The EMG4 is a digital transistor (Bias Resistor Transistor - BRT) manufactured by Rohm Semiconductor. It combines a transistor with integrated bias resistors, reducing external component count and simplifying circuit design. This PNP transistor is suitable for various switching applications that require controlled base current.

Applications

• Digital circuit control
• Inverter circuits
• Switching circuits
• Interface circuits
• Relay and LED driving

Features

• Built-in bias resistors (R1 = 4.7 kΩ)
• PNP Transistor
• Surface mount package (SOT-346)
• Reduces component count
• Simplifies circuit design

Benefits

• Simplified Design: Integrated resistors eliminate the need for external biasing resistors, simplifying board layout and reducing circuit size.
• Reduced Component Count: Fewer components lead to lower assembly costs and improved system reliability.
• Improved Performance: The integrated resistors are optimized for the transistor, ensuring consistent switching characteristics.
• Space Savings: The small SOT-346 package enables high-density board designs.
• Minimized Power Consumption: Appropriate resistor values help minimize power consumption in switching applications.

Additional Details

The EMG4 has a collector-emitter voltage (VCEO) of -50V and a collector current (IC) of -100mA. The power dissipation is approximately 200mW. It is typically available in a SOT-346 package. The input resistor (R1) is 4.7kΩ. The integrated resistor configuration provides a specific input current to output current ratio making it suitable for predictable switching behavior.