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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

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

MAX13362

24-Channel Automotive Switch Monitor

________________________________________________________________

Maxim Integrated Products

19-4464; Rev 0; 2/09

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.

EVALUATION KIT

AVAILABLE

Ordering Information

PART TEMP RANGE PIN-PACKAGE

M AX 13362ATL/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.

Typical Application Circuit

MICROCONTROLLER

/LOGIC CIRCUIT

SDO CS

IN23

IN6

IN0

IN7

INT

ECU CONNECTOR

24 SWITCHES, 1 BATTERY-CONNECTED

SDI

IN21

IN20

IN18

IN10

IN9

IN8

IN5

IN4

IN3

IN2

IN1

GND

0.047μF

CLK

REGULATOR

OUT

BATTERY

9V TO 18V

IN11

IN12

IN13

IN14

IN15

IN16

IN17

IN19

IN22

100Ω

MAX13362

Pin Configuration

MAX13362

THIN QFN

(6mm x 6mm)

31IN7

32IN8

33IN9

34IN10

35IN11

36IN12

37IN13

38IN14

39IN15

TOP VIEW

IN16

20 VS

19 VS

18 GND

17 V

16 GND

15 SDI

14 CS

13 SDO

12 CLK

11 N.C.

1N.C.

2N.C.

3IN17

4IN18

5IN19

6IN20

7IN21

8IN22

9IN23

10INT

30 N.C.

29 N.C.

28 IN6

27 IN5

26 IN4

25 IN3

24 IN2

23 IN1

22 IN0

21 SD

SPI is a trademark of Motorola, Inc.

1 2 3 4 5 6 ... 13 14

MAX13362 1

Indice de contenidos

Pagina 1 - MAX13362

General DescriptionThe MAX13362 is a 24-channel automotive contact mon-itor designed as an interface between mechanicalswitches and low-voltage proces

Pagina 2

MAX13362Serial Peripheral Interface(CS, SDO, SDI, CLK)The MAX13362 operates as a serial peripheral interface(SPI) slave device. An SPI master accesses

Pagina 3

Command RegisterThree 32-bit command registers are used to configurethe MAX13362 for various modes of operation and areaccessed by the SPI-compatible

Pagina 4

MAX13362IE_: Interrupt EnableThe IE_ bit programs the switch input channel, IN_, tobe interrupt-enabled or interrupt-disabled (0 = interruptdisabled,

Pagina 5

Any switch position change (if the switch is interrupt-enabled) is signaled through the active-low open-drainINT output. The INT output is cleared whe

Pagina 6

MAX1336224-Channel Automotive Switch MonitorMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Ma

Pagina 7

MAX1336224-Channel Automotive Switch Monitor2 _______________________________________________________________________________________ABSOLUTE MAXIMUM

Pagina 8

MAX1336224-Channel Automotive Switch Monitor_______________________________________________________________________________________ 3PARAMETERSYMBOLCO

Pagina 9

MAX1336224-Channel Automotive Switch Monitor4 _______________________________________________________________________________________CSCLKSDI MSB INMS

Pagina 10

MAX1336224-Channel Automotive Switch Monitor_______________________________________________________________________________________ 5WETTING CURRENT v

Pagina 11

MAX1336224-Channel Automotive Switch Monitor6 _______________________________________________________________________________________SWITCH THRESHOLD

Pagina 12

MAX1336224-Channel Automotive Switch Monitor_______________________________________________________________________________________ 7Pin Description (

Pagina 13

MAX1336224-Channel Automotive Switch Monitor8 _______________________________________________________________________________________Functional Diagra

Pagina 14

Detailed DescriptionThe MAX13362 is a 24-channel automotive contactmonitor designed as an interface between mechanicalswitches and low-voltage microco

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