MAX13036ATI+ Fast Delivery |IC PHOENIX CO.,LIMITED

MAX13036ATI+ ,Contact Monitor and Level ShifterFeaturesThe MAX13036 contact monitor and level shifter monitors ● +6V to +26V Operating Voltage Ran ..
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MAX13036ATI+
Contact Monitor and Level Shifter
General Description
The MAX13036 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 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 ground-connected 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
voltage applied to BAT. A separate +2.7V to +5.5V
logic supply input (VL) 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 tem-
perature range.
Applications
Control ECUs
Features●+6V to +26V Operating Voltage Range●+42V Compatibility on BAT●Inputs Withstand Reverse Battery●Withstands Dynamic Battery Voltage Drop While VL
is Present●Ultra-Low Operating Current 17μA (typ) in Scan
Mode●Resistor-Adjustable Switching Hysteresis●CMOS-Compatible Logic Outputs (+2.7V min)●Built-In Switch Debouncing●Interrupt Output●Immunity to Transients●High Modularity●Thermal Protection●±8kV HBM ESD Protection on IN0–IN7 Without
External Components●Two Inputs (IN0, IN1) Programmable as Direct
Outputs●Four Inputs (IN4–IN7) Programmable for BAT or
GND Related Switches
Typical Application Circuit appears at end of data sheet.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
PARTTEMP RANGEPIN-PACKAGE
MAX13036ATI+-40°C to +125°C28 TQFN-EP*
(5mm x 5mm)201918171615234567
MAX13036
TQFN
TOP VIEW
DO0
GND
BATREF
BAT
N.C.
INO
DO1N.C.V
CLKSDISDOCS
INT
GND
TDEB
WET
HYST
N.C.
*EP
*CONNECT EXPOSED PADDLE TO GROUND
IN7IN6IN5IN4IN3IN2IN1
MAX13036Contact Monitor and Level Shifter
Pin Coniguration
Ordering Information
EVALUATION KIT AVAILABLE
(All voltages referenced to GND, unless otherwise noted.)
VL .........................................................................-0.3V to +6.0V
BAT ........................................................................-0.3V to +42V
BATREF, IN_ to BAT ..............................................-45V to +45V
BATREF, IN_ to GND .............................................-45V to +45V
SD..........................................................................-0.3V to +45V
HYST, WET, TDEB, OT, INT ..................................-0.3V to 6.0V
CS, CLK, SDI, SDO, DO0, DO1 .................-0.3V to (VL + 0.3V)
Continuous Current (CS, CLK, SDI, SDO, DO0, DO1) ....±20mA
HBM ESD Protection (IN0–IN7) ..........................................±8kV
Continuous Power Dissipation (TA = +70°C, multilayer board)28-Pin TQFN (derate 34.5mW/°C above +70°C) ......2759mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
(VL = +2.7V to +5.5V, BAT = +6V to +26V, SD = VL, TA = -40°C to +125°C, unless otherwise noted. Typical values are at VL = +3.3V,
BAT = +14V, TA = +25°C) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
POWER SUPPLY
VL Supply RangeVL2.75.5V
VL Supply CurrentILVL = +5.5V, VBAT = +14V01µA
BAT Supply RangeVBAT626V
Total Supply Current ISUP
VL = +5V, VBAT = +14V, continuous
scan, programmable hysteresis off,
M0 = M1 =1, WEND = 1, IN0–IN7 =
unconnected,
CS = VL, SDI = CLK = GND (Note 2)80µA
Total Supply Current in Scan
Mode ISUP_SCAN
VBAT = +14V, scan mode (SC0 = 0,
SC1= 0, SC2 = 0), CS = VL,
SDI = CLK = GND (Note 2)36µA
Total Supply Current in Shutdown
ModeISHDN
VSD = 0V,
VBAT = +14V,
VBATREF =
+14V (Note 2)
TA = +25°C23.2
TA = -40°C to +125°C24.0
BATREF Input Leakage Current in
ShutdownIL_BATREFVSD = 0V, VBATREF = +14V1µA
BATREF Input ResistanceRBATREFVBATREF = +14V1MΩ
SWITCH INPUTS (IN0–IN7)
Input-Voltage Threshold Center
(Note 3)VTH_C
RHYST = ∞ or programmable hysteresis
disabled
0.425 x
VBATREF
0.5 x
VBATREF
0.575 x
VBATREF
RHYST = 90kΩ0.4 x
VBATREF
0.5 x
VBATREF
0.63 x
VBATREF
Input-Voltage Threshold
Hysteresis (Note 4)VTH_HYS
RHYST = ∞ or programmable hysteresis
