This is a Motorola small signal transistor with monolithic bias resistor network, which can reduce system cost and board space.
This document describes the MMUN2111LT1 series of Bias Resistor Transistors (BRTs), which are PNP silicon surface mount devices designed to replace a single transistor and its external resistor bias network. By integrating a series base resistor and a base-emitter resistor into a single device, this series simplifies circuit design, reduces board space, and lowers component count. The devices are housed in the SOT-23 package, suitable for low power surface mount applications.
| Collector-Base Voltage | 50 V |
|---|---|
| Collector-Emitter Voltage | 50 V |
| Collector Current | 100 mA |
| Total Power Dissipation | 200 mW |
| Thermal Resistance Junction-to-Ambient | 625 °C/W |
| Operating Temperature Range | -65 to +150 °C |
| Package Type | SOT-23 |
The BRT contains a single transistor with a monolithic bias network consisting of two resistors to eliminate individual components.
Using a BRT simplifies circuit design, reduces board space, and reduces component count.
The maximum temperature for soldering purposes is 260°C for 10 seconds.