SN74CBT3245CDBQR

Overview

The SN74CBT3245CDBQR is an octal FET bus switch manufactured by Texas Instruments, housed in a 20-pin SSOP package. It operates within a supply voltage range of 4 V to 5.5 V and supports bidirectional data transmission across eight independent channels. The device features a maximum on-resistance of 12 ohms and a maximum propagation delay of 150 ps. It functions reliably within an operating temperature range of -40°C to +85°C.

Feature Summary

• Provides bidirectional data transfer capability for eight independent channels
• Includes undershoot protection to handle negative voltage excursions down to -2 V
• Offers powered-off protection to prevent current leakage when the device is unpowered

Applications

• High-speed data routing in portable equipment
• Clock distribution and buffering
• Memory module address and data bus switching

Procurement Notes

Verify the specific suffix 'Q' indicates automotive qualification requirements if applicable to your design. Confirm the package variant matches the required footprint, as other suffixes like 'R' denote different packaging options such as tape-and-reel. Ensure ESD handling protocols are followed due to moisture sensitivity classification.

Selection Notes

Select this component when an octal configuration with low on-resistance and high-speed switching is required. It is suitable for applications needing level shifting between 3.3-V and 5-V domains. Consider alternative packages like TSSOP or SOIC if pin pitch or board space constraints differ from the SSOP form factor.

Part Context

This part belongs to the SN74CBT3245C family of octal bus switches. It shares functional similarities with variants such as SN74CBT3245CPWR and SN74CBT3245CDBR, differing primarily in package type and manufacturing lot specifications. The series is designed for low-voltage digital logic applications requiring efficient signal path management.

Replacement Considerations

FST3245MTCX is listed as a similar substitute option.