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19-4334; Rev. 8; 3/10
Low-Cost, P Supervisory Circuits
_______________General Description
The MAX705-MAX708/MAX813L microprocessor (P) supervisory circuits reduce the complexity and number of components required to monitor power-supply and battery functions in P 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, low-battery 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 MAX(R) packages.
___________________________Features
o Available in Tiny MAX Package o Guaranteed RESET Valid at VCC = 1V o Precision Supply-Voltage Monitor 4.65V in MAX705/MAX707/MAX813L 4.40V in MAX706/MAX708 o 200ms Reset Pulse Width o Debounced TTL/CMOS-Compatible Manual-Reset Input o Independent Watchdog Timer--1.6s Timeout (MAX705/MAX706) o Active-High Reset Output (MAX707/MAX708/MAX813L) o Voltage Monitor for Power-Fail or Low-Battery Warning
MAX705-MAX708/MAX813L
______________Ordering Information
PART MAX705CPA MAX705CSA MAX705CUA MAX705C/D TEMP RANGE 0C to +70C 0C to +70C 0C to +70C 0C to +70C PIN-PACKAGE 8 Plastic DIP 8 SO 8 MAX Dice*
_______________________Applications
Computers Controllers Intelligent Instruments Automotive Systems Critical P Power Monitoring
MAX is a registered trademark of Maxim Integrated Products, Inc.
Ordering Information continued at end of data sheet. * Dice are specified at TA = +25C. **Contact factory for availability and processing to MIL-STD-883. Devices in PDIP, SO and MAX 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.
_________________Pin Configurations
TOP VIEW
MR VCC 1 2 8 7 WDO RESET (RESET) WDI PFO
__________Typical Operating Circuit
UNREGULATED DC MAX667 +5V DC LINEAR REGULATOR P VCC PFI MR RESET PFI MAX705 WDO MAX706 PFO VCC RESET I/O LINE NMI INTERRUPT
GND 3 PFI 4
MAX705 MAX706 MAX813L DIP/SO
6 5
MR VCC
1 2
8 7
RESET RESET N.C. PFO
GND 3 PFI 4
MAX707 MAX708
6 5
PUSHBUTTON SWITCH
MAX813L
DIP/SO
( ) ARE FOR MAX813L ONLY. Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
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.
Low-Cost, P Supervisory Circuits MAX705-MAX708/MAX813L
ABSOLUTE MAXIMUM RATINGS
CERDIP (derate 8.00mW/C above +70C) . . . . . . . . . . 640mW Terminal Voltage (with respect to GND) Operating Temperature Ranges VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6.0V MAX70_C__, MAX813LC__ . . . . . . . . . . . . . . . . . . . . 0C to +70C All Other Inputs (Note 1) . . . . . . . . . . . . . . . -0.3V to (VCC + 0.3V) MAX70_E__, MAX813LE__ . . . . . . . . . . . . . . . . . . . -40C to +85C Input Current MAX70_MJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55C to +125C VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20mA Storage Temperature Range . . . . . . . . . . . . . . . . -65C to +160C GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20mA Lead Temperature (soldering, 10s) . . . . . . . . . . . . . . . . . . . +300C Output Current (all outputs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20mA Soldering Temperature (reflow) Continuous Power Dissipation (TA = +70C) Lead(Pb)-free.................................................................+260C Plastic DIP (derate 9.09mW/C above +70C) . . . . . . . 727mW Containing Lead(Pb)......................................................+240C SO (derate 5.88mW/C above +70C) . . . . . . . . . . . . . . . 471mW MAX (derate 4.10mW/C above +70C) . . . . . . . . . . . . 330mW 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 SYMBOL VCC CONDITIONS MAX70_C MAX813LC MAX70_E/M, MAX813LE/M MAX705C, MAX706C, MAX813LC MAX705E/M, MAX706E/M, MAX813LE/M MAX707C, MAX708C MAX707E/M, MAX708E/M MAX705, MAX707, MAX813L MAX706, MAX708 MIN 1.0 1.1 1.2 150 150 50 50 4.65 4.40 40 200 TYP MAX 5.5 5.5 5.5 350 500 350 500 4.75 4.50 280 0.4 0.3 0.3 0.4 V UNITS V
Supply Current
ISUPPLY
A
Reset Threshold (Note 2) Reset Threshold Hysteresis (Note 2) Reset Pulse Width (Note 2)
