MAX13037 Datasheet | Maxim Integrated

Description The MAX13037/MAX13038 automotive contact monitor and level shifters monitor and debounce eight remote mechanical switches and assert an interrupt (INT) if a switch changes state. The state of each switch is sampled through an SPI™ interface by reading the status register. Any switch can be prohibited from asserting an interrupt by writing to the mand register. Four of the switch inputs are intended for ground-connected switches (IN0- IN3) and the other four inputs (IN4- IN7) are programmable in groups of two for either groundconnected or battery-connected switches. Two switch inputs (IN0, IN1) have direct level-shifted outputs (DO0, DO1) to be used for PWM or other timing-based signals. Switch input thresholds are set to 50% of the voltage applied to BATREF. The threshold hysteresis is set by connecting an external resistor from HYST to ground. The MAX13037/MAX13038 supply an adjustable wetting current to each closed switch to clean mechanical switch contacts that are exposed to adverse conditions. The MAX13037/MAX13038 feature a low dropout (LDO) linear regulator capable of supplying up to 150m A of current. The MAX13037 LDO has an output voltage of +5V, whereas the MAX13038 has an output voltage of +3.3V. The MAX13037/MAX13038 also feature a watchdog timer and an open-drain reset output with adjustable timing. The MAX13037/MAX13038 operate with a +6V to +26V battery voltage applied to BAT. The MAX13037/ MAX13038 are available in a 6mm x 6mm, 36-pin TQFN package and operate over the automotive -40°C to +125°C temperature range. o +42V patibility on BAT o Switch Inputs Withstand Reverse Battery o 150m A LDO, +5V (MAX13037) or +3.3V (MAX13038) o Ultra-Low Operating Current 28µA (typ) in 64ms Scan Mode with LDO ON o Resistor Adjustable Switching Hysteresis o Watchdog and Reset o Built-In Switch Debouncing o Interrupt Output o Immunity to Transients o High Modularity o Thermal Protection o ±8k V HBM ESD Protection on IN0- IN7 Without External ponents o Two...