CD74HC157SM

Overview

The CD74HC157SM is a quad 2-input multiplexer from the HCT/HC series, manufactured by Harris Corporation. It selects four bits of data from two sources under control of a common select input. The device features true outputs and operates on a single 5V supply. It is housed in a small outline package (SOP) with 16 terminals. The component supports bidirectional data handling capabilities within its logic structure and is designed for high-speed CMOS applications.

Feature Summary

• Quad 2-input multiplexing architecture
• Common select input control
• True output polarity
• CMOS technology construction

Applications

• Data routing between register sets
• Function signal generation
• General-purpose logic switching

Procurement Notes

Verify the manufacturer designation as Harris Corporation or its successors. Confirm the SOP-16 package type matches system requirements. Check RoHS compliance status as historical records may vary. Ensure the part number suffix 'SM' corresponds to the specific tape-and-reel or bulk packaging variant required for assembly processes.

Selection Notes

Select this component when a quad 2-to-1 multiplexing function is required in HC-series logic families. It serves as a direct functional replacement for standard 74HC157 devices. Consider the operating temperature range and voltage specifications to ensure compatibility with the target circuit environment and power supply constraints.

Part Context

This device belongs to the broader 74HC logic family, characterized by high-speed CMOS operation. It is pin-compatible with Low-Power Schottky TTL (LSTTL) series devices, facilitating integration into mixed-technology systems. The CD74HC157SM specifically denotes the surface-mount small outline package variant produced by Harris Corporation.

Replacement Considerations

The CD74HC158 is a confirmed substitute offering inverted outputs while maintaining identical pinout and logical selection functions. Standard 74HC157 equivalents from other manufacturers are also viable replacements provided they meet the same electrical and mechanical specifications.