SN74CBT3245ADW

Overview

The SN74CBT3245ADW is an octal FET bus switch manufactured by Texas Instruments, housed in a 20-pin SOIC (DW) 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 standard '245-type pinout. Key electrical characteristics include a maximum on-state resistance of 7 Ω at VCC = 4.5 V, a propagation delay of 0.25 ns at VCC = 5 V, and a continuous channel current rating of 128 mA.

Feature Summary

• Provides eight bits of high-speed TTL-compatible 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 systems requiring low power consumption
• Battery-powered consumer electronics

Procurement Notes

Verify the specific ordering suffix to confirm the package type and tape-and-reel versus tube packaging configuration. Confirm RoHS compliance status and moisture sensitivity level ratings prior to procurement. Ensure that the selected variant matches the required operating temperature range and lead finish specifications for the intended assembly process.

Selection Notes

Select this component when a standard '245 pinout is required for an octal bus switch application. The device is suitable for designs needing low on-resistance and fast switching speeds within a 5 V logic environment. Consider alternative package options such as SSOP or TSSOP if space constraints differ from the SOIC footprint requirements.

Part Context

This part belongs to the SN74CBT3245A family of octal FET bus switches. The family includes variants with different package types including SSOP, TSSOP, TVSOP, and QFN. All members share the same functional description and pinout but vary in physical dimensions and thermal characteristics.

Replacement Considerations

Direct substitutes within the same family include SN74CBT3245ADBR (SSOP), SN74CBT3245APW (TSSOP), and SN74CBT3245ADGVR (TVSOP). These parts maintain identical functionality and pinouts while offering different package geometries.