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1 rev: a date: 01/27/04 sp319 10mbps, +5v-only v.35 interface with rs-232 (v.28) control lines ?copyri ght 2004 sipex corporation sp319 10mbps v.35 data throughput +5v-only, single supply operation 3 drivers, 3 receivers ?v.35 4 drivers, 4 receivers ?rs-232 improved v.35 receiver propagation delays no external v.35 termination resistors required termination disable for v.35 80-pin mqfp surface mount packaging pin compatible with sp320 description the sp319 is a complete v.35 interface transceiver offering 3 drivers and 3 receivers for v.35, and 4 drivers and 4 receivers for rs-232 (v.28). a sipex patented charge pump allows +5v only low power operation. rs-232 drivers and receivers are specified to operate at 120kbps, all v.35 drivers and receivers operate up to 10mbps. 10mbps, +5v-only v.35 interface with rs-232 (v.28) control lines 14 drin1 61 dra1 59 drb1 13 t1in 58 t1out 16 t2in 54 t2out 17 t3in 47 t3out 24 t4in 51 t4out 22 drin2 42 dra2 44 drb2 15 drin3 63 dra3 65 drb3 23 sten 6 tten rca1 70 rcout 1 rcb1 71 rca2 37 rcout2 20 rcb2 38 r1in 66 r1out 80 r2in 68 r2out 78 r3in 35 r3out 19 r4in 39 r4out 21 rca3 76 rcout3 79 r ten 7 rcb3 77 29, 34, 43, 60, 64, 72 vdd 32 26 30 28 31 c1+ c1- c2+ c2- 27 vss vcc 0.1 f 0.1 f 0.1 f 0.1 f +5v 25, 33, 41, 62, 73 5k ? 5k ? 5k ? 100 ? 100 ? 400k ? vcc 400k ? vcc 400k ? vcc 400k ? vcc 400k ? vcc 400k ? vcc 400k ? vcc 100 ? 3 ts000 9 env35 +5v 5k ? + + + + 75 ent sp319 typical applications circuit pinout 60 gnd 59 drb1 58 t1out 57 nc 56 nc 55 nc 54 t2out 53 nc 52 nc 51 t4out 50 nc 49 nc 48 nc 47 t3out 46 nc 45 nc 44 drb2 43 gnd 42 dra2 41 vcc 80 r1out 79 rcout3 78 r2out 77 rcb3 76 rca3 75 ent 74 nc 73 vcc 72 gnd 71 rcb1 70 rca1 69 nc 68 r2in 67 nc 66 r1in 65 drb3 64 gnd 63 dra3 62 vcc 61 dra1 rout4 21 drin2 22 t4in 24 vcc 25 c1+ 26 vdd 27 c2+ 28 gnd 29 c1- 30 c2- 31 vss 32 vcc 33 gnd 34 r3in 35 nc 36 rca2 37 rcb2 38 r4in 39 nc 40 sten 23 rcout1 1 nc 2 ts000 3 nc 4 nc 5 tten 6 r ten 7 nc 8 env35 9 nc 10 nc 11 nc 12 t1in 13 drin1 14 drin3 15 t2in 16 t3in 17 nc 18 r3out 19 rcout2 20 sp319
2 rev: a date: 01/27/04 sp319 10mbps, +5v-only v.35 interface with rs-232 (v.28) control lines ?copyri ght 2004 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 input voltages logic........................................................-0.3v to (v cc +0.5v) drivers..................................................-0.3v to (v cc +0.5v) receivers..................................................?0v at 100ma output voltages logic........................................................-0.3v to (v cc +0.5v) drivers.......................................................................?4v receivers..............................................-0.3v to (v cc +0.5v) storage temperature.......................................................-65?c to +150?c power dissipation per package 80-pin qfp (derate 18.3mw/ o c above +70 o c)..........................1500mw electrical specifications t amb = t min to t max and v cc = 5v?