MC74VHCT373ADTR2G

Latches Overview

The MC74VHCT373ADTR2G is an octal D-type latch with 3-state output fabricated using silicon gate CMOS technology. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature from -40°C to +85°C. The device features a maximum propagation delay of 8.5 ns at 5.0 V with a 50 pF load, a typical quiescent supply current of 4 µA, and output drive capabilities of 8 mA for both high and low states. It is housed in a TSSOP-20 package.

Latches Feature Summary

• Provides TTL-compatible input levels while delivering full 5.0 V CMOS level output swings, facilitating level conversion between 3.3 V and 5.0 V systems.
• Includes power-down protection on output structures to prevent device destruction caused by supply voltage mismatches, battery backup scenarios, or hot insertion events.
• Offers high noise immunity and stable outputs through an internal three-stage circuit design incorporating a buffer output.

Latches Applications

• Interfacing 3.3 V logic systems to 5.0 V systems via level conversion
• Octal data storage applications requiring 3-state bus isolation
• High-speed digital buffering with low power dissipation requirements

Latches Procurement Notes

Verify the specific ordering suffix 'DT' corresponds to the TSSOP-20 package configuration required for your PCB layout. Confirm that the 'G' suffix indicates a lead-free, halogen-free, and RoHS-compliant component status. Ensure the manufacturer part number matches exactly to avoid functional differences associated with other series variants like the standard VHC version.

Latches Selection Notes

Select this component when TTL-compatible inputs are necessary alongside CMOS low-power characteristics. It is suitable for designs requiring 3-state outputs for bus sharing. Verify that the 4.5 V minimum supply voltage aligns with the system power rails. Consider the TSSOP-20 package dimensions against available board space constraints.

Latches Part Context

This device belongs to the MC74VHCT373A family of advanced high-speed CMOS octal latches. It is functionally compatible with standard logic families but offers improved speed and lower power consumption compared to equivalent Bipolar Schottky TTL devices. The VHCT series specifically bridges the gap between CMOS and TTL logic levels.

Latches Replacement Considerations

MC74VHCT373ADWR2G (SOIC-20 variant)

Latches FAQ

How does the MC74VHCT373ADTR2G handle interface between different voltage systems?

The device inputs are compatible with TTL levels, allowing it to interface 3.3 V systems to 5.0 V systems while providing full 5.0 V CMOS level output swings.

What protection mechanisms are included for the outputs?

The output structures provide protection when VCC = 0 V, helping prevent device destruction caused by supply voltage-input/output voltage mismatch, battery backup, or hot insertion.