SN74CBT6800PWR

Overview

The SN74CBT6800PWR is a 10-bit bus switch IC manufactured by Texas Instruments, housed in a TSSOP-24 package. It operates on a supply voltage (VCC) ranging from 4 V to 5.5 V and supports an operating temperature range of -40°C to +85°C. The device features a maximum on-state resistance of 20 Ohms at VCC = 4 V and 7 Ohms at VCC = 5 V. Propagation delay is specified at a maximum of 250 ps under standard conditions.

Feature Summary

• Provides ten bits of high-speed TTL-compatible bus switching with bidirectional data flow capabilities.
• Precharges the B port to a user-selectable bias voltage to minimize signal distortion during live insertion.
• Features low on-state resistance for near-zero propagation delay connections between ports.

Applications

• High-speed digital bus switching applications requiring TTL compatibility.
• Live insertion systems where minimizing noise during connection is critical.
• Bidirectional data routing in electronic circuits.

Procurement Notes

Verify the specific package variant, as the datasheet lists DB, DW, and PW options. Confirm that the PWR suffix corresponds to the Thin Shrink Small-Outline (PW) package with tape-and-reel packaging. Ensure the application environment stays within the recommended 4 V to 5.5 V supply voltage and -40°C to +85°C temperature range for reliable operation.

Selection Notes

Select this component when a 10-bit wide bus switch is required with precharge functionality for live insertion scenarios. It is suitable for designs needing TTL-compatible input and output levels. Consider the TSSOP-24 footprint if space efficiency is a priority compared to standard small-outline packages.

Part Context

This device belongs to the SN74CBT6800 series of bus switches. It is characterized for industrial temperature ranges and offers the same I/O pin count and functionality as standard small-outline packages but in less than half the printed-circuit-board area. The 'PWR' designation indicates the specific thin shrink small-outline package and reel packaging format.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.

FAQ

How does the device handle live insertion?

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

What is the function of the ON input?

When ON is low, Port A is connected to Port B. When ON is high, the switch opens and the B port precharges to BIASV.