MAX823/MAX824/MAX825 V CC PART TEMP. RANGE PIN-PACKAGE MAX824_EUK. -40 C to +85 C

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1 ; Rev 1; 6/97 µ µ µ µ PART TEMP. RANGE PIN-PACKAGE _EUK MAX824_EUK -40 C to +85 C -40 C to +85 C 5 SOT SOT23-5 MAX825_EUK -40 C to +85 C 5 SOT23-5 Insert the desired suffix letter (from the table below) into the blank to complete the part number. FUNCTION MAX824 MAX825 Active-Low Reset Active-High Reset Watchdog Input Manual-Reset Input SUFFIX THRESHOLD () L 4.63 M 4.38 T 3.08 S 2.93 R 2.63 TOP IEW MAX824 2 MAX825 MR MR SOT23-5 SOT23-5 SOT23-5 Maxim Integrated Products 1

2 ABSOLUTE MAXIMUM RATINGS to +6.0 All Other Pins to ( + 0.3) Input Current, All Pins Except and...20ma Output Current,,...20mA Rate of Rise,...100/µs Continuous Power Dissipation (T A = +70 C) SOT23-5 (derate 7.1mW/ C above +70 C)...571mW 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 Operating Temperature Range MAX82_EUK C to +85 C Storage Temperature Range C to +160 C Lead Temperature (soldering, 10sec) C ( = to +5.5 for MAX82_L, = +4.5 to +5.5 for MAX82_M, = to +3.6 for MAX82_T, = +3 to +3.6 for MAX82_S, = +2.7 to +3.6 for MAX82_R, T A = T MIN to T MAX, unless otherwise noted. Typical values are at.) (Note 1) Operating oltage Range Supply Current PARAMETER Reset Threshold Reset Threshold Hysteresis Reset Threshold Temperature Coefficient Reset Timeout Period SYMBOL CONDITIONS MIN TYP MAX T A = 0 C to +70 C T A = -40 C to +85 C 1.2 I SUPPLY RST and MR unconnected MR unconnected MAX82_L MAX82_M MAX82_T MAX82_S MAX82_R MAX82_L/M MAX82_T/S/R MAX82_L/M MAX82_T/S/R L/M, MAX824L/M T/S/R, MAX824T/S/R MAX825L/M MAX825T/S/R T A = -40 C to +85 C T A = -40 C to +85 C T A = -40 C to +85 C T A = -40 C to +85 C T A = -40 C to +85 C UNITS µa m ppm/ C ms 2

3 ELECTRICAL CHARACTERISTICS (continued) ( = to +5.5 for MAX82_L, = +4.5 to +5.5 for MAX82_M, = to +3.6 for MAX82_T, = +3 to +3.6 for MAX82_S, = +2.7 to +3.6 for MAX82_R, T A = T MIN to T MAX, unless otherwise noted. Typical values are at.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MAX82_L/M, = RST max, I SOURCE = 120µA Output oltage Output Short-Circuit Current (Note 2) Output oltage OH OL I SOURCE OH OL to Delay WATCHDOG INPUT (/MAX824) Watchdog Timeout Period t WD Pulse Width t MAX82_T/S/R, = RST max, I SOURCE = 30µA MAX82_L/M, = RST min, I SINK = 3.2mA MAX82_T/S/R, = RST min, I SINK = 1.2mA T A = 0 C to +70 C, = 1, falling, I SINK = 50µA T A = -40 C to +85 C, = 1.2, falling, BATT = 0, I SINK = 100µA MAX82_L/M, = 0, = 5.5 MAX82_T/S/R, = 0, = 3.6 > 1.8, I SOURCE = 150µA MAX824L/M, MAX825L/M, = RST max, I SINK = 3.2mA MAX824T/S/R, MAX825T/S/R, = RST max, I SINK = 1.2mA RST - = 100m IL = 0.4, IH = µa µs sec ns Input Threshold (Note 3) IL IH = Input Current (Note 4) =, time average = 0, time average µa MANUAL- INPUT (/MAX825) MR Input Threshold IL IH MR Pulse Width 1.0 µs MR Noise Immunity (pulse width with no reset) 100 ns MR to Reset Delay 500 ns MR Pull-Up Resistance (internal) kω Note 1: Over-temperature limits are guaranteed by design and not production tested. Note 2: The short-circuit current is the maximum pull-up current when is driven low by a µp bidirectional reset pin. Note 3: is internally serviced within the watchdog period if is left unconnected. Note 4: The input current is specified as the average input current when the input is driven high or low. The input is designed to drive a three-stated-output device with a 10µA maximum leakage current and a maximum capacitive load of 200pF. This output device must be able to source and sink at least 200µA when active. 3

4 (L, = +5,, unless otherwise noted.) SUPPLY CURRENT (ma) WATCHDOG TIMEOUT PERIOD (sec) SUPPLY CURRENT vs. TEMPERATURE WATCHDOG TIMEOUT PERIOD vs. TEMPERATURE /4/5-01 /4/5-04 TIMEOUT PERIOD (ms) NORMALIZED THRESHOLD () TIMEOUT PERIOD vs. TEMPERATURE NORMALIZED THRESHOLD OLTAGE vs. TEMPERATURE /4/5-02 /4/5-05 PROPAGATION DELAY (ms) TRANSIENT DURATION (ms) COMPARATOR PROPAGATION DELAY vs. TEMPERATURE FALLING MAXIMUM TRANSIENT DURATION vs. THRESHOLD OERDRIE OCCURS ABOE CURE THRESHOLD OERDRIE (m), RST - /4/5-03 /4/5-06 4

5 MAX MR MR MR MR MR MR MAX MAX824 MAX GENERATOR (MAX824/MAX825 ONLY) MR (/MAX825 ONLY) (/MAX824 ONLY) WATCHDOG TRANSITION DETECTOR WATCHDOG TIMER 5

6 µ µ µ µ MR MR MR MR MR MR µ MR µ µ µ µ 1 RST RST 1 t RST * t RD t WD t RD * ON THE MAX824/MAX825 IS THE INERSE OF. 6

7 µ µµ µ µ µ µ START GENERATOR MAX824 MAX825 CC I SOURCE MAX = 800mA L, M 400mA T, S, R mp SET HIGH PROGRAM CODE SUBROUTINE OR PROGRAM LOOP SET LOW RETURN µ 7

8 MANUAL MR I/O mp TRANSISTOR COUNT: 607 MARKING INFORMATION (TOP) XXXX AAAI = L AAAJ = M AAAK = T AAAL = S AAAM = R AAAN = MAX824L AAAO = MAX824M AAAP = MAX824T AAAQ = MAX824S AAAR = MAX824R AAAS = MAX825L AAAT = MAX825M AAAU = MAX825T AAA = MAX825S AAAW = MAX825R SOT5L.EPS 8 Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA (408) Maxim Integrated Products is a registered trademark of Maxim Integrated Products.

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