The DTZTT1124A is a PNP Resistor-Equipped Transistor (RET) or Digital Transistor manufactured by Rohm Semiconductor. This device integrates a transistor and resistors into a single small SOT-346 package, simplifying circuit design and reducing component count. It is designed for use in a variety of switching applications, primarily where a low input current is used to control a higher current load.

Applications

• General purpose switching
• Inverter circuits
• Load driving
• Digital logic control
• Interface between digital circuits and discrete components

Features

• PNP Transistor: Suitable for use in applications requiring a PNP transistor.
• Built-in bias resistors: Simplifies circuit design.
• Compact SOT-346 package: Saves board space.
• R1 = 2.2 kΩ (Input Resistor)
• R2 = 10 kΩ (Bias Resistor)

Benefits

• Reduced component count: Simplifies PCB layout and reduces assembly costs.
• Improved circuit reliability: Fewer external components mean fewer potential failure points.
• Space-saving design: Allows for high-density mounting.
• Simplified design process: Integrated resistors eliminate the need to select external resistor values.

Additional Details

The DTZTT1124A features a PNP transistor with integrated bias resistors. The input resistor (R1) is 2.2 kΩ, and the bias resistor (R2) is 10 kΩ. The SOT-346 package is suited for automated assembly. The device is RoHS compliant. This part offers a good balance between switching speed and power consumption in low to medium-speed switching applications. The power dissipation is generally around 200mW. It is designed to be controlled by a digital signal, where the input current is used to switch the transistor on or off. The part number DTZTT1124A indicates tape and reel packaging.