SN74ALVCH162841DLR

Overview

The SN74ALVCH162841DLR is a 20-bit bus interface D-type latch manufactured by Texas Instruments. It operates within a supply voltage range of 1.65V to 3.6V and features three-state outputs designed for driving large capacitive or low-impedance loads. The device utilizes EPIC high-performance injected CMOS submicron technology and includes bus-hold functionality on data inputs to eliminate the need for external pull-up or pull-down resistors. It is housed in a 56-pin SSOP package and supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Features bus-hold circuitry on data inputs to maintain stable logic levels without requiring external pull-up or pull-down resistors.
• Designed with three-state outputs specifically optimized for driving large capacitive loads or lower impedance transmission lines.
• Capable of internal configuration as either two independent 10-bit latches or a single unified 20-bit latch structure.

Applications

• Data bus latching and buffering between microcontrollers, FPGAs, and external peripherals
• Unidirectional parallel data transmission and expansion of I/O ports
• Temporary data registration and multi-channel parallel data sampling isolation

Procurement Notes

Verify the specific suffix against official manufacturer documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with system voltage requirements and thermal constraints before integration. Cross-reference the exact part number with authorized distributors to confirm current availability status and lead times.

Selection Notes

Select this component when a high-density 20-bit storage solution is required for low-voltage digital systems. It is suitable for applications needing robust drive capability for long traces or heavy loads. Consider the SSOP package dimensions and pin count during PCB layout planning to ensure adequate spacing and thermal management.

Part Context

This device belongs to the Texas Instruments 74ALVCH series, which provides advanced low-voltage CMOS performance. The ALVCH family combines high-speed operation with low power consumption, making it ideal for portable and battery-operated applications. The 20-bit latch variant offers significant integration density compared to standard 8-bit or 16-bit alternatives.

Replacement Considerations

Consult official substitution guides for compatible parts within the same logic family. Verify that any alternative maintains identical pinout, voltage ranges, and output drive characteristics to ensure seamless integration without redesigning the host circuit board.