.2ma v oh 2.4 volts i out = 1.0ma rs422 driver ttl input levels v il 0 0.8 volts v ih 2.0 volts outputs differential output +2.0 +5.0 volts r=50 ? ; see figure 1 open circuit voltage,v o +6.0 volts balance +0.4 volts |v t | ? |v t | offset +3.0 volts short circuit current +150 ma v out = 0v power off current +100 av cc = 0v, v out = +0.25v transition time 40 ns rise/fall time, 10%-90% max. transmission rate 10 mbps r l =100 ? propagation delay t a = +25 c t phl 90 150 ns r diff =100 ? , figures 3 & 5 t plh 90 150 ns r diff =100 ? , figures 3 & 5 rs422 receiver ttl output levels v ol 0.4 volts v oh 2.4 volts input high threshold +0.3 +6.0 volts (a)-(b) low threshold -6.0 -0.3 volts (a)-(b) common mode range -7.0 +7.0 volts high input current refer to rec. input graph low input current refer to rec. input graph receiver sensitivity +0.3 volts v cm = +7v to -7v input impedance 4 k ? max. transmission rate 10 mbps propagation delay t a = +25 c t phl 110 175 ns figures 3 & 7 t plh 110 175 ns figures 3 & 7 rs485 driver ttl input levels v il 0.8 volts v ih 2.0 volts outputs differential output +1.5 +5.0 volts r=27 ? ; c l =50pf; see fig. 1 open circuit voltage,v o +6.0 volts balance +0.2 volts |v t | ? |v t | output current 28.0 ma r l =54 ? short circuit current +200 ma v out = ?v to +7v transition time 40 ns rise/fall time, 10%-90% max. transmission rate 10 mbps r l =54 ? propagation delay figures 3 & 5; t a = +25 c t phl 100 150 ns r diff =54 ? , c rl = 50pf t plh 100 150 ns r diff =54 ? , c rl = 50pf
3 rev. 7/10/03 sp522 multi?ode serial transceivers ?copyright 2003 sipex corporation specifications typical @ 25 c and nominal supply voltages unless otherwise noted. min. typ. max. units conditions rs485 receiver ttl output levels v ol 0.4 volts v oh 2.4 volts input common mode range -7.0 +12.0 volts high input current refer to rec. input graph low input current refer to rec. input graph receiver sensitivity 0.1 volts v cm = +12v to -7v input impedance 12 k ? v cm = +12v to -7v max. transmission rate 10 mbps propagation delay t a = +25 c t phl 110 175 ns figures 3 & 7 t plh 110 175 ns figures 3 & 7 rs232 driver ttl input level v il 0.8 volts v ih 2.0 volts outputs high level output +5.0 +15 volts r l =3k ? , v in =0.8v low level output -15.0 -5.0 volts r l =3k ? , v in =2.0v open circuit voltage -15 +15 volts short circuit current + 100 ma v out = 0v power off impedance 300 ? v cc = 0v, v out = 2.0v slew rate 30 v/ sr l =3k ? , c l =50pf, between +3v to ?v transition time 1.5 sr l =3k ? , c l =2500pf max. transmission rate 120 kbps r l =3k ? , c l =2500pf propagation delay t a = +25 c t phl 28 sr l =3k ? t plh 28 sr l =3k ? rs232 receiver ttl output levels v ol 0.4 volts v oh 2.4 volts input high threshold 1.7 3.0 volts low threshold 0.8 1.2 volts receiver open circuit bias +2.0 volts input impedance 3 5 7 k ? max. transmission rate 120 kbps propagation delay t a = +25 c t phl 0.2 1 s t plh 0.2 1 s rs423 driver ttl input levels v il 0.8 volts v ih 2.0 volts output v dd = +5v, v ss = ?v high level output +3.6 +6.0 volts r l =450 ? , v t = 0.9*v oc low level output -6.0 -3.6 volts r l =450 ? , v t = 0.9*v oc open circuit voltage +4.0 +6.0 volts short circuit current + 150 ma v out = 0v
4 rev. 7/10/03 sp522 multi?ode serial transceivers ?copyright 2003 sipex corporation +3.25ma ?.25ma +10v +3v ?v ?0v maximum input current v ersus voltage v .10 receiver +1.0ma ?.6ma +12v +6v ?v ?v 1 unit load maximum input current versus voltage rs485 receiver +3.25ma ?.25ma +10v +3v ?v ?0v maximum input current ve rsus voltage v. 11 receiver receiver input graphs specifications (continued) typical @ 25 c and nominal supply voltages unless otherwise noted. min. typ. max. units conditions rs-423 driver power off current 100 av cc = 0v, v out = + 0.25v transition time 1.0 s rise/fall time, 10-90% max. transmission rate 120 kbps r l =450 ? propagation delay t a = +25 c t phl 28 sr l =450 ? t plh 28 sr l =450 ? rs423 receiver ttl output levels v ol 0 0.4 volts v oh 2.4 volts input high threshold +0.3 +7.0 volts low threshold -7.0 -0.3 volts common mode range -7.0 +7.0 volts high input current refer to rec. input graph low input current refer to rec. input graph receiver sensitivity +0.3 volts v cm = +7v to -7v input impedance 4 k ? v in = +10v to -10v max. transmission rate 120 kbps propagation delay t a = +25 c t phl 0.5 1 s t plh 0.5 1 s power requirements v cc +4.75 +5.0 +5.25 volts v dd +9.5 +10.0 +10.5 volts v ss -9.5 -10.0 -10.5 volts i cc 4mav cc = +5v; dp0=dp1=0v i dd 10 ma v dd = +10v; dp0=dp1=0v i ss 10 ma v ss = ?0v; dp0=dp1=0v environmental and mechanical operating temperature range 0 +70 c storage temperature range -65 +150 c package 24-pin soic, 24-pin ssop, 44?in qfp
5 rev. 7/10/03 sp522 multi?ode serial transceivers ?copyright 2003 sipex corporation absolute maximum ratings these are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. exposure to absolute maximum rating conditions for extended periods of time may affect reliability. v cc ............................................................................+7v v dd ........................................................................+12v v ss ..........................................................................?2v input voltages logic...............................-0.5v to (v cc +0.5v) drivers............................-0.5v to (v cc +0.5v) receivers.......................... 30v@ 100ma outputs voltages logic................................-0.5v to (v cc +0.5v) drivers................................................ + 15v receivers........................-0.5v to (v cc +0.5v) storage temperature..........................-65?c to +150?c power dissipation.........................................2000mw other ac characteristics (typical @ 25 c and nominal supply voltages unless otherwise noted) parameter min. typ. max. units conditions driver delay time from enable mode to tri?tate mode single?nded mode (rs-232, rs-423) t pzl ; enable to output low 600 ns 3k ? pull?p to output t pzh ; enable to output high 300 ns 3k ? pull?own to output t plz ; disable from output low 300 ns 5v to input t phz ; disable from output high 900 ns gnd to input differential mode (rs-422, rs-485) t pzl ; enable to output low 100 ns c l = 100pf, fig. 4 & 6; s 1 closed t pzh ; enable to output high 120 ns c l = 100pf, fig. 4 & 6; s 2 closed t plz ; disable from output low 100 ns c l = 15pf, fig. 4 & 6; s 1 closed t phz ; disable from output high 160 ns c l = 15pf, fig. 4 & 6; s 2 closed receiver delay time from enable mode to tri?tate mode single?nded mode (rs-232, rs-423) t pzl ; enable to output low 125 ns 3k ? pull?p to output t pzh ; enable to output high 120 ns 3k ? pull?own to output t plz ; disable from output low 90 ns 5v to input t phz ; disable from output high 90 ns gnd to input differential mode (rs-422, rs-485) t pzl ; enable to output low 125 ns c rl = 15pf, fig. 2 & 8; s 1 closed t pzh ; enable to output high 120 ns c rl = 15pf, fig. 2 & 8; s 2 closed t plz ; disable from output low 90 ns c rl = 15pf, fig. 2 & 8; s 1 closed t phz ; disable from output high 90 ns c rl = 15pf, fig. 2 & 8; s 2 closed
6 rev. 7/10/03 sp522 multi?ode serial transceivers ?copyright 2003 sipex corporation a b r r v od v oc figure 1. driver dc test load circuit 1k 1k c rl receiver output s 1 s 2 test point v cc figure 2. receiver timing test load circuit c l1 15pf ro a b a b di de 3v c l2 r diff figure 3. driver/receiver timing test circuit 500 c l output under test s 1 s 2 v cc figure 4. driver timing test load #2 circuit figure 5. driver propagation delays +3v 0v driver input b a driver output v o + differential output v a ?v b 0v v o t skew t skew 1.5v 1.5v t plh t r t f f = 1mhz; t r < 10ns; t f < 10ns v o 1/2v o 1/2v o t phl
