SN74HC373AN

Overview

The SN74HC373AN is an octal transparent D-type latch with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and supports an operating temperature from -40°C to 85°C. The device features high-current outputs capable of driving up to 15 LSTTL loads, making it suitable for buffer registers, I/O ports, bidirectional bus drivers, and working registers. Propagation delay ranges from 12 ns to 26 ns depending on the supply voltage and load capacitance.

Feature Summary

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

Applications

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

Procurement Notes

Verify the package type matches the required application, as this specific part number denotes the PDIP (N) tube packaging. Confirm that the 2 V to 6 V supply voltage range aligns with the system design requirements. Ensure the -40°C to 85°C operating temperature range is sufficient for the intended environment. Check for any specific RoHS compliance documentation if required by project standards.

Selection Notes

Select this component when an octal latch with 3-state outputs is needed for bus-oriented applications. It is compatible with standard CMOS logic families and can drive LSTTL loads directly. Consider the propagation delay specifications relative to the system clock speed. Verify that the PDIP package fits the available PCB space and assembly method.

Part Context

This device belongs to the SN74HC373A family of octal transparent D-type latches. It shares functional similarities with other 74-series latches but offers specific high-current output capabilities. The HC series indicates high-speed CMOS technology, providing compatibility with various logic families while maintaining low power consumption.

Replacement Considerations

Direct substitutes include SN74HC373ADBR and SN74HC373APWR, which offer the same functionality in different packages.