SN74HC373ADBRE4

Overview

The SN74HC373ADBRE4 is an octal transparent D-type latch with three-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 eight high-current true outputs capable of driving up to 15 LSTTL loads. Propagation delay ranges from 12 ns to 31 ns depending on voltage, while output enable/disable times are between 13 ns and 31 ns. It utilizes a 20-pin TSSOP package.

Feature Summary

• Transparent data latching where outputs follow inputs when the latch-enable signal is active
• Three-state outputs that can drive highly capacitive or low-impedance loads without interface components
• Output-enable control isolates bus lines in a high-impedance state without affecting internal latch operations

Applications

• Buffer registers for data storage and isolation
• I/O ports for interfacing peripheral devices
• Bidirectional bus drivers for system communication
• Working registers in digital logic circuits

Procurement Notes

Verify the specific ordering suffix 'E4' corresponds to lead-free packaging and RoHS compliance as defined in the manufacturer's documentation. Confirm the package type matches the required PCB footprint. Ensure the operating environment remains within the specified temperature and voltage limits to maintain performance specifications.

Selection Notes

Select this component for applications requiring parallel data access and high-drive capability. The HC series offers compatibility with standard CMOS logic levels across a wide voltage range. Consider the propagation delay characteristics relative to system clock speeds. Verify that the TSSOP package dimensions fit the available board space constraints.

Part Context

This part belongs to the SN74HC373A family of octal transparent D-type latches. The 'DB' prefix indicates a SSOP package, while 'PW' denotes TSSOP. The 'E4' suffix typically signifies environmental compliance features such as lead-free construction. These devices are designed for general-purpose digital logic applications requiring reliable data retention and bus driving capabilities.

Replacement Considerations

SN74HC373ADBR is a direct substitute within the same product line offering identical electrical characteristics and functionality.