SN74ALS992DW

Overview

The SN74ALS992DW is a single-circuit D-type transparent latch from the Texas Instruments ALS logic family, housed in a 24-pin SOIC package. It features nine non-inverting input lines and corresponding outputs with tri-state capability. The device operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical parameters include a propagation delay of 16 ns, a low-level output current of 32 mA, and a high-level output current of -2.6 mA. It draws 80 mA during operation and functions reliably between 0°C and +70°C.

Feature Summary

• Transparent latching behavior allows data to pass directly to outputs while enabled.
• Tri-state outputs provide isolation when the enable signal is inactive.
• Read-back functionality supports internal state verification.

Applications

• Parallel data storage in digital systems
• Interface buffering for microprocessor buses
• Temporary data holding in control circuits

Procurement Notes

Verify the specific suffix against official documentation to confirm packaging type and environmental compliance. Confirm RoHS status through manufacturer datasheets as availability varies. Ensure the component meets required operating temperature ranges for the intended application environment before finalizing procurement decisions.

Selection Notes

Select this component for applications requiring transparent latching with read-back capabilities. The ALS series offers faster switching speeds compared to standard LS logic. Verify that the 24-pin SOIC package fits the board layout constraints and that the 32 mA sink current meets load requirements.

Part Context

This part belongs to the SN74ALS992 series of logic ICs manufactured by Texas Instruments. It is categorized under latches within the broader logic integrated circuit family. The device utilizes bipolar technology typical of the ALS series, providing a balance of speed and power consumption for general-purpose digital logic applications.

Replacement Considerations

SN74ALS992DWR is listed as a parameter-equivalent alternative offering tape-and-reel packaging instead of tube packaging. Both parts share identical logical functions and electrical specifications within the same ALS family.

FAQ

What is the propagation delay of the SN74ALS992DW?

The propagation delay is specified as 16 ns.

Does the SN74ALS992DW support tri-state outputs?

Yes, the device features tri-state outputs for bus isolation.