VRT
4.50 4.25 140 VCC - 1.5
V mV ms
tRS
RESET Output Voltage
RESET Output Voltage
Watchdog Timeout Period WDI Pulse Width Low WDI Input Threshold High WDI Input Current
tWD tWP
ISOURCE = 800A ISINK = 3.2mA MAX70_C, VCC = 1V, ISINK = 50A MAX70_E/M, VCC = 1.2V, ISINK = 100A MAX707, MAX708, ISOURCE = 800A VCC - 1.5 MAX707, MAX708, ISINK = 1.2mA MAX813LC, ISOURCE = 4A, VCC = 1.1V 0.8 MAX813LE/M, ISOURCE = 4A, VCC = 1.2V 0.9 ISOURCE = 800A VCC - 1.5 MAX813L ISINK = 3.2mA MAX705, MAX706, MAX813L 1.00 1.60 VIL = 0.4V, VIH = (VCC) (0.8) 50 MAX705, MAX706, MAX813L, VCC = 5V MAX705, MAX706, MAX813L, WDI = VCC MAX705, MAX706, MAX813L, WDI = 0V MAX705, MAX706, MAX813L, ISOURCE = 800A MAX705, MAX706, MAX813L, ISINK = 1.2mA 3.5 -150 VCC - 1.5 50 -50
V
0.4 2.25 0.8 150
s ns V A
WDO Output Voltage
V 0.4
2
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Low-Cost, P 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 MR Pull-Up Current MR Pulse Width MR Input Threshold Low High tMD VCC = 5V ISOURCE = 800A ISINK = 3.2mA 1.20 -25.00 VCC - 1.5 0.4 1.25 +0.01 tMR SYMBOL MR = 0V CONDITIONS MIN 100 150 0.8 2.0 250 1.30 +25.00 TYP 250 MAX 600 UNITS A ns V ns V nA V
MAX705-MAX708/MAX813L
MR to Reset Out Delay (Note 2) PFI Input Threshold PFI Input Current PFO Output Voltage
Note 2: Applies to both RESET in the MAX705-MAX708 and RESET in the MAX707/MAX708/MAX813L.
_______________________________________________________________________________________
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Low-Cost, P Supervisory Circuits MAX705-MAX708/MAX813L
__________________________________________Typical Operating Characteristics
MAX705/MAX707 RESET OUTPUT VOLTAGE vs. SUPPLY VOLTAGE
+5V TA = +25C 1V/div VCC +5V VCC
MAX705/MAX707 RESET RESPONSE TIME
POWER-FAIL COMPARATOR DE-ASSERTION RESPONSE TIME
PFI +4V +5V PFO VCC = +5V TA = +25C 1k +3V
TA = +25C +5V 0V VCC RESET VCC RESET GND 0V 500ms/div 2s/div 2k 1V/div RESET 330pF RESET +5V VCC VCC RESET GND 10k RESET 30pF 0V 1V/div
PFO
30pF +1.25V
0V +1.30V PFI +1.20V 400ns/div
POWER-FAIL COMPARATOR ASSERTION RESPONSE TIME
+5V +5V PFO PFI PFO 30pF +1.25V +1.30V PFI VCC = +5V TA = +25C 0V 50mV/div +5V 1k +5V 1V/div +1.20V 400ns/div TA = +25C
MAX707 RESET, RESET ASSERTION
VCC = VRT TA = +25C +5V
MAX707 RESET, RESET DE-ASSERTION
VCC = VRT TA = +25C
RESET 0V VCC RESET RESET GND 0V +5V 330pF RESET 0V 400ns/div 1V/div 10k 10k 330pF
VCC RESET RESET GND
10k 10k 330pF
RESET 2V/div
330pF
RESET
0V
400ns/div
MAX707/MAX708/MAX813L RESET OUTPUT VOLTAGE vs. SUPPLY VOLTAGE
+5V +5V 1V/div VCC VCC
MAX813L RESET RESPONSE TIME
+4V VCC RESET
0V
VCC RESET GND
+5V 330pF 10k 1V/div
0V
GND
330pF 10k +4V
RESET
0V 500ms/div
0V 2s/div
4
_______________________________________________________________________________________
Low-Cost, P Supervisory Circuits
______________________________________________________________Pin Description
PIN MAX705/MAX706 DIP/SO MAX MAX707/MAX708 DIP/SO MAX MAX813L DIP/SO MAX Manual-Reset Input triggers a reset pulse when pulled below 0.8V. This active-low input has an internal 250A pull-up current. It can be driven from a TTL or CMOS logic line as well as shorted to ground with a switch. +5V Supply Input 0V Ground Reference for all signals Power-Fail Voltage Monitor Input. When PFI is less than 1.25V, PFO goes low. Connect PFI to GND or VCC when not used. Power-Fail Output goes low and sinks current when PFI is less than 1.25V; otherwise PFO stays high. 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 threestated, or WDI sees a rising or falling edge. No Connect 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. 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. 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. NAME FUNCTION
MAX705-MAX708/MAX813L
1
3
1
3
1
3
MR
2 3
4 5
2 3
4 5
2 3
4 5
VCC GND
4
6
4
6
4
6
PFI
5
7
5
7
5
7
PFO
6
8
--
--
6
8
WDI
--
--
6
--
--
--
N.C.