disabled
0.133 x
VBATREF
0.166 x
VBATREF
0.22 x
VBATREFRHYST = 90kΩ0.26 x
VBATREF
0.361 x
VBATREF
0.48 x
VBATREF0.5 x
MAX13036Contact Monitor and Level Shifter
Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Electrical Characteristics
(VL = +2.7V to +5.5V, BAT = +6V to +26V, SD = VL, TA = -40°C to +125°C, unless otherwise noted. Typical values are at VL = +3.3V,
BAT = +14V, TA = +25°C) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Switch-State Sense ResistorRSENSE111622kΩ
Wetting Current Rise/Fall TimeIWET_RISE_
FALL
RWET = 61kΩ
(Note 5)
Rise6
Fall1
Wetting CurrentIWET
RWET = 61kΩ22RWET = 30kΩ, VBAT = 14V284051
RWET = 330kΩ7.5
IN0–IN7 Input Impedance in
ShutdownVSD = 0V, VIN_ = +14V5.58.5MΩ
LOGIC-LEVELS
SDO, DO0, DO1 Output
Voltage HighVOHSource current = 2mA0.8 x VLV
SDO, DO0, DO1 Output
Voltage LowVOLSink current = 4mA0.2 x VLV
INT, OT Output Voltage LowVINTLSink current = 4mA0.4V
SD Input Leakage CurrentIL_ SD VSD = VBAT = +12V1530µA
SD Input-Voltage LowVIL_SD0.8V
SD Input-Voltage HighVIH_ SD2.4V
CS, CLK, SDI Input-Voltage LowVIL0.33 x VLV
CS, CLK, SDI Input-Voltage HighVIH0.66 x VLV
CS, CLK Input Leakage Current IIL-1+1µA
INT, OT Leakage CurrentIOL-1+1µA
SDI Input ImpedanceRSDI65100145kΩ
THERMAL SHUTDOWN
Thermal Shutdown TemperatureTSHDN+170°C
Thermal Shutdown HysteresisTHYST15°C
MAX13036Contact Monitor and Level Shifter
Electrical Characteristics (continued)
Note 1: All units are 100% production tested at TA = +125°C. Limits over the operating temperature range are guaranteed by cor-
relation to the +125°C tests.
Note 2: The total supply current is the sum of the current flowing into VL, BAT, and BATREF.
Note 3: VTH_C = (VTH_HIGH + VTH_LOW)/2.
Note 4: VTH_HYS = (VTH_HIGH - VTH_LOW).
Note 5: Wetting current rise/fall time is measured as the time from 10% to 90% of the maximum wetting current.
Note 6: Guaranteed by design.
(VL = +2.7V to +5.5V, BAT = +6V to +26V, SD = VL, TA = -40°C to +125°C, unless otherwise noted. Typical values are at VL = +3.3V,
BAT = +14V, TA = +25°C) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
IN0 to DO0 Propagation Delay
tPROP
VBAT = 6V2235IN1 to DO1 Propagation DelayVBAT = +14V22
CLK FrequencyfCLKInput rise/fall time < 2ns,
VL = +3.0V to +5.5V5MHz
Falling Edge of CS to Rising Edge
of CLK Required Setup TimetLEADInput rise/fall time < 2ns,
VL = +3.0V to +5.5V, Figure 1110ns
Falling Edge of CLK to Rising
Edge of CS Required Setup TimetLAGInput rise/fall time < 2ns,
VL = +3.0V to +5.5V, Figure 150ns
SDI Valid to Falling Edge of CLK
Required Setup TimetSI(SU)Input rise/fall time < 2ns,
VL = +3.0V to +5.5V, Figure 130ns
Falling Edge of CLK to SDI
Required Hold TimetSI(HOLD)Input rise/fall time < 2ns,
VL = +3.0V to +5.5V, Figure 120ns
Time From Falling Edge of CS to
SDO Low ImpedancetSO(EN)Input rise/fall time < 2ns,
VL = +3.0V to +5.5V, Figure 155 ns
Time From Rising Edge of CS to
SDO High ImpedancetSO(DIS)VL = +3.0V to +5.5V, Figures 1 and 255ns
Time from Rising Edge of CLK to
SDO Data ValidtVALIDCSDO =15pF,
VL = +3.0V to +5.5V, Figure 170ns
Debounce timetDEBCTDEB = 500pF3.185.99.42ms
CTDEB = 10nF (Note 6)63120188
Scanning Time PulsetSCAN130250400µs
Scanning Time PeriodtSCAN_PSC2 = 0, SC1 = 1, SC0 = 14814ms
Wetting Time PulsetWETWTOFF = 0102135ms
Time from Shutdown To Normal
Operation
SD low-to-high transition to input
monitoring enabled200µs
MAX13036Contact Monitor and Level Shifter
Timing Characteristics
Figure 1. SPI Timing Characteristics
Figure 2. SDO Enable/Disable Test Circuit and Timing Diagram
CLK
SDIMSB IN
MSB OUTLSB OUT
tSO(DIS)tVALIDtSO(EN)
tLEAD
SDO
tLAG
tSI(SU)tSI(HOLD)
MAX13036
SDO
SDOCS
15pF1/3VL
1kΩ
tSO(EN)
tSO(DIS)
VOL + 0.1VL
MAX13036Contact Monitor and Level Shifter
Test Circuits/Timing Diagrams
(VL = +3.3V, BAT = +14V, SD = VL, RWET = 61kΩ, RHYST = 90kΩ, CTDEB = 4700pF, TA = +25°C, unless otherwise noted.)
