SN74CB3T3245DBQR

Overview

The SN74CB3T3245DBQR is an octal FET bus switch manufactured by Texas Instruments. It features a single 8-bit bidirectional data path with low on-resistance and fast propagation delay. The device operates within a supply voltage range of 2.3V to 3.6V, making it suitable for low-voltage applications. It is housed in a 20-pin TSSOP package and supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Provides an octal (8-bit) bidirectional bus switching configuration for efficient signal routing.
• Features powered-off protection to prevent high leakage currents when the device is unpowered.
• Includes level-shifting capabilities allowing operation between lower voltage domains and 5V-tolerant interfaces.

Applications

• Low-voltage bus architecture interconnects
• Signal path translation between different voltage domains
• Portable equipment requiring power conservation

Procurement Notes

Verify the specific suffix 'DBQR' corresponds to the TSSOP-20 package and reel packaging configuration. Confirm that the 2.3V to 3.6V supply range aligns with the target system's power rails. Ensure moisture sensitivity level handling procedures are followed during assembly.

Selection Notes

Select this component when an octal bus switch is required for 2.5V or 3.3V systems interfacing with 5V tolerant nodes. The integrated level shifter simplifies design compared to standard switches lacking this feature. Verify pinout compatibility with existing PCB layouts against similar family members.

Part Context

This part belongs to the SN74CB3T3245 series of low-voltage bus switches. It shares functional similarities with other devices in the CB3T family but is distinguished by its specific voltage tolerance and level-shifting characteristics designed for mixed-voltage environments.

Replacement Considerations

Public confirmed substitute part numbers: SN74CBT3245CDBQR, SN74CBT3245CDBR.