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MAX13038

Maxim Integrated Products
Part Number MAX13038
Manufacturer Maxim Integrated Products
Description (MAX13037 / MAX13038) Automotive Contact Monitor and Level Shifters
Published Jan 19, 2008
Detailed Description www.DataSheet4U.com 19-1084; Rev 0; 11/07 Automotive Contact Monitor and Level Shifters with LDO Regulator General Desc...
Datasheet PDF File MAX13038 PDF File

MAX13038
MAX13038

Overview
www.
DataSheet4U.
com 19-1084; Rev 0; 11/07 Automotive Contact Monitor and Level Shifters with LDO Regulator General 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 command 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 150mA 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 Compatibility on BAT o Switch Inputs Withstand Reverse Battery o 150mA 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 Tr...


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