WETTING CURRENT vs. RWET
RWET (kΩ)
WETTING CURRENT (mA)
MAX13036 toc0280130180230280330
GND-CONNECTED SWITCH
BAT-CONNECTED SWITCH
WETTING CURRENT PULSE
(NORMAL MODE, WTOFF = 0, WEN = WEND = 1)
MAX13036 toc03
20ms/div
VIN_
10V/div
IIN_
20mA/div
INT
2V/div
BAT CURRENT vs. TEMPERATURE
(NORMAL MODE)
TEMPERATURE (°C)
(µA)
MAX13036 toc04
ADJUSTABLE HYSTERESIS OFF
ADJUSTABLE HYSTERESIS ON
BAT CURRENT vs. TEMPERATURE
(SHUTDOWN MODE)
TEMPERATURE (°C)
(µA)
MAX13036 toc05
SD = LOW
BAT CURRENT vs. TEMPERATURE
(SCAN MODE)
TEMPERATURE (°C)
(µA)
MAX13036 toc06
SCANNING PERIOD = 64ms
SCANNING PERIOD = 2ms
TYPICAL IN0 DRIVING
(NORMAL MODE, WTOFF = WEN = WEND = 0)
MAX13036 toc07
40µs/div
VIN0
5V/div
VDO0
2V/div
f = 5kHz
WETTING CURRENT vs. VBAT
VBAT (V)
WETTING CURRENT (mA)
MAX13036 toc011014182226
GND-CONNECTED SWITCH
BAT-CONNECTED SWITCH
TYPICAL IN0 DRIVING
(NORMAL MODE, WTOFF = WEN = WEND = 0)
MAX13036 toc08
2ms/div
VIN0
5V/div
VDO0
2V/div
f = 100Hz
ADJUSTABLE HYSTERESIS OFF
HYSTERESIS vs. RHYST
HYSTERESIS (V)
MAX13036 toc09200k400k600k800k1M
ADJUSTABLE HYSTERESIS ON
MAX13036Contact Monitor and Level Shifter
Typical Operating Characteristics
(VL = +3.3V, BAT = +14V, SD = VL, RWET = 61kΩ, RHYST = 90kΩ, CTDEB = 4700pF, TA = +25°C, unless otherwise noted.)
INPUT WAVEFORM IN SCAN MODE
(SCAN MODE, WTOFF = WEN = 0, WEND = 1)
MAX13036 toc12
400µs/div
VIN_
5V/div
SCANNING PERIOD = 2ms
INPUT SWITCH OPEN
DEBOUNCE TIME vs. TEMPERATURE
TEMPERATURE (°C)
DEBOUNCE TIME (ms)
MAX13036 toc13
DEBOUNCE TIME vs. BAT VOLTAGE
DEBOUNCE TIME (ms)
MAX13036 toc141014182226
DEBOUNCE TIME vs. CTDEB
DEBOUNCE TIME (ms)
MAX13036 toc15200040006000800010000
SWITCHING THRESHOLD vs. TEMPERATURE
TEMPERATURE (°C)
SWITCHING THRESHOLD (V)
MAX13036 toc10
ADJUSTABLE HYSTERESIS OFF
VIN_ RISING
VIN_ FALLING
SWITCHING THRESHOLD vs. VBAT
VBAT (V)
SWITCHING THRESHOLD (V)
MAX13036 toc11014182226
VIN_ RISING
VIN_ FALLING
ADJUSTABLE HYSTERESIS OFF
MAX13036Contact Monitor and Level Shifter
Typical Operating Characteristics (continued)
PINNAMEFUNCTIONIN1Switch 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).IN2Switch Input Channel 2. Connect IN2 to a switch connected to GND.IN3Switch Input Channel 3. Connect IN3 to a switch connected to GND. IN4Switch Input Channel 4. Connect IN4 to a switch connected to GND or BAT.IN5Switch Input Channel 5. Connect IN5 to a switch connected to GND or BAT.IN6Switch Input Channel 6. Connect IN6 to a switch connected to GND or BAT.IN7Switch Input Channel 7. Connect IN7 to a switch connected to GND or BAT.
