SN74AS298ADR

Overview

The SN74AS298ADR is a quadruple 2-input multiplexer with storage in a 16-pin SOIC 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 using the negative-going edge of the clock pulse. The device operates within a supply voltage range of 4.5 V to 5.5 V, supports a maximum clock frequency of 62 MHz, and functions across an operating temperature range of 0°C to 70°C.

Feature Summary

• Integrates dual 4-bit multiplexing and synchronous storage capabilities into a single 16-pin component
• Selects between two independent 4-bit data words for parallel processing
• Synchronously latches selected data upon the negative-going edge of the system clock

Applications

• Dual source for operands and constants in arithmetic processors
• Implementing universal-type registers with compound left-right shift patterns
• Creating BCD shift registers capable of shifting entire digits in a single clock pulse

Procurement Notes

Verify that the specific ordering suffix matches the required package type, as the 'ADR' designation corresponds to the plastic small-outline (D) package. Confirm RoHS compliance status and lead finish details against the manufacturer's current packaging information addendum before finalizing procurement specifications.

Selection Notes

This component combines the functionality of separate MSI multiplexer and flip-flop devices. Select this part when space constraints require integrating both selection logic and storage within a single integrated circuit. Ensure the design accommodates the specific timing requirements for setup and hold times relative to the clock signal.

Part Context

The SN74AS298A belongs to the Texas Instruments AS logic family, which provides high-speed performance characteristics. This specific device replaces the need for discrete multiplexer and register chips by offering equivalent functional capabilities in a compact 16-pin form factor, suitable for dense digital logic designs.

Replacement Considerations

SN74AS298AD