SN74CB3T3245PW

Overview

The SN74CB3T3245PW is an octal FET bus switch manufactured by Texas Instruments, featuring a single 8-bit bidirectional channel. It operates within a supply voltage range of 2.3V to 3.6V and utilizes a 20-pin TSSOP package. The device includes a 5-volt tolerant level shifter for signal path translation. Key electrical parameters include a maximum on-resistance of 5 ohms, a typical off-state capacitance of 5 pF, and a bandwidth of 100 MHz. It supports continuous input/output currents up to 128 mA with low supply current.

Feature Summary

• Provides bidirectional data transmission across eight independent channels
• Integrates a 5-volt tolerant level shifter for mixed-voltage system compatibility
• Offers powered-off protection to prevent leakage during power-down states

Applications

• Portable equipment requiring low-voltage operation
• Consumer electronics utilizing mixed voltage domains
• Computing and infotainment systems

Procurement Notes

Verify the specific suffix 'PW' corresponds to the TSSOP-20 package variant when sourcing. Confirm RoHS compliance status as indicated in official documentation. Ensure the operating temperature range meets the -40°C to 85°C requirement for the intended environment. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components.

Selection Notes

Select this component for applications requiring high-speed data transfer with low distortion. The low on-resistance ensures minimal signal attenuation. The 5V tolerance allows interfacing between 2.5V/3.3V logic and 5V peripherals without external level shifting circuitry. Consider the TSSOP package constraints for PCB layout and thermal management requirements.

Part Context

This device belongs to the SN74CB3T3245 family of octal bus switches. It is designed for low-voltage digital applications where signal integrity is critical. The CB3T series focuses on providing transparent switching with minimal impact on signal quality. It serves as a bridge between different voltage domains in complex electronic systems.

Replacement Considerations

SN74CB3T3245PWE4: Equivalent part with lead-free packaging designation.