SN74ALVCH16409DL

Overview

The SN74ALVCH16409DL is a 9-bit, 4-port universal bus exchanger with 3-state outputs from the Texas Instruments Widebus family. It operates from 1.65 V to 3.6 V and features a maximum propagation delay of 5.1 ns at 3.3 V. The device provides ±24-mA output drive capability and includes active bus-hold circuitry on data inputs to eliminate external pullup or pulldown resistors. Latch-up performance exceeds 250 mA per JESD 17 standards. It is housed in a 56-pin SSOP (DL) package.

Feature Summary

• Enables synchronous data exchange between four distinct buses using select inputs and clock control logic.
• Incorporates active bus-hold circuitry on data inputs to maintain valid logic states without external components.
• Provides glitch-free data transmission through dedicated flow and storage control mechanisms.
• Features immediate high-impedance state activation via the preset input independent of clock pulses.

Applications

• Synchronous data routing between multiple system buses
• High-speed interconnects requiring low voltage operation
• Bus arbitration systems utilizing universal bus exchange protocols

Procurement Notes

Verify component authenticity by checking for official Texas Instruments markings and datasheet alignment. Confirm the DL suffix corresponds to the 56-SSOP package variant. Ensure design compliance with absolute maximum ratings regarding supply voltage and current limits to prevent permanent damage during integration.

Selection Notes

Select this component for applications requiring multi-port bus synchronization within the 1.65-V to 3.6-V range. Consider the 56-pin SSOP footprint for layout constraints. Evaluate the need for bus-hold functionality to simplify input conditioning. Verify timing requirements against the specified setup and hold times for the target clock frequency.

Part Context

This device belongs to the Texas Instruments 74ALVCH series, designed for advanced low-voltage CMOS applications. It serves as a specialized logic solution for managing complex data paths in portable and high-density electronic systems where power efficiency and signal integrity are critical.

Replacement Considerations

SN74ALVCH16409DLR offers identical electrical characteristics in a tape-and-reel TSSOP-DGG package.

FAQ

How does the PRE input affect output states?

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

What is the function of the bus-hold circuitry?

Active bus-hold circuitry holds unused or undriven inputs at a valid logic state, eliminating the need for external pullup or pulldown resistors.