74ALVCH16373TTR

Overview

The STMicroelectronics 74ALVCH16373TTR is a low-voltage CMOS 16-bit D-type transparent latch with three-state outputs. It operates within a supply voltage range of 1.65 V to 3.6 V and features 3.6 V tolerant inputs and outputs. The device provides symmetrical output impedance, active bus hold on data inputs, and power-down protection. Propagation delay ranges from 3.6 ns at 3.0–3.6 V to 6.5 ns at 1.65 V. It is housed in a TSSOP-48 package.

Feature Summary

• Features 3.6 V tolerant inputs and outputs for interfacing with higher voltage signal environments.
• Includes active bus-hold circuitry to maintain valid logic states on unused or undriven inputs.
• Provides power-down protection on inputs and outputs to prevent damaging backflow currents.
• Offers symmetrical output impedance across high and low levels for effective transmission line driving.

Applications

• Low-power and very high-speed memory address drivers
• Bus-oriented applications requiring 3-state control
• Mixed 3.3 V and 5 V system environments

Procurement Notes

Verify the obsolete status of this component before procurement planning. Confirm that the TSSOP-48 tape and reel packaging matches your automated assembly requirements. Ensure design-in alternatives are identified if long-term supply continuity is required for production cycles.

Selection Notes

Select this component for designs requiring 16-bit latching with 3.6 V I/O tolerance. Consider the propagation delay specifications relative to your clock speeds. Verify that the TSSOP-48 package footprint aligns with your PCB layout constraints and thermal management needs.

Part Context

This part belongs to the 74ALVCH series of low-voltage CMOS logic devices. It is functionally compatible with standard 74 Series 16373 pinouts but optimized for lower voltage operation. The 'TTR' suffix indicates the TSSOP-48 package configuration supplied in tape and reel format.

Replacement Considerations

Check for direct cross-references from other manufacturers such as Texas Instruments (SN74ALVCH16373) or NXP (74ALVCH16373). Verify electrical compatibility and pinout alignment when substituting obsolete parts.

FAQ

Does the 74ALVCH16373 support partial power-down applications?

Yes, the device includes power-down protection on inputs and outputs to prevent potentially damaging backflow currents when powered down.

What is the maximum operating voltage for the inputs and outputs?

The inputs and outputs are tolerant up to 3.6 V, allowing interface with 3.6 V signal environments.