Hitachi HD74HCT449
The HD74HCT449 has 4 bus transceivers. The device has direction control inputs with individual. When GBA is high, A outputs are disable, and when GAB is high, B outputs are disable.| Part No. | HD74HCT449 |
|---|---|
| Datasheet | HD74HCT449 Download |
| Manufacturer |  Hitachi |
| Description | Quad. Bus Transceivers with Individual Direction Controls |
| Buy | Stock & Price |
DESCRIPTION
The HD74HCT449 has 4 bus transceivers. And this control inputs select data transmissible direction.FEATURES
●●
●
●
●
● LSTTL Output Logic Level Compatibility as well as CMOS Output Compatibility High Speed Operation: tpd (A to B) = 12.5 ns typ (CL = 50 pF) High Output Current: Fanout of 15 LSTTL Loads Wide Operating Voltage: VCC = 4.5 to 5.5 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C) Function Table Enable GBA H X L X H H : L : X : High Level Low Level Irrelevant. GAB H L X H X Direction DIR X H L H L Operation Isolation A data to B bus B data to A bus Isolation Isolation HD74HCT449 Pin Arrangement GBA 1 A1 2 DIR2 3 A2 4 A3 5 DIR3 6 A4 7 GND 8 (Top view) 16 VCC 15 GAB 14 B1 13 DIR1 12 B2 11 B3 10 DIR4 9 B4 Logic Diagram GBA GAB DIR1 A1 B1 To other three transceivers 2 HD74HCT449
ABSOLUTE MAXIMUM RATINGS
Item Supply voltage range Input voltage Output voltage DC current drain per pin DC current drain per VCC, GND DC input...
