SN74ALS153D

Overview

The SN74ALS153D is a dual 1-of-4 data selector/multiplexer in the ALS logic series, housed in a 16-pin SOIC package. 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. The device features two independent multiplexing sections sharing common select inputs A and B. Electrical characteristics include a low-level output current capability of 24 mA and a high-level output current of -2.6 mA at 4.5 V. Propagation delays from select inputs to output range up to 21 ns, while data-to-output delays reach 15 ns under standard load conditions.

Feature Summary

• Contains two independent 1-of-4 multiplexers with shared binary decoding for efficient space utilization
• Includes dedicated strobe (enable) inputs for each section to control data flow independently
• Supports parallel-to-serial conversion and cascading configurations for expanded line selection

Applications

• Multiplexing multiple signal lines into a single output channel
• Parallel-to-serial data conversion circuits
• Cascaded systems requiring n-lines to n-lines routing

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official Package Option Addendum to confirm active status and packaging type. The 'D' suffix indicates a plastic small-outline package; ensure compatibility with surface-mount assembly processes. Confirm RoHS compliance and lead finish specifications required for your manufacturing environment before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring dual independent multiplexing functions within a compact footprint. Ensure the application voltage remains strictly between 4.5 V and 5.5 V to maintain specified electrical performance. Consider the 24 mA low-level sink capability for driving moderate loads without external buffering. Verify that the 0°C to 70°C commercial temperature range meets the environmental requirements of the target deployment.

Part Context

This part belongs to the Texas Instruments SN74ALS family of advanced low-power Schottky logic devices. It serves as a catalog version of the military-grade SN54ALS153, differentiated primarily by its restricted commercial temperature range. The device utilizes bipolar transistor technology to provide faster switching speeds compared to standard TTL equivalents while maintaining lower power consumption.

Replacement Considerations

The SN74AS153 is documented as a 3-state version of this part. Verify if tri-state outputs are required for the specific bus topology. No other direct pin-compatible substitutes are confirmed in the provided documentation.