7 rev. 7/10/03 sp522 multi?ode serial transceivers ?copyright 2003 sipex corporation +3v 0v re 5v r 0v 1.5v 1.5v t zl t zh f = 1mhz; t r < 10ns; t f < 10ns r 1.5v 1.5v t lz t hz 0.5v 0.5v output normally low output normally high v il v ih figure 8. receiver enable and disable times figure 7. receiver propagation delays +3v 0v de 5v v ol a, b 0v 1.5v 1.5v t zl t zh f = 1mhz; t r < 10ns; t f < 10ns v oh a, b 2.3v 2.3v t lz t hz 0.5v 0.5v output normally low output normally high figure 6. driver enable and disable times v oh v ol receiver out 1.5v 1.5v t phl f = 1mhz; t r 10ns; t f 10ns output v od2 + v od2 a ?b 0v 0v t plh input
8 rev. 7/10/03 sp522 multi?ode serial transceivers ?copyright 2003 sipex corporation pinout (24-pin soic & ssop) pinout (44-pin qfp) sp524 33 32 31 30 29 28 27 26 25 24 23 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 44 43 42 41 40 39 38 37 36 35 34 gnd vcc r1ina r1inb r2ina r2inb r3ina r3inb r4ina r4inb t4outb gnd t4outa vcc t3outb t3outa t2outb t2outa vcc t1outb gnd t1outa ent4 dp1 dp0 latch_en vss vdd tin4 tin3 tin2 tin1 loopbck r1out r2out r3out r4out enr1 enr2 enr3 enr4 ent1 ent2 ent3 r1out latch_en enr2 ent2 enr1 ent1 dp1 dp0 t2in t1in t1outa t1outb sp522 r2out loopbck vss vdd r2ina r2inb r1ina r1inb t2outb t2outa gnd vcc 24 23 22 21 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 9 10 11 12
9 rev. 7/10/03 sp522 multi?ode serial transceivers ?copyright 2003 sipex corporation features the sp522 and sp524 is a highly integrated serial transceiver that offers programmability between interface modes through software con- trol. the sp522 and sp524 offers the hardware interface modes for rs-232 (v.28), rs-422a (v.11), rs-423 (v.10), and rs-485. the inter- face mode selection is done via two control pins. the sp522 contains two (2) independent drivers and two (2) independent receivers. the sp524 is basically two sp522 functions on one silicon, thus having four (4) drivers and four (4) receivers. the sp522/sp524 is ideally suited for low-cost wide area network connectivity and other multi- protocol applications. based on our previous multi-mode sp500 family, sipex has allocated specific transceiver cells or "building blocks" from the sp503 and created the sp522 . the "building block" concept is that these small transceiver cells can be packaged to offer a simple low-cost solution to networking appli- cations that need only two to four interface modes. the sp522 can be connected in series to build multiple channels needed for the spe- cific application. sipex has conveniently doubled the sp522 transceiver cell into the sp524 on a single silicon. for example in a 8- channel application requiring eight transceiv- ers, the design can be implemented using two sp524 devices. the sp522 and sp524 can also be implemented in series with our sp500 fam- ily. an application needing 9-channels can use the sp504 containing seven (7) transceivers with the sp522 . theory of operation the sp522 and sp524 are simply made up of the drivers, receivers, and decoder. the devices operate on three (3) power supplies; v cc at +5v, v dd at +10v , and v ss at ?0v. each of these circuit blocks are described in more detail below. drivers the sp522 has two (2) enhanced independent drivers. control for the mode selection is done via a two?it control word into dp0 and dp1. the drivers are pre-arranged such that for each mode of operation, the relative position and functionality of the drivers are set up to accom- modate the selected interface mode. as the mode of the drivers is changed, the electrical characteristics will change to support the required signal levels. the mode of each driver in the different interface modes that can be selected is shown in figures 10 to 13 . there are three basic types of driver circuits rs-232, rs-423, and rs-485. the rs-232 drivers output single?nded signals with a minimum of +5v (with 3k ? and 2500pf loading), and can operate up to 120kbps. the rs-232 drivers are used in rs-232 mode for all signals, and also in v.35 mode where they are used as the control line signals such as dtr and rts. the rs-423 drivers are also single?nded signals with a minimum voltage output of +3.6v (with 450 ? loading) and can operate up to 120kbps. open circuit v ol and v oh measurements are +4.0v to +6.0v when supplying +5v to v dd and v ss . the