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PDF MAX13362 Data sheet ( Hoja de datos )
| Número de pieza | MAX13362 | |
| Descripción | 24-Channel Automotive Switch Monitor | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-4464; Rev 0; 2/09
www.DataSheeEt4VUAA.LcVoUAmAILTAIOBNLEKIT
24-Channel Automotive Switch Monitor
General Description
The MAX13362 is a 24-channel automotive contact mon-
itor designed as an interface between mechanical
switches and low-voltage processors or other logic cir-
cuits. The IC operates over a voltage range of 5.5V to
28V, and withstands voltages up to 40V. It protects low-
voltage circuitry from high voltages and reverse battery
conditions. The MAX13362’s low-current operation under
all operating conditions makes it suitable for use in elec-
tronic control units (ECUs) that are connected directly to
the automotive battery. It has an adjustable scan mode
that significantly reduces the current drawn in key-off.
The MAX13362 features an SPI™ interface to monitor
the switch status and set the device configuration.
Multiple MAX13362s can be cascaded to support any
multiple of 24 switches.
The MAX13362 is available in a 6mm x 6mm, 40-pin
thin QFN package and operates over the -40°C to
+125°C temperature range.
Applications
Automotive Body Controllers
Automotive Door Modules
Automotive Smart Junction Boxes
Typical Application Circuit
0.047μF
24 SWITCHES, 1 BATTERY-CONNECTED
ECU CONNECTOR
BATTERY
9V TO 18V
0.047μF
100Ω
MAX13362
GND SDI SDO
CLK CS
INT
VS
VDD
SD
IN
REGULATOR
OUT
Features
♦ 9V to 18V Operating Voltage Range with Full
Performance
♦ Fully Functional Range of 5.5V to 28V
♦ Switch Inputs Withstand 27V
♦ Switch Inputs Withstand Reverse Battery
♦ Ultra-Low Operating Current 100µA (typ) in Scan
Mode
♦ Built-In Switching Hysteresis
♦ Built-In Switch Deglitching
♦ CMOS-Compatible Logic Outputs Down to 3.0V
♦ Interrupt Output to Processor
♦ Configurable Wetting Current (0mA, 5mA, 10mA,
or 15mA) for Each Switch Input
♦ AEC-Q100 Qualified
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX13362ATL/V+
-40°C to +125°C
40 Thin QFN-EP*
(6mm x 6mm)
*EP = Exposed pad.
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V Denotes an automotive qualified part.
Pin Configuration
TOP VIEW
IN7 31
IN8 32
IN9 33
IN10 34
IN11 35
IN12 36
IN13 37
IN14 38
IN15 39
IN16 40
+
MAX13362
20 VS
19 VS
18 GND
17 VDD
16 GND
15 SDI
14 CS
13 SDO
12 CLK
11 N.C.
MICROCONTROLLER
/LOGIC CIRCUIT
SPI is a trademark of Motorola, Inc.
THIN QFN
(6mm x 6mm)
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1 page  
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24-Channel Automotive Switch Monitor
Typical Operating Characteristics
(VDD = VSD = 5V, VVS = 14V, TA = +25°C, unless otherwise noted.)
