The MMBT3640 transistor, manufactured by ON Semiconductor, is a PNP Bipolar Junction Transistor (BJT) designed for high-speed switching applications. It features a maximum transition frequency of 140 MHz, a collector current of 1A, an emitter current of 100mA, a collector-emitter voltage of 60V (VCEO), and a maximum collector current of 2A. Additionally, it has an operating temperature range of -55ºC to +150ºC, and a typical capacitance between collector and base of 3.9pF. Its low leakage current and fast switching high-frequency performance makes it ideal for switching applications in consumer electronics, automotive electronics, and audio applications.