SN74ALVCH16841DLR

Overview

The SN74ALVCH16841DLR 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 includes bus-holding inputs that eliminate the need for external pull-up or pull-down resistors. The internal structure consists of twenty transparent D-latches, which can be configured as two 10-bit latches or one 20-bit latch.

Feature Summary

• Features bus-holding inputs to maintain stable logic levels without requiring external pull-up or pull-down resistors
• Provides electrostatic discharge protection exceeding 2000V under MIL-STD-883 standards
• Offers latch-effect performance capable of withstanding currents greater than 250mA per JESD 17 standards
• Designed specifically for driving large capacitive loads or lower impedance loads

Applications

• Data bus latch buffering between MCUs, FPGAs, 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

Procurement Notes

Verify the specific package variant, as the SN74ALVCH16841 series is available in multiple packages including TSSOP56, 300-mil plastic narrow small-outline (DL), and thin shrink small-outline (DGG). Confirm that the selected part matches the required pinout and thermal characteristics for your PCB layout. Ensure compatibility with the target system's voltage levels and signal integrity requirements before finalizing procurement.

Selection Notes

Select this component when a high-density 20-bit latch is required for bus isolation or buffering applications. It is suitable for systems operating between 1.65V and 3.6V where low power consumption and robust ESD protection are critical. Consider its capability to drive heavy loads if interfacing with complex peripheral buses. Verify that the board space accommodates the chosen package type, such as the TSSOP56 or SOIC variants.

Part Context

This device belongs to the Texas Instruments 74ALVCH series, which combines advanced CMOS technology with low voltage operation. The ALVCH family is engineered for high-speed performance while maintaining low power dissipation. These components are widely used in portable electronics and industrial control systems where reliable data retention and bus management are essential for system stability.

Replacement Considerations

Direct substitutes include the SN74ALVCH16841DL and SN74ALVCH16841DGR. Verify that any replacement maintains the same 20-bit configuration and three-state output capabilities. Ensure the alternative package does not alter the pin assignment or physical footprint required by the existing design.