% unless otherwise noted. parameter min. typ. max. units conditions v.35 driver ttl input levels v il 0.8 volts v ih 2.0 volts voltage outputs open circuit voltage +1.2 volts refer to figure 1 differential outputs +0.44 +0.55 +0.66 volts r l =100 from a to b; figure 2 source impedance 50 100 150 ohms figure 4 short circuit impedance 135 150 165 ohms measured from a=b to gnd, v out =-2v to +2v; figure 5 ; t amb = +25 o c voltage output offset -0.6 +0.6 volts v offset ={[|v a |+|v b |]/2}; figure 3 ac characteristics t amb = +25 o c for all ac parameters transition time 40 ns 10% to 90%; figure 6 maximum transmission rate 10 mbps v diff out = 0.55v +20% ; figure 9 propagation delay t phl 80 100 ns measured from 1.5v of v in to 50% of v out ; figure 9 , 10 t plh 80 100 ns measured from 1.5v of v in to 50% of v out ; figure 9 , 10 v.35 receiver ttl output levels v ol 0.4 volts i out =-3.2ma v oh 2.4 volts i out =1.0ma receiver inputs differential input threshold -0.3 +0.3 volts input impedance 90 100 110 ohms figure 7 short circuit impedance 135 150 165 ohms measured from a=b to gnd v in =-2v to +2v; figure 8 ; t amb = +25 o c ac characteristics t amb = +25 o c for all ac parameters maximum transmission rate 10 mbps v in = +0.55v +20%; figure 9 propagation delay t phl 60 80 ns measured from 50% of v in to 1.5v of r out ; figure 9 , 11 t plh 60 80 ns measured from 50% of v in to 1.5v of r out ; figure 9, 11
3 rev: a date: 01/27/04 sp319 10mbps, +5v-only v.35 interface with rs-232 (v.28) control lines ?copyri ght 2004 sipex corporation electrical specifications (continued) t amb = t min to t max and v cc = 5v?% unless otherwise noted. parameter min. typ. max. units conditions rs-232 driver ttl input levels v il 0.8 volts v ih 2.0 volts voltage outputs high level output +5.0 +15.0 volts r l = 3k to gnd; figure 13 low level output -15.0 -5.0 volts r l = 3k to gnd; figure 13 open circuit output -15 +15 volts r l = ; figure 12 short circuit current -100 +100 ma r l = gnd; figure 15 power off impedance 300 ohms v cc = 0v; v out = +2v; figure 16 ac characteristics slew rate 30 v/ s figure 14 maximum transmission rate 120 kbps r l = 3k , c l = 2500pf transition time 1.56 s rise/fall time, between +3v r l = 3k , c l = 2500pf; figure 17 propagation delay t phl 28 sr l = 3k , c l = 2500pf; from 1.5v of t in to 50% of v out t plh 28 sr l = 3k , c l = 2500pf; from 1.5v of t in to 50% of v out rs-232 receiver ttl output levels v ol 0.4 volts i out = -3.2ma v oh 2.4 volts i out = 1.0ma receiver input input voltage range -15 +15 volts high threshold 1.7 3.0 volts low threshold 0.8 1.2 volts hysteresis 0.2 0.5 1 volts v cc = 5v; t a = +25?c receiver input circuit bias +2.0 volts figure 19 input impedance 3 5 7 k ? v in = +15v; figure 18 ac characteristics maximum transmission rate 120 kbps propagation delay t phl 0.1 1 s from 50% of r in to 1.5v of r out t plh 0.1 1 s from 50% of r in to 1.5v of r out power requirements no load v cc supply current 40 70 ma no load; v cc = 5.0v; t a = 25?c full load v cc supply current 60 80 ma rs-232 drivers r l = 3k ? to gnd; dc input v.35 drivers r l = 100 ? from a to b; dc input shutdown current 1.5 10 ma ts000 = env35 = 0v
4 rev: a date: 01/27/04 sp319 10mbps, +5v-only v.35 interface with rs-232 (v.28) control lines ?copyri ght 2004 sipex corporation figure 1. v.11 and v.35 driver output open-circuit voltage a b v oc 3.9k ? v oca v ocb c figure 2. v.35 driver output test terminated voltage a b 50 ? c 50 ? v t v os figure 3. v.35 driver output offset voltage a b 50 ? c 50 ? v t v os figure 4. v.35 driver output source impedance a b v 2 50 ? c 24khz, 550mv p-p sine wave v 1 figure 6. v.35 driver output rise/fall time figure 5. v.35 driver output short-circuit impedance a b c i sc 2v a b c 50 ? oscilloscope 50 ? 50 ?
