SN74CBT6800ADBQR

Overview

The SN74CBT6800ADBQR is a 10-bit FET bus switch manufactured by Texas Instruments, housed in a 24-pin SSOP (DBQ) 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 a BIASV pin for precharging outputs to minimize live-insertion noise. On-state resistance ranges from 3 Ω to 20 Ω depending on conditions, with propagation delays as low as 0.25 ns at 5 V.

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 signal distortion during live insertion.
• Features TTL-compatible input levels and low on-state resistance for efficient data transmission.

Applications

• High-speed digital bus switching applications requiring low distortion.
• Systems utilizing live insertion where output precharging is necessary to prevent noise.
• Bidirectional data path connections between ports A and B controlled by a single enable input.

Procurement Notes

Verify the specific ordering suffix 'DBQ' corresponds to the SSOP package type required for your design. Confirm that the component status remains active or check for end-of-life notifications prior to finalizing procurement plans. Ensure compatibility with the specified 4 V to 5.5 V supply voltage range and -40°C to +85°C operating temperature limits for your target environment.

Selection Notes

Select this component when a 10-bit wide bus switch with precharged outputs is required. It is suitable for designs needing TTL-compatible control signals and low on-state resistance. Consider the 24-pin SSOP package constraints and ensure the BIASV pin can be properly biased to achieve the desired live-insertion performance characteristics.

Part Context

This part belongs to the SN74CBT6800A family of 10-bit FET bus switches. It shares functional similarities with other variants like the SN74CBTK6800 but differs in packaging and specific electrical characteristics such as the inclusion of the BIASV pin for precharging. The DBQ suffix specifically denotes the SSOP package option within the broader product line.

Replacement Considerations

Direct substitutes include other SN74CBT6800A variants with different packages, such as SN74CBT6800ADW (SOIC) or SN74CBT6800APWR (TSSOP), provided the pinout and package dimensions are compatible with the existing PCB layout.

FAQ

How does the BIASV pin function?

The BIASV pin allows the user to select a bias voltage that precharges the B port when the switch is off, minimizing live-insertion noise and signal distortion.

What is the maximum supply voltage?

The maximum recommended supply voltage (VCC) is 5.5 V.