Design Files
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The 33993 is designed to independently monitor the OPEN/CLOSE status of up to 22 switches. Eight programmable sense inputs verify a connection to ground or VBAT while 14 additional programmable inputs verify a connection to ground only.
A 22:1 analog multiplexer is incorporated to read input analog voltages. The 33993 interfaces to a microcontroller via 3.3/5.0 V SPI protocol. Whenever a switch changes state, the microcontroller is automatically alerted.
A Sleep mode provides a low quiescent current for critical power conservative applications. The Normal mode accommodates programming; e.g., pull-up or pull-down contact detection currents, contact wetting current, wetting current time, Interrupt time, AMUX.
Receive the full breakdown. See the product footprint and more in the eCad file.
Receive the full breakdown. See the product footprint and more in the eCad file.