MAX6715AMAX6729A/ Dual/Triple, Ultra-Low-Voltage, SOT23 P MAX6797A Supervisory Circuits General Description Features V (Primary Supply) Reset Threshold Voltages The MAX6715AMAX6729A/MAX6797A are ultra-low- CC1 from 1.58V to 4.63V voltage microprocessor (P) supervisory circuits designed to V (Secondary Supply) Reset Threshold Voltages monitor two or three system power-supply voltages. These CC2 from 0.79V to 3.08V devices assert a system reset if any monitored supply falls below its factory-trimmed or adjustable threshold and main- Externally Adjustable RSTIN Threshold for Auxiliary/ Triple-Voltage Monitoring (0.62V Internal Reference) tain reset for a minimum timeout period after all supplies rise above their thresholds. The integrated dual/triple superviso- Watchdog Timer Option 35s (min) Long Startup Period ry circuits significantly improve system reliability and reduce 1.12s (min) Normal Timeout Period size compared to separate ICs or discrete components. Manual-Reset Input Option These devices monitor primary supply voltages (V ) CC1 Power-Fail Input/Power-Fail Output Option from 1.8V to 5.0V and secondary supply voltages (V 2) CC (Push-Pull and Open-Drain Active-Low) from 0.9V to 3.3V with factory-trimmed reset threshold Guaranteed Reset Valid Down to V or voltage options (see the Reset Voltage Threshold Suffix CC1 V = 0.8V CC2 Guide). An externally adjustable RSTIN input option Reset Output Logic Options allows customers to monitor a third supply voltage down to 0.62V. These devices are guaranteed to be in the cor- Immune to Short V Transients CC rect reset output logic state when either V or V CC1 CC2 Low Supply Current 14A (typ) at 3.6V remains greater than 0.8V. Watchdog Disable Feature A variety of push-pull or open-drain reset outputs along Small 5, 6, and 8-Pin SOT23 Packages with watchdog input, manual-reset input, and power-fail AEC-Q100 Qualified: MAX6719AUTTWD1/V+T input/output features are available (see the Selector Guide). Select reset timeout periods from 1.1ms to 1120ms (min) (see the Reset Timeout Period Suffix Ordering Information continued at end of data sheet. Guide). The MAX6715AMAX6729A/MAX6797A are available in small 5-, 6-, and 8-pin SOT23 packages and Pin Description and Selector Guide appear at end of data sheet. operate over the -40C to +125C temperature range. Applications Multivoltage Systems Industrial Equipment Telecom/Networking Printers/Fax Machines Typical Operating Circuit Equipment Set-Top Boxes Computers/Servers Portable/Battery- OUT2 DC-DC UNREGULATED CONVERTER IN Operated Equipment DC OUT1 1.8V 0.9V V V CC1 CC2 I/O CORE MAX6715A- SUPPLY SUPPLY MAX6729A/ R1 MAX6797A RST RESET P RSTIN/PFI I/O WDI MR PFO NMI R2 MAX67 PUSHBUTTON SWITCH 19-0536 Rev 6 7/19MAX6715AMAX6729A/ Dual/Triple, Ultra-Low-Voltage, SOT23 P MAX6797A Supervisory Circuits Absolute Maximum Ratings Terminal Voltage (with respect to GND) Continuous Power Dissipation (T = +70C) A V , V .........................................................-0.3V to +6V 5-Pin SOT23-5 (derate 3.9mW/C above +70C) ....312.6mW CC1 CC2 Open-Drain RST, RST1, RST2, PFO, RST ............-0.3V to +6V 6-Pin SOT23-6 (derate 8.7mW/C above +70C) .......696mW Push-Pull RST, RST1, PFO, RST .......... -0.3V to (V + 0.3V) 8-Pin SOT23-8 (derate 5.6mW/C above +70C) ....444.4mW CC1 Push-Pull RST2 ...................................... -0.3V to (V + 0.3V) Operating Temperature Range ......................... -40C to +125C CC2 RSTIN, PFI, MR, WDI .............................................-0.3V to +6V Storage Temperature Range ............................ -65C to +150C Input Current/Output Current (all pins) ...............................20mA Junction Temperature ......................................................+150C Lead Temperature (soldering, 10s) .................................+300C 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 5 SOT23 PACKAGE CODE U5+1 Outline Number 21-0057 Land Pattern Number 90-0174 Thermal Resistance, Four-Layer Board: Junction to Ambient ( ) 324.3C/W JA Junction to Case ( ) 82C/W JC Thermal Resistance, Multilayer Board: Junction to Ambient ( ) 255.9C/W JA Junction to Case ( ) 81C/W JC 6 SOT23 PACKAGE CODE U6+1/U6+1A Outline Number 21-0058 Land Pattern Number 90-0175 Thermal Resistance, Four-Layer Board: Junction to Ambient ( ) N/A JA Junction to Case ( ) 80C/W JC Thermal Resistance, Multilayer Board: Junction to Ambient ( ) 115C/W JA Junction to Case ( ) 80C/W JC 8 SOT23 PACKAGE CODE K8SN+1 Outline Number 21-0078 Land Pattern Number 90-0176 Thermal Resistance, Four-Layer Board: Junction to Ambient ( ) N/A JA Junction to Case ( ) 80C/W JC Thermal Resistance, Multilayer Board: Junction to Ambient ( ) 180C/W JA Junction to Case ( ) 60C/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. Maxim Integrated 2 www.maximintegrated.com