rs-423 drivers can be used in rs-449, eia-530, eia- 530a and v.36 applications as category ii signals from each of their corresponding specifications. the third type of driver produces a differential signal that can maintain rs-485, +1.5v differ- ential output levels with a worst case load of 54 ? . the signal levels and drive capability of the rs-485 drivers allow the drivers to also support rs-422 (v.11) requirements of +2v differential output levels with 100 ? loads. the rs-422 drivers can be used in rs-449, eia-530, eia-530a and v.36 applications as category i signals which are used for clock and data. the drivers also have separate enable pins which makes the sp522/sp524 helpful for half-duplex applications. the enable pins will tri-state the drivers when the ent1 and ent2 pins are at a logic low ("0"). for the sp524 , ent3 and ent4 are used for the two additional drivers. during tri-stated conditions, the driver outputs will be at a high impedance state.
10 rev. 7/10/03 sp522 multi?ode serial transceivers ?copyright 2003 sipex corporation unused driver inputs can be left floating; pull up resistors to +5v is internally connected on the inputs so that the output is at a logic low ("0"). for differential drivers, the non-inverting output will be at a logic high ("1"). receivers the sp522 has two (2) independent receivers which can be programmed for the different interface modes. control for the mode selection is done by dp0 and dp1. like the drivers, the receivers are pre-arranged for the specific requirements of the interface. as the operating mode of the receivers is changed, the electrical characteristics will change to support the required interface. figures 10 to 13 show the mode of each receiver in the different interface modes that can be selected. there are three basic types of receiver circuits ?rs-232, rs-423, and rs-485. the rs-232 receiver is a single?nded input with a threshold of 0.8v to 3.0v. the rs-232 receiver has an operating voltage range of +15v and can receive signals up to 120kbps. the input sensitivity complies with eia-rs-232 and v.28 at +3v to -3v. the input impedance is 3k ? to 7k ? . the rs-423 receivers are also single?nded but have an input threshold as low as +300mv. the input impedance is guaranteed to be greater than 4k ? , with an operating voltage range of +7v. the rs-423 receivers can operate up to 120kbps. rs423 receivers can be used in rs-449, eia530, eia-530a and v.36 applications as category ii signals as indicated by their corresponding specifications. the third type of receiver is a differential which supports rs-485. the rs-485 receiver has an input impedance of 15k ? and a differential threshold of +300mv. since the characteristics of an rs-422 (v.11) receiver are actually subsets of rs-485, the receivers for rs-422 requirements are covered by the rs-485 receivers. rs-422 receivers are used in applications for rs-449, eia530, eia-530a and v.36 as category i signals for receiving clock, data, and some control line signals. the differential receivers can receive data up to 10mbps. all receivers include a fail-safe feature that output a known logic state when the receiver inputs are unconnected. for single-ended rs-232 receivers, there are internal 5k ? pull- down resistors on the inputs which produces a logic high ("1") at the receiver outputs. the single-ended rs-423 receivers produce a logic low ("0") on the output when the inputs are open. this is due to a pull-up device connected to the input. the differential receivers have the same internal pull-up device on the non-inverting input which produces a logic high ("1") at the receiver output. the receivers also have enable pins which allow for convenient half-duplex configurations. the receivers are tri-stated when the enr1 and enr2 pins are at a logic high ("1"). for the sp524 , enr3 and enr4 are used for the additional two receivers. in addition to the separate enable lines on each transceiver, there is a latch enable pin, latch_en, which is used for enabling and disabling