HD74HC540 Datasheet, PDF (1/9 Pages) Hitachi Semiconductor – Octal Buffers/Line Drivers (with 3-state outputs)

HD74HC540/HD74HC541
Octal Buffers/Line Drivers (with 3-state outputs)
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 G₁ or G₂ are high, all eight outputs are in the high-
impedance state.
Features
• High Speed Operation: t_pd = 11.5 ns typ (C_L = 50 pF)
• High Output Current: Fanout of 15 LSTTL Loads
• Wide Operating Voltage: V_CC = 2 to 6 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: I_CC (static) = 4 µA max (Ta = 25°C)
Function Table
Inputs
G₁
G₂
A
L
L
L
L
L
H
H
X
X
X
H
X
X : irrelevant
Z : off (high-impedance) state of a 3-state output.
Output Y
HD74HC540
H
L
Z
Z
HD74HD541
L
H
Z
Z