MC74F657A,B OCTAL BIDIRECTIONAL TRANSCEIVER WITH 8-BIT PARITY GENERATOR CHECKER (3-STATE OUTPUTS) The MC74F657A and MC74F657B are Octal Bidirectional Transceivers with an 8-bit parity Generator/Checker and 3-state outputs. The A and B options are faster versions of the F657 and contain eight noninverting buffers with 3-state outputs and an 8-bit parity generator/checker. These devices are intended for bus-oriented applications. The buffers have a guaranteed current sinking capability of 24 mA at the A ports and 64 mA at the B ports. The Transmit/Receiver (T/R) input determines the direction of the data flow through the bidirectional transceivers. Transmit (active HIGH) enables data from A ports to B ports; Receive (active LOW) enables data from B ports to A ports. • High-Impedance NPN Base Input for Reduced Loading (20 µA in HIGH and LOW States) • Ideal in Applications Where High Output Drive and Light Bus Loading are Required (IIL is 20 µA versus Fast std of 600 µA) • Combines F245 and F280A Functions in One Package • 3-State Outputs • B Outputs, PARITY, ERROR, Sink 64 mA and Source 15 mA • 15 mA Source Current • Input Diodes for Termination Effects • Glitchless Outputs During Power Up and Power Down • High Impedance Outputs During Power Off • ESD Protection > 4000 Volts OCTAL BIDIRECTIONAL TRANSCEIVER WITH 8-BIT PARITY GENERATOR CHECKER (3-STATE OUTPUTS) FAST SCHOTTKY TTL 24 J SUFFIX CERAMIC CASE 758-01 1 N SUFFIX PLASTIC CASE 724-03 24 1 PIN ASSIGNMENT OE B 0 B 1 B 2 B 3 GND GND B 4 B 5 B 6 B 7 24 23 22 21 20 19 18 17 16 15 14 PARITY 13 24 1 DW SUFFIX SOIC CASE 751E-03 ORDERING INFORMATION MC74FXXXAJ/BJ MC74FXXXAN/BN MC74FXXXADW/BDW 1 2 3 4 5 6 7 8 9 10 T/R A 0 A 1 A 2 A 3 A 4 V CC A 5 A 6 A 7 11 12 ODD/ ERROR EVEN LOGIC SYMBOL 2 3 4 5 6 8 A 0 A 1 A 2 A 3 A 4 A 5 1 T/R 24 OE 11 9 10 A 6 A 7 EVEN/ODD PARITY 13 ERROR 12 B 0 B 1 B 2 B 3 B 4 B 5 B 6 B 7 23 22 21 20 17 16 15 14 FAST AND LS TTL DATA 4-403 Ceramic Plastic SOIC MC74F657A, B GUARANTEED OPERATING RANGES Symbol VCC Parameter Min Typ Max Unit Supply Voltage 74 4.5 5.0 5.5 V TA Operating Ambient Temperature Range 74 0 25 70 °C IOH Output Current — High 74 –3.0/–15 mA IOL Output Current — Low 74 24/64 mA FUNCTION TABLE Number of Inputs That are High 0, 2, 4, 6, 8 Inputs Don’t Care Outputs OE T/R Even/Odd Parity Error Outputs Mode L L L L L L H H L L L L H L H H L L H L H L H L Z Z H L L H Transmit Transmit Receive Receive Receive Receive Number of Inputs That are High 1, 3, 5, 7 Input/Output Inputs Input/Output Outputs OE T/R Even/Odd Parity Error Outputs Mode L L L L L L H H L L L L H L H H L L L H H L H L Z Z L H H L Transmit Transmit Receive Receive Receive Receive H X X Z Z Z H = HIGH Voltage Level; L = LOW Voltage Level; X = Don’t Care; Z = HIGH impedance state. FAST AND LS TTL DATA 4-404 MC74F657A, B DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) Limits Symbol Parameter VIH Input HIGH Voltage VIL Input LOW Voltage VIK Input Clamp Diode Voltage Min –0.73 74 Output LOW Voltage Unit V Guaranteed Input HIGH Voltage 0.8 V Guaranteed Input LOW Voltage –1.2 V VCC = MIN, IIN = –18 mA V IOH = –3.0 mA 3.4 B0–B7 PARITY, ERROR 74 A0–A7 74 0.35 B0–B7 PARITY, ERROR 74 0.4 2.0 Input HIGH Current IIL Input LOW Current IIH +IOZH Off-State Current HIGH Level Voltage Applied IIL +IOZL Off-State Current LOW Level Voltage Applied IOZH Off-State Output Current, High-Level Voltage Applied IOZL Off-State Output Current, Low-Level