SN74ACT373PWR

Overview

The SN74ACT373PWR is an octal transparent D-type latch manufactured by Texas Instruments within the 74ACT logic family. It features a 20-pin TSSOP surface-mount package and operates with non-inverting outputs. The device supports a supply voltage range of 4.5 V to 5.5 V, ensuring compatibility with standard CMOS logic levels. Key electrical characteristics include a propagation delay of 10 ns, a static current of 4 uA, and output drive capabilities of 32 mA low-level and -24 mA high-level currents. It functions reliably across an industrial temperature range from -40°C to +85°C.

Feature Summary

• Octal configuration providing eight independent D-type latches in a single integrated circuit
• Transparent latch operation allowing data to pass directly to outputs when enabled
• Tri-state output capability for effective bus driving and system isolation
• CMOS construction ensuring low power consumption and high noise immunity

Applications

• Parallel-to-serial data conversion circuits
• Register files in microprocessor-based systems
• Buffering digital signals on shared communication buses
• Temporary storage of address or data lines in embedded controllers

Procurement Notes

Verify that the specific part number suffix matches the required TSSOP-20 package variant. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the procurement channel provides genuine components to avoid counterfeit risks associated with legacy logic families. Cross-reference the datasheet revision date to confirm technical specifications align with current design requirements.

Selection Notes

Select this component when an octal latch with tri-state outputs is required for 5V CMOS applications. The ACT series offers faster switching speeds compared to standard 74LS equivalents while maintaining compatible pinouts. Consider the TSSOP package constraints regarding thermal dissipation and board space. Verify input voltage levels match the source logic family to ensure reliable triggering without external level shifting.

Part Context

This device belongs to the Texas Instruments SN74ACT series, which bridges the performance gap between older bipolar technologies and modern CMOS solutions. The 74ACT373 specifically addresses the need for high-density data storage in compact surface-mount designs. It serves as a direct functional replacement for legacy DIP variants in modern PCB layouts requiring improved signal integrity and reduced footprint.

Replacement Considerations

The SN74ACT373PW is a comparable alternative offering identical logical functionality in the same TSSOP-20 package. Verify pinout compatibility and electrical parameters before substitution. Other series members like the SN74ACT374 provide edge-triggered behavior instead of transparency.