SN74AHCT257BQBR

Signal Switches, Multiplexers, Decoders Overview

The SN74AHCT257BQBR is a 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 features TTL-compatible inputs. The device provides low propagation delay, typically 6ns at 25°C and 5V. It includes latch-up performance exceeding 250mA per JESD 17. The component is housed in a WQFN-16 package.

Signal Switches, Multiplexers, Decoders Feature Summary

• Quad 2-to-1 data selection with shared control logic
• Three-state outputs for bus-organized systems
• TTL-compatible CMOS inputs
• Balanced drive capability

Signal Switches, Multiplexers, Decoders Applications

• Data selection
• Multiplexing

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix BQBR corresponds to the WQFN-16 package configuration. Confirm that the active production status aligns with current manufacturing requirements. Ensure compatibility with the specified 4.5V to 5.5V operating voltage range for the target system design.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a quad multiplexer with three-state outputs is required for bus interfacing. The TTL-compatible input thresholds facilitate direct connection to legacy logic families. Consider the thermal resistance characteristics of the WQFN package for heat dissipation planning in dense layouts.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the SN74AHCT257 family of digital logic devices. It serves as a high-speed data routing solution within Texas Instruments' AHCT logic portfolio. The device integrates four independent channels into a single compact package, optimizing board space for complex signal switching applications.

Signal Switches, Multiplexers, Decoders Replacement Considerations

SN74AHCT257PW

Signal Switches, Multiplexers, Decoders FAQ

How are unused inputs handled?

Unused inputs must be terminated to VCC or GND to prevent floating states and excessive power consumption.

What is the maximum capacitive load?

The device can drive a load with total capacitance less than or equal to 50pF while meeting all datasheet specifications.