SN74ALS992DWRG4

Overview

The SN74ALS992DWRG4 is a single D-type transparent latch from the Texas Instruments 74ALS series, housed in a 24-SOIC surface-mount package. It features nine independent data channels with tri-state outputs and read-back capability. The device operates on a 4.5V to 5.5V supply, drawing 80mA of quiescent current. Key electrical parameters include a propagation delay of 6ns, an output high current of 400µA, and an output low current of 8mA. It supports a wide operating temperature range from 0°C to 70°C.

Feature Summary

• Provides nine-bit parallel data storage with transparent latching behavior controlled by the enable input.
• Features tri-state outputs for effective bus driving and system isolation.
• Includes read-back functionality allowing internal state monitoring via dedicated feedback pins.

Applications

• Parallel data buffering in industrial control systems
• Address latching within microprocessor-based interfaces
• Data storage in high-speed digital logic circuits

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS3 compliance status as indicated by the G4 suffix. Check for obsolete status and availability of parameter-equivalent alternatives like the SN74ALS992DW if new production units are unavailable. Ensure packaging matches tape-and-reel specifications for automated assembly.

Selection Notes

Select this component when nine-bit latching with read-back is required in ALS speed applications. Compare against HC or AS series variants based on specific power consumption and switching speed requirements. Verify that the 24-SOIC footprint aligns with existing PCB layout constraints and thermal management strategies.

Part Context

This part belongs to the Texas Instruments 74ALS logic family, known for advanced low-power Schottky performance. It serves as a specialized latch variant within the broader 74-series ecosystem, offering higher speed than standard LS devices while maintaining lower power dissipation than original TTL standards.

Replacement Considerations

SN74ALS992DW is listed as a parameter-equivalent alternative.