the decoder control inputs (dp0, dp1) and transceiver enable pins. this pin will default to a logic high ("1") if not being used. loopback the sp522 and sp524 contain a loopback fea- ture that allows the driver outputs to "loopback" to the receiver inputs for diagnostic testing in the application. the loopback function is activated when the loopbck pin is low. when in loopback mode, the driver outputs are tri-stated and the receiver inputs are deactivated. the receiver input impedance while in loopback will be a minimum of 12k ? . the loopback function can be initiated during any mode of operation, rs-232, rs-423 or rs-422. the travel path of the transceivers in loopback is shown on figure 9 . the loopback function overrides the separate enable pins for the drivers or receivers. when loopbck is at a logic low ("0"), the device will be configured in loopback regardless whether the transceiver is enabled or disabled. if the loopback function is not required, the loopbck pin will default to a logic high ("1") state.
11 rev. 7/10/03 sp522 multi?ode serial transceivers ?copyright 2003 sipex corporation figure 9. typical operating circuit, sp522 and sp524 t1in 24 t1 t1outa 22 17 t2in 25 t2 18 r1ina 44 r1out 43 r2out t1outb t2outa t2outb r1inb r2ina r2inb loopback p a ths v dd v dd 10 f 28 v ss 10 f +5v v cc 10 f 14 ent1 ent2 enr1 enr2 sp524 dp0 dp1 latch_en loopbck decoder logic 40 36 35 39 20 3 4 5 6 31 32 30 23 t3in 26 t3 t3outa 16 11 t4in 27 t4 13 r3ina 42 r3out 41 r4out t3outb t4outa t4outb r3inb r4ina r4inb loopback p a ths ent3 ent4 enr3 enr4 38 34 33 37 15 7 8 9 10 gnd 12 121 2 19 v ss 29 + v cc v cc gnd gnd r2 r1 r3 r4 in5819 t1in 10 t1 t1outa 11 16 gnd 14 t2in 9 t2 15 r1ina 1 r1out 24 r2out t1outb t2outa t2outb r1inb r2ina r2inb loopback p a ths v dd v dd 10 f 21 v ss v ss 10 f 22 +5v v cc 10 f 13 + ent1 ent2 enr1 enr2 sp522 dp0 dp1 latch_en loopbck decoder logic 5 6 4 3 12 18 17 20 19 8 7 2 23 r1 r2 1n5819
12 rev. 7/10/03 sp522 multi?ode serial transceivers ?copyright 2003 sipex corporation figure 10. mode diagram ?rs232 mode: rs232 driver receiver dp0 dp1 dp0 dp1 r1ina (18) 1 0 1 0 latch_en loopbck ent x enr x 1 1 1 0 receivers drivers r2ina (20) sp522 receivers drivers sp524 r2out (24) r1out (1) t1in (10) t1outa (11) t2outa (15) t2in (9) r1ina (3) r2ina (5) r2out (43) r1out (44) t1in (24) t1outa (22) t2outa (18) t2in (25) r3ina (7) r4ina (9) r4out (41) r3out (42) t3in (26) t3outa (16) t4outa (13) t4in (27)
13 rev. 7/10/03 sp522 multi?ode serial transceivers ?copyright 2003 sipex corporation figure 11. mode diagram ? rs423 mode: rs423 driver receiver dp0 dp1 dp0 dp1 r1ina (18) 1 1 1 1 latch_en loopbck ent x enr x 1 1 1 0 receivers drivers r2ina (20) sp522 receivers drivers sp524 r2out (24) r1out (1) t1in (10) t1outa (11) t2outa (15) t2in (9) r1ina (3) r2ina (5) r2out (43) r1out (44) t1in (24) t1outa (22) t2outa (18) t2in (25) r3ina (7) r4ina (9) r4out (41) r3out (42) t3in (26) t3outa (16) t4outa (13) t4in (27)
14 rev. 7/10/03 sp522 multi?ode serial transceivers ?copyright 2003 sipex corporation figure 12. mode diagram ?rs422/rs485 for the sp522 mode: rs422/485 driver receiver dp0 dp1 dp0 dp1 0 1 0 1 latch_en loopbck ent x enr x 1 1 1 0 receivers drivers sp522 r1ina (18) r1inb (17) r1out (1) t1in (10) t1outa (11) t1outb (12) r2ina (20) r2inb (19) r2out (24) t2in (9) t2outa (15) t2outb (16)
15 rev. 7/10/03 sp522 multi?ode serial transceivers ?copyright 2003 sipex corporation figure 13. mode diagram ? rs422/rs485 for the sp524 mode: rs422/485 driver receiver dp0 dp1 dp0 dp1 0 1 0 1 latch_en loopbck ent x enr x 1 1 1 0 receivers drivers sp524 r1ina (3) r1inb (4) r1out (44) t1in (24) t1outa (22) t1outb (20) r2ina (5) r2inb (6) r2out (43) t2in (25) t2outa (18) t2outb (17) r3ina (7) r3inb (8) r3out (42) t3in (26) t3outa (16) t3outb (15) r4ina (9) r4inb (10) r4out (41) t4in (27) t4outa (13) t4outb (11)
