MAX813LMJA

Click here for production status of specific part numbers. MAX705–MAX708/MAX813L General Description The MAX705–MAX708/MAX813L microprocessor (µP) supervisory circuits reduce the complexity and number of components required to monitor power-supply and battery functions in µP systems. These devices significantly improve system reliability and accuracy compared to separate ICs or discrete components. The MAX705/MAX706/MAX813L provide four functions: 1) A reset output during power-up, power-down, and brownout conditions. 2) An independent watchdog output that goes low if the watchdog input has not been toggled within 1.6 seconds. 3) A 1.25V threshold detector for power-fail warning, lowbattery detection, or for monitoring a power supply other than +5V. 4) An active-low manual-reset input. The MAX707/MAX708 are the same as the MAX705/ MAX706, except an active-high reset is substituted for the watchdog timer. The MAX813L is the same as the MAX705, except RESET is provided instead of RESET. Two supply-voltage monitor levels are available: The MAX705/MAX707/MAX813L generate a reset pulse when the supply voltage drops below 4.65V, while the MAX706/ MAX708 generate a reset pulse below 4.40V. All four parts are available in 8-pin DIP, SO, and µMAX® packages. Applications ●● ●● ●● ●● Computers Controllers Intelligent Instruments Critical μP Power Monitoring Pin Configurations appear at end of data sheet. Low-Cost, μP Supervisory Circuits Benefits and Features ●● Supervisory-Function Integration Significantly Improves System Reliability While Reducing Board Space • μMAX Package • Guaranteed RESET Valid at VCC = 1V -- 200ms Reset Pulse Width -- Debounced TTL/CMOS-Compatible ManualReset Input -- Active-High Reset Output (MAX707/MAX708/ MAX813L) • Precision-Supply Voltage Monitor -- 4.65V (MAX705/MAX707/MAX813L) -- 4.40V (MAX706/MAX708) • Voltage Monitor for Power-Fail or Low-Battery Warning Ordering Information PART TEMP RANGE PIN-PACKAGE MAX705CPA 0°C to +70°C 8 Plastic DIP MAX705CSA 0°C to +70°C 8 SO MAX705CUA 0°C to +70°C 8 μMAX MAX705C/D 0°C to +70°C Dice* *Dice are specified at TA = +25°C. **Contact factory for availability and processing to MIL-STD-883. Devices in PDIP, SO, and μMAX packages are available in both leaded and lead(Pb)-free/RoHS-compliant packaging. Specify lead-free by adding the + symbol at the endof the part number when ordering. Lead-free packaging is not available for CERDIP packages. Ordering Information continued at end of data sheet. Typical Operating Circuit UNREGULATED DC MAX667 +5V DC LINEAR REGULATOR µP VCC PFI µMAX is a registered trademark of Maxim Integrated Products, Inc. 19-4334; Rev. 11; 7/18 PUSHBUTTON SWITCH RESET PFI MAX705 WDO MR MAX706 PFO MAX813L VCC RESET I/O LINE NMI INTERRUPT MAX705–MAX708/MAX813L MAX705–MAX708/MAX813L Low-Cost, μP Supervisory Circuits Absolute Maximum Ratings Terminal Voltage (with respect to GND) VCC......................................................................