MAX13362 19-4464 Rev 0 2/09 24-Channel Automotive Switch Monitor General Description Features The MAX13362 is a 24-channel automotive contact mon- 9V to 18V Operating Voltage Range with Full itor designed as an interface between mechanical Performance switches and low-voltage processors or other logic cir- Fully Functional Range of 5.5V to 28V cuits. The IC operates over a voltage range of 5.5V to 28V, and withstands voltages up to 40V. It protects low- Switch Inputs Withstand 27V voltage circuitry from high voltages and reverse battery Switch Inputs Withstand Reverse Battery conditions. The MAX13362s low-current operation under Ultra-Low Operating Current 100A (typ) in Scan all operating conditions makes it suitable for use in elec- tronic control units (ECUs) that are connected directly to Mode the automotive battery. It has an adjustable scan mode Built-In Switching Hysteresis that significantly reduces the current drawn in key-off. Built-In Switch Deglitching The MAX13362 features an SPI interface to monitor CMOS-Compatible Logic Outputs Down to 3.0V the switch status and set the device configuration. Multiple MAX13362s can be cascaded to support any Interrupt Output to Processor multiple of 24 switches. Configurable Wetting Current (0mA, 5mA, 10mA, The MAX13362 is available in a 6mm x 6mm, 40-pin or 15mA) for Each Switch Input thin QFN package and operates over the -40C to AEC-Q100 Qualified +125C temperature range. Applications Ordering Information Automotive Body Controllers PART TEMP RANGE PIN-PACKAGE Automotive Door Modules 40 Thin QFN-EP* M AX13362A TL/V+ -40C to +125C (6mm x 6mm) Automotive Smart Junction Boxes *EP = Exposed pad. +Denotes a lead(Pb)-free/RoHS-compliant package. /V Denotes an automotive qualified part. Typical Application Circuit Pin Configuration TOP VIEW BATTERY 24 SWITCHES, 1 BATTERY-CONNECTED 9V TO 18V ECU CONNECTOR IN7 31 20 VS IN8 32 19 VS 0.047F IN9 33 18 GND 0.047F IN10 34 17 V DD 100 MAX13362 IN11 35 16 GND IN12 36 15 SDI VS IN13 37 14 CS IN REGULATOR IN14 38 13 SDO MAX13362 OUT V DD IN15 39 12 CLK SD INT GND SDI SDO CLK CS IN16 40 + 11 N.C. MICROCONTROLLER /LOGIC CIRCUIT THIN QFN (6mm x 6mm) SPI is a trademark of Motorola, Inc. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE IN23 IN22 IN21 IN20 IN19 IN18 IN17 IN16 IN15 IN14 IN13 IN12 IN11 IN10 IN9 IN8 IN7 IN6 IN5 IN4 IN3 IN2 IN1 IN0 N.C. 1 30 N.C. N.C. 2 29 N.C. IN17 3 28 IN6 IN18 4 27 IN5 IN19 5 26 IN4 IN20 6 25 IN3 IN21 7 24 IN2 IN22 8 23 IN1 IN23 9 22 IN0 INT 10 21 SD24-Channel Automotive Switch Monitor ABSOLUTE MAXIMUM RATING V , CLK, SDI, CS to GND ......................................-0.3V to +6V Current Into Any Pin..........................................................20mA DD Continuous Power Dissipation (T = +70C) VS, SD, INT to GND................................................-0.3V to +40V A IN0IN23 to GND.....................................................-15V to +27V (derate 37mW/C above +70C)(multilayer board)....2963mW Operating Temperature Range .........................-40C to +125C SDO to GND...............................................-0.3V to (V + 0.3V) DD Junction Temperature........................................-40C to +150C ESD Protection, All Pins (HBM)............................................2kV ESD Protection on Pins IN0IN23 to IEC 61000-4-2 Specification Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C (with added 0.047F capacitor, and/or 100 resistor)....8kV 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 (V = 5V, V = 14V, T = -40C to +125C, unless otherwise noted. Typical values are at T =+25C.) DD VS A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLY V Operating Supply Range V 3 5.5 V DD DD V Supply Current I 0.1 10 A DD DD VS Supply Range V (Note 1) 5.5 28 V VS VS Undervoltage Lockout V 3 5.5 V UVLO t = 64ms, t = 1ms LP bit in POLL POLL ACT internal register = 0, 24 channels active, all 100 170 switches open, T = +25C A t = 64ms, t = 1ms LP bit in Total Supply Current (Flowing POLL POLL ACT I A SUP internal register = 0, 24 channels active, all 100 200 into VS and V ) DD switches open Continuous polling mode, wetting current 1000 set to 5mA VS Supply Current in Shutdown V = 0, V = 14V, all switches open, T = SD VS A I 610 A SDVS Mode +25C V Supply Current in Shutdown DD I V = 0, V = 14V, T = +25C 0.1 5 A SDVDD SD VS A Mode SWITCH INPUTS V = 5.5V to 28V, measured with 100 VS Input Voltage Threshold V 2.5 3.7 V TH series resistor for high-side switches V = 5.5V to 28V, measured with 100 VS Input Hysteresis V 0.2 V H series resistor for high-side switches Wetting Current Rise/Fall Time t 5s IWETT Wetting current set to 15mA, 12.7 15 17.25 9V < V < 18V VS Wetting Current I mA WETT Wetting current set to 15mA, 10.5 15 19.5 (5.5V < V < 9V) or (18V < V < 28V) VS VS V = 0, T = +25C 2 IN A IN0IN23 Input Current I A IN V = 14V, T = +25C (Note 2) 16 30 IN A IN0IN23 Input Leakage Current I V = 0 or 14V, V = 0, T = +25C 2 A LEAKSD VS SD A in Shutdown IN4IN23 Dropout Voltage V I = 15mA (Note 3) 2.8 4.0 V DO15 WETT 2 MAX13362