74ALVCHR16269ALG4

Overview

The SN74ALVCHR16269ALG4 is a 12-bit to 24-bit registered bus exchanger with 3-state outputs, operating from 1.65 V to 3.6 V. It features a maximum propagation delay of 5.2 ns at 3.3 V and ±24-mA output drive capability. All outputs include equivalent 26-Ω series resistors to eliminate the need for external components. Bus hold on data inputs removes the requirement for external pullup or pulldown resistors. Latch-up performance exceeds 250 mA per JESD 17.

Feature Summary

• Registered control terminals ensure all transactions are synchronous with the clock input.
• Active bus-hold circuitry maintains unused or undriven inputs at valid logic states without external resistors.
• Outputs incorporate internal series resistors to reduce overshoot and undershoot during signal transitions.

Applications

• Interface between synchronous DRAMs and high-speed microprocessors
• Multiplexing two ports onto a single port
• Demultiplexing a single port to two separate ports

Procurement Notes

Verify the specific package variant (DL SSOP) against the datasheet requirements. Confirm RoHS compliance status as indicated in the ordering information. Ensure design safeguards account for the registered nature of control terminals, which requires a clock pulse to determine initial output states.

Selection Notes

Select this component when designing systems requiring synchronous multiplexing of 12-bit words into 24-bit buses. The registered control inputs simplify timing analysis by aligning control signals with the clock edge. Verify that the 1.65-V to 3.6-V supply range matches the system voltage domains.

Part Context

This device belongs to the Texas Instruments Widebus family, designed for high-density bus applications. It provides a solution for managing data flow between different bus widths using registered storage registers on both A and B ports. The architecture supports efficient data transfer by extending the validity period of data on the bus through output registration.

Replacement Considerations

Check for SN74ALVCHR16269AG or SN74ALVCHR16269AVR if alternative packages are required. Verify pin compatibility and electrical specifications before substitution.