-0.3V to 6.0V All Other Inputs (Note 1) ...................... -0.3V to (VCC + 0.3V) Input Current VCC..................................................................................20mA GND ................................................................................20mA Output Current (all outputs).................................................20mA Continuous Power Dissipation (TA = +70°C) Plastic DIP (derate 9.09mW/°C above +70°C).............727mW SO (derate 5.88mW/°C above +70°C).........................471mW μMAX (derate 4.10mW/°C above +70°C)....................330mW CERDIP (derate 8.00mW/°C above +70°C).................640mW Operating Temperature Ranges MAX70_C__, MAX813LC__................................0°C to +70°C MAX70_E__, MAX813LE__ ........................... -40°C to +85°C MAX70_MJA.................................................. -55°C to +125°C Storage Temperature Range............................. -65°C to +160°C Lead Temperature (soldering, 10s).................................. +300°C Soldering Temperature (reflow) Lead(Pb)-free...............................................................+260°C Containing Lead(Pb).....................................................+240°C Note 1: The input-voltage limits on PFI and MR can be exceeded if the input current is less than 10mA. 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 (VCC = 4.75V to 5.5V for MAX705/MAX707/MAX813L, VCC = 4.5V to 5.5V for MAX706/MAX708, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER Operating Voltage Range Supply Current SYMBOL VCC ISUPPLY CONDITIONS MIN VRT 1.0 5.5 MAX813LC 1.1 5.5 MAX70_E/M, MAX813LE/M 1.2 150 350 MAX705E/M, MAX706E/M, MAX813LE/M 150 500 MAX707C, MAX708C 50 350 50 500 MAX705, MAX707, MAX813L 4.50 4.65 4.75 MAX706, MAX708 4.25 4.40 4.50 40 tRS 140 ISOURCE = 800μA RESET Output Voltage µA V 280 ms VCC - 1.5 MAX70_C, VCC = 1V, ISINK = 50μA 0.3 MAX70_E/M, VCC = 1.2V, ISINK = 100μA 0.3 0.4 MAX813LC, ISOURCE = 4μA, VCC = 1.1V 0.8 MAX813LE/M, ISOURCE = 4μA, VCC = 1.2V 0.9 ISOURCE = 800μA ISINK = 3.2mA V VCC - 1.5 MAX707, MAX708, ISINK = 1.2mA www.maximintegrated.com 200 0.4 MAX813L V mV ISINK = 3.2mA MAX707, MAX708, ISOURCE = 800μA RESET Output Voltage UNITS 5.5 MAX705C, MAX706C, MAX813LC Reset Threshold Hysteresis (Note 2) Reset Pulse Width (Note 2) MAX MAX70_C MAX707E/M, MAX708E/M Reset Threshold (Note 2) TYP V VCC - 1.5 0.4 Maxim Integrated │  2 MAX705–MAX708/MAX813L MAX705–MAX708/MAX813L Low-Cost, μP Supervisory Circuits Electrical Characteristics (continued) (VCC = 4.75V to 5.5V for MAX705/MAX707/MAX813L, VCC = 4.5V to 5.5V for MAX706/MAX708, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX 1.60 2.25 Watchdog Timeout Period tWD MAX705, MAX706, MAX813L 1.00 WDI Pulse Width tWP VIL = 0.4V, VIH = (VCC) (0.8) 50 WDI Input Threshold Low MAX705, MAX706, MAX813L, VCC = 5V High MAX705, MAX706, MAX813L, WDI = 0V MAX705, MAX706, MAX813L, ISOURCE = 800μA WDO Output Voltage MR = 0V MR Pulse Width MR Input Threshold tMR 50 -150 150 -50 VCC - 1.5 100 250 600 tMD ISOURCE = 800μA μA ns 2.0 VCC = 5V µA V 0.8 High V 0.4 150 PFI Input Current PFO Output Voltage 3.5 Low MR to Reset Out Delay (Note 2) PFI Input Threshold 0.8 MAX705, MAX706, MAX813L, ISINK = 1.2mA MR Pull-Up Current s ns MAX705, MAX706, MAX813L, VCC = 5V WDI Input Current UNITS V 250 ns 1.20 1.25 1.30 V -25.00 +0.01 +25.00 nA VCC - 1.5 ISINK = 3.2mA 0.4 V Note 2: Applies to both RESET in the MAX705–MAX708 and RESET in the MAX707/MAX708/MAX813L. www.maximintegrated.com Maxim Integrated │  3 MAX705–MAX708/MAX813L MAX705–MAX708/MAX813L Low-Cost, μP Supervisory Circuits Typical Operating Characteristics MAX705/MAX707 RESET OUTPUT VOLTAGE vs. SUPPLY VOLTAGE MAX705 toc01 MAX705/MAX707 RESET RESPONSE TIME MAX705 toc02 +5V TA = +25°C 1V/div VCC +5V VCC TA = +25°C PFO VCC GND PFI POWER-FAIL COMPARATOR ASSERTION RESPONSE TIME +5V +5V RESET RESET GND VCC = +5V TA = +25°C 10kΩ 10k 330pF VCC 0V +5V RESET 400ns/div +5V +5V VCC +4V VCC RESET 0V GND 330pF 10kΩ +4V 330pF 10kΩ 1V/div RESET 0V 0V 500ms/div www.maximintegrated.com MAX705 toc08 +5V 1V/div VCC RESET GND 400ns/div MAX813L RESET RESPONSE TIME TA = +25°C VCC 330pF 0V 400ns/div MAX707/MAX708/MAX813L RESET OUTPUT VOLTAGE vs. SUPPLY VOLTAGE MAX705 toc07 10k 330pF 330pF RESET +1.20V 0V 0V RESET RESET GND RESET 10kΩ 2V/div VCC VCC = VRT TA = +25°C +5V 1V/div 0V 0V 50mV/div PFI 1V/div +1.30V MAX705 toc06 MAX705 toc05 RESET 30pF +1.25V MAX707 RESET, RESET DE-ASSERTION VCC = VRT TA = +25°C +5V 1kΩ 400ns/div MAX707 RESET, RESET ASSERTION MAX705 toc04 PFO +1.20V 2µs/div 500ms/div +5V +3V +1.30V RESET 30pF 0V PFI 1kΩ 30pF 0V 10kΩ RESET RESET 0V PFO +1.25V 1V/div GND RESET 330pF 1V/div RESET RESET VCC 2kΩ VCC = +5V TA = +25°C PFO +4V +5V VCC VCC MAX705 toc08 +5V PFI +5V 0V POWER-FAIL COMPARATOR DE-ASSERTION RESPONSE TIME 2µs/div Maxim Integrated │  4 MAX705–MAX708/MAX813L MAX705–MAX708/MAX813L Low-Cost, μP Supervisory Circuits Pin Description PIN MAX705/MAX706 MAX707/MAX708 DIP/SO DIP/SO μMAX μMAX MAX813L DIP/SO NAME FUNCTION MR Manual-Reset Input triggers a reset pulse when pulled below 0.8V. This active-low input has an internal 250μA pullup current. It can be driven from a TTL or CMOS logic line, as well as shorted to ground with a switch. μMAX 1 3 1 3 1 3 2 4 2 4 2 4 VCC +5V Supply Input 3 5 3 5 3 5 GND 0V Ground Reference for all signals 4 6 4 6 4 6 PFI Power-Fail Voltage-Monitor Input. When PFI is less than 1.25V, PFO goes low. Connect PFI to GND or VCC when not used. 5 7 5 7 5 7 PFO Power-Fail Output goes low and sinks current when PFI is less than 1.25V; otherwise PFO stays high. 6 8 — — 6 8 WDI Watchdog Input. If WDI remains high or low for 1.6sec, the internal watchdog timer runs out and WDO goes low (Figure 1). Floating WDI or connecting WDI to a high-impedance three-state buffer disables the watchdog feature. The internal watchdog timer clears whenever reset is asserted, WDI is three stated, or WDI sees a rising or falling edge. — — 6 — — — N.C. No Connect 7 8 — 1 2 — www.maximintegrated.com 7 — 8 1 — 2 — 8 7 — 2 1 RESET Active-Low Reset Output pulses low for 200ms when triggered, and stays low whenever VCC is below the reset threshold (4.65V in the MAX705 and 4.40V in the MAX706). It remains low for 200ms after VCC rises above the reset threshold or MR goes from low to high (Figure 3). A watchdog timeout will not trigger RESET unless WDO is connected to MR. WDO Watchdog Output pulls low when the internal watchdog timer finishes its 1.6sec count and does not go high again until the watchdog is cleared. WDO also goes low during low-line conditions. Whenever VCC is below the reset threshold, WDO stays low; however, unlike RESET, WDO does not have a minimum pulse width. As soon as VCC rises above the reset threshold, WDO goes high with no delay. RESET Active-High RESET Output is the inverse of RESET. Whenever RESET is high, RESET is low, and vice versa (Figure 2). The MAX813L has a RESET output only. Maxim Integrated │  5 MAX705–MAX708/MAX813L WDI 6 WATCHDOG TRANSITION DETECTOR WATCHDOG TIMER MAX705–MAX708/MAX813L Low-Cost, μP Supervisory Circuits 8 VCC WDO VCC 250µA MR VCC 250µA TIMEBASE FOR RESET AND WATCHDOG MR RESET GENERATOR 2 MAX705 MAX706 MAX813L 4 7 RESET (RESET) PFI 5 7 RESET GENERATOR 2 4.65V* 4 RESET MAX707 MAX708 5 PFO PFO 1.25V 1.25V * 4.40V FOR MAX7O6. ( ) ARE FOR MAX813L ONLY. VCC RESET 1 1 4.65V* PFI 8 3 GND * 4.40V FOR MAX7O6. 