SN74ALVCH16841DL

Overview

The SN74ALVCH16841DL 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. It can be configured as two 10-bit latches or one 20-bit latch, with internal transparent D-type latch units. Data inputs include bus-hold functionality, eliminating the need for external pull-up or pull-down resistors.

Feature Summary

• Features three-state outputs optimized for driving large capacitive or low-impedance loads
• Incorporates bus-hold functionality on data inputs to remove requirement for external pull-up or pull-down resistors
• Configurable architecture allowing operation as either two 10-bit latches or a single 20-bit latch
• Provides electrostatic discharge protection exceeding 2000V per MIL-STD-883 Method 3015

Applications

• Data bus latch buffering between MCU/FPGA, processors, and external peripherals
• Unidirectional parallel data transmission and expansion I/O ports
• Buffer registers, working registers, and temporary data storage
• Multi-channel parallel data sampling latching to isolate frontend and backend timing
• Industrial control board backplane bus drivers

Procurement Notes

Verify the specific suffix 'DL' corresponds to the 56-pin TSSOP package when sourcing. Confirm the manufacturer is Texas Instruments to ensure compatibility with the specified EPIC process technology. Check for updated lifecycle status as logic components may transition to obsolete status over time. Ensure the operating voltage requirements align with the 1.65V to 3.6V specification before integration into the design.

Selection Notes

Select this component when a wide voltage range from 1.65V to 3.6V is required for 20-bit data latching applications. It is suitable for designs needing high drive capability for low-impedance loads without external resistors. Consider this part for systems requiring configurable latch widths, supporting both 10-bit and 20-bit configurations. Verify that the TSSOP56 package fits the available PCB space constraints.

Part Context

This device belongs to the SN74ALVCH series of advanced low-voltage CMOS logic products. It is part of Texas Instruments' portfolio of bus interface devices designed for high-speed data transfer in low-voltage environments. The ALVCH series typically offers improved performance over standard LVCMOS logic while maintaining compatibility with various system voltages.

Replacement Considerations

Consult official substitution guides for equivalent 20-bit latches in the ALVCH family. Verify pinout compatibility if replacing with other 56-pin packages. Ensure voltage ranges and output drive capabilities match the original design requirements.