PMBT3904 NPN General Purpose Transistor SMD SOT-23 3M9 On-card switching regulators

On-card switching regulators

5V Product Type 8-bit Microcontroller Mounting SMD/SMT Maximum Clock Frequency 20 MHz Pin Count 32 General Purpose I/O Pins 27 SPI 2 TWI (I2C) 2 USART 2 PTC Available Clock Failure Detector Available Output Compare Modulator Available

Built-in over-voltage/short circuit monitor

Open-collectors

The resistor has a low tolerance of only 5%

PMBT3904 NPN General Purpose Transistor SMD SOT-23 3M9 On-card switching regulatorsPMBT3904 is a general purpose semiconductor device that may be used to amplify, switch, or control a signal or power. Because the PMBT3904 is an NPN transistor, we must apply a little amount of positive voltage to the transistor's base via a current limiting resistor known as an RB (Base Resistor). When the proper amount of current passes through the transistor's base, the transistor will switch on. The PMBT3904 NPN transistor is packaged in a tiny