3 GND Figure 1. MAX705/MAX706/MAX813L Block Diagram Figure 2. MAX707/MAX708 Block Diagram Detailed Description stated, WDO goes low. As long as RESET is asserted or the WDI input is three stated, the watchdog timer stays cleared and will not count. As soon as reset is released and WDI is driven high or low, the timer starts counting. Pulses as short as 50ns can be detected. Reset Output A microprocessor’s (μP’s) reset input starts the μP in a known state. Whenever the μP is in an unknown state, it should be held in reset. The MAX705–MAX708/MAX813L assert reset during power-up and prevent code execution errors during power-down or brownout conditions. On power-up, once VCC reaches 1V, RESET is a guaranteed logic low of 0.4V or less. As VCC rises, RESET stays low. When VCC rises above the reset threshold, an internal timer releases RESET after about 200ms. RESET pulses low whenever VCC dips below the reset threshold, i.e. brownout condition. If brownout occurs in the middle of a previously initiated reset pulse, the pulse continues for at least another 140ms. On power-down, once VCC falls below the reset threshold, RESET stays low and is guaranteed to be 0.4V or less until VCC drops below 1V. The MAX707/MAX708/MAX813L active-high RESET output is simply the complement of the RESET output, and is guaranteed to be valid with VCC down to 1.1V. Some μPs, such as Intel’s 80C51, require an active-high reset pulse. Watchdog Timer The MAX705/MAX706/MAX813L watchdog circuit monitors the μP’s activity. If the μP does not toggle the watchdog input (WDI) within 1.6sec and WDI is not three www.maximintegrated.com Typically, WDO is not connected to the nonmaskable interrupt input (NMI) of a μP. When VCC drops below the reset threshold, WDO goes low whether or not the watchdog timer has timed out yet. Normally this would trigger an NMI interrupt, but RESET goes low simultaneously, and thus overrides the NMI interrupt. If WDI is left unconnected, WDO can be used as a lowline output. Since floating WDI disables the internal timer, WDO goes low only when VCC falls below the reset threshold, thus functioning as a low-line output. The MAX705/MAX706 have a watchdog timer and a RESET output. The MAX707/MAX708 have both activehigh and active-low reset outputs. The MAX813L has both an active-high reset output and a watchdog timer. Manual Reset The manual-reset input (MR) allows reset to be triggered by a pushbutton switch. The switch is effectively debounced by the 140ms minimum reset pulse width. MR is TTL/CMOS-logic compatible, so it can be driven by an external logic line. MR can be used to force a watchdog timeout to generate a reset pulse in the MAX705/ MAX706/ MAX813L. Simply connect WDO to MR. Maxim Integrated │  6 MAX705–MAX708/MAX813L MAX705–MAX708/MAX813L Low-Cost, μP Supervisory Circuits Power-Fail Comparator The power-fail comparator can be used for various purposes because its output and noninverting input are not internally connected. The inverting input is internally connected to a 1.25V reference. To build an early-warning circuit for power failure, connect