SN74AHCT257QPWRQ1

Signal Switches, Multiplexers, Decoders Overview

The SN74AHCT257QPWRQ1 is an automotive-grade quad 2-input data selector/multiplexer with three-state non-inverting outputs. It operates within a supply voltage range of 4.5V to 5.5V and supports temperatures from -40°C to +125°C. The device features TTL-compatible inputs, balanced CMOS outputs capable of sourcing and sinking 8mA, and typical propagation delays of 4.3ns at 5V. It includes shared A/B select and active-low OE control inputs.

Signal Switches, Multiplexers, Decoders Feature Summary

• AEC-Q100 qualified for automotive applications
• TTL-compatible CMOS inputs
• Balanced CMOS three-state outputs
• Wettable flank package option available

Signal Switches, Multiplexers, Decoders Applications

• Data selection
• Multiplexing
• Switching data buses between source devices

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific package suffix (PW for TSSOP or BQB for WQFN) against the required footprint. Confirm the Q1 suffix indicates automotive qualification. Ensure input signals transition rapidly to prevent oscillation and excessive power consumption due to the TTL-compatible CMOS input structure.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a quad multiplexer with three-state bus interfacing is required in automotive environments. It is suitable for 5V logic systems requiring TTL compatibility. Consider thermal resistance values if operating near maximum temperature limits. Unused inputs must be terminated to VCC or GND to ensure stable operation.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the SN74AHCT257-Q1 family of automotive digital logic devices. It provides four independent 2-to-1 multiplexing channels controlled by shared select and output enable lines. The AHCT series ensures compatibility with standard TTL logic levels while utilizing CMOS technology for low power consumption.

Signal Switches, Multiplexers, Decoders Replacement Considerations

SN74AHCT257PWREP is a comparable commercial grade variant.