8, 20, 27N.C.No Connection. Not internally connected.HYSTHysteresis Input. Connect HYST to GND with a 0 to 900kΩ resistor to set the input voltage hysteresis on
IN0–IN7.WETWetting Current Input. Connect a 30kΩ to 330kΩ resistor from WET to GND to set the wetting current on
IN0–IN7.TDEBSwitch Debounce Time Input. Connect a 500pF to 10nF capacitor from TDEB to GND to set the switch
debounce time.
12, 24GNDGroundOTOvertemperature Warning Output. OT is an open-drain output that asserts low when the thermal warning
threshold is exceeded.INTInterrupt 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.CSSPI 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.SDOSPI 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.SDISPI 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.CLKSPI Serial Clock InputVLLogic Power-Supply Input. Connect VL to a positive 2.7V to 5.5V power supply. Bypass VL to ground with a
0.1µF capacitor placed as close as possible to VL.DO1Data Output Channel 1. DO1 is the level-shifted output of IN1 when WEND = 0 (normal mode only).DO0Data Output Channel 0. DO0 is the level-shifted output of IN0 when WEND = 0 (normal mode only).SDShutdown 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.BATREFBattery Reference Input. Switch thresholds are set to 50% of the voltage applied to BATREF. Connect
BATREF to the system’s battery supply voltage. BAT
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.IN0Switch 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).
MAX13036Contact Monitor and Level Shifter
Pin Description
Detailed Description
The MAX13036 contact monitor and level shifter monitors
and debounces eight remote mechanical switches and
asserts an interrupt (INT) if a switch changes state. Any
of the switch inputs can be prohibited from asserting an
interrupt. The switch threshold levels are set to 50% of
the voltage applied to BATREF. All switch inputs feature common adjustable hysteresis, debounce time and
wetting current. Two switch inputs (IN0, IN1) are program-
mable to have direct outputs (DO0, DO1) useable for
PWM or other timing based signals.
The MAX13036 features an SPI interface to monitor
individual switch inputs and to configure interrupt mask-
ing, hysteresis and wetting current enable/disable, switch
configuration (battery connected or ground connected),
and scanning period.
The MAX13036 features three modes of operation: nor-
mal mode, scan mode, and shutdown mode. In normal
mode, the part is fully functional and sensing resistors are
connected to all switch inputs. In scan mode, the sens-
ing resistors are connected for a finite duration to reduce
power consumption. In shutdown mode, all switch inputs
VL is the power-supply input for the digital input/output
buffers. The SPI interface (CS, CLK, SDI, SDO), and
digital outputs (DO0, DO1) are referenced to the voltage
on VL. Connect VL to the system’s +2.7V to +5.5V logic-
level supply. Bypass VL to ground with a 0.1μF capacitor
placed as close as possible to the device.
BAT
BAT is the main power-supply input. 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. BAT can withstand DC voltages up
to +42V.
Mechanical Switch Inputs (IN0–IN7)
IN0 through IN7 are the inputs for remote mechanical
switches. The status of each switch input is indicated by
the SW0 through SW7 bits in the status register, and each
switch input can be programmed to not assert an interrupt
(INT) by writing to the P0 through P7 bits in the command
register. All switch inputs are configured to assert an inter-
rupt upon power-up.
MAX13036
LEVEL
TRANSLATORS
WETTING
CURRENT
CONTROL
DIGITAL
INTERFACE
SHIFT
REGISTER
INTERRUPT
LOGIC
SPI
INTERFACE
IN0
BATREF
IN1
IN2
IN3
IN4
IN5
IN6
IN7
HYSTWETTDEBGND
BATVLSD
DO0
DO1
CLK
SDI
SDO
INT
MAX13036Contact Monitor and Level Shifter
Functional Diagram

Partno	Mfg	Dc	Qty	Available	Descript
MAX13036ATI+	MAXIM	N/a	12	avai	Contact Monitor and Level Shifter