SN74HC373NG4

Overview

The SN74HC373NG4 is an octal transparent D-type latch with 3-state outputs manufactured by Texas Instruments. It features eight high-current latches in a single package, capable of driving up to 15 LSTTL loads. The device operates within a supply voltage range of 2 V to 6 V and supports an operating temperature range from -40°C to +85°C. Propagation delay (D to Q) varies from 12 ns to 26 ns at 6 V, depending on load capacitance. Static current is typically 8 µA at 6 V.

Feature Summary

• High-current 3-state true outputs designed for driving highly capacitive or low-impedance loads
• Transparent D-type latch operation where outputs follow data inputs while latch-enable is high
• Output-enable input places outputs in normal logic state or high-impedance state without affecting internal latch operations

Applications

• Implementing buffer registers
• I/O ports
• Bidirectional bus drivers
• Working registers

Procurement Notes

Verify the specific ordering suffix 'G4' against the manufacturer's latest documentation to confirm lead-free status and RoHS compliance details. Ensure the PDIP-20 package matches the target PCB footprint requirements. Confirm availability status as active production through official TI channels before finalizing procurement plans.

Selection Notes

Select this component when high-drive capability is required for bus lines without interface components. The HC series offers compatibility with standard CMOS logic levels. Consider the propagation delay specifications relative to system clock speeds. Verify that the 2 V to 6 V supply range aligns with the target application power rails.

Part Context

This part belongs to the SN74HC373A family of octal transparent D-type latches. It shares functional characteristics with other variants in the series, differing primarily in packaging options such as SSOP or TSSOP. The device is part of Texas Instruments' broader 74HC logic portfolio, designed for general-purpose digital applications requiring parallel data storage and bus interfacing.

Replacement Considerations

Direct substitutes include SN74HC373AN and SN74HC373NSR from Texas Instruments, which share identical electrical specifications but differ in package type. Cross-manufacturer equivalents like MM74HC373SJX may be considered if pinout and electrical parameters are verified against the original datasheet.