74AHCT373PW,112

Latches Overview

The 74AHCT373PW,112 is an octal D-type transparent latch with 3-state outputs manufactured by Nexperia. It operates within a supply voltage range of 4.5 V to 5.5 V and supports ambient temperatures from -40 °C to +125 °C. The device features TTL input levels and includes common latch enable (LE) and output enable (OE) inputs. Data enters the latches when LE is HIGH and is stored upon the HIGH-to-LOW transition. Outputs enter a high-impedance state when OE is HIGH.

Latches Feature Summary

• Features balanced propagation delays for consistent signal timing across all channels.
• All inputs incorporate Schmitt-trigger action to improve noise immunity.
• Inputs accept voltages higher than the supply voltage (VCC).
• Provides ESD protection exceeding specified thresholds for HBM, MM, and CDM standards.

Latches Applications

• Bus-oriented applications requiring data storage and transfer.
• Register designs utilizing transparent latch functionality.
• Interfaces between logic circuits operating at different voltage levels.

Latches Procurement Notes

Verify the manufacturer designation as Nexperia B.V., noting that the former NXP Standard Product business was rebranded in February 2017. Confirm the package type is TSSOP20 (SOT360-1) with a body width of 4.4 mm. Ensure compliance with JEDEC standard No. 7-A and check for RoHS certification status before procurement.

Latches Selection Notes

Select this component when TTL-compatible inputs are required alongside CMOS performance characteristics. The AHCT series ensures compatibility with Low-power Schottky TTL (LSTTL) systems. Consider the TSSOP20 package for space-constrained designs requiring thin shrink small outline packaging.

Latches Part Context

This part belongs to the 74AHC/AHCT logic family, which consists of high-speed Si-gate CMOS devices. It is functionally identical to the 74AHC573 and 74AHCT573 but utilizes a different pin arrangement. The device is designed for bus-oriented applications where 3-state outputs are necessary for efficient data management.

Latches Replacement Considerations

The 74AHCT373D serves as a direct replacement offering the same functionality in an SO20 plastic small outline package. Both variants share identical electrical specifications and pin configurations, differing only in the physical package dimensions and lead style.

Latches FAQ

How does the Latch Enable (LE) input control data storage?

When LE is HIGH, the latches are transparent, allowing data at the Dn inputs to pass directly to the outputs. When LE transitions from HIGH to LOW, the information present at the Dn inputs is stored in the latches.

What is the effect of the Output Enable (OE) input on the outputs?

When OE is LOW, the contents of the latches are available at the outputs. When OE is HIGH, the outputs enter a high-impedance OFF-state, effectively disconnecting them from the circuit without affecting the internal latch state.