SN74CBTS6800DBQR

Overview

The SN74CBTS6800DBQR is a 10-bit FET bus switch manufactured by Texas Instruments, housed in a 24-pin SSOP package. It operates within a supply voltage range of 4 V to 5.5 V and supports an operating temperature from -40°C to +85°C. The device features Schottky diodes on the I/Os to clamp undershoots up to -2 V and precharges outputs via a bias voltage to minimize live-insertion noise. Key electrical parameters include a maximum on-state resistance of 20 Ohms at 4 V and a typical propagation delay of 0.25 ns at 5 V.

Feature Summary

• Provides bidirectional switching for ten bits with TTL-compatible input levels.
• Integrates Schottky diodes on inputs and outputs to clamp signal undershoots.
• Precharges B port to a user-selectable bias voltage to reduce live-insertion noise.

Applications

• High-speed data bus switching applications
• Live insertion systems requiring minimized noise
• TTL-to-CMOS level translation interfaces

Procurement Notes

Verify the specific DBQR suffix indicates the SSOP tape-and-reel packaging configuration. Confirm that the component meets RoHS compliance standards as specified in the manufacturer's documentation. Ensure the ordering part number matches the required package type and quantity specifications before finalizing procurement.

Selection Notes

Select this component when designing circuits requiring low propagation delay and high bandwidth for ten-bit data paths. Consider the device if the application demands Schottky clamping for signal integrity or requires configurable output precharging to handle live-insertion scenarios effectively.

Part Context

This device belongs to the SN74CBTS6800 family of digital bus switches. It is designed to provide high-speed, low-resistance connections between two ports while maintaining signal integrity through advanced clamping and precharging features suitable for demanding digital logic environments.

Replacement Considerations

SN74CBTS6800DWR (SOIC Tape & Reel)

FAQ

How does the device manage live-insertion noise?

The B port is precharged to a user-selectable bias voltage (BIASV) through an equivalent resistor when the switch is off, minimizing noise during live insertion.

What is the function of the Schottky diodes on the I/Os?

The integrated Schottky diodes clamp undershoots on the inputs and outputs up to -2 V, protecting the device and improving signal integrity.