The 33996 is a 16-output low-side switch with a 24-bit serial input control. It is designed for a variety of applications including inductive, incandescent, and LED loads. The Serial Peripheral Interface (SPI) provides both input control and diagnostic readout. A Pulse Width Modulation (PWM) control input may be used to pulse width modulate multiple outputs at the same duty cycle. A dedicated reset input provides the ability to clear all internal registers to the Power-ON Reset state. The 33996 directly interfaces with microcontrollers and is compatible with both 3.3 V and 5.0 V CMOS logic levels. The 33996, in effect, serves as a bus expander and buffer with fault management features, reducing the MCU’s fault management burden.
Features
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RDS(ON) @ 25 degree C 0.55 Ohm
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Operating Voltage, VPWR 5.0 V – 27 v
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Operating Voltage, SOPWR 3.1 V – 5.5 V
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Outputs current limited (0.9 A) and voltage clamped (50 V) for switching incandescent and inductive loads
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Output independent overtemperature shutdown
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PWM-programmable outputs
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OFF open load detect current can be disabled for sensitive LED applications
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Output ON short-to-VBAT and OFF short-to-ground/open detection
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SPI diagnostic reporting