MAX700 MAXIM | Alldatasheet

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Power-Supply Monitor with Reset General Description Features = The MAX700/701/702 are supervisory circuits used to. @ Min 200ms RESET Pulse on Power-Up, b monitor the power supplies in wP and digital systems. The Power-Down, and During Low-Voltage Conditions RESET/RESET outputs of the MAX700/701/702 are guar- —- Reset Threshold Factory Trimmed for +5V *< anteed to be in the correct state for Vcc voltages down Systems | to +1V (Figure 4). They provide excellent circuit reliability —__ jo External Components or Adjustments With [S) and low cost by eliminating external components and +5V Powered Circuits ° adjustments when used with +5V Powered circuits. ¢ Debounced Manual Reset Input NS} The MAX702 is the simplest part in the family. When Voc djustable Voltage Detection (MAX7 falls to 4.65V, RESET goes low. The MAX702 also pro. @ Presetor Adjustable Voltage Detection (MAX700) — @y vides a debounced manual reset input. The MAX701 @ Adjustable Hysteresis (MAX700) = performs the same functions but has both RESET and —@ 8-Pin Plastic DIP and Narrow SO Packages RESET outputs. Their primary function is to provide a - system reset. Accordingly, an active reset signal is | ——— dering Information & supplied for low supply voltages and for at least 200ms PART TEMP. RANGE PIN-PACKAGE N after the supply voltage reaches its operating value. - -{ In addition to the feat f the MAX701 and MAX702 MAX7OOCPA OC to +70°C 8 Piastic DIP In addition to the features of the an a 7 — the MAX700 provides preset or adjustable voltage de- MAX700CSA OC 10 +70°C SNarrowSO___| tection so thresholds other than 4.65V can be selected MAX700C/D OC to +70°C Dice and adjustable hysteresis. All parts are supplied in 8-pin MAX700EPA -40°C to +85°C 8 Plastic DIP Plastic ot and Narrow SO packages in commercial and MAX700ESA -40°C to +85°C 8 Narrow SO extended temperatu ges . MAX701CPA. O'C to +70°C 8 Plastic DIP | Computers Controllers MAX701EPA -40°C to +85°C 8 Plastic DIP _] Intelligent Instruments MAX7O1ESA -40°C to +85°C @NarowSO | Automotive Systems MAX702CPA OC to +70C 8 Plastic DIP Critical wP Power Monitoring MAX702CSA_ OC to +70°C 8 Narrow SO. _| MAX702C/D OC to +70°C Dice MAX7O2EPA 40°C to¥85°C 8 Plastic DIP MAX702ESA _ -40°C to +85°C 8 Narrow so Pin Configurations TOP VIEW wat [a] vec wn 8] voc wa Li a] xc sense [2] MAIO [7] or. no [2] “aor” [Z)xc vool@| “Ayarooe [2 RSet HwsT [3 6 | RESET NOLS 6 | RESET ono [3 6] NC ono [4 5 | RESE eno [4 [5 | reser ne [4 [snc DIP/SO DIP/SO DIP/SO MAXI ‘Maxim integrated Products 1 Call toll free 1-800-998-8800 for free samples or literature.

