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SN54HCT257 - QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXER

General Description

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The ’HCT257 devices are designed to multiplex signals from 4-bit data sources to 4-output data lines in bus-organized systems.

The 3-state outputs do not load the data lines when the output-enable (OE) input is at the high logic level.

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SN54HCT257, SN74HCT257 QUADRUPLE 2ĆLINE TO 1ĆLINE DATA SELECTORS/MULTIPLEXERS WITH 3ĆSTATE OUTPUTS SCLS072D − NOVEMBER 1988 − REVISED SEPTEMBER 2003 D Operating Voltage Range of 4.5 V to 5.5 V D High-Current 3-State Outputs Interface Directly With System Bus D Typical tpd = 17 ns D Low Power Consumption, 80-µA Max ICC D ±6-mA Output Drive at 5 V D Low Input Current of 1 µA Max D Inputs Are TTL-Voltage Compatible D Provide Bus Interface From Multiple Sources in High-Performance Systems D Buffered Inputs and Outputs SN54HCT257 . . . J PACKAGE SN74HCT257 . . . D OR N PACKAGE (TOP VIEW) SN54HCT257 . . .