SN74CBT6800CDGVRE4

Overview

The SN74CBT6800CDGVRE4 is a 10-bit FET bus switch in a 24-pin TVSOP package. It operates with a supply voltage (VCC) ranging from 4 V to 5.5 V and supports data I/O levels from 0 V to 5.5 V. The device features low ON-state resistance (ron), typically 3 Ω at VCC = 4.5 V, and bidirectional data flow with near-zero propagation delay (tpd). It includes active undershoot protection on A and B ports up to -2 V and precharges the B port via a user-selectable bias voltage (BIASV) to minimize live-insertion noise.

Feature Summary

• Active undershoot-protection circuitry on A and B ports ensures proper OFF state during undershoot events up to -2 V.
• B-port outputs are precharged by a bias voltage (BIASV) to minimize signal distortion during live insertion and hot-plugging.
• Supports partial-power-down mode operation using Ioff feature to prevent damaging backflow current when powered down.
• Data and control inputs provide undershoot clamp diodes for enhanced signal integrity.

Applications

• PCI interface applications
• Memory interleaving systems
• Bus isolation circuits
• Low-distortion signal gating

Procurement Notes

Verify the ordering suffix 'E4' indicates lead-free status and RoHS compliance as per Texas Instruments documentation. Confirm the DGV package designation corresponds to the TVSOP-24 physical outline. Ensure the component matches the specific manufacturing lot traceability requirements for your assembly process. Cross-reference the datasheet revision date against your design specifications to confirm parameter consistency.

Selection Notes

Select this component when designing high-speed digital or analog interfaces requiring bidirectional data transfer between buses. The device is suitable for applications needing low on-resistance and minimal loading effects due to its low input/output capacitance. Consider the BIASV pin functionality if mitigating live-insertion glitches is critical for system stability. Ensure control inputs are compatible with TTL or 5-V/3.3-V CMOS logic levels.

Part Context

This part belongs to the SN74CBT6800C family of high-speed TTL-compatible FET bus switches. It is manufactured by Texas Instruments and falls under the Widebus family classification. The device is designed to replace older bus switching technologies by offering lower power consumption and improved signal integrity through advanced FET architecture and integrated protection features.

Replacement Considerations

Public confirmed substitute part numbers include SN74CBT6800CDGVR.

FAQ

How does the device handle live insertion?

The B port is precharged to a user-selectable bias voltage (BIASV) to minimize live-insertion noise and prevent glitches on the active bus.

What is the function of the Ioff feature?

The Ioff feature ensures that damaging current will not backflow through the device when it is powered down, supporting partial-power-down mode operation.