SN74ALVCH162836VR

Overview

The SN74ALVCH162836VR 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 supply voltage and utilizes an EPIC submicron CMOS process. The device features active bus-hold circuitry on data inputs, eliminating external pullup or pulldown resistors. Output ports include equivalent 26-Ω series resistors to reduce overshoot and undershoot. It is characterized for operation from -40°C to 85°C.

Feature Summary

• Integrated active bus-hold circuitry maintains valid logic levels on unused or floating data inputs without external components.
• Output ports incorporate internal equivalent series resistors to minimize signal overshoot and undershoot.
• Designed to comply with JEDEC SDRAM buffered DIMM specifications for high-speed memory applications.

Applications

• Buffered DIMM designs 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 specific package designation (GR) corresponds to the required tape-and-reel quantity of 2000 units. Confirm that the RoHS status and lead finish meet project environmental requirements. Ensure the operating temperature range aligns with system thermal constraints. Cross-reference the manufacturer part number against current availability lists to confirm production status.

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 the need for external damping components. Active bus-hold functionality reduces bill-of-materials complexity compared to standard drivers lacking this feature.

Part Context

This device belongs to the Texas Instruments Widebus family, designed for high-pin-count data transmission. It complements other ALVCH series drivers by offering 20-bit width in a 56-pin TSSOP package. The EPIC process ensures enhanced performance while maintaining compatibility with standard CMOS logic levels across the specified voltage range.

Replacement Considerations

SN74ALVCH162836GRG4

FAQ

How does the device handle floating data inputs?

Active bus-hold circuitry holds unused or floating data inputs at a valid logic level, removing the necessity for external pullup or pulldown resistors.

What is the function of the internal series resistors?

The output ports contain equivalent 26-Ω series resistors designed to reduce signal overshoot and undershoot during switching events.