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 input/output features are available (see the Selector Ordering Information Guide). Select reset timeout periods from 1.1ms to PIN- 1120ms (min) (see the Reset Timeout Period Suffix PART TEMP RANGE PACKAGE Guide). The MAX6715AMAX6729A/MAX6797A are MAX6715AUT D +T -40C to +125C 6 SOT23 available in small 5-, 6-, and 8-pin SOT23 packages and MAX6716AUT D +T -40C to +125C 6 SOT23 operate over the -40C to +125C temperature range. MAX6717AUK D +T -40C to +125C 5 SOT23 Applications MAX6718AUK D +T -40C to +125C 5 SOT23 Multivoltage Systems Industrial Equipment Telecom/Networking Printers/Fax Machines MAX6719AUT D +T -40C to +125C 6 SOT23 Equipment Set-Top Boxes MAX6719AUT D /V+T* -40C to +125C 6 SOT23 Computers/Servers +Denotes a lead(Pb)-free/RoHS-compliant package. Portable/Battery- T = Tape and reel. Operated Equipment /V denotes an automotive qualified part. Typical Operating Circuit *Future productcontact factory for availability. Note: The first are placeholders for the threshold voltage OUT2 levels of the devices. Desired threshold levels are set by the part DC-DC UNREGULATED CONVERTER number suffix found in the Reset Voltage Threshold Suffix Guide. IN DC OUT1 1.8V 0.9V The after the D is a placeholder for the reset timeout delay V V CC1 CC2 time. Desired delay time is set using the timeout period suffix I/O CORE MAX6715A- found in the Reset Timeout Period Suffix Guide. For example, SUPPLY SUPPLY MAX6729A/ R1 MAX6797A the MAX6716AUTLTD3-T is a dual-voltage supervisor V = TH1 RST RESET 4.625V, V = 3.075V, and 210ms (typ) timeout period. TH2 P RSTIN/PFI I/O WDI Ordering Information continued at end of data sheet. MR PFO NMI R2 MAX67 PUSHBUTTON Pin Configurations and Selector Guide appear at end of SWITCH data sheet. 19-0536 Rev 4 3/14MAX6715AMAX6729A/ 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 7.1mW/C above +70C) .......571mW 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 8.9mW/C above +70C) .......714mW 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. Electrical Characteristics (V = 0.8V to 5.5V, V = 0.8V to 5.5V, GND = 0V, T = -40C to +125C, unless otherwise noted. Typical values are at T = CC1 CC2 A A +25C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V 0.8 5.5 V CC V < 5.5V all I/O connections open, CC1 15 39 outputs not asserted I CC1 V < 3.6V all I/O connections open, CC1 10 28 outputs not asserted Supply Current A V < 3.6V all I/O connections open, CC2 4 11 outputs not asserted I CC2 V < 2.75V all I/O connections open, CC2 3 9 outputs not asserted L (falling) 4.500 4.625 4.750 M (falling) 4.250 4.375 4.500 T (falling) 3.000 3.075 3.150 S (falling) 2.850 2.925 3.000 V Reset Threshold V R (falling) 2.550 2.625 2.700 V CC1 TH1 Z (falling) 2.250 2.313 2.375 Y (falling) 2.125 2.188 2.250 W (falling) 1.620 1.665 1.710 V (falling) 1.530 1.575 1.620 T (falling) 3.000 3.075 3.150 S (falling) 2.850 2.925 3.000 R (falling) 2.550 2.625 2.700 Z (falling) 2.250 2.313 2.375 Y (falling) 2.125 2.188 2.250 W (falling) 1.620 1.665 1.710 V Reset Threshold V V (falling) 1.530 1.575 1.620 V CC2 TH2 I (falling) 1.350 1.388 1.425 H (falling) 1.275 1.313 1.350 G (falling) 1.080 1.110 1.140 F (falling) 1.020 1.050 1.080 E (falling) 0.810 0.833 0.855 D (falling) 0.765 0.788 0.810 Maxim Integrated 2 www.maximintegrated.com