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PI74FCT162Q245T LOW NOISE 16-BIT BIDIRECTIONAL TRANSCEIVERS
PI74FCT162Q245T
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Product Features:
* VCC = 5V 10% * Balanced output drivers: 12 mA * Output impedance: 35 (typical) * Typical VOLP (Output Ground Bounce) < 0.5V at VCC = 5V, TA = 25C * Bus Hold retains last active bus state during tri-state * Hysteresis on all inputs * Packages available: - 48-pin 240-mil wide plastic TSSOP (A48) - 48-pin 300-mil wide plastic SSOP (V48) - 48-pin 150-mil wide plastic BQSOP (B48) * Device models available on request
Fast, Low Noise CMOS 16-Bit Bidirectional Transceivers
Product Description:
Pericom Semiconductor's PI74FCT series of logic circuits are produced in the Company's advanced 0.6 micron CMOS technology, achieving industry leading speed grades. The PI74FCT162Q245T is a 16-bit bidirectional transceiver designed for asynchronous two-way communication between data buses. The direction control input pin (xDIR) determines the direction of data flow through the bidirectional transceiver. The Direction and Output Enable controls are designed to operate these devices as either two independent 8-bit transceivers or one 16-bit transceiver. The output enable (OE) input, when HIGH, disables both A and B ports by placing them in HIGH Z condition. The PI74FCT162Q245T is designed with current limiting resistors at its outputs to control the output edge rate resulting in lower ground bounce and undershoot. This device features a typical output impedance of 35, eliminating the need for external terminating resistors for most bus interface applications. This noise suppression benefit is designated by the letter "Q" (for quiet) in the part number. The PI74FCT162Q245T also features "Bus Hold" which retains the input's last state whenever the input goes to high-impedance preventing "floating" inputs and eliminating the need for pullup/ down resistors.
Logic Block Diagram
1DIR
2DIR
1OE
2OE
1A0
2A0
1B0 1A1 2A1
2B0
1B1 1A2 2A2
2B1
1B2 1A3 2A3
2B2
1B3 1A4 2A4
2B3
1B4 1A5 2A5
2B4
1B5 1A6 2A6
2B5
1B6 1A7 2A7
2B6
1B7
2B7
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Product Pin Description
Pin Name xOE xDIR xAx xBx GND VCC Description Output Enable Inputs (Active LOW) Direction Control Input Side A Inputs or 3-State Outputs(1) Side B Inputs or 3-State Outputs(1) Ground Power
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PI74FCT162Q245T LOW NOISE 16-BIT BIDIRECTIONAL TRANSCEIVERS
Truth Table
Inputs(1)
XOE
L L H
xDIR L H X
Outputs(1) Bus B Data to Bus A Bus A Data to Bus B High Z State
Note: 1. For the PI74FCT162Q245T, these pins have "Bus Hold." All other pins are standard, outputs, or I/Os.
Note: 1. H = High Voltage Level X = Don't Care L = Low Voltage Level Z = High Impedance
Product Pin Configuration
1DIR 1B0 1B1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
48 47 46 45 44 43 42 41 40
1OE 1A0 1A1
GND
1B2 1B3
GND
1A2 1A3
VCC
1B4 1B5
VCC
1A4 1A5
GND
1B6 1B7 2B0 2B1
48-PIN A48 B48 V48
39 38 37 36 35 34 33 32 31 30 29 28 27 26 25
GND
1D6 1A7 2A0 2A1
GND
2B2 2B3
GND
2A2 2A3
VCC
2B5 2B5 GND 2B6 2B7 2DIR
VCC
2A4 2A5 GND 2A6 2A7 2OE
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PI74FCT162Q245T LOW NOISE 16-BIT BIDIRECTIONAL TRANSCEIVERS
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature ................................................................. -65C to +150C Ambient Temperature with Power Applied ................................. -40C to +85C Supply Voltage to Ground Potential (Inputs & Vcc Only) .......... -0.5V to +7.0V Supply Voltage to Ground Potential (Outputs & D/O Only) ....... -0.5V to +7.0V DC Input Voltage ......................................................................... -0.5V to +7.0V DC Output Current ................................................................................... 120 mA Power Dissipation ......................................................................................... 1.0W Note: Stresses greater than those listed under MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.
DC Electrical Characteristics (Over the Operating Range, TA = -40C to +85C, VCC = 5.0V 10%)
Parameters Description VIH VIL IIH IIH IIL IIL IBHH IBHL IOZH IOZL VIK IO VH Input HIGH Voltage Input LOW Voltage Input HIGH Current Input HIGH Current Input LOW Current Input LOW Current Bus Hold Sustain Current High Impedance Output Current Clamp Diode Voltage Output Drive Current Input Hysteresis Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level Standard Input, VCC = Max. Bus Hold Input(4), VCC = Max. Standard Input, VCC = Min. Bus Hold Input(4), VCC = Min. Bus Hold Input(4), VCC = Min. VCC = Max. VCC = Max. VCC = Min., IIN = -18 mA VCC = Max.(3), VOUT = 2.5V Min. 2.0 VIN = VCC VIN = VCC VIN = GND VIN = GND VIN = 2.0V VIN = 0.8V VOUT = VCC VOUT = GND 0.8 1 100 -1 100 -50 +50 1 -1 -1.2 -180 Typ(2) Max. Units V V A A A A A A A V mA mV
-0.7 -50 100
Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 5.0V, +25C ambient and maximum loading. 3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second. 4. Pins with Bus Hold are identified in the pin description. 5. This specification does not apply to bi-directional functionalities with Bus Hold.
