SN74CBT3245APWR

Overview

The SN74CBT3245APWR is an octal FET bus switch manufactured by Texas Instruments, housed in a 20-pin TSSOP 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 provides eight bits of high-speed TTL-compatible bus switching with a maximum on-state resistance of 15 Ω at VCC = 5 V. Propagation delay is specified as 0.25 ns at VCC = 5 V. Continuous channel current capability reaches 128 mA.

Feature Summary

• Provides eight bits of high-speed bidirectional bus switching
• Features low on-state resistance for minimal propagation delay
• Maintains standard '245 device pinout across multiple packages

Applications

• High-speed data bus switching applications
• Portable equipment requiring low power consumption
• Battery-powered systems utilizing TTL-compatible logic levels

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and moisture sensitivity level. Confirm RoHS compliance status and lead finish details directly from the latest datasheet or package addendum before procurement. Ensure the selected variant matches the required thermal impedance and operating temperature range specifications.

Selection Notes

Select this component when a standard '245 pinout is required for an octal bus switch configuration. Consider the 4 V to 5.5 V supply voltage range and the 15 Ω maximum on-state resistance for signal integrity requirements. Evaluate the TSSOP package dimensions and thermal characteristics against the available board space and heat dissipation constraints of the target application.

Part Context

This part belongs to the SN74CBT3245A family of octal FET bus switches produced by Texas Instruments. The family includes various package options such as SOIC, SSOP, TVSOP, and VQFN. The APWR designation specifically identifies the TSSOP-20 package variant with tape and reel packaging, designed for surface-mount assembly processes.

Replacement Considerations

SN74CBT3245ADW (SOIC-20), SN74CBT3245ADBR (SSOP-20), SN74CBT3245ARGYR (VQFN-20)