SN74ALVCH162841DL

Overview

The SN74ALVCH162841DL is a 20-bit bus-interface D-type latch manufactured by Texas Instruments. It features tri-state outputs and operates within a supply voltage range of 1.65 V to 3.6 V. The device utilizes EPIC high-performance injected CMOS submicron technology. It is housed in a 56-pin SSOP package and supports operation temperatures from -40°C to +85°C. The internal architecture consists of twenty transparent D-latches, which can be configured as two 10-bit latches or one 20-bit latch.

Feature Summary

• Features tri-state outputs designed for driving large capacitive loads or low-impedance loads
• Incorporates data input bus-holding functionality to eliminate the need for external pull-up or pull-down resistors
• Provides electrostatic discharge protection exceeding 2000 V according to MIL-STD-883 Method 3015
• Supports configuration as either two independent 10-bit latches or a single unified 20-bit latch

Applications

• Data bus latch buffering between MCUs, FPGAs, processors, and external peripherals
• Unidirectional parallel data transmission and expansion of I/O ports
• Buffer registers, working registers, and temporary data storage
• Multi-channel parallel data sampling latching to isolate front-end and back-end timing

Procurement Notes

Verify the specific suffix 'DL' corresponds to the 56-SSOP package variant when sourcing. Confirm that all unused control inputs are properly tied to VCC or GND during integration to ensure stable device operation. Review the latest datasheet revision for any updates regarding mechanical dimensions or electrical characteristics prior to finalizing procurement specifications.

Selection Notes

Select this component for applications requiring high-density 20-bit latching with tri-state capability. Ensure the system voltage aligns with the 1.65 V to 3.6 V operating range. Consider the SSOP-56 footprint constraints during PCB layout. This part is suitable for buffer register and unidirectional bus driver roles where bus-holding inputs simplify circuit design by removing external resistors.

Part Context

This device belongs to the SN74ALVCH16 series of 16-bit and 20-bit bus interface latches. It shares architectural similarities with other ALVCH family members but offers specific 20-bit capacity. The DL suffix denotes the plastic small-outline package. It complements other Texas Instruments logic products used in digital signal processing and memory interfacing systems.

Replacement Considerations

Check for direct pin-compatible alternatives within the same ALVCH family. Verify if the SN74ALVC162836DL serves as a functional substitute, noting differences in latch versus universal bus functionality. Ensure any replacement maintains the required 56-SSOP package and voltage specifications.