5 rev: a date: 01/27/04 sp319 10mbps, +5v-only v.35 interface with rs-232 (v.28) control lines ?copyri ght 2004 sipex corporation figure 7. v.35 receiver input source impedance figure 8. v.35 receiver input short-circuit impedance a b c i sc 2v a b v 2 50 ? c 24khz, 550mv p-p sine wave v 1 figure 9. driver/receiver timing test circuit c l1 15pf r out a b a b t in c l2 f in (50% duty cycle, 2.5v p-p ) figure 10. driver propagation delays +3v 0v driver input a b driver output v o + differential output v b ?v a 0v v o 1.5v 1.5v t plh t r t f f > 10mhz; t r < 10ns; t f < 10ns v o 1/2v o 1/2v o t phl t dplh t dphl t skew = | t dplh - t dphl |
6 rev: a date: 01/27/04 sp319 10mbps, +5v-only v.35 interface with rs-232 (v.28) control lines ?copyri ght 2004 sipex corporation figure 11. receiver propagation delays v oh v ol receiver out (v oh - v ol )/2 (v oh - v ol )/2 t plh f > 10mhz; t r < 10ns; t f < 10ns output v 0d2 + v 0d2 a b 0v 0v t phl input t skew = | t phl - t plh | a v oc c a v t c 3k ? a v t c 7k ? oscilloscope scope used for slew rate measurement. a i sc c figure 14. v.28 driver output slew rate figure 15. v.28 driver output short-circuit current
7 rev: a date: 01/27/04 sp319 10mbps, +5v-only v.35 interface with rs-232 (v.28) control lines ?copyri ght 2004 sipex corporation a c v cc = 0v 2v i x a c 3k ? 2500pf oscilloscope figure 17. v.28 driver output rise/fall times figure 16. v.28 driver output power-off impedance figure 18. v.28 receiver input impedance a c i ia 15v a c v oc figure 19. v.28 receiver input open circuit bias
8 rev: a date: 01/27/04 sp319 10mbps, +5v-only v.35 interface with rs-232 (v.28) control lines ?copyri ght 2004 sipex corporation all of the v.35 receivers can operate at data rates as high as 10mbps. the sensitivity of the v.35 receiver inputs is +300mv. rs-232 (v.28) drivers the rs-232 drivers are inverting transmitters, which accept either ttl or cmos inputs and output the rs-232 signals with an inverted sense relative to the input logic levels. typically, the rs-232 output voltage swing is +9v with no load, and +5v minimum with full load. the transmitter outputs are protected against infinite short-circuits to ground without degradation in reliability. in the power off state, the output impedance of the rs-232 drivers will be greater than 300 ? over a +2v range. should the input of a driver be left open, an internal 400k ? pullup resistor to v cc forces the input high, thus committing the output to a low state. the slew rate of the transmitter output is internally limited to a maximum of 30v/ s in order to meet the eia standards. the rs-232 drivers are rated for 120kbps data rates . rs-232 (v.28) receivers the rs-232 receivers convert rs-232 input signals to inverted ttl signals. each of the four receivers features 500mv of hysteresis margin to minimize the effects of noisy transmission lines. the inputs also have a 5k ? resistor to ground; in an open circuit situation the input of the receiver will be forced low, committing the output to a logic high state. the input resistance will maintain 3k -7k ? over a +15v range. the maximum operating voltage range for the receiver is +30v, under these conditions the input current to the receiver must be limited to less than 100ma. the rs-232 receivers can operate to beyond 120kbps. charge pump the charge pump is a sipex patented design (u.s. 5,306,954) that uses an innovative approach. the charge pump, with four external capacitors, uses a four-phase voltage shifting technique to attain a symmetrical +10v power supply. the capacitors can be as low as 0.1 f with a 16 volt rating. either polarized or non-polarized capacitors can be used. theory of operation the sp319 is a single chip +5v-only serial transceiver that supports all the signals necessary to implement a full v.35 interface. three v.35 drivers and three v.35 receivers make up the clock and data signals. four rs-232 (v.28) drivers and four rs-232 (v.28) receivers are used for control line signals for the interface. v.35 drivers the v.35 drivers are +5v-only, low power voltage output transmitters. the drivers do not require any external resistor networks, and will meet the following requirements: 1. source impedance in the range of 50 ? to 150 ? . 2. resistance between short-circuited terminals and ground is 150 ? +15 ? . 3. when terminated with a 100 ? resistive load the terminal to terminal voltage will be 0.55 volts 20% so that the a terminal is positive to the b terminal when binary 0 is transmitted, and the conditions are reversed to transmit binary 1. 