Datasheet Details
| Part number | HD74HC640 |
|---|---|
| Manufacturer | Hitachi Semiconductor (now Renesas) |
| File Size | 69.43 KB |
| Description | Octal Bus Transceivers |
| Datasheet |
 HD74HC640 Datasheet
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General Description
Each device has an active enable G and a direction control input, DIR.
when DIR is high, data flows from the A inputs to the B outputs.
When DIR is low, data flows from the B inputs to the A outputs.
Key Features
- High Speed Operation: tpd = 12 ns typ (CL = 50 pF) High Output Current: Fanout of 15 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C) Function Table Control Inputs G L L H DIR L H X Operation HD74HC640 B data to A bus A data to B bus Isolation HD74HC643 B data to A bus A data to B bus Isolation HD74HC640/HD74HC643 Pin Arrangement HD74HC640 DIR A1 A2.