MC33975ATEKR2

MC33975ATEKR2 is a multiple switch detection interface with suppressed wakeup is designed to detect the closing and opening of upto 22 switch contacts. The switch status, either open or closed, is transferred to the microprocessor unit (MCU) through a serial peripheral interface (SPI). The device also features a 22-to-1 analogue multiplexer for reading inputs as analogue. This device has two modes of operation, normal and sleep. normal mode allows programming of the device and supplies switch contacts with pull-up or pull-down current as it monitors the switch change of state. The sleep mode provides low quiescent current, which makes the device ideal for automotive and industrial products requiring low sleep state currents. Application includes automotive systems, industrial control systems, process control systems, security systems, systems requiring switch status verification for safety, operation, or process control purposes.

• Designed to operate from 5.5V <lt/> VPWR <lt/> 28V
• Switch input voltage range from -14V to 40V
• Interfaces to microprocessor using 3.3V/5V SPI protocol
• Selectable wake-up on change of state
• 14 switch-to-ground inputs
• 8 programmable inputs (switches to battery or ground)
• Selectable wetting current (32mA or 4mA for switch-to-ground inputs)
• Sleep state current VPWR 100µA, VDD 20µA
• VDD supply voltage range from -0.3 to 7.0VDC
• 32 SOICW-EP package, ambient temperature range from -40°C to 125°C