CD1030 Datasheet | NXP Semiconductors

33-channel multiple switch detection interface with programmable wetting current Rev. 6.0 - 20 August 2024 Product data sheet 1 General description The CD1030 is designed to detect the closing and opening of up to 33 switch contacts. The switch status, either open or closed, is transferred to the microprocessor unit (MCU) through a serial peripheral interface (SPI). This SMARTMOS device also Features a 35-to-1 analog multiplexer for reading the input channels as analog inputs. The analog selected input signal is buffered and provided on the AMUX output pin for the MCU to read. Independent programmable wetting currents are available as needed for the application. A battery and temperature monitor are included in the IC and available via the AMUX pin. The CD1030 device has several modes of operation: Normal mode, Low-power mode (LPM), and Polling mode. Normal mode allows programming of the device and supplies switch contacts with pullup or pulldown current as it monitors the change of state on the switches. The LPM provides low quiescent current, which makes the CD1030 ideal for automotive and industrial products requiring low sleep-state currents. Polling mode periodically interrogates the input pins to determine the state the pins are in, and to decide whether there was a change of state from Normal mode. NXP Semiconductors 33-channel multiple switch detection interface with programmable wetting current 2 Features and benefits - Fully functional operation from 4.5 V to 36 V - Full parametric operation from 6.0 V to 28 V - Low-power mode current IBATP = 50 μA and IDDQ = 10 μA - 33 switch detection channels - 21 switch-to-Ground (SG) inputs with configurable pull-up current sources - 12 programmable switch (SP) inputs - Switch-to-Ground (SG) or Switch-to-Battery (SB) - Operating switch input voltage range from -1.0 V to 36 V - Selectable wetting current (2.0, 6.0, 8.0, 10, 12, 14, 16, or 20 m A) - Programmable wetting operation (Pulse or...