SN74CB3T3245PWR

Overview

The SN74CB3T3245PWR is an octal bus switch manufactured by Texas Instruments, featuring a single 8-bit bidirectional data path. It operates within a supply voltage range of 2.3V to 3.6V and utilizes a 20-pin TSSOP package. The device incorporates a 5-V tolerant level shifter for interface compatibility. Key electrical characteristics include a maximum on-resistance of 8.5 ohms, a typical capacitance of 5 pF, and a bandwidth of 100 MHz. It supports continuous input/output currents up to 128 mA and functions reliably across an operating temperature range of -40°C to 85°C.

Feature Summary

• Provides bidirectional data transmission through a single 8-bit channel with low on-resistance for signal integrity.
• Integrates a 5-V tolerant level shifter to facilitate seamless interfacing between different voltage domains.
• Offers powered-off protection to prevent current leakage when the device is not energized.

Applications

• Portable equipment requiring low-voltage operation
• Consumer electronics utilizing multiple voltage levels
• Computing platforms needing high-speed data routing

Procurement Notes

Verify the specific suffix 'PWR' corresponds to the tape-and-reel packaging format rather than tube packaging. Confirm that the component meets RoHS compliance standards as indicated by the manufacturer's documentation. Ensure the ordering part number matches the exact logic family and package dimensions required for your PCB layout to avoid integration issues.

Selection Notes

Select this component when designing systems that require translation between 2.5-V or 3.3-V buses and 5-V tolerant interfaces. It is suitable for applications demanding low power consumption and high bandwidth. Consider the 20-TSSOP package constraints regarding thermal dissipation and board space availability during the schematic capture phase.

Part Context

This device belongs to the SN74CB3T3245 family of octal bus switches from Texas Instruments. It shares functional similarities with other members like the SN74CB3T3245PW but differs in packaging configuration. The family is designed for low-voltage applications where signal integrity and power efficiency are critical priorities.

Replacement Considerations

The SN74CB3T3245PWE4 serves as a verified lead-free replacement variant within the same product line. Ensure pinout compatibility and identical electrical specifications before substituting components in existing designs.