Voltage Applied IOS Output Short Circuit Current (Note 2) ICC Total Supply Current VCC = 4.5 V VCC = 4.75 V V IOH = –15 mA 0.5 V IOL = 24 mA 0.55 V IOL = 64 mA T/R, OE, EVEN/ODD 100 µA VCC = 0 V, VIN = 7.0 V A0–A7 2.0 mA IIH Test Conditions 2.4 2.7 VOH VOL Max 2.0 All Outputs Output HIGH Voltage Typ B0–B7, PARITY 1.0 EVEN/ODD 20 T/R, OE 40 EVEN/ODD –20 T/R, OE –40 A0–A7 B0–B7 PARITY 70 VCC = 4.5 V VCC = MIN VCC = 5.5 V, VIN = 5.5 V VCC = 5.5 V, VIN = 5.5 V µA VCC = MAX, VIN = 2.7 V µA VCC = MAX, VIN = 0.5 V VCC = MAX, VOUT = 2.7 V µA –70 VCC = MAX, VOUT = 0.5 V 50 VCC = MAX, VOUT = 2.7 V µA ERROR –50 An Outputs –60 –150 PARITY, Bn Outputs, ERROR –100 –225 ICCH 90 135 ICCL 106 150 ICCZ 98 145 VCC = MAX, VOUT = 0.5 V mA VCC = MAX, VOUT = 0 V mA VCC = MAX NOTES: 1. For conditions shown as MIN or MAX, use appropriate value specified under recommended operating conditions for the applicable device type. 2. Not more than one output should be shorted at one time, nor for more than 1 second. FAST AND LS TTL DATA 4-405 MC74F657A, B F657A AC ELECTRICAL CHARACTERISTICS Symbol Parameter 74F 74F TA = +25°C VCC = +5.0 V CL = 50 pF TA = 0°C to +70°C VCC = +5.0 V ± 10% CL = 50 pF Min Typ Max Min Max Unit tPLH tPHL Propagation Delay An to Bn or Bn to An 2.0 2.0 7.0 7.0 2.0 2.0 7.5 7.5 ns tPLH tPHL Propagation Delay An to PARITY 6.0 6.5 13 13 5.5 6.5 14 14 ns tPLH tPHL Propagation Delay EVEN/ODD to PARITY, ERROR 4.5 4.5 10.5 10.5 4.5 4.5 11 11.5 ns tPLH tPHL Propagation Delay Bn to ERROR 7.0 7.0 18 18 6.5 6.5 19 19 ns tPLH tPHL Propagation Delay PARITY to ERROR 8.0 7.0 14 14 7.0 7.0 15 15 ns tPZH tPZL Output Enable Time to HIGH or LOW Level 3.0 4.0 8.0 9.0 3.0 4.0 9.0 10 ns tPHZ tPLZ Output Disable Time from HIGH or LOW Level 2.0 2.0 7.5 6.0 2.0 2.0 8.0 6.5 ns F657B AC ELECTRICAL CHARACTERISTICS Symbol Parameter 74F 74F TA = +25°C VCC = +5.0 V CL = 50 pF TA = 0°C to +70°C VCC = +5.0 V ± 10% CL = 50 pF Min Typ Max Min Max Unit tPLH tPHL Propagation Delay An to Bn or Bn to An 2.0 2.0 6.0 6.0 2.0 2.0 6.5 6.5 ns tPLH tPHL Propagation Delay An to PARITY 4.5 4.5 11.5 11.5 4.5 4.5 13 13 ns tPLH tPHL Propagation Delay EVEN/ODD to PARITY, ERROR 2.0 2.0 7.5 7.5 2.0 2.0 8.5 8.5 ns tPLH tPHL Propagation Delay Bn to ERROR 4.0 4.0 15 15 3.5 3.5 16 16 ns tPLH tPHL Propagation Delay PARITY to ERROR 5.0 5.0 11 11 4.0 4.0 12 12 ns tPZH tPZL Output Enable Time to HIGH or LOW Level 2.0 2.0 7.0 7.0 2.0 2.0 8.0 8.0 ns tPHZ tPLZ Output Disable Time from HIGH or LOW Level 2.0 2.0 6.0 6.0 2.0 2.0 6.5 6.5 ns FAST AND LS TTL DATA 4-406 MC74F657A, B LOGIC DIAGRAM T/R OE A 0 B 0 A 1 B 1 A 2 B 2 A 3 B 3 A 4 B 4 A 5 B 5 A 6 B 6 A 7 B 7 PARITY EVEN/ODD ERROR FAST AND LS TTL DATA 4-407 Case 751E-03 DW Suffix 24-Pin Plastic SO-24 (WIDE) -A- "! ! " 24 -B1 P 12 " ! " # %# ) ) !" $ !" " ! " #! ! ) M J F K D R X 45° C ! " #! -T- " G ! 13 & ! ! ! ° ° ° ° ( ( ( ( Case 758-01 J Suffix 24-Pin Ceramic Dual In-Line 24 13 "! ! " " B ! $ ! " 1 12 -A- J K N P G D L C F -T- ! & ! ! " Case 724-03 N Suffix 24-Pin Plastic "! -A- ' " " 24 13 " ! $ !! " " ! ! 12 L C -T- K N E G M J F D " " FAST AND LS TTL DATA 4-408 ! & -B1 "# ! ! ! ! ! ° ! ° ° ° Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters can and do vary in different applications. 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ASIA PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Center, No. 2 Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong. ◊ FAST AND LS TTL DATA 4-409