SN74CBT6800ADW

Overview

The SN74CBT6800ADW is a 10-bit FET bus switch manufactured by Texas Instruments, housed in a 24-pin SOIC (DW) 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 provides bidirectional switching with near-zero propagation delay. Key electrical parameters include a maximum on-state resistance of 20 Ω at VCC = 4 V and a typical propagation delay of 0.35 ns at VCC = 4 V. The B port precharges to a user-selectable bias voltage via an equivalent 10-kΩ resistor when disabled.

Feature Summary

• Provides ten bits of high-speed TTL-compatible bus switching with low on-state resistance for bidirectional connections.
• Precharges the B port to a user-selectable bias voltage to minimize signal distortion during live insertion.
• Features a single enable input that controls the connection state between Port A and Port B.

Applications

• High-speed data bus routing
• Live insertion applications requiring minimized noise
• Bidirectional data transfer interfaces

Procurement Notes

Verify the specific ordering suffix 'DW' corresponds to the SOIC-24 tube packaging configuration. Confirm the component status as active production data per the manufacturer's documentation. 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 application environment.

Selection Notes

Select this component for designs requiring 10-bit wide bus switching with minimal propagation delay. The precharged output feature is critical for applications involving live insertion to reduce noise. Ensure control inputs are held at VCC or GND to prevent floating states. Verify that the load capacitance and current requirements fall within the absolute maximum ratings defined in the datasheet.

Part Context

This part belongs to the SN74CBT6800A series of 10-bit FET bus switches. It is functionally similar to other variants like the SN74CBTK6800 but includes specific precharge capabilities. The DW suffix indicates the standard SOIC package format, distinct from TSSOP or SSOP options available in the same family.

Replacement Considerations

Direct substitutes include SN74CBT6800APWR (TSSOP package) and SN74CBT6800ADBQ (SSOP package). Verify pinout compatibility and package dimensions before substitution. Other family members may lack the specific precharge functionality or have different pin configurations.

FAQ

How does the device handle live insertion?

When the ON input is high or VCC is 0 V, the B port is precharged to the BIASV level through an equivalent 10-kΩ resistor, minimizing signal distortion and noise during live insertion events.

What is the logic state when the ON input is high?

When the ON input is high, the switch between Port A and Port B is open (high impedance), and the B port is precharged to the BIASV voltage.