Data Sheet

1. General description
The 74HC253; 74HCT253 is a dual 4-bit multiplexer, each with four binary inputs (nI0 to
nI3), an output enable input (nOE
) and shared select inputs (S0 and S1). One of the four
binary inputs is selected by the select inputs and routed to the output nY. A HIGH on nOE
causes the outputs to assume a high-impedance OFF-state. Inputs include clamp diodes.
This enables the use of current limiting resistors to interface inputs to voltages in excess
of V
CC
.
2. Features and benefits
 Non-inverting data path
 3-state outputs interface directly with system bus
 Complies with JEDEC standard no. 7A
 Common select inputs
 Separate output enable inputs
 Input levels:
 For 74HC253: CMOS level
 For 74HCT253: TTL level
 ESD protection:
 HBM JESD22-A114F exceeds 2000 V
 MM JESD22-A115-A exceeds 200 V
 Multiple package options
 Specified from 40 Cto+85C and from 40 Cto+125C
3. Applications
 Data selectors
 Data multiplexers
74HC253; 74HCT253
Dual 4-input multiplexer; 3-state
Rev. 6 — 1 February 2016 Product data sheet