4. the arithmetic mean of the voltage of the a terminal with respect to ground, and the b terminal with respect to ground will not exceed 0.6 volts when terminated as in 3 above. the v.35 drivers can operate at data rates as high as 10mbps. the driver outputs are pro- tected against short-circuits between the a and b outputs and short circuits to ground. two of the v.35 drivers, drin2 and drin3 are equipped with enable control lines. when the enable pins are high the driver outputs are disabled, the output impedance of a disabled driver will nominally be 300 ? . when the enable pins are low, the drivers are active. v.35 receivers the v.35 receivers are +5v only, low power differential receivers which meet the following requirements: 1. input impedance in the range of 100 ? +10 ? . 2. resistance to ground of 150 ? +15 ? , measured from short-circuited terminals.
9 rev: a date: 01/27/04 sp319 10mbps, +5v-only v.35 interface with rs-232 (v.28) control lines ?copyri ght 2004 sipex corporation since both v+ and v- are separately generated from vcc in a no load condition, v+and v- will be symmetrical. older charge pump approaches that generate v- from v+ will show a decrease in the magnitude of v- compared to v+ due to the inherent inefficiencies in design. the clock rate for the charge pump typically operates at 15khz with 0.1 f, 16v external capacitors. shutdown mode the sp319 can be put into a low power shutdown mode by bringing both ts000 (pin 3) and env35 (pin 9) low. in shutdown mode, sp319 draws less than 2ma. for normal operation, both pins should be connected to +5v. termination enable the sp319 includes a termination enable pin that connects or disconnects the receiver input termination circuitry. a ttl logic low at ent (pin 75) will connect the "y" termination network to the v.35 receiver inputs. a ttl logic high at ent (pin 75) will disconnect the "y" termi- nation network and the receivers will operate as v.11 compliant receivers. the ent pin has an internal pull-down resistor so that a floating input will enable the termination network. the sp319 is compatible with the sp320 since pin 75 on the sp320 is designated as a no connect. external power supplies for applications where separate external supplies can be applied at the v+ and v- pins. the value of the external supply voltages should not exceed +10v. it is critical the external power supplies provide a power supply sequence of : +10v, +5v, and then -10v. applications information the sp319 is a single chip device that can implement a complete v.35 interface. three (3) v.35 drivers and three (3) v.35 receivers are used for clock and data signals and four (4) rs-232 (v.28) drivers and four (4) rs-232 (v.28) receivers can be used for the control signals of the interface. figures 25 to 28 show the sp319 configured in dte and dce applications along with an iso-2593 pin out. +10v a) c 2 + gnd gnd b) c 2 ?0v figure 20. charge pump waveforms figure 20 shows the waveforms on the positive and negative sides of capacitor c2 respectively. a free-running oscillator controls the four phases of the voltage shifting. a description of each phase follows. phase 1: v ss charge storage (figure 21) during this phase of the clock cycle, the positive side of capacitors c1 and c2 are charged to +5v. c1+ is switched to ground and the charge on c1- is transferred to c2-. since c2+ is connected to +5v, the voltage potential across capacitor c2 becomes 10v. phase 2: v ss transfer (figure 22) phase two of the clock connects the negative terminal of c2 to the vss storage capacitor and the positive terminal of c2 to ground, and transfers the generated -10v to c3. simultaneously, the positive side of capacitor c1 is switched to +5v and the negative side is connected to ground. phase 3: v dd charge storage (figure 23) the third phase of the clock is identical to the first phase - the transferred charge on c1 produces -5v on the negative terminal of c1, which is applied to the negative side of capacitor c2. since c2+ is at +5v, the voltage potential across c2 is +10v. phase 4: v dd transfer (figure 24) the fourth phase of the clock connects the negative terminal of c2 to ground and transfers the generated +10v across c2 to c4, the vdd storage capacitor. the positive side of capacitor c1 is switched to +5v and the negative side is connected to ground, and the cycle begins again.
