SN74ALVCH16500DGGR

Overview

The SN74ALVCH16500DGGR is an 18-bit universal bus transceiver with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 1.65 V to 3.6 V and supports data flow in both directions controlled by OEAB, LEAB, CLKAB, OEBA, LEBA, and CLKBA inputs. The device integrates D-type latches and flip-flops for transparent, latched, or clocked modes. It features active bus-hold circuitry on data inputs to eliminate external pullup/pulldown resistors. The component is housed in a 56-pin TSSOP (DGG) package and is characterized for operation from -40 °C to +85 °C.

Feature Summary

• Combines D-type latches and flip-flops to support transparent, latched, or clocked operational modes
• Integrates active bus-hold circuitry on data inputs to maintain valid logic levels without external components
• Provides ESD protection exceeding 2000 V per MIL-STD-883 Method 3015

Applications

• High-density memory buffer applications
• Clock drivers and buffered oscillators
• Multiplexer / demultiplexer circuits

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current Package Option Addendum to confirm the exact physical package type and lead finish. Ensure that the selected variant matches the required thermal impedance and moisture sensitivity level for the intended assembly process. Cross-reference the datasheet revision date to confirm compatibility with current design specifications.

Selection Notes

Select this component when designing systems requiring bidirectional data transfer between 1.65-V and 3.6-V buses. The integrated latch and flip-flop functionality allows for flexible data storage and timing control. Consider the 56-pin TSSOP package constraints for PCB layout. Verify that the input transition rates remain within the specified limits to ensure proper signal integrity across the operating temperature range.

Part Context

This device belongs to the Texas Instruments Widebus family and utilizes the EPIC submicron CMOS process. It is part of the UBT (Universal Bus Transceiver) series, designed specifically for versatile bus interfacing tasks. The SN74ALVCH16500DGGR represents the Thin Shrink Small-Outline (DGG) package variant of the broader SN74ALVCH16500 product line.

Replacement Considerations

Check the SN74ALVCH16500DLR for the same functionality in a Plastic Shrink Small-Outline (DL) package. Verify pinout compatibility before substitution.