74HC373D - NXP Semiconductors - Octal D-type transparent latch; 3-state



Detailed Product Description

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Octal D-type transparent latch; 3-state





The 74HC/HCT373 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A.

The 74HC/HCT373 are octal D-type transparent latches featuring separate D-type inputs for each latch and 3-state outputs for bus oriented applications. A latch enable (LE) input and an output enable (OE) input are common to all latches.

The “373” consists of eight D-type transparent latches with 3-state true outputs. When LE is HIGH, data at the Dn inputs enters the latches. In this condition the latches are transparent, i.e. a latch output will change state each time its corresponding D-input changes.

When LE is LOW the latches store the information that was present at the D-inputs a set-up time preceding the HIGH-to-LOW transition of LE. When OE is LOW, the contents of the 8 latches are available at the outputs.

When OE is HIGH, the outputs go to the high impedance OFF-state. Operation of the OE input does not affect the state of the latches.

The “373” is functionally identical to the “533”, “563” and “573”, but the “563” and “533” have inverted outputs and the “563” and “573” have a different pin arrangement.





• 3-state non-inverting outputs for bus orientedapplications

• Common 3-state output enable input

• Functionally identical to the “563”, “573” and “533”

• Output capability: bus driver

• ICC category: MSI






SN54HC373, SN74HC373

Product Photos

20-SOIC 0.295

Standard Package



Integrated Circuits (ICs)


Logic - Latches





Logic Type

D-Type Transparent Latch



Output Type


Voltage - Supply

2 V ~ 6 V

Independent Circuits


Delay Time - Propagation


Current - Output High, Low

7.8mA, 7.8mA

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

20-SOIC (0.295", 7.50mm Width)

Supplier Device Package


Other Names




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