SN74F157ADB

Overview

The SN74F157ADB is a high-speed silicon-gate logic device from the Texas Instruments 74F series. It functions as a quad 2-input data selector or multiplexer, integrating four independent multiplexing circuits within a single package. The component utilizes a 16-pin Small Outline Integrated Circuit (SOIC) surface-mount package. It operates with a supply voltage range of 4.5 V to 5.5 V and supports a commercial operating temperature range of 0°C to +70°C. Key electrical characteristics include a propagation delay of 9 ns and output drive capabilities of -1 mA for high-level current and 20 mA for low-level current.

Feature Summary

• Integrates four independent 2-to-1 multiplexing channels for efficient signal routing
• Features high-speed switching performance suitable for fast digital logic applications
• Provides TTL-compatible inputs and outputs for direct interfacing with standard logic families

Applications

• Data routing in digital communication systems
• Address decoding in microprocessor-based designs
• Waveform generation and pulse selection circuits

Procurement Notes

Verify the specific suffix 'ADB' against the manufacturer's official datasheet to confirm the exact package variant and tape-and-reel specifications. Ensure that the procurement source provides documentation confirming compliance with RoHS directives and identifies the correct moisture sensitivity level for handling requirements.

Selection Notes

Select this component when a compact surface-mount solution is required for multiple parallel data paths. The 74F series offers superior speed compared to standard 74LS equivalents. Confirm that the system power supply remains stable within the 4.5 V to 5.5 V window to maintain timing integrity and logical validity across all four channels.

Part Context

This part belongs to the Texas Instruments 74F family, known for its fast switching speeds achieved through Schottky-clamped transistor technology. The SN74F157ADB serves as the surface-mount counterpart to through-hole variants like the SN74F157N, maintaining identical logical functionality while adapting to modern PCB assembly techniques requiring smaller footprints.

Replacement Considerations

Compatible substitutes include the SN74ALS157AD for lower power consumption or the SN74HC157D for CMOS compatibility. Verify pinout consistency and ensure that the alternative device meets the required propagation delay and voltage tolerance specifications.