7
1
7
1
--
--
RESET
8
2
--
--
8
2
WDO
--
--
8
2
7
1
RESET
_______________________________________________________________________________________
5
Low-Cost, P Supervisory Circuits MAX705-MAX708/MAX813L
WDI
6
WATCHDOG TRANSITION DETECTOR VCC 250A
WATCHDOG TIMER TIMEBASE FOR RESET AND WATCHDOG RESET GENERATOR
8
WDO
VCC 250A MR 1 RESET GENERATOR
8
RESET
MR
1 2
7
7
VCC
RESET (RESET)
VCC
2
RESET
4.65V* 4.65V* PFI 4
MAX705 MAX706 MAX813L
PFI 5 PFO
4
MAX707 MAX708
5 PFO
1.25V 1.25V * 4.40V FOR MAX7O6. ( ) ARE FOR MAX813L ONLY. 3 GND * 4.40V FOR MAX7O6. 3 GND
Figure 1. MAX705/MAX706/MAX813L Block Diagram
Figure 2. MAX707/MAX708 Block Diagram
_______________Detailed Description
Reset Output
A microprocessor's (P's) reset input starts the P in a known state. Whenever the P 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 Ps, such as Intel's 80C51, require an active-high reset pulse.
WDI input is three-stated, the watchdog timer will stay cleared and will not count. As soon as reset is released and WDI is driven high or low, the timer will start counting. Pulses as short as 50ns can be detected. Typically, WDO will be connected to the non-maskable interrupt input (NMI) of a P. When VCC drops below the reset threshold, WDO will go 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.
Watchdog Timer
The MAX705/MAX706/MAX813L watchdog circuit monitors the P's activity. If the P does not toggle the watchdog input (WDI) within 1.6sec and WDI is not three-stated, WDO goes low. As long as RESET is asserted or the
6
_______________________________________________________________________________________
Low-Cost, P 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.
tWP WDI +5V 0V +5V WDO 0V +5V RESET 0V RESET EXTERNALLY TRIGGERED BY MR tRS
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 P so it can prepare for an orderly power-down.
MAX705-MAX708/MAX813L
__________Applications Information
tWD tWD tWD
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 pull-down 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 100k, large enough not to load RESET and small enough to pull RESET to ground.
+5V (RESET) 0V
Monitoring Voltages Other Than the Unregulated DC Input
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 will reduce 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.
( ) ARE FOR MAX813L ONLY.
Figure 3. MAX705/MAX706/MAX813L Watchdog Timing
VRT VCC
VRT tRS tRS
+5V RESET 0V +5V MR 0V tMD tMR
Monitoring a Negative Voltage
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 reset. As long as PFO remains high, the MAX705MAX708/MAX813L will 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.
+5V WDO 0V
MR EXTERNALLY DRIVEN LOW
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.
_______________________________________________________________________________________
7
Low-Cost, P Supervisory Circuits MAX705-MAX708/MAX813L
+12V
+5V
1M 1%
VCC
RESET
TO P
MAX70_ MAX70_
RESET R1 130k 1% PFI GND MR PFO
PARAMETER +12V Reset Threshold at +25C
MIN 10.67
TYP 10.87
MAX 11.50
UNIT V
Figure 5. RESET Valid to Ground Circuit
Figure 6. Monitoring Both +5V and +12V
+5V VCC R1 MR 100k
BUFFERED RESET TO OTHER SYSTEM COMPONENTS
MAX70_
PFI PFO
100k 2N3904
VCC
VCC
MAX70_
R2 GND RESET TO P RESET
4.7k RESET
P
V+5V MR 0V +5V PFO 0V V5 - 1.25 R1 VTRIP 0V
GND
GND
Figure 8. Interfacing to Ps with Bidirectional Reset I/O
=
1.25 - VTRIP R2
, VTRIP < 0
Interfacing to Ps with Bidirectional Reset Pins
Ps 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 P wants to pull it low, indeterminate logic levels may result. To correct this, connect a 4.7k resistor between the RESET output and the P reset I/O, as in Figure 8. Buffer the RESET output to other system components.
