MAX700_08 MAXIM | Alldatasheet

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Technical content

Features

♦ Min 200ms RESET Pulse on Power-Up, Power- Down, and During Low-Voltage Conditions ♦ Reset Threshold Factory Trimmed for +5V Systems ♦ No External Components or Adjustments with +5V-Powered Circuits ♦ Debounced Manual Reset Input ♦ Preset or Adjustable Voltage Detection (MAX700) ♦ Adjustable Hysteresis (MAX700) ♦ 8-Pin PDIP and Narrow SO Packages MAX700/MAX701/MAX702 Power-Supply Monitor with Reset 19-2690; Rev 2; 12/07 For pricing delivery, and ordering information please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. RESET RESETGND VCC CTLSENSE HYST MR DIP/SO TOP VIEW MAX700 RESET RESET GND VCC N.C.N.C. N.C. MR DIP/SO MAX701 N.C. N.C. RESET GND N.C. VCC N.C. MR DIP/SO MAX702 Pin Configurations

Ordering Information

PART* TEMP RANGE PIN-PACKAGE MAX700C/D 0°C to +70°C Dice MAX700CPA 0°C to +70°C 8 PDIP MAX700CSA 0°C to +70°C 8 Narrow SO MAX700EPA -40°C to +85°C 8 PDIP MAX700ESA -40°C to +85°C 8 Narrow SO MAX701C/D 0°C to +70°C Dice MAX701CPA 0°C to +70°C 8 PDIP MAX701CSA 0°C to +70°C 8 Narrow SO MAX701EPA -40°C to +85°C 8 PDIP MAX701ESA -40°C to +85°C 8 Narrow SO MAX702C/D 0°C to +70°C Dice MAX702CPA 0°C to +70°C 8 PDIP MAX702CSA 0°C to +70°C 8 Narrow SO MAX702EPA -40°C to +85°C 8 PDIP MAX702ESA -40°C to +85°C 8 Narrow SO *Devices in PDIP and SO packages are available in both lead- ed and lead-free packaging. Specify lead free by adding the + symbol at the end of the part number when ordering.

Power-Supply Monitor with Reset ABSOLUTE MAXIMUM RATINGS 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 specificatio ns is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Voltage (with respect to GND) at RESET, RESET, Operating Temperature Range Rate of Rise, V

ELECTRICAL CHARACTERISTICS

(VCC = +5V, CTL = GND on MAX700, TA = +25°C, unless otherwise noted.) PARAMETER CONDITIONS MIN TYP MAX UNITS VCC Monitor Voltage Range (MAX700 Only) TA = TMIN to TMAX, CTL = VCC 31 5 V Min VCC for Valid Reset Output, Declining Supply TA = TMIN to TMAX, RESET ≤ 0.4V when sinking 1mA 1.5 1 V Supply Current 100 200 µA Internal Hysteresis HYST not connected 30 mV Reset Output Pulse Width 200 350 500 ms RESET Fall Time MAX700/MAX701 only, C LOAD = 100pF 200 ns No reset 10 1VCC Pulse Duration Guaranteeing 5V to 4V V CC pulse Reset 100 10 µs MR Input Threshold 0.7 V MR Pullup Current -5 -30 µA MAX700 ISINK = 3.2mA, VCC = 5V 0.4RESET Output Low ISINK = 1.6mA, VCC = 3V 0.4 V ISOURCE = 3.2mA, VCC = 4.25V VCC - 0.4 ISOURCE = 1.6mA, VCC = 3V VCC - 0.4RESET Output High ISOURCE = 0.5mA, VCC = 1.5V VCC - 0.4 V ISINK = 16mA, VCC = 4.25V 0.4 ISINK = 1.6mA, VCC = 3V 0.4RESET Output Low ISINK = 0.4mA, VCC = 1.5V 0.4 V ISOURCE = 3.2mA, VCC = 5V VCC - 0.4 RESET Output High ISOURCE = 1.6mA, VCC = 3V VCC - 0.4 V

Power-Supply Monitor with Reset PARAMETER CONDITIONS MIN TYP MAX UNITS MAX701 RESET Output Low I SINK = 16mA, VCC = 5V 0.4 V ISOURCE = 3.2mA, VCC = 4.25V VCC - 0.4 ISOURCE = 1.6mA, VCC = 3V VCC - 0.4RESET Output High ISOURCE = 0.5mA, VCC = 1.5V VCC - 0.4 V ISINK = 3.2mA, VCC = 4.25V 0.4 ISINK = 1.6mA, VCC = 3V 0.4RESET Output Low ISINK = 0.4mA, VCC = 1.5V 0.4 V RESET Output High I SOURCE = 3.2mA, VCC = 5V VCC - 0.4 V MAX702 ISINK = 3.2mA, VCC = 4.25V 0.4 ISINK = 1.6mA, VCC = 3V 0.4RESET Output Low ISINK = 0.4mA, VCC = 1.5V 0.4 V RESET Output High I SOURCE = 3.2mA, VCC = 5V VCC - 0.4 V MAX700 ONLY (CTL = VCC, unless otherwise noted) SENSE Input Threshold T A = TMIN to TMAX 1.25 1.29 1.35 V SENSE Input Current 0.1 nA HYST Input On-Resistance 0.5 k Ω CTL Input Threshold 2V CTL Pulldown Current 30 100 µA ELECTRICAL CHARACTERISTICS (continued) (VCC = +5V, CTL = GND on MAX700, TA = +25°C, unless otherwise noted.)

Power-Supply Monitor with Reset Pin Description PIN MAX700 MAX701 MAX702 NAME FUNCTION 111 M R Input for Manual Pushbutton Reset. Has internal 5µA pullup. Low input activates the RESET/RESET outputs. 2 — — SENSE The voltage-sense input when CTL = VCC. Its threshold is 1.29V. SENSE always remains connected to the internal comparator. So, when VCC is being monitored internally (CTL = GND), SENSE should be left open circuit. 3 — — HYST Normally NOT used when voltage is monitored through VCC (CTL = GND). When monitoring through SENSE (CTL = VCC), HYST allows hysteresis to be added, reducing noise and spurious reset activity (Figure 3). HYST turns on 5µs before the RESET/RESET outputs are activated, and its on-resistance to GND is typically 1kΩ. 4 4 3 GND Ground 567 RESET Goes low when VCC falls below 4.65V, or when CTL = VCC on the MAX700 goes low when SENSE falls below 1.29V. 6 5 — RESET Inverted Version of RESET 7 — — CTL When C TL = GN D , V C C i s m oni tor ed b y the r eset ci r cui t. When C TL = V C C , V C C i s i g nor ed and S E N S E i s m oni tor ed , al l ow i ng the thr eshol d to b e set w i th exter nal r esi stor s.

882 V CC Chip Power and +5V Sensing Input (When CTL = GND on MAX700)

— 2, 3, 7 4, 5, 6, 8 N.C. No Connection

Power-Supply Monitor with Reset Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circu it patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2008 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.

Revision History

0 3/90 Initial release — 1 11/05 Added lead-free information to the Ordering Information table. 1 2 12/07 Updated Pin Description table. 4