SN74CBTS6800PWR

Overview

The SN74CBTS6800PWR is a 10-bit FET bus switch manufactured by Texas Instruments, housed in a 24-pin TSSOP 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. 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 with a maximum of 0.35 ns at VCC = 4 V and 0.25 ns at VCC = 5 V.

Feature Summary

• Provides ten bits of high-speed TTL-compatible bus switching with bidirectional signal paths.
• Integrates Schottky diodes on the I/Os to clamp undershoots up to -2 V for signal integrity.
• Precharges the B port to a user-selectable bias voltage (BIASV) to minimize live-insertion noise.

Applications

• High-speed data bus switching applications requiring low propagation delay.
• Systems utilizing live insertion where minimizing noise during connection is critical.
• TTL-compatible logic interfaces requiring bidirectional data transfer.

Procurement Notes

Verify the specific ordering suffix 'PWR' corresponds to the TSSOP-24 package and tape-and-reel packaging configuration. Confirm that the active production status aligns with current project requirements. Ensure compatibility with the required 4 V to 5.5 V supply voltage range and -40°C to +85°C operating temperature specifications before finalizing procurement.

Selection Notes

Select this component when a 10-bit wide bus switch with precharged outputs is required. It is suitable for designs needing Schottky clamping to handle undershoots without external components. Consider the low on-state resistance and minimal propagation delay for high-frequency signal routing. Verify that the single enable input architecture fits the control logic constraints of the target system design.

Part Context

This part belongs to the SN74CBTS6800 series of digital bus switches. It is designed as a general-purpose solution for connecting two ports with ten bits of data width. The device utilizes FET technology to achieve near-zero propagation delay while maintaining TTL-compatible input levels for broad logic family interoperability.

Replacement Considerations

Check for SN74CBTS6800DW or SN74CBTS6800DBR if alternative packages are needed. Verify pinout and functional equivalence before substituting with other 10-bit bus switches from different manufacturers.

FAQ

How does the device handle live insertion?

The B port is precharged to a user-selectable bias voltage (BIASV) through an equivalent 10-kΩ resistor when the switch is off, which minimizes live-insertion noise.

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.