SN74ALVCH162836GR

Overview

The SN74ALVCH162836GR is a 20-bit universal bus driver with 3-state outputs from the Texas Instruments Widebus family. It operates on a 1.65-V to 3.6-V VCC supply and utilizes an EPIC submicron CMOS process. The device features active bus-hold circuitry on data inputs, eliminating external pullup or pulldown resistors. Data flow from A to Y is controlled by the OE input, while LE and CLK inputs manage transparent and latched modes. The output port includes equivalent 26-Ω series resistors to reduce overshoot and undershoot.

Feature Summary

• Integrated 26-ohm series output resistors eliminate the need for external components to control signal integrity.
• Active bus-hold circuitry maintains valid logic levels on unused or floating data inputs without external pullup or pulldown resistors.
• Designed to comply with JEDEC SDRAM buffered DIMM specifications for high-speed memory applications.

Applications

• Buffered DIMMs compliant with JEDEC standards
• High-density memory systems requiring 20-bit data paths
• Universal bus drivers in low-voltage digital circuits

Procurement Notes

Verify the package marking ALVCH162836 and order code SN74ALVCH162836GR to confirm the TSSOP (DGG) variant. Ensure the component meets RoHS requirements and Level-1 moisture sensitivity ratings. Confirm that the operating temperature range of -40°C to 85°C aligns with system thermal constraints before finalizing procurement.

Selection Notes

Select this component when a 20-bit wide data path is required within the 1.65-V to 3.6-V voltage domain. The integrated series resistors simplify PCB layout by removing external damping components. Active bus-hold functionality reduces bill-of-materials complexity compared to standard drivers lacking internal holding circuits.

Part Context

This part belongs to the Texas Instruments Widebus family, designed for high-performance bus applications. It is manufactured using the EPIC submicron CMOS process technology. The GR suffix indicates the Thin Shrink Small-Outline (TSSOP/DGG) package with tape-and-reel packaging containing 2000 units per reel.

Replacement Considerations

SN74ALVCH162836GRG4 is a verified lead-free replacement variant within the same product line.

FAQ

How does the device handle floating data inputs?

The SN74ALVCH162836GR incorporates active bus-hold circuitry on all data inputs, which holds unused or floating inputs at a valid logic level without requiring external pullup or pulldown resistors.

What is the function of the internal series resistors?

The output port includes equivalent 26-Ω series resistors designed to reduce signal overshoot and undershoot, thereby improving signal integrity without the need for external resistive components.