The M54561P is a seven-circuit output sourcing Darlington transistor array. The circuits are made of PNP and NPN transistors. Both the semiconductor integrated circuits perform high-current driving with extremely low input-current supply.
The M54561P is a seven‑circuit Darlington transistor array that provides high‑current sourcing with built‑in clamping diodes. Each circuit uses a PNP/NPN pair and includes a 20 kΩ resistor between the base and input pin, allowing up to 300 mA per output.
The device is intended for driving relays, printers, LEDs, fluorescent tubes, lamps, and for interfacing MOS‑bipolar logic with relays, solenoids, or small motors. Detailed electrical, switching, and thermal characteristics are provided, including absolute maximum ratings and recommended operating conditions.
| Supply voltage (Vs) | 40 V |
|---|---|
| Clamping diode forward current (IF) | -300 mA |
| Clamping diode reverse voltage (VR) | 40 V |
| Operating temperature (Ta) | -20 °C to +75 °C |
| Storage temperature (Tstg) | -55 °C to +125 °C |
| Turn‑on time (t_on) | 200 ns |
| Turn‑off time (t_off) | 2500 ns |
It operates from -20 °C up to +75 °C.
It is used to drive relays, printers, LEDs, fluorescent display tubes, lamps, and as an interface between MOS‑bipolar logic systems and relays, solenoids, or small motors.