SN74CBTS6800DBR

Overview

The SN74CBTS6800DBR 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 TTL-compatible input levels and includes Schottky diodes on the I/Os to clamp undershoots up to -2 V. Key electrical parameters include a maximum on-state resistance of 20 Ohms at VCC = 4 V and 15 Ohms at VCC = 4.5 V. Propagation delay is specified as 0.35 ns at 4 V and 0.25 ns at 5 V with a 50 pF load.

Feature Summary

• Provides ten bits of high-speed bidirectional bus switching with near-zero propagation delay.
• Precharges the B port to a user-selectable bias voltage to minimize live-insertion noise.
• Integrates Schottky diodes on the I/Os to clamp signal undershoots for improved signal integrity.

Applications

• Connecting two ports via high-speed TTL-compatible bus switching
• Minimizing signal distortion during live insertion operations
• Clamping undershoots on digital signal lines

Procurement Notes

Verify the specific ordering suffix 'DBR' corresponds to the SSOP-24 tape and reel packaging configuration. Confirm that the component meets the required RoHS compliance standards and matches the intended thermal impedance specifications for the SSOP package type before final procurement.

Selection Notes

Select this component when a single 10-bit switch with a dedicated enable input is required. Ensure the application utilizes a control input voltage compatible with TTL levels (0.8 V to 2 V). Verify that the system can accommodate the specified bias voltage range relative to the supply voltage for optimal precharging performance.

Part Context

This part belongs to the SN74CBTS6800 series of 10-bit FET bus switches. It shares functional characteristics with other variants in the family, such as the SN74CBTS6800DWR and SN74CBTS6800PWR, differing primarily in the physical package style and manufacturing lot traceability rather than internal circuit topology.

Replacement Considerations

SN74CBTS6800DW

FAQ

How does the device handle live insertion?

The B port is precharged to a user-selectable bias voltage through an equivalent 10-kW resistor when the ON input is high or VCC is 0 V, which minimizes live-insertion noise.

What is the function of the Schottky diodes?

Schottky diodes are integrated on the I/Os to clamp undershoots up to -2 V, protecting the inputs and improving signal integrity.