Figure 7. Monitoring a Negative Voltage
8
_______________________________________________________________________________________
Low-Cost, P Supervisory Circuits
__Ordering Information (continued)
PART MAX705EPA MAX705ESA MAX705EUA MAX705MJA MAX706CPA MAX706CSA MAX706CUA MAX706C/D MAX706EPA MAX706ESA MAX706EUA MAX706MJA MAX707CPA MAX707CSA MAX707CUA MAX707C/D MAX707EPA MAX707ESA MAX707EUA MAX707MJA MAX708CPA MAX708CSA MAX708CUA MAX708C/D MAX708EPA MAX708ESA MAX708EUA MAX708MJA MAX813LCPA MAX813LCSA MAX813LCUA MAX813LC/D MAX813LEPA MAX813LESA MAX813LEUA MAX813LMJA TEMP RANGE -40C to +85C -40C to +85C -40C to +85C -55C to +125C 0C to +70C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C -55C to +125C 0C to +70C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C -55C to +125C 0C to +70C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C -55C to +125C 0C to +70C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C -55C to +125C PIN-PACKAGE 8 Plastic DIP 8 SO 8 MAX 8 CERDIP** 8 Plastic DIP 8 SO 8 MAX Dice* 8 Plastic DIP 8 SO 8 MAX 8 CERDIP** 8 Plastic DIP 8 SO 8 MAX Dice* 8 Plastic DIP 8 SO 8 MAX 8 CERDIP** 8 Plastic DIP 8 SO 8 MAX Dice* 8 Plastic DIP 8 SO 8 MAX 8 CERDIP** 8 Plastic DIP 8 SO 8 MAX Dice* 8 Plastic DIP 8 SO 8 MAX 8 CERDIP** ( ) ARE FOR MAX813L ONLY. TRANSISTOR COUNT: 572 SUBSTRATE MUST BE LEFT UNCONNECTED.
PFI PFO GND RESET (RESET) WDI/N.C. 0.051" (1.30mm) V CC MR WDO/RESET
( ) ARE FOR MAX813L ONLY. RESET RESET MR V CC 1 2 3 4 8 7 N.C. PFO PFI GND
_____Pin Configurations (continued)
TOP VIEW
(RESET) RESET WDO MR V CC 1 2 3 4 8 7 WDI PFO PFI GND
MAX705-MAX708/MAX813L
MAX705 MAX706 MAX813L MAX
6 5
MAX707 MAX708
6 5
MAX
____________________Chip Topography
0.074" (1.88mm)
* Dice are specified at TA = +25C. **Contact factory for availability and processing to MIL-STD-883. Devices in PDIP, SO and MAX 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.
