MAX13036 Datasheet, PDF (8/18 Pages) Maxim Integrated Products – Automotive Contact Monitor and Level Shifter

Automotive Contact Monitor
and Level Shifter
Pin Description
PIN
1
2
3
4
5
6
7
8, 20, 27
9
10
11
12, 24
13
14
15
16
17
18
19
21
22
23
25
26
28
—
NAME
IN1
IN2
IN3
IN4
IN5
IN6
IN7
N.C.
HYST
WET
TDEB
GND
OT
INT
CS
SDO
SDI
CLK
V_L
DO1
DO0
SD
BATREF
BAT
IN0
EP
FUNCTION
Switch Input Channel 1. Connect IN1 to a switch connected to GND. IN1 can be programmed as a direct
input with a level-shifted output on DO1 (see the Mechanical Switch Inputs (IN0–IN7) section).
Switch Input Channel 2. Connect IN2 to a switch connected to GND.
Switch Input Channel 3. Connect IN3 to a switch connected to GND.
Switch Input Channel 4. Connect IN4 to a switch connected to GND or BAT.
Switch Input Channel 5. Connect IN5 to a switch connected to GND or BAT.
Switch Input Channel 6. Connect IN6 to a switch connected to GND or BAT.
Switch Input Channel 7. Connect IN7 to a switch connected to GND or BAT.
No Connection. Not internally connected.
Hysteresis Input. Connect HYST to GND with a 0 to 900kΩ resistor to set the input voltage hysteresis on
IN0–IN7.
Wetting Current Input. Connect a 30kΩ to 330kΩ resistor from WET to GND to set the wetting current on
IN0–IN7.
Switch Debounce Time Input. Connect a 500pF to 10nF capacitor from TDEB to GND to set the switch
debounce time.
Ground
Overtemperature Warning Output. OT is an open-drain output that asserts low when the thermal warning
threshold is exceeded.
Interrupt Output. INT is an open-drain output that asserts low when one or more of the IN0–IN7 inputs
change state and is enabled for interrupts.
SPI Chip-Select Input. Drive CS low to enable clocking of data into and out of the MAX13036. SPI data is
latched into the MAX13036 on the rising edge of CS.
SPI Serial Data Output. SPI data is output on SDO on the rising edges of CLK while CS is held low. SDO
is tri-stated when CS is high.
SPI Serial Data Input. SPI data is latched into the internal shift register on the falling edges of CLK while
CS is held low. SDI has an internal 100kΩ pulldown resistor.
SPI Serial Clock Input
Logic Power-Supply Input. Connect V_L to a positive 2.7V to 5.5V power supply. Bypass V_L to ground with
a 0.1µF capacitor placed as close as possible to V_L.
Data Output Channel 1. DO1 is the level-shifted output of IN1 when WEND = 0 (normal mode only).
Data Output Channel 0. DO0 is the level-shifted output of IN0 when WEND = 0 (normal mode only).
Shutdown Input. Drive SD low to place the MAX13036 into shutdown mode. Drive SD high for normal
operation. SD is compatible with voltages up to +45V.
Battery Reference Input. Switch thresholds are set to 50% of the voltage applied to BATREF. Connect
BATREF to the system’s battery supply voltage.
Battery Supply Input. Connect BAT to a positive 6V to 26V battery supply voltage. Bypass BAT to ground
with a 0.1µF ceramic capacitor placed as close as possible to BAT. In addition, bypass BAT with a 10µF
or greater capacitor.
Switch Input Channel 0. Connect IN0 to a switch connected to GND. IN0 can be programmed as a direct
input with a level-shifted output on DO0 (see Mechanical Switch Inputs (IN0–IN7) section).
Exposed Paddle. Connect EP to GND.
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