MAX13362 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – 24-Channel Automotive Switch Monitor

19-4464; Rev 0; 2/09
EVAALVUAAILTAIOBNLEKIT
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
VS
MAX13362
VDD
SD
GND
SDI SDO
CLK
CS
INT
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.