Motorola Debuts MC33993 Switch Detection IC

Motorola Inc. (Austin, TX) debuted its new MC33993 multiple switch detection interface IC from Motorola's Semiconductor Products Sector, which enables designers of multi-voltage embedded systems to eliminate discrete and standard linear ICs that will enable low-pin count microcontrollers. The device is designed to allow logic-level microcontrollers (MCUs) to directly interface with system voltages from -14V to 26V, enabling it to be used in automotive, industrial and commercial applications.

Available as a 32-lead SOIC, the chip interfaces with an MCU through a four-pin SPI to increase MCU I/O signals by more than five times. Also, by using the analog multiplex feature of the device, up to 22 analog signals may be sent to one MCU ADC input. Manufactured using the company's SMARTMOS process, the MC33993 provides 16mA of output current and has a sleep mode for low-current consumption. It also has a timer for wake-up functions and is protected against ESD of up to 2.5kV.