SN74AS250ADWR

Overview

The SN74AS250ADWR is a 1-of-16 data generator/multiplexer with 3-state outputs from the Texas Instruments AS logic family. It provides full binary decoding to select one of sixteen data inputs or use sources as an input with an inverting W output. The device features buffered 3-state bus driver inputs, symmetrical propagation delay times, and a buffered output-enable (OE) input for cascading. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range of 0°C to 70°C.

Feature Summary

• Provides full binary decoding to select 1-of-16 data inputs
• Features buffered 3-state bus driver inputs for n-line to 1-line cascading
• Includes a buffered output-enable (OE) input that places the output in a high-impedance state when taken high

Applications

• Boolean function generation
• Parallel-to-serial conversion
• Data source selection

Procurement Notes

Verify the specific ordering suffix 'DWR' corresponds to the SOIC-20 package and tape-and-reel carrier format. Confirm RoHS compliance status and lead finish details against the latest TI packaging addendum. Ensure the procurement channel supplies parts matching the SN74AS250A commercial grade specifications.

Selection Notes

Select this component for applications requiring 1-of-16 data multiplexing with high-speed AS logic performance. Consider the inverting W output polarity and the requirement for a 4.5 V to 5.5 V supply. Evaluate the need for 3-state buffering and cascading capabilities via the OE input before finalizing the design.

Part Context

This part belongs to the Texas Instruments SN74AS250A series, which are 1-of-16 data generators/multiplexers with 3-state outputs. The AS logic family offers faster switching speeds compared to standard TTL or ALS families. The device is designed for high-performance digital systems requiring efficient data routing and signal conditioning.

Replacement Considerations

SN54AS250AJT

FAQ

What is the function of the OE input?

The OE input is a buffered output-enable that, when taken high, places the output in a high-impedance state. This allows for n-line to 1-line cascading without loading the bus lines.

How does the device handle data selection?

The device uses four address inputs (A, B, C, D) to provide full binary decoding, selecting one of the sixteen data inputs (E0-E15) to drive the inverting W output.