There are 12 devices, giving every combination of: package, NPN+NPN, NPN+PNP or PNP+PNP pairing and 1 or 2.2kΩ series current limiting resistor.
Every base also gets a 10kΩ pull-off resistor. “They include a second integrated resistor parallel to the base-emitter path to create a voltage divider that sets the base voltage. This offers finer tuning and better turn-off characteristic behaviour,” according to the company.
It describes the devices as a “cost-saving alternative to BC807 – BC817 series in digital applications”.
The packages are optimised for thermal performance – with a pair of heat transfer pads underneath – and can handle 1W total (730mW for one transistor) at 25°C in a four layer board with 1cm2 of copper on the collector. These derate linearly to nothing at 150°C.
Maximum collector-emitter voltages is 50V (open-base).
Picking the SOT1118 NPN+PNP 2.2kΩ PIMC32PA almost at random, gain is 70 minimum (5Vce, 50mA Ic, 25°C) and saturation is 100mV maximum (50mA Ic, 2.5mA Ib, 25°C). Collector capacitance is 5pF for the NPN and 7pF for the PNP, and transition frequency is 210 or 150MHz respectively.
Find the series product page here, and the PIMC32PA data sheet here
