Datasheet MAX6701, MAX6701A, MAX6702, MAX6702A, MAX6703, MAX6703A, MAX6704, MAX6705, MAX6705A, MAX6706, MAX6706A, MAX6707, MAX6707A, MAX6708 (Analog Devices)

MAX6701-08/ Low-Voltage, SOT23 µP Supervisors with Power-Fail MAX6701A-03A/ In/Out, Manual Reset, and Watchdog Timer MAX6705A-07A General Description Features
The MAX6701–MAX6708 microprocessor (µP) supervisory ● Small 8-Pin SOT23 Package circuits reduce the complexity and components required ● Precision Monitoring of +5.0V, +3.3V, +3.0V, +2.5V to monitor power-supply functions in µP systems. These Supply Voltages 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 The MAX6701−MAX6708 family provides four func- Inputs Down to 0.62V (MAX6704−MAX6708) tions: a reset output during power-up, power-down, and ● Dual Adjustable Reset Input for Triple-Voltage brownout conditions; an independent watchdog output Monitoring (MAX6701(A)/MAX6702(A)/MAX6703(A)) 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 The MAX6701–MAX6708 family offers several pinout (MAX6701(A)/MAX6702(A)/MAX6703(A)/ options to accommodate a variety of multivoltage micro- MAX6705(A)/MAX6706(A)/MAX6707(A)) processor supervision applications. ● Manual Reset Input The MAX6701(A)/MAX6702(A)/MAX6703(A) monitor ● Four Reset Output Stage Options three supply voltages (one fixed threshold and two Active Low Push-Pull (MAX6701(A), MAX6705(A)) 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 VCC = 1V includes an independent adjustable power-fail-in/power- ● Immune to Short Falling V fail-out comparator, a manual reset input, and a reset- CC Transients based watchdog timer. The MAX6705(A)/MAX6706(A)/ ● Low Cost, Few External Components MAX6707(A) monitor a single-supply voltage to drive
Ordering Information
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 -40°C to +125°C 8 SOT23 manual reset input, and a watchdog timer with an inde- pendent output. The MAX6708 is the same as the MAX6701A_KA-T -40°C to +125°C 8 SOT23 MAX6704 but without the watchdog timer function. Insert the desired suffix letter (from the Threshold Suffix Guide 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 non-A and A versions. typically held on standard versions only. Contact factory for availability.
Applications
Devices are available in both leaded and lead-free packaging. Specify lead-free by replacing “-T” with “+T” when ordering. ● Computers ● Networking
Ordering Information continued at end of data sheet.
● Controllers ● Telecommunications
Pin Configurations
● Intelligent Instruments ● Critical µP Power TOP VIEW MR 1 8 WDO Monitoring VCC 2 7 RESET (RESET) ● White Goods MAX6701(A) 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.
( ) ARE FOR MAX6702(A) ONLY.
SOT23
Pin Configurations continued at end of data sheet. 19-1952; Rev 4; 5/14