SN74F257DR

Overview

The SN74F257DR is a quad 2-to-1 data selector/multiplexer from the Texas Instruments SN74F series, housed in a 16-pin SOIC-Narrow package. It features four independent circuits with three-state outputs. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports surface-mount installation. It exhibits a propagation delay of 7 ns and functions reliably across an operating temperature range of 0°C to +70°C.

Feature Summary

• Integrates four independent 2-to-1 multiplexers within a single integrated circuit
• Provides three-state output capability for bus-oriented systems
• Delivers high-speed switching performance characteristic of the F logic family

Applications

• Data routing in digital communication systems
• Signal selection in microprocessor-based architectures
• Bus driver applications requiring tri-state control

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with standard 5V logic levels and check that the SOIC-Narrow footprint matches the target PCB design constraints before finalizing procurement orders.

Selection Notes

Select this component when high-speed data selection is required within a 5V logic environment. The SN74F series offers faster switching speeds compared to standard LS or HC families. Confirm that the system power supply remains strictly within the 4.5V to 5.5V range to ensure reliable operation and prevent electrical overstress.

Part Context

This part belongs to the SN74F logic family, known for high-speed performance in standard 5V TTL-compatible applications. It serves as a functional equivalent to other quad multiplexers but distinguishes itself through its specific propagation delay characteristics and three-state output configuration suitable for complex digital signal routing tasks.

Replacement Considerations

SN74AS257D: Offers higher speed and current drive capabilities in a compatible package.