HD74HC242 Datasheet, PDF (1/10 Pages) Hitachi Semiconductor – Quad. Bus Transceivers (with 3-state outputs),Quad. Bus Transceivers (with noninverted 3-state outputs)

HD74HC242/HD74HC243
Quad. Bus Transceivers (with 3-state outputs)
Quad. Bus Transceivers (with noninverted 3-state outputs)
Description
The HD74HC242 is an inverting buffer and the HD74HC243 is a noninverting buffer. Each device has one
active high enable (GBA), and one active low enable (GAB). GBA enables the A output and GAB enables
the B outputs. The device does not have schmitt trigger inputs.
Features
• High Speed Operation: t_pd = 10 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
Control inputs
GAB
GBA
H
H
L
H
H
L
L
L
I : Input
O : Output
O : Inverting Output
Z : Hight Impedance
HD74HC242
Data Port Status
A
B
O
I
Z
Z
Z
Z
I
O
HC74HC243
Data Port Status
A
B
O
I
Z
Z
Z
Z
I
O