10 rev: a date: 01/27/04 sp319 10mbps, +5v-only v.35 interface with rs-232 (v.28) control lines ?copyri ght 2004 sipex corporation 0.1 f 25 27 26 30 32 1n5819 v cc v dd c1- c2- v ss c1+ c2+ 0.1 f sp319cf 14 79 28 31 0.1 f +5v 15 20 1 22 0.1 f 0.1 f 25 27 26 30 32 1n5819 v cc v dd c1- c2- v ss c1+ c2+ 0.1 f 28 31 0.1 f +5v 0.1 f rc out 1 14 20 79 22 15 14 txd (103) txc (113) txcc (114) rxc (115) rxd (104) dtr (108) r ts (105) rl (140) ll (141) dsr (107) cts (106) dcd (109) tm (142) 78 r1 out 80 r4 out 21 rc out 2 rc out 3 dr in 2 dr in 3 dr in 1 r2 out r3 out 19 t2 in 16 t1 in 13 t3 in 17 t4 in 24 dr in 1 dr in 3 dr in 2 rc out 3 rc out 2 rc out 1 t2 in 16 t1 in 13 t3 in 17 t4 in 24 r2 out 78 r1 out 80 r3 out 19 r4 out 21 p s u w y aa x v t r h c n l e d f nn p s u w y aa x v t r h c l e d f n nn 29, 34, 43, 60, 64, 72 29, 34, 43, 60, 64, 72 b b aa iso2593 34-pin dte/dce interface connector iso2593 34-pin dte/dce interface connector sp319cf figure 25. typical dte-dce v.35 connection using the sp319 figure 21. charge pump phase 1 figure 22. charge pump phase 2 v cc = +5v +10v v ss storage capacitor v dd storage capacitor c 1 c 2 c 3 c 4 + + ++ v cc = +5v ?v ?v +5v v ss storage capacitor v dd storage capacitor c 1 c 2 c 3 c 4 + + ++ figure 23. charge pump phase 3 figure 24. charge pump phase 4 v cc = +5v ?0v v ss storage capacitor v dd storage capacitor c 1 c 2 c 3 c 4 + + ++ v cc = +5v ?v +5v ?v v ss storage capacitor v dd storage capacitor c 1 c 2 c 3 c 4 + + ++
11 rev: a date: 01/27/04 sp319 10mbps, +5v-only v.35 interface with rs-232 (v.28) control lines ?copyri ght 2004 sipex corporation a chasis ground c request to send e dce ready (dsr) h dte ready (dtr) k unassigned--- m unassigned--- p transmitted data (a) s transmitted data (b) u terminal timing (a) } 113(a) w terminal timing (b) } 113(b) y transmit timing (a) } 114(a) aa transmit timing (b) } 114(b) cc unassigned--- ee unassigned--- hh unassigned--- kk unassigned--- mm unassigned--- signal ground b clear to send d data carrier detect f ring indicator j local loopback l remote loopback n receive data (a) r receive data (b) t receive timing (a) v receive timing (b) x unassigned--- z unassigned--- bb unassigned--- dd unassigned--- ff unassigned--- jj unassigned--- ll test mode nn figure 26. iso-2593 connector pin out figure 27. typical dce v.35 interface 14 drin1 61 dra1 59 drb1 13 t1in 58 t1out 16 t2in 54 t2out 17 t3in 47 t3out 24 t4in 51 t4out 22 drin2 42 dra2 44 drb2 15 drin3 63 dra3 65 drb3 23 sten 6 tten rca1 70 rcout 1 rcb1 71 rca2 37 rcout2 20 rcb2 38 r1in 66 r1out 80 r2in 68 r2out 78 r3in 35 r3out 19 r4in 39 r4out 21 rca3 76 rcout3 79 r ten 7 rcb3 77 rxd 104(a) 104(b) cts 106 dsr 107 dcd 109 ri 125 rxc 115(a) 115(b) txcc 114(a) 114(b) 103(a) 103(b) txd 113(a) txc 113(b) rts 105 dtr 108 rlpbk 140 llpbk 141 spare spare spare 29, 34, 43, 60, 64, 72 vdd 32 26 30 28 31 c1+ c1- c2+ c2- 27 vss vcc 0.1 f 0.1 f 0.1 f 0.1 f +5v 25, 33, 41, 62, 73 5k ? 5k ? 5k ? 100 ? 100 ? 400k ? vcc 400k ? vcc 400k ? vcc 400k ? vcc 400k ? vcc 400k ? vcc 400k ? vcc 100 ? 3 ts000 9 env35 +5v 5k ? + + + + 75 ent sp319
