Click here to ask about the production status of specific part numbers. MAX16136 High-Precision Supervisory ICs with Window Watchdog and Overvoltage Indicator General Description Benefits and Features The MAX16136, a low voltage, 1% accurate window-de- 1% Accuracy tector supervisor circuit monitors a single system supply Enables ASIL Compliance at System Level voltage and the integrity of code execution by a micro- FMEDA Results Available upon Request processor or microcontroller. This device features an ac- 0.5V to 5V Threshold Range with 20mV Increments tive-low, open-drain output that asserts whenever the 4% to 11% Undervoltage/Overvoltage Thresholds monitored supply rail falls outside of the factory-trimmed Latched Overvoltage Fault Output undervoltage/overvoltage window threshold. The reset Clear Fault Input output remain asserted for the programmed reset timeout 5s Overvoltage Fault Delay period after the monitored supply voltage falls within the Window Watchdog Timeout undervoltage/overvoltage window threshold. Factory-Set Reset Timeout The MAX16136 offers factory-trimmed voltage thresholds Open-Drain Reset Output from 0.5V to 5V in approximately 20mV increment. A va- 8-Pin TDFN Side-Wettable Package riety of factory trimmed undervoltage/overvoltage thresh- -40C to +125C Operating Temperature Range olds from 4% to 11% are available to accommodate dif- Ordering Information appears at end of data sheet. ferent supply voltages and tolerances. A window-watchdog timer circuit monitors microprocessor Typical Application Circuit or microcontroller activity. During normal operation, the microprocessor or microcontroller must repeatedly toggle VBAT the watchdog input (WDI) low within the fast watchdog DC-DC timeout (t ) and slow watchdog timeout (t ). If C IN WD F WD S IN OUT the microcontroller or microprocessor does not toggle WDI EN 1.71V TO 5.5V within the window-timeout period, the supervisor asserts COUT 10k the watchdog output (WDO) to signal that the system is not executing code as expected. The watchdog output pulse can be used to reset the microprocessor or micro- V DD OV V CC 0.1F controller, or it may be used to interrupt the system to warn IN of execution errors. MAX16136 RST RST C In addition, the MAX16136 features an overvoltage fault WDO NMI C CLR output (OV) that latches low when the monitored rail ex- WDI I/O GND GND ceeds the overvoltage threshold. The latched output can be cleared by pulling CLR low. The MAX16136 is available in a small, 2mm x 2mm, 8-pin TDFN side-wettable package with exposed pad and oper- ates over the automotive temperature range of -40C to +125C. Applications Advanced Driver-Assistance Systems (ADAS) Automotive Multivoltage ASICs Servers Storage Equipment 19-100580 Rev 1 6/21MAX16136 High-Precision Supervisory ICs with Window Watchdog and Overvoltage Indicator Absolute Maximum Ratings V to GND .............................................................. -0.3V to +6V Operating Temperature Range ...........................-40C to +125C DD IN, WDO, RST, CLR, OV, WDI to GND .................... -0.3V to +6V Junction Temperature .......................................................+150C Input/Output Continuous Current, WDO, RST, CLR, OV, WDI Soldering Temperature (Reflow) .......................................+260C ........................................................................................... 20mA Storage Temperature Range ..............................-65C to +150C Continuous Power Dissipation (T = +70C) Lead Temperature (Soldering, 10s) .................................. +300 C A TDFN (derate 11.7mW/C above 70C) .................... 937.9mW 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. Package Information 8 TDFN Package Code T822Y+3C Outline Number 21-100185 Land Pattern Number 90-100070 Thermal Resistance, Four-Layer Board: Junction to Ambient ( ) 85.3C/W JA Junction to Case ( ) 8.9C/W JC For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a +, , or - in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. Electrical Characteristics (V = 1.71V to 5.5V. T = T = -40C to +125C, unless otherwise noted. Typical values are at T = +25C under normal conditions, DD A J A unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLY Comparators functional 1.71 5.5 Operating Voltage V V DD Range Output guaranteed to be at known state 1.1 Supply Current I RST, OV , WDO not asserted 15 35 A DD Undervoltage Lockout V V rising 1.3 1.50 1.68 V UVLO DD Threshold Undervoltage Lockout V V falling 47 mV UVLO HYS DD Hysteresis INPUT VOLTAGE (IN) Nominal Input Threshold V 0.5 5 V IN NOM Voltage Range Nominal Input Threshold V IN NOM STE Voltage Programming 20 mV P Step Undervoltage/ Reset occurs when V falls outside % of IN NOM Overvoltage TOL 4 11 of V x (1 TOL) V IN NOM IN NOM Programming Range www.maximintegrated.com Maxim Integrated 2