1 Features

• Operating voltage range of 4.5V to 5.5V

• High-current 3-state noninverting outputs drive bus

lines directly or up to 15 LSTTL loads

• Low power consumption, 80μA max ICC

• Typical tpd = 22ns

• ±6mA output drive at 5V

• Low input current of 1μA max

• Inputs are TTL-voltage compatible

• Bus-structured pinout

2 Description

These octal edge-triggered D-type flip-flops feature

3-state outputs designed specifically for bus driving.

The ’HCT574 devices are particularly suitable for

implementing buffer registers, I/O ports, bidirectional

bus drivers, and working registers.