HD74BC244A Datasheet, PDF (1/8 Pages) Hitachi Semiconductor – Octal Buffers/Line Drivers With 3 State Outputs

HD74BC244A
Octal Buffers/Line Drivers With 3 State Outputs
ADE-205-007A (Z)
2nd. Edition
March 1993
Description
The HD74BC244A provides high drivability and operation equal to or better than high speed bipolar
standard logic IC by using Bi-CMOS process. The device features low power dissipation that is about 1/5
of high speed bipolar logic IC, when the frequency is 10 MHz. The device has eight inverter drivers with
three state outputs in a 20 pin package. This device is a non inverting buffer and has two active low
enables (1G and 2G). Each enable independently controls 4 buffers.
Features
• Input/Output are at high impedance state when power supply is off.
• Built in input pull up circuit can make input pins be open, when not used.
• TTL level input
• Wide operating temperature range
Ta = –40 to + 85°C
Function Table
Inputs
G
A
H
X
L
H
L
L
H : High level
L : Low level
X : Immaterial
Z : High impedance
Output Y
Z
H
L