IN74AC640
TECHNICAL DATA
Octal 3-State Inverting Bus Transceiver
High-Speed Silicon-Gate CMOS
The IN74AC640 is identical in pinout to the LS/ALS640, HC/HCT640. The device inputs are patible with standard CMOS outputs; with pullup resistors, they are patible with LS/ALS outputs. The IN74AC640 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.
- Outputs Directly Interface to CMOS, NMOS, and TTL
- Operating Voltage Range: 2.0 to 6.0 V
- Low Input Current: 1.0 µA; o.1 µA @ 25°C
- High Noise Immunity Characteristic of CMOS Devices
- Outputs Source/Sink 24 m A
ORDERING INFORMATION IN74AC640N Plastic IN74AC640DW SOIC TA = -40° to 85° C for all packages
PIN ASSIGNMENT
LOGIC DIAGRAM
FUNCTION TABLE
Control Inputs Output Enable L Direction L Operation Data...
