NCT3940S-A TR

Overview

The NCT3940S-A TR is a fully integrated DC motor driver manufactured by Nuvoton Technology Corporation. It utilizes PMOS technology and features an open/switch interface for control. Designed for brushed DC motors, the device operates within a supply voltage range of 4.5V to 5.5V and supports a load voltage of the same range. The output current capability is rated at 500mA with a high-side output configuration. It is housed in an 8-SOIC package (8-SOP) with a width of 3.90mm. The component functions as a complete driver including control and power stages. It is specified for operation across a temperature range of -40°C to 125°C TJ.

Feature Summary

• Fully integrated driver combining control logic and power stages for simplified design
• High-side output configuration utilizing PMOS technology
• Open/switch interface for straightforward digital control

Applications

• Brushed DC motor control applications
• General purpose motor driving circuits
• Embedded systems requiring simple motor actuation

Procurement Notes

This product is officially listed as obsolete or discontinued by the manufacturer. Verification of availability should focus on surplus distributors or secondary market sources rather than standard manufacturing channels. Confirm the specific suffix 'TR' indicates tape and reel packaging when sourcing from alternative suppliers. Ensure compatibility with existing PCB footprints for the 8-SOP package before procurement.

Selection Notes

Select this component for applications requiring a simple, single-channel brushed DC motor driver with low voltage operation between 4.5V and 5.5V. It is suitable for designs needing a high-side switch configuration without external discrete MOSFETs. Consider the 500mA output limit and the specific 8-SOP package dimensions during layout. Verify that the open/switch interface aligns with the system's control logic levels.

Part Context

The NCT3940S-A belongs to the NCT3940 series of motor drivers from Nuvoton. It is part of a family that includes variants like the NCT3941, which differs in voltage range and output configuration. This specific model targets low-voltage, general-purpose brushed DC motor applications where integration and simplicity are prioritized over high-power handling.

Replacement Considerations

NCT3941S-A TR is documented as a parameter equivalent substitute.