MC74HC640A Datasheet | Motorola Semiconductor

MOTOROLA SEMICONDUCTOR TECHNICAL DATA Octal 3-State Inverting Bus Transceiver High- Performance Silicon- Gate CMOS The MC54/74HC640A is identical in pinout to the LS640. The device inputs are patible with standard CMOS outputs; with pullup resistors, they are patible with LSTTL outputs. The HC640A is a 3- state transceiver that is used for 2- way asynchronous munication between data buses. The device has an active- low Output Enable pin, which is used to place the I/O ports into high- impedance states. The Direction control determines whether data flows from A to B or from B to A. - - - - - - Output Drive Capability: 15 LSTTL Loads Outputs Directly Interface to CMOS, NMOS, and TTL Operating Voltage Range: 2 to 6 V Low Input Current: 1 µA High Noise Immunity Characteristic of CMOS Devices In pliance with the Requirements Defined by JEDEC Standard No. 7A - Chip plexity: 276 FETs or 69 Equivalent Gates MC54/74HC640A J SUFFIX CERAMIC PACKAGE CASE 732- 03 20 1 N SUFFIX PLASTIC PACKAGE CASE 738- 03 20 1 DW SUFFIX SOIC PACKAGE CASE 751D- 04 ORDERING INFORMATION MC54HCXXXAJ MC74HCXXXAN MC74HCXXXADW Ceramic Plastic SOIC LOGIC DIAGRAM A1 A2 A3 A DATA PORT A4 A5 A6 A7 A8 DIRECTION OUTPUT ENABLE 2 3 4 5 6 7 8 9 1 19 18 17 16 15 14 13 12 11 B1 B2 B3 B4 B5 B6 B7 B8 B DATA PORT PIN ASSIGNMENT DIRECTION A1 A2 A3 A4 A5 A6 A7 A8 GND 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VCC OUTPUT ENABLE B1 B2 B3 B4 B5 B6 B7 B8 PIN 10 = GND PIN 20 = VCC FUNCTION TABLE Control Inputs Output Enable L L H X = don’t care Direction L H X O i Operation Data Transmitted from Bus B to Bus A (Inverted) Data Transmitted from Bus A to Bus B (Inverted) Buses Isolated (High- Impedance State) 2/97 © Motorola, Inc. 1997 REV 7 ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎ ÎÎÎ...