SN74CBTLV16800VR

Overview

The SN74CBTLV16800VR is a low-voltage 20-bit FET bus switch from the Widebus family, housed in a 48-pin TVSOP (DGV) package. It operates within a supply voltage range of 2.3 V to 3.6 V and supports an operating temperature range of -40°C to +85°C. The device features a typical on-state resistance of 5 Ω at 3.3 V and provides rail-to-rail switching on data I/O ports. It includes precharged B-port outputs via a user-selectable bias voltage to minimize live-insertion noise.

Feature Summary

• Supports partial-power-down mode operation through the Ioff feature to prevent damaging backflow current when powered down.
• Precharges B-port outputs to a user-selectable bias voltage to minimize signal distortion during live insertion.
• Provides high-speed bus switching with low on-state resistance for minimal propagation delay.

Applications

• High-speed bus switching applications
• Partial-power-down systems requiring isolation during power off
• Live insertion environments minimizing signal distortion

Procurement Notes

Verify the specific ordering suffix VR corresponds to the TVSOP-48 package and tape-and-reel carrier configuration. Confirm that the required lead finish matches the NIPDAU specification listed in the packaging addendum. Ensure the design accommodates the specified moisture sensitivity level and peak reflow temperature limits for surface-mount assembly.

Selection Notes

Select this component for designs requiring a single 20-bit or dual 10-bit bus switch solution. It is suitable for low-voltage logic families operating between 2.3 V and 3.6 V. Consider the TVSOP-48 package dimensions if board space constraints require a thin-profile surface-mount footprint. Verify that the control inputs can be pulled up to VCC to ensure high-impedance states during power transitions.

Part Context

This part belongs to the Texas Instruments Widebus family of low-voltage bus switches. It is functionally similar to other devices in the CBTLV series but offers a higher channel count in a single package. The VR suffix specifically denotes the TVSOP-48 plastic small-outline package variant manufactured by Texas Instruments.

Replacement Considerations

SN74CBTLV16800DLR

FAQ

How does the device handle live insertion?

The B-port outputs are precharged to a user-selectable bias voltage (BIASV) to minimize signal distortion and noise during live insertion events.

What is the purpose of the Ioff feature?

The Ioff feature ensures that damaging current will not backflow through the device when it is powered down, supporting partial-power-down applications.