SN74CBT3244DWR

Overview

The SN74CBT3244DWR is an octal FET bus switch manufactured by Texas Instruments. It operates within a voltage range of 1.65 V to 3.6 V and features low on-resistance with matched pairs for minimal skew. The device supports bidirectional data transmission and includes an active pull-down resistor on the enable pin to prevent floating states. It is housed in a 20-pin TSSOP package suitable for surface-mount applications.

Feature Summary

• Octal configuration providing eight independent bidirectional switching channels
• Low on-resistance design ensures minimal signal attenuation across the bus
• Active pull-down on the enable pin maintains defined logic levels during power-up
• Supports mixed 1.8-V, 2.5-V, 3.3-V, and 5-V voltage domains

Applications

• Portable equipment requiring low-voltage operation
• Consumer electronics with mixed voltage domains
• Computing platforms utilizing high-speed data buses
• Telecommunications infrastructure components

Procurement Notes

Verify the specific suffix 'DWR' corresponds to the 20-pin TSSOP package and reel packaging format. Confirm RoHS compliance status and manufacturing date codes against current supply chain requirements. Ensure ESD handling procedures are followed during assembly due to CMOS sensitivity.

Selection Notes

Select this component when designing systems requiring bidirectional level shifting between different voltage domains. It is appropriate for applications needing low capacitance and fast switching speeds. Compare on-resistance specifications against other bus switches if signal integrity under heavy load is critical.

Part Context

This part belongs to the SN74CBT series of analog switches designed for high-speed digital applications. It complements other Texas Instruments logic families by providing efficient voltage translation capabilities. The device integrates multiple switches into a single compact package to reduce board space.

FAQ

Does the SN74CBT3244DWR support bidirectional data flow?

Yes, all eight channels are designed for bidirectional data transmission.

What is the function of the active pull-down on the enable pin?

It ensures the device remains disabled during power-up or reset conditions to prevent undefined states.