SN74ALVCH162268KR

Overview

The SN74ALVCH162268KR is a 12-bit to 24-bit registered bus exchanger with 3-state outputs, manufactured by Texas Instruments. It operates from a supply voltage range of 1.65 V to 3.6 V and features a maximum propagation delay of 4.8 ns at 3.3 V. The device provides synchronous data exchange between two ports, utilizing internal registers that store data on the low-to-high transition of the clock input when appropriate clock-enable inputs are low. It supports bidirectional data flow control through active-low output enables.

Feature Summary

• Provides synchronous data exchange between narrow high-speed buses and wide lower-frequency buses using internal storage registers.
• Features B-port outputs with equivalent series resistors designed to reduce overshoot and undershoot without requiring external components.
• Includes active bus-hold circuitry on data inputs to maintain valid logic states for unused or undriven lines.

Applications

• Transferring data from a narrow high-speed bus to a wide, lower-frequency bus
• Synchronous data exchange applications requiring registered bus functionality
• Systems needing controlled bidirectional data flow between different bus widths

Procurement Notes

Verify the specific package type and manufacturer part number against official documentation before procurement. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Ensure that the ordering suffix matches the desired packaging format. Cross-reference the component datasheet for absolute maximum ratings to prevent damage during operation.

Selection Notes

Select this component when designing systems that require bridging buses of different bit-widths with synchronous registration capabilities. Consider the operating voltage range and propagation delay specifications relative to your system's timing constraints. Evaluate the need for integrated series resistors in the B-port outputs to simplify PCB layout and reduce component count.

Part Context

This device belongs to the Texas Instruments Widebus family of logic products. It is designed specifically for applications involving data transfer between buses of varying widths. The registered nature of the bus exchanger ensures stable data handling during transitions, making it suitable for complex digital systems requiring precise synchronization.

Replacement Considerations

SN74ALVCH162268GR is a confirmed substitute part number available from Texas Instruments.

FAQ

How does the device handle data transfer between the A and B ports?

Data is stored in internal registers on the low-to-high transition of the clock input when the appropriate clock-enable inputs are low. The select line determines which input data is presented to the outputs.

What is the purpose of the equivalent series resistors in the B-port outputs?

The B-port outputs include equivalent series resistors designed to reduce overshoot and undershoot, eliminating the need for external resistors.