SN74ALS992NTG4

Overview

The SN74ALS992NTG4 is a D-type transparent latch from the Texas Instruments ALS logic family, housed in a 24-pin PDIP package. It features nine non-inverting outputs with tri-state capability and read-back functionality for input data verification. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports a propagation delay of 16 ns. It provides a low-level output current of 32 mA and functions reliably across an operating temperature range of 0°C to +70°C.

Feature Summary

• Transparent latch architecture with simultaneous data capture and output transmission during enable state
• Tri-state outputs allowing direct bus interfacing and system line driving
• Read-back mechanism enabling internal input data monitoring without external feedback loops

Applications

• High-speed parallel data buffering in digital communication systems
• Temporary storage registers in microprocessor-based control architectures
• Interface circuits requiring bidirectional data path isolation

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for obsolete part status indicators. Ensure packaging specifications match design requirements. Validate datasheet revisions against production batches to guarantee parameter consistency.

Selection Notes

Select this component when designing systems requiring high-speed latching with read-back capabilities. Consider the ALS series performance characteristics for speed-power optimization. Evaluate the PDIP package constraints against available PCB real estate. Assess power consumption levels relative to system thermal management strategies.

Part Context

This latch belongs to the SN74ALS992 series, representing advanced low-power Schottky technology. It serves as a specialized variant within the broader 74xx logic family, offering enhanced switching speeds compared to standard TTL equivalents while maintaining compatible pinouts for legacy system upgrades.

Replacement Considerations

Direct substitutes include the SN74ALS992DW variant, which shares identical electrical characteristics but utilizes a SOIC-24 surface-mount package. Verify pin compatibility and thermal dissipation requirements when transitioning between package types.