the PFI pin to a voltage divider (see Typical Operating Circuit). Choose the voltage divider ratio so that the voltage at PFI falls below 1.25V just before the +5V regulator drops out. Use PFO to interrupt the μP so it can prepare for an orderly power-down. Applications Information tWP tWD tWD +5V WDI +5V 0V +5V RESET 0V RESET EXTERNALLY TRIGGERED BY MR +5V tRS Monitoring Voltages Other Than the Unregulated DC Input 0V ( ) ARE FOR MAX813L ONLY. Figure 3. MAX705/MAX706/MAX813L Watchdog Timing VCC VRT VRT tRS tRS +5V RESET +5V 0V +5V tMD tMR WDO 0V Monitor voltages other than the unregulated DC by connecting a voltage-divider to PFI and adjusting the ratio appropriately. If required, add hysteresis by connecting a resistor (with a value approximately 10 times the sum of the two resistors in the potential divider network) between PFI and PFO. A capacitor between PFI and GND reduces the power-fail circuit’s sensitivity to high-frequency noise on the line being monitored. RESET can be asserted on other voltages in addition to the +5V VCC line. Connect PFO to MR to initiate a RESET pulse when PFI drops below 1.25V. Figure 6 shows the MAX705–MAX708 configured to assert RESET when the +5V supply falls below the reset threshold, or when the +12V supply falls below approximately 11V. Monitoring a Negative Voltage 0V MR Ensuring a Valid RESET Output Down to VCC = 0V When VCC falls below 1V, the MAX705–MAX708 RESET output no longer sinks current—it becomes an open circuit. High-impedance CMOS logic inputs can drift to undetermined voltages if left undriven. If a pulldown resistor is added to the RESET pin, as shown in Figure 5, any stray charge or leakage currents will be drained to ground, holding RESET low. Resistor value (R1) is not critical. It should be about 100kΩ, large enough not to load RESET and small enough to pull RESET to ground. 0V WDO (RESET) tWD MR EXTERNALLY DRIVEN LOW The power-fail comparator can also monitor a negative supply rail (Figure 7). When the negative rail is good (a negative voltage of large magnitude), PFO is low, and when the negative rail is degraded (a negative voltage of lesser magnitude), PFO is high. By adding the resistors and transistor as shown, a high PFO triggers a reset. As long as PFO remains high, the MAX705–MAX708/ MAX813L keep reset asserted (RESET = low, RESET = high). Note that this circuit’s accuracy depends on the PFI threshold tolerance, the VCC line, and the resistors. Figure 4. MAX705/MAX706 RESET, MR, and WDO Timing with WDI Three Stated. The MAX707/MAX708/MAX813L RESET output is the inverse of RESET shown. www.maximintegrated.com Maxim Integrated │  7 MAX705–MAX708/MAX813L MAX705–MAX708/MAX813L Low-Cost, μP Supervisory Circuits +12V +5V VCC 1MΩ 1% TO µP RESET MAX70_ MAX70_ MR 130kΩ 1% RESET PFI R1 Figure 5. RESET Valid to Ground Circuit GND PFO PARAMETER MIN TYP MAX UNIT +12V Reset Threshold at +25°C 10.67 10.87 11.50 V Figure 6. Monitoring Both +5V and +12V BUFFERED RESET TO OTHER SYSTEM COMPONENTS +5V 100kΩ VCC MR R1 MAX70_ VCC 100kΩ 2N3904 PFO PFI VCC MAX70_ RESET R2 GND RESET µP 4.7kΩ RESET TO µP GND VMR PFO GND +5V 0V Figure 6. Monitoring Both +5V and +12V +5V 0V VTRIP V5 – 1.25 R1 = 1.25 – VTRIP R2 , VTRIP < 0 Figure 7. Monitoring a Negative Voltage www.maximintegrated.com 0V Interfacing to μPs with Bidirectional Reset Pins μPs with bidirectional reset