The 33879 is an 8-output hardware-configurable, high-side/low-side switch with 16-bit serial input control. Two of the outputs may be controlled directly via microprocessor for PWM applications. The 33879 incorporates SMARTMOS technology, with CMOS logic, bipolar/MOS analog circuitry, and DMOS power MOSFETs. The 33879 controls various inductive, incandescent, or LED loads by directly interfacing with a microcontroller. The circuit’s innovative monitoring and protection features include very low standby currents, cascade fault reporting, internal +45 V clamp voltage for low-side configuration, -20 V high-side configuration, output-specific diagnostics, and independent overtemperature protection.
The MC33879 is an 8-output hardware-configurable high-side/low-side switch featuring 16-bit serial input control. It incorporates SMARTMOS technology to interface directly with microcontrollers, allowing the control of various inductive, incandescent, or LED loads.
Key features include very low standby currents, cascade fault reporting, internal clamp voltages for protection during inductive switching, and independent overtemperature protection. The device supports PWM applications via two outputs controlled directly by a microprocessor.
| Supply Voltage Range (Vpwr) | 5.5 V to 26.5 V |
|---|---|
| Logic Supply Voltage (Vpp) | 3.1 V to 5.5 V |
| Output Self Limiting Current | 0.5 A to 1.0 A |
| Operating Case Temperature Range | -40°C to 125°C |
| Output Clamp Voltage (Low Side) | +45 V |
The typical on-resistance is 1.0 Ω at 25°C.
Yes, Motorola offers Pb-Free Packaging with the EK suffix.