MAX13036 Datasheet, PDF (1/18 Pages) Maxim Integrated Products – Automotive Contact Monitor and Level Shifter

19-0808; Rev 0; 4/07
EVAALVUAAILTAIOBNLEKIT
Automotive Contact Monitor
and Level Shifter
General Description
The MAX13036 automotive contact monitor and level
shifter monitors and debounces eight remote mechanical
switches and asserts an interrupt (INT) if a switch
changes state. The state of each switch is sampled
through an SPI™ interface by reading the status register
and any switch can be prohibited from asserting an inter-
rupt by writing to the command register. Four of the
switch inputs are intended for ground-connected switch-
es (IN0–IN3), and the other four inputs (IN4–IN7), are
programmable in groups of two for either ground-con-
nected 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 MAX13036 supplies an adjustable wetting current to
each closed switch to clean mechanical switch contacts
that are exposed to adverse conditions.
The MAX13036 operates with a +6V to +26V battery volt-
age applied to BAT. A separate +2.7V to +5.5V logic sup-
ply input (V_L) sets the interface voltage. The MAX13036 is
available in a 5mm x 5mm 28-pin TQFN package and
operates over the -40°C to +125°C temperature range.
Body Computers
Window Lifters
Seat Movers
Applications
Electric Sunroofs
Other Control ECUs
Pin Configuration
TOP VIEW
DO0 22
*EP
SD 23
GND 24
BATREF 25
BAT 26
N.C. 27
INO 28 ⁺
MAX13036
14 INT
13 OT
12 GND
11 TDEB
10 WET
9 HYST
8 N.C.
Features
o +6V to +26V Operating Voltage Range
o +42V Compatibility on BAT
o Inputs Withstand Reverse Battery
o Withstands Dynamic Battery Voltage Drop While
V_L is Present
o Ultra-Low Operating Current 17µA (typ) in
Scan Mode
o Resistor-Adjustable Switching Hysteresis
o CMOS-Compatible Logic Outputs (+2.7V min)
o Built-In Switch Debouncing
o Interrupt Output
o Immunity to Transients
o High Modularity
o Thermal Protection
o ±8kV HBM ESD Protection on IN0–IN7 Without
External Components
o Two Inputs (IN0, IN1) Programmable as Direct
Outputs
o Four Inputs (IN4–IN7) Programmable for BAT or
GND Related Switches
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX13036ATI+
-40°C to +125°C
28 TQFN-EP*
(5mm x 5mm)
T2855-8
+ Denotes lead-free package.
*EP = Exposed paddle.
Typical Application Circuit appears at end of data sheet.
TQFN
*CONNECT EXPOSED PADDLE TO GROUND
SPI is a trademark of Motorola, Inc.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.