74HC541
Description
The HD74HC540 is an inverting buffer and the HD74HC541 is a non-inverting buffer. The 3-state control gate operates as a two-input NOR such that if either G 1 or G 2 are high, all eight outputs are in the highimpedance state.
Features
- -
- -
- High Speed Operation: tpd = 11.5 ns typ (CL = 50 p F) 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
Inputs G1 L L H X X : Z : G2 L L X H A L H X X Output Y HD74HC540 H L Z Z HD74HD541 L H Z Z irrelevant off (high-impedance) state of a 3-state output.
HD74HC540/HD74HC541
Pin Arrangement
HD74HC540
G1 A1 A2 A3 A4 A5 A6 A7 A8
20 VCC 19 G2 18 Y1 17 Y2 16 Y3 15 Y4 14 Y5
2 3 4 5 6 7 8 9
13 Y6 12 Y7 11 Y8
GND 10
(Top view)
HD74HC540/HD74HC541
HD74HC541
G1 A1 A2 A3 A4 A5 A6 A7 A8
20 VCC 19 G2 18 Y1 17 Y2 16 Y3 15 Y4 14 Y5
2 3 4 5 6 7 8 9
13 Y6 12 Y7 11 Y8
GND 10
(Top...