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Output Drive Characteristics (Over the Operating Range)
Parameters Description IODL IODH Output LOW Current Output HIGH Current Test Conditions(1) VCC = 5V, VIN = VIH OR VIL, VOUT = 1.5V VCC = 5V, VIN = VIH OR VIL, VOUT = 1.5V(3)
(3)
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PI74FCT162Q245T LOW NOISE 16-BIT BIDIRECTIONAL TRANSCEIVERS
Min. 36 -100
Typ(2) -- -166
Max. -- -200
Units mA mA
Output Drive Characteristics (Over the Operating Range)
Parameters Description VOH VOL Output HIGH Voltage Output LOW Voltage Test Conditions(1) VCC = Min., VIN = VIH or VIL VCC = Min., VIN = VIH or VIL IOH = -12.0 mA IOL = 12 mA Min. Typ(2) Max. Units 2.4 -- 3.3 0.4 -- 0.55 V V
Capacitance (TA = 25C, f = 1 MHz)
Parameters(4) CIN COUT Description Input Capacitance Output Capacitance Test Conditions VIN = 0V VOUT = 0V Typ 4.5 5.5 Max. 6 8 Units pF pF
Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 5.0V, +25C ambient and maximum loading. 3. Not more than one output should be tested at one time. Duration of the test should not exceed one second. 4. This parameter is determined by device characterization but is not production tested.
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PI74FCT162Q245T LOW NOISE 16-BIT BIDIRECTIONAL TRANSCEIVERS
Power Supply Characteristics
Parameters Description ICC ICC ICCD Quiescent Power Supply Current Supply Current per Input @ TTL HIGH Supply Current per Input per MHz(4) Test Conditions(1) VCC = Max. VCC = Max. VCC = Max., Outputs Open XOE = xDIR = GND One Bit Toggling 50% Duty Cycle VCC = Max., Outputs Open fI = 10 MHZ 50% Duty Cycle XOE = xDIR = GND One Bit Toggling VCC = Max., Outputs Open fI = 2.5 MHZ 50% Duty Cycle XOE = xDIR = GND 16 Bits Toggling VIN = GND or VCC VIN = 3.4V(3) VIN = VCC VIN = GND Min. Typ(2) 0.1 0.5 60 Max. 500 1.5 100 Units A mA A/ MHz
IC
Total Power Supply Current(6)
VIN = VCC VIN = GND
0.6
1.5(5)
mA
VIN = 3.4V VIN = GND VIN = VCC VIN = GND
0.9 2.4
2.3(5) 4.5(5)
VIN = 3.4V VIN = GND
6.4
16.5(5)
Notes: 1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device. 2. Typical values are at VCC = 5.0V, +25C ambient. 3. Per TTL driven input (VIN = 3.4V); all other inputs at Vcc or GND. 4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations. 5. Values for these conditions are examples of the Icc formula. These limits are guaranteed but not tested. 6. IC =IQUIESCENT + IINPUTS + IDYNAMIC IC = ICC + ICC DHNT + ICCD (fCP/2 + fINI) ICC = Quiescent Current ICC = Power Supply Current for a TTL High Input (VIN = 3.4V) DH = Duty Cycle for TTL Inputs High NT = Number of TTL Inputs at DH ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL) fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices) fI = Input Frequency NI = Number of Inputs at fI All currents are in milliamps and all frequencies are in megahertz.
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PS2050A 04/12/96
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PI74FCT162Q245T LOW NOISE 16-BIT BIDIRECTIONAL TRANSCEIVERS
Switching Characteristics over Operating Range
162Q245T Com.
(1)
162Q245AT Com. Min Max
162Q245CT Com. Min Max
162Q245DT Com. Min Max
162Q245ET Com Min Max Unit
Parameters tPLH tPHL tPZH tPZL tPHZ tPLZ tPZH tPZL tPHZ tPLZ tSK(o)
Description Propagation Delay A to B, B to A Output Enable Time XOE to A or B Output Disable Time(3) xOE to A or B Output Enable Time XDIR to A or B(3) Output Disable Time xDIR to A or B(3) Output Skew(4)
Conditions CL = 50 pF RL = 500
Min
Max
1.5 1.5 1.5 1.5 1.5 --
7.0 9.5 7.5 9.5 7.5 0.5
1.5 1.5 1.5 1.5 1.5 --
4.6 6.2 5.0 6.2 5.0 0.5
1.5 1.5 1.5 1.5 1.5 --
4.1 5.8 4.8 5.8 4.8 0.5
1.5 1.5 1.5 1.5 1.5 --
3.8 5.0 4.3 5.0 4.3 0.5
1.5 1.5 1.5 1.5 1.5 --
3.2 4.4 4.0 4.8 4.0 0.5
ns ns ns ns ns ns
Notes: 1. See test circuit and waveforms. 2. Minimum limits are guaranteed but not tested on Propagation Delays. 3. This parameter is guaranteed but not production tested. 4. Skew between any two outputs, of the same package, switching in the same direction. This parameter is guaranteed by design.
Pericom Semiconductor Corporation 2380 Bering Drive * San Jose, CA 95131 * 1-800-435-2336 * Fax (408) 435-1100 * http://www.pericom.com
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