12 rev: a date: 01/27/04 sp319 10mbps, +5v-only v.35 interface with rs-232 (v.28) control lines ?copyri ght 2004 sipex corporation 14 drin1 61 dra1 59 drb1 13 t1in 58 t1out 16 t2in 54 t2out 17 t3in 47 t3out 24 t4in 51 t4out 22 drin2 42 dra2 44 drb2 15 drin3 63 dra3 65 drb3 23 sten 6 tten rca1 70 rcout 1 rcb1 71 rca2 37 rcout2 20 rcb2 38 r1in 66 r1out 80 r2in 68 r2out 78 r3in 35 r3out 19 r4in 39 r4out 21 rca3 76 rcout3 79 r ten 7 rcb3 77 29, 34, 43, 60, 64, 72 vdd 32 26 30 28 31 c1+ c1- c2+ c2- 27 vss vcc 0.1 f 0.1 f 0.1 f 0.1 f +5v 25, 33, 41, 62, 73 5k ? 5k ? 5k ? 100 ? 100 ? 400k ? vcc 400k ? vcc 400k ? vcc 400k ? vcc 400k ? vcc 400k ? vcc 400k ? vcc 100 ? 3 ts000 9 env35 +5v txd 103(a) 103(b) rts 105 dtr 108 rlpbk 140 llpbk 141 spare spare spare txct 113(a) 113(b) 104(a) 104(b) rxd 114(a) txcc 114(b) 106 cts 107 dsr 109 dcd 125 ri 115(a) rxc 115(b) 5k ? + + + + 75 ent sp319 figure 28. typical dte v.35 interface
13 rev: a date: 01/27/04 sp319 10mbps, +5v-only v.35 interface with rs-232 (v.28) control lines ?copyri ght 2004 sipex corporation package: 80 pin mqfp 80 pin mqfp (ms-022 bc) b e seating plane a1 a a l1 5 -16 0 min. 0 ? 5 -16 l a2 0.30" rad. typ. 0.20" rad. typ. c pin 1 e1 d1 d c l e c l d2 e2 dimensions minimum/maximum (mm) symbol a a1 a2 b d d1 d2 e e1 e2 e n 80?in mqfp jedec ms-22 (bec) variation min nom max 2.45 0.00 0.25 1.80 2.00 2.20 0.22 0.40 17.20 bsc 14.00 bsc 12.35 ref 17.20 bsc 14.00 bsc 12.35 ref 0.65 bsc 80 common dimentions symbl min nom max c 0.11 23.00 l 0.73 0.88 1.03 l1 1.60 basic
14 rev: a date: 01/27/04 sp319 10mbps, +5v-only v.35 interface with rs-232 (v.28) control lines ?copyri ght 2004 sipex corporation ordering information model temperature range package types sp319cf ..................................................... 0?c to +70?c .............................................. 80-pin je dec 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 herein; neither does it convey any license under its patent rights nor t he rights of others. please consult the factory for pricing and availability on a tape-on-reel option. analog excellence corporation sipex corporation headquarters and sales office 22 linnell circle billerica, ma 01821 tel: (978) 667-8700 fax: (978) 670-9001 e-mail: sales@sipex.com sales office 233 south hillview drive milpitas, ca 95035 tel: (408) 934-7500 fax: (408) 935-7600 revision history date revision description 1/27/04 a implemented tracking revision.

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