SN74ALVCH16500DLR

Overview

The SN74ALVCH16500DLR 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 rates up to 150 MHz. The device utilizes the EPIC submicron process and features active bus-hold circuitry on data inputs. It is housed in a 56-pin SSOP (DL) package and is characterized for operation from -40 °C to +85 °C.

Feature Summary

• Combines D-type latches and D-type flip-flops for transparent, latched, or clocked modes
• Active bus-hold circuitry eliminates the need for external pullup/pulldown resistors
• ESD protection exceeds 2000 V per MIL-STD-883, Method 3015

Applications

• High-density data acquisition systems
• Mobile applications requiring low power consumption
• Consumer products utilizing battery power
• Portable equipment with strict space constraints

Procurement Notes

Verify the specific ordering suffix 'DLR' corresponds to the tape-and-reel packaging format containing 1000 units per reel. Confirm that the component status remains listed as Active Production. Ensure the selected package matches the 56-pin SSOP physical dimensions required for the target PCB layout.

Selection Notes

Select this component when designing circuits requiring simultaneous latch and flip-flop functionality within a single transceiver. It is suitable for applications needing flexible data flow control via OEAB, LEAB, and CLKAB inputs. Consider its low static power consumption and wide operating voltage range for portable designs.

Part Context

This part belongs to the Texas Instruments Widebus family and is built using the Enhanced-Performance Implanted CMOS (EPIC) submicron process. It is categorized under Universal Bus Transceivers (UBT), providing a versatile solution for managing bidirectional data transfer across multiple channels efficiently.

Replacement Considerations

Direct replacement options include the SN74ALVCH16500DGGR. Verify pinout compatibility and ensure the alternative package type meets the thermal and mechanical requirements of the existing design.

FAQ

How does the device handle unused or floating data inputs?

The SN74ALVCH16500DLR includes active bus-hold circuitry on all data inputs, which maintains unused or floating pins at a valid logic level without requiring external resistors.

What controls the direction of data flow between ports A and B?

Data flow direction is controlled by the output-enable inputs OEAB and OEBA. OEAB is active high for A-to-B flow, while OEBA is active low for B-to-A flow.