SN74HC373NSRE4

Overview

The SN74HC373NSRE4 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, designed to drive highly capacitive or low-impedance loads 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) ranges from 12 ns to 31 ns depending on voltage and load conditions. Static current is typically 8 µA at 6 V.

Feature Summary

• High-current 3-state true outputs capable of driving heavy loads without interface components
• Transparent latch operation where outputs follow inputs while latch-enable is high
• Output-enable input isolates outputs into high-impedance state without affecting internal data retention

Applications

• Buffer registers
• I/O ports
• Bidirectional bus drivers
• Working registers

Procurement Notes

Verify the ordering suffix 'E4' indicates lead-free packaging compliant with RoHS standards as per TI documentation. Confirm the package type corresponds to SOP (NS) with 20 pins. Ensure the specific revision matches the required moisture sensitivity level and peak reflow temperature for your assembly process.

Selection Notes

Select this component when high-drive capability is required for bus lines or low-impedance loads. The HC series offers CMOS compatibility with TTL loading capabilities. Consider the 3-state output feature if bus sharing is necessary. Verify that the 2V to 6V supply range aligns with the system power architecture.

Part Context

This part belongs to the SN74HC373A family of octal transparent D-type latches. It is part of Texas Instruments' broader 74HC logic portfolio, which provides standard digital logic functions in CMOS technology. The device is functionally equivalent to other octal latches but distinguished by its specific pinout and drive characteristics.

Replacement Considerations

Direct replacements include SN74HC373ANSR and SN74HC373APWR. Check pinout compatibility and electrical specifications before substituting.