SN74ALVCHR16269AL

Overview

The SN74ALVCHR16269AL 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 current availability status, as this part number may be obsolete. Confirm that the ordering suffix matches the required physical footprint and pin configuration. Ensure compliance with RoHS standards if applicable to the target assembly process. Validate that the operating temperature range meets system requirements.

Selection Notes

Select this component when designing systems requiring synchronous multiplexing of 12-bit data streams into a 24-bit bus. The registered control inputs simplify timing constraints by aligning control signals with the clock edge. Consider the integrated series resistance for impedance matching needs in high-speed digital interfaces.

Part Context

This device belongs to the Texas Instruments Widebus family, designed for wide data path applications. It provides a solution for managing data flow between different speed domains or bus widths in complex digital systems.

Replacement Considerations

SN74ALVCHR16269AG

FAQ

How does the device handle unused data inputs?

The device includes active bus-hold circuitry on the data inputs, which holds them at a valid logic state without requiring external pullup or pulldown resistors.

What is the function of the SEL line?

The select (SEL) line chooses whether data from 1B or 2B is transferred to the A outputs during B-to-A storage operations.