Power-Supply Monitor with Reset = ABSOLUTE MAXIMUM RATINGS S vec 03V10+155V —_Raleof Rise, Voc 400Vis Voltage (with respect to GND) at RESET, RESET. HYST, Power Dissipation, any package 380m CTL, SENSE -0.3V to Vee Storage Temperature Range 65°C to +150°C YF Operaiing Temperature Range Lead Temperature (Soldering, 10 sec.) 300C ° MAX70_C 0'°C to +70°C MaX70_E 40°C t0 485°C IN 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 © _eefications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect the device reliabilly. IN ELECTRICAL CHARACTERISTICS *< (Ta = 25°C, Voc = +5V, CTL = GND on MAX700, unless otherwise noted.) < PARAMETER CONDITIONS MIN TYP MAX | UNITS = Vcc, Monitor Voltage Range Ta = Twin to TMax 3 15 v MAX700 Only CTL= Vee : Min Vcc For Valid Reset Ta = Tun to Tmax 15 1 v Output, Deciining Supply RESET <0.4V when sinking tmA _ 7 Supply Current 700 200 A Reset Threshold Powerup Ta = Twn to TMax 45 4654.75 v Power-down 45 462475 _ Internal Hysteresis HYST not connected it _ 30 mv Reset Output Puise Width 200350800 ms RESET Fall Time _ MAX700/701 Only, CLoap = 100pF 200 ns Voc Pulse Duration Guaranteeing No Reset SV to 4V Voc Pulse 10 1 HS Reset : 100 10 MR Input Threshold _ or Vv MR Pulluo Current _ | 6 “30 WA MAX700 _ RESET Output Low Isink = 3.2mA, Voc = 5V oa IsiNk = 1.6mA, Vcc = 3V 04 RESET Output High ISOURCE = 3.2mA, Voc = 4.25V Voc-0.4 v IsouRcE = 1.6mA, Voc = 3V Voc-0.4 _ ISQURCE = 0.5MA, Voc = 1.5V Voc-0.4 | RESET Output Low ISINK = 16MA, Voc = 4.25V. 04 ‘ ISINK = 1.6MA, Veo = 3V 04 i ISINK = O.4mA, VoG = 1.5V 04 v | RESET Output High SOURCE = 3.2mA, Veo = 5V | Voo-0.4 ISQURCE = 1.6MA, Voc = 3V | Vec-0.4 MAX701 RESET Output Low ‘sink = 16mA, Voc = 5V 04 RESET Output High 'soURCE = 3.2MA, Voc = 4.25V Vco-0.4 v ISOURGE = 16mA\\ Voc = 3V Vec-0.4 ISOURCE = 0.SMA, Voc = 1.5V Voc-0.4 RESET Output Low ISINK = 3.2MA, Voc = 4.25V 04 Isink = T6MA, Voc = 3V 04 v — Isinx = O.4mA, VGC = 1.5V 8a RESET Output High IsouRcE = 3.2mA, Veo = 5V Veo-0.4 Qo AA AXLAN

Power-Supply Monitor with Reset ELECTRICAL CHARACTERISTICS (continued) = (Tn = 25°C, Voc = +5V, CTL = GND on MAX700, unless otherwise noted.) > - PARAMETER CONDITIONS MIN Typ Max | NTS | 3 waxroe Co AN RESET Output Low IsiNK = 3.2mA, Voc = 4.25V 04 3° ISINK = 1.6MA, Voc = 3V 04 v S — Isink = 0.4mA, Voc = 1.5 04 RESET Output High IsouRce = 3.2mA, Vcc = 5V Vec-0.4 qQ MAX700 ONLY (CTL = Vcc, unless otherwise noted.) . 3° SENSE Input Threshold Ta= Tanto Tax 125129138 v = SENSE Input Current on nA Sy HYST Input On Resistance _ 05 «a 3 CTL Input Threshold _ _ 2 Vv IX} CTL Pulldown Current _ 30 100 WA _CiPin Description Voc | Chip power and +5V sensing inout (when CTL = GND on MAX700) GND Ground RESET | Goes low when Vcc falls below 4.65V, or when CTL = Vcc on the MAX700 goes low when SENSE falls below 1.9V RESET MAX700, 701 only ~ Inverted Version of RESET. MR Input for manual push button reset. Has inter- nal 5A pull up. Low input activates the RESET/RESET outputs. CTL MAX700 only - When CTL = GND. Vcc is moni- | tored by the reset circuit, When CTL = Voc. Voc is ignored and SENSE is monitored, allowing the threshold to be set with external resistors. HYST MAX700 only — Normally NOT used when volt- ‘age is monitored through Voc (CTL. = GND) When monitoring through SENSE (CTL = Vcc), HYST allows hysteresis to be added, reducing | nose and spurious reset activity (Figure 3). HYST tums on 5us before the RESET/RESET outputs are activated, and its on resistance to GND is typi- cally 10. SENSE | MAX700 only ~The voltage sense input when | CTL = Vcc. Its threshold is 1.29V. Sense al- ways remains connected to the internal compa- rator. So, when Voc is being monitored internally (CTL = GND), SENSE should be left open circuit MAAKI/vb — (8