SN74ALVCH162373LR

Overview

The SN74ALVCH162373LR is a 16-bit transparent D-type latch with 3-state outputs from the Texas Instruments Widebus family. It operates at supply voltages between 1.65 V and 3.6 V. The device features active bus-hold circuitry on data inputs, eliminating external pullup/pulldown resistors. Output ports include equivalent 26-Ω series resistors to reduce overshoot and undershoot. Latch-up performance exceeds 250 mA per JESD 17, and ESD protection exceeds 2000 V (Human-Body Model) and 200 V (Machine Model).

Feature Summary

• Active bus-hold circuitry maintains valid logic states on unused or undriven data inputs without requiring external components.
• Output ports incorporate equivalent 26-Ω series resistors to minimize signal overshoot and undershoot.
• Latch-up performance exceeds 250 mA per JESD 17 standards.
• ESD protection capabilities exceed 2000 V via Human-Body Model and 200 V via Machine Model.

Applications

• Implementing buffer registers
• Configuring I/O ports
• Bidirectional bus drivers
• Working registers

Procurement Notes

Verify the specific ordering suffix 'LR' corresponds to the SSOP-48 package in tape and reel configuration. Confirm RoHS compliance and lead finish details against the latest Package Option Addendum. Ensure operating temperature range requirements align with the -40°C to +85°C specification for this part number.

Selection Notes

Select this component when designing systems requiring 16-bit latching within the 1.65-V to 3.6-V voltage domain. The integrated bus-hold feature simplifies input handling for floating lines. The built-in output resistance reduces the need for external series termination components, optimizing board space and design complexity.

Part Context

This device belongs to the Texas Instruments Widebus family of logic ICs. It functions as two independent 8-bit latches or a single 16-bit latch. The SN74ALVCH162373LR variant specifically utilizes the DL package format. It provides high-speed data storage with controlled output impedance characteristics suitable for modern low-voltage digital interfaces.

Replacement Considerations

Public confirmed substitute: SN74ALVCH162373DL.

FAQ

How does the device handle unused data inputs?

The SN74ALVCH162373LR includes active bus-hold circuitry that holds unused or undriven data inputs at a valid logic state, removing the necessity for external pullup or pulldown resistors.

What is the function of the internal series resistors in the outputs?

The output ports contain equivalent 26-Ω series resistors designed to reduce signal overshoot and undershoot, thereby eliminating the requirement for external resistors.