SN74HCT373PWR

Latches Overview

The SN74HCT373PWR is an octal transparent D-type latch with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports a maximum operating temperature of 85 °C. The device features typical propagation delays of 21 ns at 5.5 V and provides ±6 mA output drive capability. It utilizes a 20-pin Thin-Shrink Small Outline (TSSOP) package.

Latches Feature Summary

• Transparent D-type latching mechanism where outputs follow inputs during the high latch-enable state
• Three-state outputs capable of driving highly capacitive or low-impedance loads
• TTL-voltage compatible inputs for direct interfacing with TTL logic systems

Latches Applications

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

Latches Procurement Notes

Verify the specific ordering suffix 'PWR' corresponds to the TSSOP-20 package and tape-and-reel carrier format. Confirm RoHS compliance status and lead finish details against the latest TI Package Option Addendum, as manufacturing parameters may be subject to revision without notice.

Latches Selection Notes

Select this component when a wide voltage tolerance is required alongside TTL input compatibility. The HCT series ensures logical compatibility with standard TTL circuits while offering CMOS power efficiency. Ensure the application environment remains within the specified -40 °C to 85 °C operating temperature range.

Latches Part Context

This part belongs to the SNx4HCT373 family of octal transparent D-type latches. The family includes various package options such as SOIC, PDIP, and LCCC. The SN74 variant is designated for commercial use, distinguishing it from the SN54 military-grade counterpart which supports extended temperature ranges.

Latches Replacement Considerations

SN74HCT373DWR

Latches FAQ

How does the Output Enable (OE) pin affect internal latch operations?

The OE pin controls the external output state but does not affect the internal operation of the latches. Data can be entered or retained internally even when the outputs are in the high-impedance state.

What is the behavior of the Q outputs when the latch-enable (LE) input is low?

When the LE input is taken low, the Q outputs are latched at the logic levels that were present at the D inputs at that moment, holding the data until LE goes high again.