PHILIPS 74HC HCT258 Quad 2-Input Multiplexer; 3-State; Inverting Data Manual
Summary
This datasheet provides specifications for the 74HC and 74HCT258 quad 2-input multiplexer with 3-state inverting outputs, a high-speed Si-gate CMOS logic device. It covers functional description, truth tables, propagation delay characteristics, and application notes for data selection and bus interfacing in digital logic circuit designs.
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DATA SHEET
74HC/HCT258 Quad 2-input multiplexer; 3-state; inverting Product specification Sep File under Integrated Circuits, IC06
Page Summary Contents For PHILIPS 74HC HCT258 Quad 2-Input Multiplexer; 3-State; Inverting Data Manual
Manual Details
| Brand | Philips |
|---|---|
| Pages | 16 |
| File Size | 88.31 KB |
| Published | June 17, 2026 |
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Frequently Asked Questions
What is the primary function and key feature of the 74HC/HCT258?
It is a quad 2-input multiplexer with 3-state outputs, which selects four bits of data from two sources in an inverted form.
Is this device compatible with older TTL logic families?
Yes, the 74HC/HCT258 is high-speed Si-gate CMOS and is pin compatible with Low power Schottky TTL (LSTTL).
How does the data selection work using input S?
Source 0 data inputs are selected when 'S' is LOW, and Source 1 data inputs are selected when 'S' is HIGH.
What condition must the Output Enable (OE) pin meet to disable the outputs?
The output enable input (OE) is active LOW; removing the signal or raising it above a sufficient voltage forces the outputs into a high impedance OFF-state.