SN74CBT6800DW

Overview

The SN74CBT6800DW is a 10-bit bus switch manufactured by Texas Instruments, housed in a 24-pin DW (Small-Outline) package. It operates on 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 and output levels with a maximum on-state resistance of 20 Ohms at VCC = 4 V. Propagation delay is specified at 0.25 ns under standard conditions. The B port includes precharging capabilities via a user-selectable bias voltage to minimize signal distortion during live insertion.

Feature Summary

• Provides ten bits of high-speed bidirectional bus switching with near-zero propagation delay.
• Features precharged outputs that connect the B port to a user-selectable bias voltage to minimize noise during live insertion.
• Supports TTL-compatible input and output voltage levels for broad logic interface compatibility.

Applications

• High-speed data bus switching applications requiring low latency.
• Live insertion systems where minimizing signal distortion upon connection is critical.
• Bidirectional data transfer between ports utilizing TTL-compatible logic levels.

Procurement Notes

Verify the specific ordering suffix 'DW' corresponds to the Small-Outline package variant when sourcing. Confirm the revision status of the datasheet SCDS005G, as product availability and specifications may change. Ensure the application environment remains within the recommended operating free-air temperature range of -40°C to 85°C. Validate that the supply voltage does not exceed the absolute maximum ratings to prevent permanent damage.

Selection Notes

Select this component when a single 10-bit switch configuration is required for bidirectional data paths. The DW package offers a compact footprint suitable for space-constrained designs compared to standard small-outline packages. Consider the precharge functionality if the design involves hot-plugging or live insertion scenarios to protect against signal integrity issues caused by transient noise.

Part Context

This part belongs to the SN74CBT6800 series of 10-bit bus switches. The family includes variants in DB (Plastic Shrink Small-Outline) and PW (Thin Shrink Small-Outline) packages, which share identical I/O pin counts and functionality while occupying less printed-circuit-board area. All variants are characterized for operation across the same industrial temperature range.

Replacement Considerations

Direct replacements include the SN74CBT6800DB and SN74CBT6800PW, which offer the same electrical performance and pinout in alternative package styles. Verify that any substitute maintains the 24-pin configuration and 10-bit architecture to ensure mechanical and functional compatibility.