SN74AHC257QPWRQ1

Signal Switches, Multiplexers, Decoders Overview

The SN74AHC257QPWRQ1 is an automotive-grade quad 2-input data selector/multiplexer with three-state non-inverting outputs. It operates within a supply voltage range of 2V to 5.5V and supports junction temperatures from -40°C to +125°C. The device features low propagation delay, with a maximum of 9.5ns at VCC = 5V and CL = 50pF. Latch-up performance exceeds 250mA per JESD 17 standards. It is available in TSSOP-16 (PW) and WQFN-16 (BQB) packages.

Signal Switches, Multiplexers, Decoders Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for grade 1 applications
• Quad configuration providing four independent 2-to-1 multiplexing channels
• Three-state outputs allowing direct interface with bus-oriented systems
• Shared control logic utilizing common A/B select and OE enable inputs

Signal Switches, Multiplexers, Decoders Applications

• Data selection circuits
• Multiplexing signal routing
• Bus-oriented system interfacing

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific package suffix corresponds to the required form factor, as the Q1 series includes both PW (TSSOP) and BQB (WQFN) options. Confirm that the wettable flank feature is present if automatic optical inspection reliability is a design requirement. Ensure the ordering part number matches the exact temperature grade and ESD classification specified for the target automotive environment.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when designing automotive digital systems requiring high-speed data routing with minimal latency. The wide operating voltage range accommodates various power supply architectures. Consider the thermal resistance metrics provided in the datasheet for PCB layout planning. Verify input transition rates to prevent oscillation and excessive power consumption during switching events.

Signal Switches, Multiplexers, Decoders Part Context

This device belongs to the Texas Instruments SN74AHC257-Q1 family of automotive quadruple 2-input data selectors. It utilizes balanced CMOS technology to provide symmetric drive capabilities for sourcing and sinking current. The architecture is designed to replace standard logic components in environments demanding higher reliability and extended temperature tolerance.

Signal Switches, Multiplexers, Decoders Replacement Considerations

SN74AHC257PW

Signal Switches, Multiplexers, Decoders FAQ

How are unused inputs handled in this device?

Unused standard CMOS inputs must not be left floating. They should be terminated to either VCC or ground using a pull-up or pull-down resistor, typically 10kΩ, to ensure valid logic states.

What is the function of the OE pin?

The OE (Output Enable) pin controls all outputs simultaneously. When high, the outputs enter a high-impedance state; when low, they assume the logic state determined by the A/B select input.