16 rev. 7/10/03 sp522 multi?ode serial transceivers ?copyright 2003 sipex corporation applications information dce-dte applications a serial port can be easily configured for dte and dce using multiple sp522 and/or sp524 parts. as shown on figure 14 , the transceivers are half-duplexed to provide convenient dce- dte capability. the driver outputs are con- nected to the receiver inputs with only one pair out to the serial port for each driver/receiver. when the driver is tri-stated by applying a logic low ("0") to ent, the receivers can be active to receive the appropriate input. the driver output during tri-state is high impedance, therefore will not degrade the signal levels of the receiver input signal. when the receiver is tri-stated by applying a logic ("1") to enr, the driver output is active to drive the appropriate signal without interference from the receiver. the receiver inputs are at least 12k ? to ground during tri-state. configuring additional multi-protocol transceivers serial ports usually can have two data signals (sd, rd), three clock signals (tt, st, rt), and at least eight control signals (cs, rs, etc.). eia-rs-449 contains twenty six signal types including for a db-37 connector. a db-37 serial port design may require thirteen drivers and fourteen receivers. although many applications do not use all these signals, some applications may need to support extra functions such as diagnostics. sipex's sp504 supports enough transceivers for the primary channels of data, clock and control signals. configuring ll, rl and tm may require two additional drivers and one receiver if designing for a dte (one driver and two receivers for a dce). the sp522 and sp524 is a convenient solution in a design that requires two extra single ended or differential transceivers. the sp504 and sp522 , shown in figure 15, can be programmed in various configurations. the sp504 is programmed for rs-449 mode. by connecting the decoder pins of the sp504 to the dp0 and dp1 pins accordingly, the sp522 is programmed in rs-423 mode. this adds two single ended transceivers to the application. for applications needing more than five rs-422 transceivers or more than three rs-423 transceivers, the sp504 can be programmed to rs-422 whereas a sp524 can be added and programmed to rs-423, thus creating seven rs-422 channels and four rs-423 channels. the sp504 and the sp522/ sp524 can be configured to custom fit the various serial port application needs. +5v only operation using the sp782 the sp522 and sp524 use external +10v or +5v voltage supplies for power to maintain the rs-232 and rs-423 voltage levels, respectively. however, if a low-cost +5v solution if pre- ferred, the sp522 and sp524 can be configured with the sp782 or sp784 programmable charge pump. the sipex patent-pending programmable charge pumps offer +10v or +5v outputs. the programmability is used for switching from rs-232 using the +10v outputs to rs-423 using the +5v outputs. the sp782 requires 0.1 f capacitors and the sp784 requires 10 f capacitors for the charge pump. please refer to the sp782 and sp784 data sheet for details on the program- mable charge pump. achieving +10v with +12v supplies since the sp522 and sp524 use external +10v supplies, systems that have +12v supplies must be regulated down to +10v. this can be simply configured by placing diodes in series with the v dd and v ss lines. the absolute maximum supply voltage is +12v. since most +12v power supplies have some voltage tolerances, usually +10%, any increase above the 12v maximum will damage the device. however, the +12v supply may be used providing that the maximum supply voltages do not exceed the rated absolute maximum v ss and v dd . sequencing of power supplies power supplies for the sp522 and sp524 must be sequenced. the recommended sequence is v cc first, v dd 50-80 sec later and v ss 100 to 1,000 sec after v dd . there are no sequencing requirements for the sp522 or sp524 when they are powered from either the sp782 or sp784 charge pump devices or from the v dd and v ss supply pins of the sp504 or sp505 charge pump powered devices. for further details, see the application note, v dd , v cc and v ss power supply sequencing.