pins, such as the Motorola 68HC11 series, can contend with the MAX705–MAX708 RESET output. If, for example, the RESET output is driven high and the μP wants to pull it low, indeterminate logic levels may result. To correct this, connect a 4.7kΩ resistor between the RESET output and the μP reset I/O, as in Figure 8. Buffer the RESET output to other system components. Maxim Integrated │  8 MAX705–MAX708/MAX813L Ordering Information (continued) PART MAX705–MAX708/MAX813L Low-Cost, μP Supervisory Circuits Pin Configurations TEMP RANGE PIN-PACKAGE MAX705EPA -40°C to +85°C 8 Plastic DIP MR 1 MAX705ESA -40°C to +85°C 8 SO VCC 2 MAX705EUA -40°C to +85°C 8 μMAX GND 3 TOP VIEW PFI 4 MAX705MJA -55°C to +125°C 8 CERDIP** MAX706CPA 0°C to +70°C 8 Plastic DIP MAX706CSA 0°C to +70°C 8 SO MAX706CUA 0°C to +70°C 8 μMAX MR 1 Dice* VCC 2 MAX706C/D 0°C to +70°C MAX706EPA -40°C to +85°C 8 Plastic DIP MAX706ESA -40°C to +85°C 8 SO MAX706EUA -40°C to +85°C 8 μMAX MAX706MJA -55°C to +125°C 8 CERDIP** MAX707CPA 0°C to +70°C 8 Plastic DIP MAX707CSA 0°C to +70°C 8 SO MAX707CUA 0°C to +70°C 8 μMAX MAX707C/D 0°C to +70°C Dice* MAX707EPA -40°C to +85°C 8 Plastic DIP MAX707ESA -40°C to +85°C 8 SO MAX707EUA -40°C to +85°C 8 μMAX MAX707MJA -55°C to +125°C 8 CERDIP** MAX708CPA 0°C to +70°C 8 Plastic DIP MAX708CSA 0°C to +70°C 8 SO MAX708CUA 0°C to +70°C 8 μMAX MAX708C/D 0°C to +70°C Dice* MAX708EPA -40°C to +85°C 8 Plastic DIP MAX708ESA -40°C to +85°C 8 SO MAX708EUA -40°C to +85°C 8 μMAX MAX708MJA -55°C to +125°C 8 CERDIP** MAX813LCPA 0°C to +70°C 8 Plastic DIP MAX813LCSA 0°C to +70°C 8 SO MAX813LCUA 0°C to +70°C 8 μMAX MAX813LC/D 0°C to +70°C Dice* MAX813LEPA -40°C to +85°C 8 Plastic DIP MAX813LESA -40°C to +85°C 8 SO MAX813LEUA -40°C to +85°C 8 μMAX MAX813LMJA -55°C to +125°C 8 CERDIP** MAX705 MAX706 MAX813L 8 WDO 7 RESET (RESET) 6 WDI 5 PFO 8 RESET 7 RESET 6 N.C. 5 PFO DIP/SO GND 3 MAX707 MAX708 PFI 4 DIP/SO ( ) ARE FOR MAX813L ONLY. TOP VIEW (RESET) RESET 1 WDO 2 MR 3 VCC 4 MAX705 MAX706 MAX813L 8 WDI 7 PFO 6 PFI 5 GND 8 N.C. 7 PFO µMAX RESET 1 RESET 2 MR 3 VCC 4 MAX707 MAX708 6 PFI 5 GND µMAX ( ) ARE FOR MAX813L ONLY. *Dice are specified at TA = +25°C. **Contact factory for availability and processing to MIL-STD-883. Devices in PDIP, SO and μMAX packages are available in both leaded and lead-free packaging. Specify lead free by adding the + symbol at the end of the part number when ordering. Lead-free not available for CERDIP package. www.maximintegrated.com Maxim Integrated │  9 www.maximintegrated.com 140 140 140 140 140 140 140 140 140 140 140 4.65/adj. 4.65/4.40 2.63/2.93/3.08 4.65/4.40 2.63 2.63/2.93/3.08 4.65/4.40 2.63/2.93/3.08 4.65 4.60/4.40/ 2.63/2.93/3.08 2.63/2.93/3.07/3.08 Adj. 2.63/2.93/3.07/3.08 4.60/4.40 4.68/4.58/4.43 4.60/4.40/ 2.63/2.93/3.08 2.63/2.93/3.08 4.65/4.40/ 2.63/2.93/3.08 2.63/2.93/3.08 4.68/4.58/4.43 4.68/4.58/4.43 4.65/4.40/ 2.63/2.93/3.08 4.65/4.40/ 2.63/2.93/3.08 4.65 4.80/4.70/4.55/3.03 4.80/4.70/4.55/3.03 Adj./±1% 4.65/4.40/ 2.63/2.93/3.08 4.37/4.62 MAX700 MAX703/704 MAX704R/S/T MAX705/706 MAX706P MAX706R/S/T MAX707/708 MAX708R/S/T MAX791 MAX802L/M/R/S/T MAX793R/S/U/T MAX794 MAX795R/S/U/T MAX800L/M MAX801L/N/M MAX802L/M/R/S/T MAX804R/S/T MAX805L/M/R/S/T MAX806R/S/T MAX807L/N/M MAX808L/N/M MAX809L/M/R/S/T MAX810L/M/R/S/T MAX813L MAX814K/L/N/T MAX815K/L/N/T MAX816 MAX820L/M/R/S/T MXD1210 