The 74HC/HCT253 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC/HCT253 have two identical 4-input multiplexers with 3-state outputs which select two bits from four sources selected by common data select inputs (S0, S1). When the individual output enable (1OE, 2OE) inputs of the 4-input multiplexers are HIGH, the outputs are forced to the high impedance OFF-state.
This document is a product specification datasheet for the 74HC/HCT253 integrated circuit. It describes high-speed Si-gate CMOS devices that are pin compatible with low power Schottky TTL (LSTTL). The device features two identical 4-input multiplexers with common select inputs and separate output enable inputs, designed for bus interface applications.
| Output capability | bus driver |
|---|---|
| Logic category | MSI |
When the individual output enable inputs are HIGH, the outputs are forced to the high impedance OFF-state.
Each of the two identical multiplexers selects bits from four different sources.