Rainbow Electronics MAX13362 User Manual

General description, Applications, Features

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

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

0.047

μF

0.047

μF

CLK

REGULATOR

OUT

BATTERY
9V TO 18V

IN11

IN12

IN13

IN14

IN15

IN16

IN17

IN19

IN22

100

MAX13362

Pin Configuration