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 200 35/adj. ü ü/±1% ü/±1% ü ü ü ü/±1.5% ü/±1.5% ü ü/±1.5% ü ü ü ü ü ü ü ü ü ü ü ü/±1% ü ü ü/±1.5% ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü Adj. MAX697 35/adj. ü ü ü ü ü ü Adj. MAX696 ü ü ü ü The MAX1691 is a module with the MAX691A and a 125mAh lithium battery ü ü MAX1691 140/adj. ü ü ü ü 4.65/4.40 140 140 250 MAX691A/693A Part Number 2.63/2.93/3.08 Nominal Reset MAX690R/S/T Threshold (V) 4.65/4.40 Active-Low Reset 4.37/4.62 Active-High Reset MAX690A/692A RESET Valid to VCC = 1V MAX1232 Minimum Reset Pulse Width (ms) Ordering Information Nominal Watchdog Timeout Period (sec), if Available 1 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6/adj. 1.6 1.6 1 1 1.6 1.6 1.6 1.6/adj. 1.6/adj. 1.6/adj. 1.6 1.6 0.15/0.6/1.2 Separate Watchdog Output ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü Backup-Battery Switch ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü VCC-to-VOUT On Resistance Max (Ω) 2.5 TBD TBD 6 10 6 10 TBD 1.2 TBD TBD TBD 1.2 6 10 1.2 6 10 VBATT - to-VOUT On Resistance Max (Ω) 667 TBD TBD 400 400 400 400 TBD 25 TBD TBD TBD 25 400 400 25 400 400 CE Write Protect Maxim Integrated │  10 ü ü/10ns ü ü ü ü ü ü/10ns ü/10ns ü/10ns ü ü/10ns Power-Fail Comparator ü/±2% ü/±2% ü/±2% ü/±2% ü/±2% ü/±2% ü ü ü/±2% ü/±2% ü/±2% ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü Manual-Reset Input ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü Low-Line Output ü ü ü ü ü Battery-On Output ü ü ü ü ü ISUPPLY Operating Mode mA max (typ) 0.5 (0.23) 0.15 (0.07) TBD TBD TBD 0.35(0.2) 0.06 (0.024) 0.06 (0.024) TBD TBD 0.5(0.4) 0.35(0.2) 0.5(0.4) 0.35(0.2) TBD 0.1(0.035) TBD TBD TBD 0.15(0.07) 0.15(0.06) 0.35(0.2) 0.35(0.2) 0.35(0.2) 0.35(0.2) 0.35(0.2) 0.5(0.4) 0.35(0.2) 0.2(0.1) 0.1(0.035) 0.5(0.4) 0.35(0.2) 0.2(0.05) ISUPPLY Backup Mode µA max (typ) 0.1(0.002) TBD TBD TBD TBD TBD 1(0.4) 5(0.05) 1(0.4) 5(0.05) TBD 5(0.04) TBD TBD TBD 5(0.04) 1(0.4) 5(0.05) 5(0.04) 1(0.4) 5(0.05) Pins 8 16 8 8 8 8 3 3 16 8 8 8 8 8 8 8 16 8 16 16 16 8 8 8 8 8 8 8 8 16 16 16 16 8 8 8 Price† 1000-up ($) 2.44 3.82 †† †† †† 1.02* †† †† †† †† 3.90 3.26 3.66 3.59 †† 3.88 †† †† †† 3.42 3.90 1.63 0.88* 1.71 1.71 1.02* 2.93 1.38* 2.17 3.58 3.55 †† 3.61 3.23 3.26 1.71 MAX705–MAX708/MAX813L MAX705–MAX708/MAX813L Low-Cost, μP Supervisory Circuits MAX705–MAX708/MAX813L MAX705–MAX708/MAX813L Low-Cost, μP Supervisory Circuits Package Information For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO. 8 μMAX U8+1 21-0036 8 Plastic DIP P8+1 21-0043 8 SO S8+2 21-0041 Chip Topography VCC MR WDO/RESET RESET (RESET) WDI/N.C. 0.051" (1.30mm) GND PFI PFO 0.074" (1.88mm) ( ) ARE FOR MAX813L ONLY. TRANSISTOR COUNT: 572 SUBSTRATE MUST BE LEFT UNCONNECTED. www.maximintegrated.com Maxim Integrated │  11 MAX705–MAX708/MAX813L Low-Cost, μP Supervisory Circuits Revision History REVISION NUMBER REVISION DATE PAGES CHANGED 0 2/92 Initial release 8 3/10 Updated the Features, Absolute Maximum Ratings, Typical Operating Characteristics, Figures 3, 7, 8, and the Package Information sections 9 1/13 Updated package code for 8 SO package 11 10 4/15 Deleted “Automotive Systems” from Applications and updated Benefits and Features sections 1 11 7/18 Updated Pin Description table 5 DESCRIPTION — 1, 2, 4, 7, 8, 10 For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. © 2018 Maxim Integrated Products, Inc. │  12