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Features

? Common Select Inputs

? Separate Output-Enable Inputs

? Three-State Outputs

? Fanout (Over Temperature Range)

- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads

- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads

? Wide Operating Temperature Range . . . -55oC to 125oC

? Balanced Propagation Delay and Transition Times

? Significant Power Reduction Compared to LSTTL

Logic ICs

? HC Types

- 2V to 6V Operation

- High Noise Immunity: NIL = 30%, NIH = 30% of VCC

at VCC = 5V

? HCT Types

- 4.5V to 5.5V Operation

- Direct LSTTL Input Logic Compatibility,

VIL= 0.8V (Max), VIH = 2V (Min)

- CMOS Input Compatibility, Il ≤ 1μA at VOL, VOH

Description

The CD74HC253 and CD74HCT253 are dual 4-to-1 line

selector/multiplexers having three-state outputs. One of four

sources for each section is selected by the common select

inputs, S0 and S1. When the output enable (1OE, 2OE) is

HIGH, the output is in the high-impedance state.