SN74AS253ADR

Overview

The SN74AS253ADR is a dual 1-of-4 data selector/multiplexer with 3-state outputs manufactured by Texas Instruments. It belongs to the SN74AS74A series and features a common select input for both multiplexers. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports TTL inputs and outputs. It is housed in a 16-pin SOIC package and functions reliably across an operating temperature range of 0°C to +70°C.

Feature Summary

• Dual 1-of-4 multiplexer architecture with a shared select line
• Three-state output capability for bus-oriented designs
• TTL-compatible input and output logic levels

Applications

• Data routing in digital systems
• Bus switching applications
• Signal selection circuits

Procurement Notes

Verify the component authenticity by checking the manufacturer marking against official Texas Instruments documentation. Confirm the package type matches the specified 16-SOIC form factor. Ensure the operating conditions align with the required voltage and temperature specifications for your specific application environment before finalizing procurement.

Selection Notes

Select this component when a dual multiplexer with a common control signal is required. The 3-state outputs allow for efficient bus management without additional tri-state buffers. Consider the AS series speed characteristics and power consumption relative to other logic families if performance constraints are critical.

Part Context

This part is part of the SN74AS (Advanced Schottky) logic family, known for high-speed operation. It serves as a digital switch, directing one of four input lines to a single output based on the select inputs. The 'ADR' suffix indicates the SOIC package and tape-and-reel packaging format.

Replacement Considerations

Compatible substitutes include SN74AS253AD from the same manufacturer. Verify pin compatibility and electrical characteristics before substitution.