SN74ALVCHR16409LR

Overview

The SN74ALVCHR16409LR is a 9-bit, 4-port universal bus exchanger with 3-state outputs from the Texas Instruments Widebus+ family. It operates on a single 1.65-V to 3.6-V supply and utilizes an EPIC submicron process. The device enables synchronous data exchange between four buses via select inputs (SEL0-SEL4), storing states on the rising clock edge when SELEN is low. B-port outputs include equivalent 26-Ω series resistors for signal integrity. Active bus-hold circuitry maintains valid logic levels on floating inputs.

Feature Summary

• Enables synchronous data exchange between four distinct buses using dedicated select inputs and clock control.
• Integrates active bus-hold circuitry on data inputs to maintain valid logic levels without external pullup or pulldown resistors.
• Features B-port outputs with integrated equivalent 26-Ω series resistors designed to reduce overshoot and undershoot.
• Provides glitch-free data transmission through specialized data-flow control logic.

Applications

• Synchronous data exchange between multiple system buses
• Universal bus interfacing in high-density digital systems
• Signal routing in multi-port communication architectures

Procurement Notes

Verify the specific LR suffix indicates tape-and-reel packaging within the DGG shrink small-outline format. Confirm the component meets the -40°C to 85°C operating temperature range required for your application environment. Ensure design compatibility with the 1.65-V to 3.6-V supply voltage specifications before integration.

Selection Notes

Select this component for applications requiring flexible, synchronous routing across four independent 9-bit buses. The integrated series resistors simplify PCB layout by eliminating external components. Verify that the input transition rates remain within specified limits to ensure proper timing performance and signal integrity during operation.

Part Context

This device belongs to the Texas Instruments Widebus+ family, leveraging EPIC technology for enhanced performance. It serves as a versatile solution for managing complex data paths in digital designs where multiple bus domains require controlled, synchronized interaction without external buffering complexity.

Replacement Considerations

The SN74ALVCH16409DL is a pin-compatible alternative available in the standard DL plastic small-outline package. Both devices share identical electrical characteristics and functionality, differing only in the physical package dimensions and thermal properties.

FAQ

How does the PRE input affect output states?

When the preset (PRE) input transitions high, all outputs are immediately disabled, entering a high-impedance state without waiting for a clock pulse.

What is the function of the SELEN input?

The select-enable (SELEN) input controls whether the device stores new data-flow states or retains existing states on the rising edge of the clock signal.