SN74CBT3245CDBR

Overview

The SN74CBT3245CDBR is an octal FET bus switch manufactured by Texas Instruments, designed for bidirectional data transmission. It operates within a supply voltage range of 4 V to 5.5 V, with a typical operating voltage of 5 V. The device features a maximum on-resistance of 12 Ohms and a maximum propagation delay of 150 ps. It supports a maximum power supply current of 3 uA and functions reliably across an extended temperature range from -40°C to +85°C. Housed in a 20-pin SSOP package, this component integrates eight independent channels for efficient signal routing.

Feature Summary

• Provides bidirectional data transmission capability through eight independent FET channels.
• Features low on-resistance to minimize signal loss during active switching operations.
• Includes undershoot protection to safeguard against negative voltage transients.
• Operates with low power consumption suitable for energy-efficient digital systems.

Applications

• High-speed data bus switching in consumer electronics
• Signal routing in industrial control systems
• Data line management in telecommunications equipment

Procurement Notes

Verify the specific package variant, as the SN74CBT3245C series includes multiple housing options such as SSOP and TSSOP. Confirm that the required operating voltage aligns with the 4 V to 5.5 V specification range. Ensure compatibility with the intended temperature environment, specifically the -40°C to +85°C industrial grade. Check for moisture sensitivity level requirements if the design involves reflow soldering processes. Validate that the pin configuration matches the 20-SSOP footprint used in this specific part number.

Selection Notes

Select this component when an octal bus switch with low on-resistance and high-speed performance is required. It is suitable for applications needing bidirectional data flow between different voltage domains within the specified supply range. Consider this part for designs prioritizing low power consumption and robust transient protection. Ensure the PCB layout accommodates the 20-SSOP package dimensions. Verify that the system's signal integrity requirements are met by the 150 ps propagation delay characteristic.

Part Context

This device belongs to the SN74CBT3245C family of octal FET bus switches from Texas Instruments. It shares functional similarities with other members like the SN74CBT3245CPWR but differs in packaging. The family is characterized by low on-resistance and high-speed operation. This specific variant utilizes the SSOP form factor, distinguishing it from TSSOP or SOIC alternatives within the same logical product line.

Replacement Considerations

The SN74CBT3245CPWR serves as a direct alternative within the same family, offering identical electrical characteristics but housed in a 20-TSSOP package instead of SSOP. Designers must verify pinout compatibility and physical footprint differences before substitution. Other variants in the series may offer different packaging options while maintaining core functionality.