MAX6701-08/ Low-Voltage, SOT23 P Supervisors with Power-Fail MAX6701A-03A/ In/Out, Manual Reset, and Watchdog Timer MAX6705A-07A General Description Features Small 8-Pin SOT23 Package The MAX6701MAX6708 microprocessor (P) supervisory circuits reduce the complexity and components required Precision Monitoring of +5.0V, +3.3V, +3.0V, +2.5V Supply Voltages to monitor power-supply functions in P systems. These devices significantly improve system reliability and accu- 140ms Reset Timeout Delay racy compared to separate ICs or discrete components. Power-Fail Input with Independent Output Monitor Inputs Down to 0.62V (MAX6704MAX6708) The MAX6701MAX6708 family provides four func- tions: a reset output during power-up, power-down, and Dual Adjustable Reset Input for Triple-Voltage Monitoring (MAX6701(A)/MAX6702(A)/MAX6703(A)) brownout conditions an independent watchdog output that goes low if the watchdog input has not been toggled 1.6s Watchdog Timeout Period within 1.6s a 0.62V threshold detector for power-fail (MAX6701(A)MAX6707(A)) warning and an active-low manual reset input. Independent Watchdog Output (MAX6701(A)/MAX6702(A)/MAX6703(A)/ The MAX6701MAX6708 family offers several pinout MAX6705(A)/MAX6706(A)/MAX6707(A)) options to accommodate a variety of multivoltage micro- Manual Reset Input processor supervision applications. Four Reset Output Stage Options The MAX6701(A)/MAX6702(A)/MAX6703(A) monitor Active Low Push-Pull (MAX6701(A), MAX6705(A)) three supply voltages (one fixed threshold and two Active Low Open Drain (MAX6703(A), MAX6707(A)) adjustable) to drive a single reset output and include a Active High Push-Pull (MAX6702(A), MAX6706(A)) manual reset input and a watchdog timer with an inde- Dual Active Low/High Push-Pull (MAX6704, pendent output. The MAX6704 monitors a single-supply MAX6708) voltage to drive complementary reset outputs and Guaranteed Reset Valid to V = 1V CC includes an independent adjustable power-fail-in/power- Immune to Short Falling V Transients CC fail-out comparator, a manual reset input, and a reset- Low Cost, Few External Components based watchdog timer. The MAX6705(A)/MAX6706(A)/ Ordering Information MAX6707(A) monitor a single-supply voltage to drive a single reset output and include an independent PART TEMP RANGE PIN-PACKAGE adjustable power-fail-in/power-fail-out comparator, a MAX6701 KA-T -40C to +125C 8 SOT23 manual reset input, and a watchdog timer with an inde- MAX6701A KA-T -40C to +125C 8 SOT23 pendent output. The MAX6708 is the same as the Insert the desired suffix letter (from the Threshold Suffix Guide MAX6704 but without the watchdog timer function. table) into the blank to complete the part number. All devices See the Detailed Description for differences between must be ordered in increments of 2500 pieces. Sample stock is typically held on standard versions only. Contact factory for non-A and A versions. availability. Devices are available in both leaded and lead-free packaging. Applications Specify lead-free by replacing -T with +T when ordering. Ordering Information continued at end of data sheet. Computers Networking Pin Configurations Controllers Telecommunications Intelligent Instruments TOP VIEW Critical P Power MR 1 8 WDO Monitoring V 2 7 RESET (RESET) CC MAX6701(A) White Goods MAX6702(A) GND 3 6 WDI MAX6703(A) RST IN1 4 5 RST IN2 Typical Operating Circuit and Selector Guide appear at end of data sheet. SOT23 ( ) ARE FOR MAX6702(A) ONLY. Pin Configurations continued at end of data sheet. 19-1952 Rev 4 5/14MAX6701-08/ Low-Voltage, SOT23 P Supervisors with Power-Fail MAX6701A-03A/ In/Out, Manual Reset, and Watchdog Timer MAX6705A-07A Absolute Maximum Ratings V .......................................................................-0.3V to +6.0V Continuous Power Dissipation (T = +70C) CC A Open-Drain RESET, WDO, PFO ........................-0.3V to +6.0V 8-Pin SOT23 (derate 8.9mW/C above +70C) ..........714mW Push-Pull RESET, RESET, WDO, PFO ... -0.3V to (V + 0.3V) Operating Temperature Range ......................... -40C to +125C CC MR, WDI, PFI, RST IN1, RST IN2 ......... -0.3V to (V + 0.3V) Junction Temperature ......................................................+150C CC Input Current (V ) ............................................................20mA Storage Temperature Range ............................ -65C to +150C CC Output Current (O, WDO) ..................................................20mA 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 = +4.25V to +5.5V for L/M versions, V = +2.55V to +3.6V for the T/S/R versions, V = +2.1V to +2.75V for the Z/Y versions. CC CC CC T = -40C to +125C, unless otherwise specified. Typical values are at T = +25C.) (Note 1) A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS T = 0C to +125C 1.0 5.5 A Operating Voltage Range V V CC T = -40C to +125C 1.2 5.5 A V < 5.5V, no load 12 25 CC Supply Current I V < 3.6V, no load 9 20 A CC CC MR Unconnected V < 3.6V, no load (MAX6708 only) 6 20 CC T = -40C to +85C 4.50 4.63 4.75 A MAX670 L/MAX670 AL T = -40C to +125C 4.47 4.78 A T = -40C to +85C 4.25 4.38 4.50 A MAX670 M/MAX670 AM T = -40C to +125C 4.22 4.53 A T = -40C to +85C 3.00 3.08 3.15 A MAX670 T/MAX670 AT T = -40C to +125C 2.97 3.17 A T = -40C to +85C 2.85 2.93 3.00 A V Reset Threshold CC V MAX670 S/MAX670 AS V TH (V falling) CC T = -40C to +125C 2.83 3.02 A T = -40C to +85C 2.55 2.63 2.70 A MAX670 R/MAX670 AR T = -40C to +125C 2.53 2.72 A T = -40C to +85C 2.25 2.32 2.38 A MAX670 Z/MAX670 AZ T = -40C to +125C 2.24 2.40 A T = -40C to +85C 2.12 2.19 2.25 A MAX670 Y/MAX670 AY T = -40C to +125C 2.11 2.27 A Reset Threshold V 60 ppm/C TH Temperature Coefficient V to Reset Output Delay V falling at 10mV/s 12 s CC CC T = -40C to +85C 140 200 280 A Reset Timeout Period t ms RP T = -40C to +125C 120 300 A MAX6701(A)/MAX6702(A)/MAX6703(A)/MAX6705(A)/ V Falling to WDO Delay 5 s CC MAX6706(A)/MAX6707(A) T = -40C to +85C 602 618 634 PFI, RST IN1, RST IN2 A V = 1.8V to 5.5V mV CC Threshold T = -40C to +125C 593 642 A PFI Hysteresis 6 mV Maxim Integrated 2 www.maximintegrated.com