1 Features

• Operating voltage range of 4.5 V to 5.5 V

• High-current3-state outputs interface directly with

system bus

• Typical tpd = 17 ns

• Low power consumption, 80-μA max ICC

• ±6-mA output drive at 5 V

• Low input current of 1 μA max

• Inputs are TTL-voltage compatible

• Provide bus interface from multiple sources in

high-performance systems

• Buffered inputs and outputs

2 Description

The ’HCT257 devices are designed to multiplex

signals from 4-bit data sources to 4-output data lines

in bus-organized systems.