SN74ALVCH162334DLR

Overview

The SN74ALVCH162334DLR is a 16-bit universal bus driver with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 1.65 V to 3.6 V and utilizes the EPIC submicron process. The device features active bus-hold circuitry on data inputs, eliminating the need for external pullup or pulldown resistors. It includes equivalent 26-ohm series resistors at the output port to reduce overshoot and undershoot without requiring external components. Designed for compliance with JEDEC SDRAM buffered DIMM specifications, it provides high ESD protection exceeding 2000 V per MIL-STD-883. The component is characterized for operation from -40 °C to 85 °C.

Feature Summary

• Features active bus-hold circuitry on data inputs to maintain valid logic levels for unused or floating lines.
• Incorporates equivalent 26-ohm series resistors at the output port to minimize signal overshoot and undershoot.
• Provides enhanced electrostatic discharge (ESD) protection capabilities exceeding standard industrial requirements.

Applications

• Buffered DIMM applications compliant with JEDEC 168-pin and 200-pin SDRAM specifications
• Universal bus drivers in widebus architecture systems
• High-speed digital data buffering and routing

Procurement Notes

Verify the specific package variant against the datasheet, as the DL suffix denotes a Plastic Shrink Small-Outline (SSOP) package. Confirm RoHS compliance status and lead finish details via official manufacturer documentation before procurement. Ensure design compatibility with the specified 1.65-V to 3.6-V operating voltage range and thermal characteristics.

Selection Notes

Select this component for designs requiring 16-bit data buffering with integrated termination resistors. The inclusion of bus-hold circuitry simplifies board layout by removing external pull-up or pull-down requirements. Consider the SSOP-48 package constraints regarding pin pitch and thermal dissipation when evaluating PCB space limitations.

Part Context

This device belongs to the Texas Instruments Widebus family, designed for high-density digital interfacing. It implements the Enhanced-Performance Implanted CMOS (EPIC) submicron process technology. The SN74ALVCH162334 serves as a specialized solution for managing wide data buses in memory systems and high-performance computing architectures.

Replacement Considerations

Direct replacements include SN74ALVCH162334DGGR and SN74ALVCH162334VR. Verify package type compatibility, as these substitutes utilize TSSOP and TVSOP formats respectively instead of the SSOP configuration.

FAQ

How does the device handle floating data inputs?

The SN74ALVCH162334DLR incorporates active bus-hold circuitry on its data inputs. This feature automatically holds unused or floating inputs at a valid logic level, thereby eliminating the necessity for external pullup or pulldown resistors.

What is the function of the internal series resistors?

The output port contains equivalent 26-ohm series resistors. These are designed to reduce signal overshoot and undershoot during switching events, ensuring signal integrity without the requirement for external termination components.