_______________________________________________________________________________________
9
MAX705-MAX708/MAX813L
Manual-Reset Input
Nominal Reset Threshold (V)
Minimum Reset Pulse Width (ms)
Active-Low Reset
VCC-to-VOUT On Resistance Max ()
VBATT-to-VOUT On Resistance Max () -- -- CE Write Protect
Battery-On Output
Part Number
Power-Fail Comparator
Active-High Reset
----- ----- RESET Valid to VCC = 1V
Nominal Watchdog Timeout Period (sec), if Available
Separate Watchdog Output Backup-Battery Switch
Low-Line Output
0.2(0.05) 0.35(0.2) 0.5(0.4) 0.1(0.035) 5(0.05) 1(0.4) 5(0.04)
10 6 1.2 /10ns 400 400 25 10 6 400 400 5(0.05) 1(0.4)

MAX1232 MAX690A/692A MAX690R/S/T MAX691A/693A MAX1691 MAX696 MAX697 MAX700 MAX703/704 MAX704R/S/T MAX705/706 MAX706P MAX706R/S/T MAX707/708 MAX708R/S/T MAX791 MAX792L/M/R/S/T 1.2 /10ns /2% /2% /2% /2% 25 /10ns /10ns 5(0.04) TBD TBD TBD 0.1(0.035) TBD 0.35(0.2) 0.5(0.4) 0.35(0.2) 0.5(0.4) TBD TBD 0.06(0.024) 0.06(0.024) TBD TBD TBD 5(0.04) TBD 5(0.05) 1(0.4) 5(0.05) 1(0.4) TBD TBD 0.2(0.1) 0.35(0.2) 0.5(0.4) 0.35(0.2) 0.35(0.2) 0.35(0.2) 0.35(0.2) 0.35(0.2) 0.15(0.06) 0.15(0.07) TBD TBD TBD 1.2 TBD 10 6 10 6 TBD TBD 400 TBD TBD 400 400 TBD TBD TBD 25 TBD 400 16 16 8 16 8 8 8 8 8 8 16 3 3 3.88 3.59 3.66 3.26 3.90
ISUPPLY Operating Mode mA max (typ)
ISUPPLY Backup Mode A max (typ)
Pins
8 8 8 16 16 16 16 8 8 8 8 8 8 8 8 16 16
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
Low-Cost, P Supervisory Circuits
MAX810L/M/R/S/T
MAX813L MAX814K/L/N/T MAX815K/L/N/T MAX816 MAX820L/M/R/S/T 2.5 667
/10ns
/2% /2% /2% /2% /2%

0.35(0.2) TBD TBD TBD 0.15(0.07) 0.5(0.23)
TBD TBD TBD
8 8 8 8 16 0.1(0.002) 8
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Price 1000-up ($)
1.71 3.26 3.23 3.61 3.55 3.58 2.17 1.38* 2.93 1.02* 1.71 1.71 0.88* 1.63 3.90 3.42 1.02* 3.82 2.44
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___________________________________________P Supervisory Circuits
MXD1210
4.37/4.62 250 0.15/0.6/1.2 4.65/4.40 140 1.6 2.63/2.93/3.08 140 1.6 4.65/4.40 140/adj. 1.6/adj. The MAX1691 is a module with the MAX691A and a 125mAh lithium battery Adj. 35/adj. 1.6/adj. Adj. 35/adj. 1.6/adj. 4.65/adj. 200 4.65/4.40 140 2.63/2.93/3.08 140 4.65/4.40 140 1.6 2.63 140 1.6 2.63/2.93/3.08 140 1.6 4.65/4.40 140 2.63/2.93/3.08 140 4.65 140 1 4.65/4.40/ 140 1 2.63/2.93/3.08 2.63/2.93/3.07/3.08 140 1.6 Adj. 140 1.6 2.63/2.93/3.07/3.08 140 4.60/4.40 140 1.6/adj. 4.68/4.58/4.43 140 /1.5% 1.6 4.60/4.40/ 140 1.6 2.63/2.93/3.08 2.63/2.93/3.08 140 1.6 4.65/4.40/ 140 1.6 2.63/2.93/3.08 2.63/2.93/3.08 140 4.68/4.58/4.43 140 /1.5% /1.5% 1.6 4.68/4.58/4.43 140 /1.5% 4.65/4.40/ 140 2.63/2.93/3.08 4.65/4.40/ 140 2.63/2.93/3.08 4.65 140 1.6 4.80/4.70/4.55/3.03 140 /1% /1% 4.80/4.70/4.55/3.03 140 /1% 1.6 Adj./1% 140 4.65/4.40/ 140 1 2.63/2.93/3.08 4.37/4.62

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Prices provided are for design guidance and are FOB USA (unless otherwise noted). International prices will differ due to local duties, taxes, and exchange rates. Future product--contact factory for pricing and availability. Specifications are preliminary. 25,000 pc. price, factory direct
Low-Cost, P Supervisory Circuits
Package Information
For the latest package outline information and land patterns, go to www.maxim-ic.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 8 MAX 8 Plastic DIP 8 SO PACKAGE CODE U8-1 P8-1 S8-1 DOCUMENT NO. 21-0036 21-0043 21-0041
MAX705-MAX708/MAX813L
______________________________________________________________________________________
11
Low-Cost, P Supervisory Circuits MAX705-MAX708/MAX813L
Revision History
REVISION NUMBER 0 8 REVISION DATE 2/92 3/10 Initial release Updated the Features, Absolute Maximum Ratings, Typical Operating Characteristics, Figures 3, 7, 8, and the Package Information sections. DESCRIPTION PAGES CHANGED -- 1, 2, 4, 7, 8, 10
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2010 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.

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