SMUN2214T3G

Overview

The SMUN2214T3G is a Bipolar Resistor Transistor (BRT) manufactured by onsemi, designed to replace discrete transistor and resistor networks. It features an NPN configuration housed in a compact SOT-23 surface-mount package. The device integrates a monolithic bias network with a typical input resistance of 10 kOhms and a built-in bias resistor ratio of 4.7. Key electrical ratings include a maximum collector-emitter voltage (VCEO) of 50 V and a continuous collector current of 100 mA. The unit supports a wide operating temperature range from -55°C to +150°C with a power dissipation of 230 mW.

Feature Summary

• Integrates a single NPN transistor with a monolithic bias network consisting of series base and base-emitter resistors.
• Eliminates the need for external discrete components, thereby reducing board space and system cost.
• Provides simplified circuit design through pre-biased functionality within a standard three-pin surface-mount package.

Applications

• General-purpose switching applications requiring integrated biasing.
• Driver circuits for logic outputs where component count reduction is prioritized.
• Interface circuits between microcontrollers and peripheral devices.

Procurement Notes

Verify the specific suffix against official datasheets to confirm pinout and electrical characteristics, as variations exist within the BRT family. Ensure compatibility with automated assembly processes given the small outline package dimensions. Confirm RoHS compliance status through manufacturer documentation prior to integration into regulated products.

Selection Notes

Select this component when a fixed bias resistor ratio of approximately 4.7 is required for NPN switching applications. Compare against alternative BRT models if different resistance values or PNP polarity are needed. Validate that the 100 mA current rating and 50 V voltage limit meet the specific load requirements of the target circuit design.

Part Context

This part belongs to the MUN22xx series of Digital Transistors (BRTs) produced by onsemi. These devices are engineered to simplify designs by combining a transistor with internal bias resistors. The series offers various configurations to accommodate different logic levels and drive requirements while maintaining a consistent footprint for easy substitution.

Replacement Considerations

Direct substitutes include other BRTs with matching NPN polarity, similar voltage/current ratings, and comparable bias resistor ratios. Verify pinout alignment to ensure compatibility without PCB redesign. Consider thermal performance differences if operating near maximum temperature limits.