17 rev. 7/10/03 sp522 multi?ode serial transceivers ?copyright 2003 sipex corporation figure 14. dte/dce application with the sp522 and sp524 +5v 2 v cc sp524 43 28 29 10 f 10 f 22 20 24 25 5 36 dp1 dp0 +10v 10 f + + + v dd v ss 32 31 1 ?0v 39 40 latch_en 30 loopbck gnd 41 7 26 27 42 37 38 +5v 13 v cc sp522 1 15 21 22 10 f 10 f 11 12 10 9 18 24 dp1 dp0 +10v 10 f + + + v dd v ss 7 8 14 ?0v 6 17 5 3 latch_en 2 loopbck gnd 14 19 44 3 4 18 17 35 6 16 8 15 13 11 33 34 9 10 23 12 21 gnd gnd 16 6 20 19 4
18 rev. 7/10/03 sp522 multi?ode serial transceivers ?copyright 2003 sipex corporation figure 15. adding extra channels using the sp522 and sp504 circuit circuit name circuit circuit mnemonic direction type sg signal ground -------------- sc send common to dce rc receive common from dce is terminal in service to dce ic incoming call from dce tr terminal ready to dce dm data mode from dce sd send data to dce rd receive data from dce tt terminal timing to dce st send timing from dce rt receive timing from dce rs request to send to dce cs clear to send from dce rr receiver ready from dce sq signal quality from dce ns new signal to dce sf select frequency to dce sr signal rate selector to dce si signal rate indicator from dce ssd secondary send data to dce srd secondary rd from dce srs secondary rs to dce scs secondary cs from dce srr secondary rr from dce ll local loopback to dce rl remote loopback to dce tm test mode from dce ss select standby to dce sb standby indicator from dce rs-449 interchange circuits table control common data timing control data control control control primary channel secondary channel v cc v dd 61 59 +5v sp504cf drivers txd 14 58 56 dtr 13 54 52 rts 16 63 65 txc 15 42 44 st 22 47 45 rl 17 51 49 ll 24 70 71 rxd 1 37 38 rxc 20 66 67 cts 80 68 69 dsr 78 35 36 dcd 19 39 40 ri 21 76 77 sct 79 receivers see pinout diagram for various ground pins 4 22 12 30 7 25 17 35 6 24 8 26 9 27 11 29 13 31 15 5 23 db-37 connector 10 14 32 v ss 22 f 22 f22 f 22 f va ri ous vcc supply pins 27 26 30 28 31 1n5819 c1- c2- c1+ c2+ 10 f 12 11 10 9 tdec0 tdec1 tdec2 tdec3 rdec0 rdec1 rdec2 rdec3 2 3 4 5 +5v 13 v cc sp522 1 20 21 22 10 f 10 f 11 15 10 9 18 24 1 0 0 1 tied to tdec0 tied to tdec1 dp1 dp0 +5v 10 f + + + + ++ + + v dd v ss 7 8 14 rs-449 mode rs-423 outputs rs-423 inputs ?v 6 4 5 3 latch_en 2 loopbck gnd
19 rev. 7/10/03 sp522 multi?ode serial transceivers ?copyright 2003 sipex corporation d eh package: plastic small outline (soic) (wide) dimensions (inches) minimum/maximum (mm) a a1 l b e a a1 b d e e h l 24?in 0.093/0.104 (2.352/2.649) 0.004/0.012 (0.102/0.300) 0.013/0.020 (0.330/0.508) 0.599/0.614 (15.20/15.59) 0.291/0.299 (7.402/7.600) 0.050 bsc (1.270 bsc) 0.394/0.419 (10.00/10.64) 0.016/0.050 (0.406/1.270) 0?8 (0?8?
