SN74AS298AD

Overview

The SN74AS298AD is a quadruple 2-input multiplexer with storage, integrating the functionality of two MSI devices 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 using the system clock. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports clock frequencies up to 62 MHz. It is characterized for operation from 0°C to 70°C.

Feature Summary

• Integrates quadruple 2-input multiplexing with synchronous storage capabilities
• Selects between two independent 4-bit data words via a dedicated control input
• Supports high-speed clocking for efficient data transfer operations

Applications

• Dual source selection 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 the specific ordering suffix 'AD' corresponds to the SOIC-16 plastic small-outline package configuration. Confirm that the RoHS status and lead finish match project requirements. Ensure the operating temperature range aligns with the intended application environment. Cross-reference the datasheet revision date to ensure compatibility with current design standards.

Selection Notes

This component combines multiplexing and latching functions, reducing the total component count compared to using separate MSI logic gates and flip-flops. It is suitable for designs requiring rapid switching between two distinct 4-bit data streams. Consider the propagation delay characteristics when designing high-frequency clock paths. Evaluate the power consumption against system thermal constraints.

Part Context

The SN74AS298A belongs to the Texas Instruments 74AS series, known for advanced Schottky logic technology offering high speed. This specific part number represents the AS variant packaged in a standard SOIC format. The series provides robust performance for digital logic applications requiring fast switching speeds and reliable data handling in complex integrated circuits.

Replacement Considerations

Public confirmed substitute part numbers: SN74AS298AD.A, SN74AS298AN, SN74AS298AN.A.