SN74AS298ANSR

Overview

The SN74AS298ANSR is a quadruple 2-input multiplexer with storage, integrating the functionality of two MSI components in a single 16-pin package. It selects between two 4-bit data sources (Word 1 or Word 2) based on the word-select input and synchronously stores the selected data on the negative-going edge of the clock pulse. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports a maximum clock frequency of 62 MHz.

Feature Summary

• Integrates quadruple 2-input multiplexing with synchronous storage capabilities
• Selects between two independent 4-bit data words for parallel processing
• Stores selected data on the negative-going edge of the system clock

Applications

• Dual source for operands and constants in arithmetic processors
• Implementing separate registers capable of parallel exchange of contents
• Universal-type register for implementing various shift patterns

Procurement Notes

Verify that the ordering suffix 'ANSR' corresponds to the SOIC-16 plastic small-outline package as specified in the datasheet. Confirm the operating temperature range matches the application requirements of 0°C to 70°C. Ensure the supply voltage remains within the recommended limits of 4.5 V to 5.5 V during operation.

Selection Notes

This component combines multiplexer and flip-flop functions, replacing the need for separate SN74AS157 and SN74AS175A devices. It is suitable for designs requiring high-speed selection and storage of 4-bit data words. Consider the 62 MHz maximum clock frequency when designing timing-critical circuits.

Part Context

The SN74AS298A belongs to the Texas Instruments AS logic series, known for advanced Schottky technology. This specific part number represents the surface-mount variant housed in a 16-pin SOIC package. It provides a compact solution for applications needing dual-source data handling with synchronous storage.

Replacement Considerations

Public confirmed substitute part numbers: SN74AS298AD, SN74AS298AN.