SN74CBT3245ADBR

Overview

The SN74CBT3245ADBR 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 an operating temperature from -40°C to 85°C. The device features TTL-compatible input levels with a high-level control voltage minimum of 2 V and a low-level maximum of 0.8 V. Electrical characteristics include a typical on-state resistance (Ron) of 5 Ω at VCC = 4.5 V and a maximum propagation delay (tpd) of 0.35 ns at VCC = 4 V. The component provides bidirectional data transfer between Port A and Port B controlled by the OE pin.

Feature Summary

• Provides eight bits of high-speed TTL-compatible bus switching functionality
• Features low on-state resistance for minimal signal path delay
• Standard '245-type pinout configuration across multiple packages

Applications

• Bidirectional data bus switching applications
• System-level power management requiring low insertion loss
• High-speed digital signal routing in consumer electronics

Procurement Notes

Verify the specific ordering suffix to confirm the package type and tape-and-reel quantity. Confirm RoHS compliance status and moisture sensitivity level ratings prior to assembly. Check current production status as parts may be designated as NRND or obsolete depending on the manufacturing date code. Ensure compatibility with existing PCB land patterns for the SSOP-20 footprint.

Selection Notes

Select this component when a standard '245 pinout is required for board layout compatibility. Choose based on the need for low on-resistance to maintain signal integrity at high speeds. Consider the 4 V to 5.5 V supply range suitability for the target system voltage. Verify that the 20-pin SSOP package dimensions fit the available space constraints.

Part Context

This part belongs to the SN74CBT3245A family of octal FET bus switches. The family includes variants in SOIC, TSSOP, TVSOP, and VQFN packages. The AD suffix indicates the SSOP package variant. These devices are designed to replace older logic families while offering improved speed and lower power consumption characteristics suitable for modern digital systems.

Replacement Considerations

SN74CBT3245ADWR is a compatible alternative in the SOIC-DW package.