WETTING CURRENT vs. VS VOLTAGE
20
15 IWETT = 15mA
10 IWETT = 10mA
WETTING CURRENT vs. TEMPERATURE
20
15
IWETT = 15mA
10
IWETT = 10mA
SWITCH STATUS CHANGE
(CONTINUOUS MODE)
MAX13362 toc03
VIN0 10V
0V
10V/div
IWETT 0mA
5mA
5mA/div
VINT 2V/div
5
IWETT = 5mA
5
IWETT = 5mA
VCS
2V/div
0
5 6 7 8 9 10 11 12 13 14 15 16 17 18
VS VOLTAGE (V)
WETTING CURRENT
(POLLING MODE)
MAX13362 toc04
5mA
4.096ms POLLING TIME
512μs POLLING ACTIVE TIME
1ms/div
VS SUPPLY CURRENT vs. TEMPERATURE
(SHUTDOWN MODE)
6.5
0
-40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
VS SUPPLY CURRENT vs. TEMPERATURE
(CONTINUOUS MODE)
2600
IWETT = 15mA FOR ALL CHANNELS
2200
1800 IWETT = 10mA FOR ALL CHANNELS
1400
IWETT = 5mA FOR ALL CHANNELS
1000
ALL CHANNELS OPEN
600
IWETT = 0mA FOR ALL CHANNELS
200
-40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
SWITCH THRESHOLD vs. TEMPERATURE
(HIGH SIDE SWITCH)
3.4
10ms/div
VS SUPPLY CURRENT vs. TEMPERATURE
(POLLING MODE)
130
POLLING TIME = 65.536ms
POLLING ACTIVE TIME = 1.024ms
ALL CHANNELS OPEN
120 IWETT = 5mA
110
100
90
-40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
SWITCH THRESHOLD vs. TEMPERATURE
(LOW-SIDE SWITCH)
3.4
6.2
5.9
5.6
5.3
5.0
-40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
3.3
SWITCH OPEN TO CLOSE
3.2
SWITCH CLOSE TO OPEN
3.1
HIGH SIDE SWITCH
15mA WETTING CURRENT
100Ω INCLUDED
3.0
-40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
3.3 SWITCH OPEN TO CLOSE
3.2
SWITCH CLOSE TO OPEN
3.1
LOW-SIDE SWITCH
15mA WETTING CURRENT
3.0
-40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
_______________________________________________________________________________________ 5
5 Page 
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24-Channel Automotive Switch Monitor
Command Register
Three 32-bit command registers are used to configure
the MAX13362 for various modes of operation and are
accessed by the SPI-compatible interface (see Table 2).
The default configuration after power-on is LH_ = 0,
ground connected.
Table 2. Command Register Map
D29 D28 D27 D26 D25 D24 D23 D22 D21 D20 D19 D18 D17 D16 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 CB1 CB0
X
LP
PA2
PA1
PA0
W23. W22.
00
W21
.0
W20
.0
W19 W18
.0 .0
W17 W16. W15
.0 0 .0
W14
.0
W13 W12 W11
.0 .0 .0
W10
.0
W9.
0
W8.
0
W7.
0
W6. W5. W4.
000
W3.
0
W2. W1. W0.
000
X
0
0
X
P3
P2
P1
P0
W23. W22. W21 W20
1 1 .1 .1
W19 W18
.1 .1
W17 W16. W15
.1 1 .1
W14
.1
W13 W12 W11
.1 .1 .1
W10
.1
W9.
1
W8.
1
W7.
1
W6. W5. W4.
111
W3.
1
W2. W1. W0.
111
X
0
1
LH2
3
LH3
LH2
LH1 LH0 IE23 IE22 IE21 IE20 IE19 IE18 IE17 IE16 IE15 IE14 IE13 IE12 IE11 IE10
IE9
IE8
IE7
IE6
IE5 IE4
IE3
IE2
IE1 IE0
X
1
0
NO OPERATION (NO DATA WRITTEN)
11
LH_: Switch Configuration for IN0–IN3 and IN23
The LH0–LH3 and LH23 bits set the switch configuration
for IN0–IN3 and IN23, respectively. Set LH_ to 0 to con-
figure the input channel to ground connected. Set LH_
to1 to configure the input channel to battery connected.
P0–P3: Polling Time
P0–P3 are used to set the polling time as shown in Table 3.
PA0–PA2: Polling Active Time
PA0–PA2 are used to set the polling active time as
shown in Table 4.
Table 3. Polling Time Setting
P3 P2 P1
000
000
001
001
010
010
011
011
100
100
101
101
110
110
111
111
*Default POR value.
P0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
POLLING TIME (ms)
Continuous*
4.096
4.096
4.096
4.096
4.096
8.192
16.384
32.768
65.536
131
262.1
524.3
1049
2097
4194
Table 4. Polling-Active Time Setting
PA2 PA1 PA0
000
001
010
011
100
101
110
111
*Default POR Value.
POLLING ACTIVE TIME (µs)
64
128
256
512*
1024
2048
4096
4096
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet MAX13362.PDF ] | |
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