SN74HC158 Quad 2-to-1 Data Selector/Multiplexer, Inverting CMOS
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Prices updated: 12 Oct 2026
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About this product
The SN74HC158 is a CMOS version of the quad 2-line to 1-line data selector/multiplexer, with four inverting outputs sharing a common select and enable input. It routes one of two data sources per channel and is used in digital routing, control and signal selection circuits.
Specifications
- Function
- Quad 2-to-1 data selector/multiplexer
- Output type
- Inverting
- Logic family
- HC (CMOS)
- Supply voltage
- 2 V to 6 V
- Package
- DIP-16
Frequently asked questions
Is it a drop-in replacement for the SN74LS158?
The logic function is the same, but the HC family is CMOS with a 2 V to 6 V supply range and different input and output levels from LS-TTL. Check the levels before substituting it in an LS-based design.
What should I do with unused inputs?
Tie unused CMOS inputs to VCC or GND. Leaving them floating can cause excess current draw and unpredictable outputs.