20 rev. 7/10/03 sp522 multi?ode serial transceivers ?copyright 2003 sipex corporation d eh package: plastic shrink small outline (ssop) dimensions (inches) minimum/maximum (mm) 24?in a a1 l b e a a1 b d e e h l 0.068/0.078 (1.73/1.99) 0.002/0.008 (0.05/0.21) 0.010/0.015 (0.25/0.38) 0.317/0.328 (8.07/8.33) 0.205/0.212 (5.20/5.38) 0.0256 bsc (0.65 bsc) 0.301/0.311 (7.65/7.90) 0.022/0.037 (0.55/0.95) 0?8 (0?8?
21 rev. 7/10/03 sp522 multi?ode serial transceivers ?copyright 2003 sipex corporation 44 pin mqfp (ms-022 bc) l1 5 -16 0 min. 0 ? 5 -16 l 0.30" rad. typ. 0.20" rad. typ. c e1 1 d1 d c l c l -b- -d- -a- 1 e e seating plane a1 a a b a2 d2 e2 1 dimensions minimum/maximum (mm) symbol a a1 a2 b d d1 d2 e e1 e2 e n 44?in mqfp jedec ms-022 (ab) variation min nom max 2.45 0.00 0.25 1.80 2.00 2.20 0.29 0.45 13.20 bsc 10.00 bsc 8.00 ref 13.20 bsc 10.00 bsc 8.00 ref 0.80 bsc 44 common dimentions symbl min nom max c 0.11 23.00 l 0.73 0.88 1.03 l1 1.60 basic package: 44 pin mqfp
22 rev. 7/10/03 sp522 multi?ode serial transceivers ?copyright 2003 sipex corporation 44 pin lqfp l 11 - 13 0 min 11 - 13 0 ? dimensions minimum/maximum (mm) symbol a a1 a2 b d d1 e e e1 n 44?in lqfp jedec ms-026 (bcb) variation min nom max 1.60 0.05 0.15 1.35 1.40 1.45 0.30 0.37 0.50 12.00 bsc 10.00 bsc 0.80 bsc 12.00 bsc 10.00 bsc 44 c l1 b e a2 common dimentions symbl min nom max c 0.11 23.00 l 0.45 0.60 0.75 l1 1.00 basic 0.2 rad. max. 0.08 rad. min. seating plane a1 a a e 1 d 1 d c l c l -d- pin 1 e package: 44 pin lqfp
23 rev. 7/10/03 sp522 multiemode serial transceivers ? copyright 2003 sipex corporation ordering information model temperature range package types sp522ct ........................................................................... 0 c to +70 c .............................................................................................. 24-pin soic sp522ca .......................................................................... 0 c to +70 c ............................................................................................. 24-pin ssop SP524CF ........................................................................... 0 c to +70 c ............................................................................................ 44-pin mqfp sipex corporation reserves the right to make changes to any products described herein. sipex does not assume any liability aris ing out of the application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others. corporation analog excellence sipex corporation headquarters and sales office 233 south hillview drive milpitas, ca 95035 tel: (408) 934-7500 fax: (408) 935-7600 sales office 22 linnell circle billerica, ma 01821 tel: (978) 667-8700 fax: (978) 670-9001 e-mail: sales@sipex.com please consult the factory for pricing and availability on a tape-on-reel option.

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