DM74S157N

Overview

The DM74S157N is a quad 2-line to 1-line data selector/multiplexer manufactured by Fairchild Semiconductor. It contains inverters and drivers to supply full on-chip data selection to four output gates, featuring buffered inputs and outputs. The device selects a 4-bit word from one of two sources and routes it to the outputs based on the select input. A separate strobe input controls the output state. The component utilizes an Advanced Schottky process for improved switching performance with reduced power dissipation compared to standard Schottky counterparts. It is housed in a 16-lead Plastic Dual-In-Line Package (PDIP) conforming to JEDEC MS-001 standards.

Feature Summary

• Provides full on-chip data selection capability for four independent output gates
• Features buffered inputs and outputs to maintain signal integrity
• Includes a separate strobe input for precise output control

Applications

• Data routing in digital logic systems
• Signal selection in microprocessor interfaces
• Multiplexing applications requiring high-speed switching

Procurement Notes

Verify the specific ordering suffix 'N' corresponds to the 16-lead Plastic Dual-In-Line Package (PDIP) as documented in official Fairchild datasheets. Confirm that the component meets the required operating temperature range and electrical specifications for the intended application environment before procurement.

Selection Notes

Select this component when a quad multiplexer with buffered I/O and a dedicated strobe function is required. Ensure compatibility with the system's voltage levels and consider the propagation delay characteristics inherent to the Advanced Schottky technology for timing-sensitive designs.

Part Context

This part belongs to the 74S series of logic devices, known for their high-speed operation relative to standard TTL families. The DM74S157 serves as a functional equivalent to other quad multiplexers but offers distinct performance metrics due to its specific semiconductor process technology and package configuration.

Replacement Considerations

Check for pin-compatible alternatives within the same logic family or cross-reference with industry-standard equivalents that match the quad 2-to-1 multiplexer functionality and PDIP-16 package constraints.