SN74ALVCH16501DL

Overview

The SN74ALVCH16501DL is an 18-bit universal bus transceiver with 3-state outputs from the Texas Instruments Widebus family. It operates within a supply voltage range of 1.65 V to 3.6 V and features a maximum propagation delay of 3.9 ns at 3.3 V. The device provides ±24-mA output drive capability and incorporates active bus-hold circuitry on data inputs to eliminate external pullup or pulldown resistors. Latch-up performance exceeds 250 mA per JESD 17, and ESD protection meets JESD 22 standards for human-body and machine models. It is housed in a 56-pin SSOP (DL) package.

Feature Summary

• Combines D-type latches and D-type flip-flops to support transparent, latched, or clocked operation modes
• Active bus-hold circuitry maintains valid logic states on unused or undriven inputs without external components
• Data flow direction controlled by independent output-enable, latch-enable, and clock inputs

Applications

• High-density memory mapping systems
• Clock drivers and buffered oscillators
• Multiplexer control circuits

Procurement Notes

Verify the specific DL suffix indicates the SSOP package configuration when sourcing. Confirm RoHS compliance status and lead finish details against the latest manufacturer packaging addendum. Ensure operating temperature requirements align with the specified -40°C to +85°C range before finalizing procurement orders.

Selection Notes

Select this component for designs requiring high-speed bidirectional data transfer across wide buses. The integrated bus-hold feature simplifies input handling for floating lines. Verify that the required output drive current does not exceed the ±24 mA specification at the target operating voltage.

Part Context

This device belongs to the Texas Instruments ALVCH logic series, designed for low-voltage CMOS applications. It serves as a bridge between different voltage domains while maintaining signal integrity through 3-state outputs. The part is widely used in portable electronics and battery-powered systems due to its efficient power consumption characteristics.

Replacement Considerations

SN74ALVCH16501DGGR

FAQ

How does the device handle unused data inputs?

The SN74ALVCH16501DL includes active bus-hold circuitry that holds unused or undriven inputs at a valid logic state, removing the need for external pullup or pulldown resistors.

What controls the direction of data flow?

Data flow in each direction is managed by separate output-enable (OEAB/OEBA), latch-enable (LEAB/LEBA), and clock (CLKAB/CLKBA) inputs.