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19-1952; Rev 0; 1/01.
Low-Voltage, SOT23 P Supervisors with Power Fail In/Out, Manual Reset, and Watchdog Timer
General Description
The MAX6701-MAX6708 microprocessor (P) supervisory circuits reduce the complexity and components required to monitor power-supply functions in P systems. These devices significantly improve system reliability and accuracy compared to separate ICs or discrete components. The MAX6701-MAX6708 family provides four functions: a reset output during power-up, power-down and brownout conditions; an independent watchdog output that goes low if the watchdog input has not been toggled within 1.6s; a 0.62V threshold detector for power-fail warning; and an active-low manual reset input. The MAX6701-MAX6708 family offers several pinout options to accommodate a variety of multivoltage microprocessor supervision applications. The MAX6701/MAX6702/MAX6703 monitor three supply voltages (one fixed threshold and two adjustable) to drive a single reset output and include a manual reset input and a watchdog timer with an independent output. The MAX6704 monitors a single supply voltage to drive complementary reset outputs and includes an independent adjustable power fail in/power fail out comparator, a manual reset input, and a reset based watchdog timer. The MAX6705/MAX6706/MAX6707 monitor a single supply voltage to drive a single reset output and include an independent adjustable power fail in/power fail out comparator, a manual reset input, and a watchdog timer with an independent output. The MAX6708 is the same as the MAX6704 but without the watchdog timer function.
Features
o Small 8-Pin SOT23 Package o Precision Monitoring of +5.0V, +3.3V, +3.0V, +2.5V Supply Voltages o 140ms Reset Timeout Delay o Power Fail Input with Independent Output; Monitors Inputs Down to 0.62V (MAX6704- MAX6708) o Dual Adjustable Reset Input for Triple Voltage Monitoring (MAX6701/MAX6702/MAX6703) o 1.6s Watchdog Timeout Period (MAX6701-MAX6707) o Independent Watchdog Output (MAX6701/MAX6702/MAX6703/MAX6705/ MAX6706/MAX6707) o Manual Reset Input o Four Reset Output Stage Options Active-Low Push-Pull (MAX6701, MAX6705) Active-Low Open-Drain (MAX6703, MAX6707) Active-High Push-Pull (MAX6702, MAX6706) Dual Active-Low/High Push-Pull (MAX6704, MAX6708) o Guaranteed Reset Valid to VCC = 1V o Immune to Short Negative VCC Transients o Low Cost, Few External Components
MAX6701-MAX6708
Ordering Information
PART MAX6701_KA-T MAX6702_ KA-T MAX6703_ KA-T TEMP. RANGE -40C to +125C -40C to +125C -40C to +125C PIN-PACKAGE SOT23-8 SOT23-8 SOT23-8
Applications
Computers Controllers Intelligent Instruments Automotive Systems Critical P Power Monitoring White Goods Networking Telecommunications
Insert the desired suffix letter (from the Threshold Suffix Guide table) into the blank to complete the part number. All devices must be ordered in increments of 2500 pieces. Sample stock is typically held on standard versions only. Contact factory for availability. Ordering Information continued at end of data sheet.
Pin Configurations
TOP VIEW
MR VCC 1 2 3 8 7 WDO RESET (RESET) WDI RST_IN2 G
Typical Operating Circuit appears at end of data sheet.
GND
MAX6701 MAX6702 MAX6703
6 5
RST_IN1 4
SOT23-8
( ) ARE FOR MAX6702 ONLY
Pin Configurations continued at end of data sheet. ________________________________________________________________ Maxim Integrated Products 1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
Low-Voltage, SOT23 P Supervisors with Power Fail In/Out, Manual Reset, and Watchdog Timer MAX6701-MAX6708
ABSOLUTE MAXIMUM RATINGS
VCC ........................................................................-0.3V to +6.0V Open-Drain RESET, WDO, PFO ...........................-0.3V to +6.0V Push-Pull RESET, RESET, WDO, PFO ........-0.3V to (VCC + 0.3V) MR, WDI, PFI, RST_IN1, RST_IN2 ..............-0.3V to (VCC + 0.3V) Input Current (VCC) .............................................................20mA Output Current (RESET, RESET, PFO, WDO) .....................20mA Continuous Power Dissipation (TA = +70C) 8-Pin SOT23 (derate 8.9mW/C above +70C)............714mW Operating Temperature Range .........................-40C to +125C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C
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 = +4.25V to +5.5V for L/M versions, VCC = +2.55V to +3.6V for the T/S/R versions, VCC = +2.1V to +2.75V for the Z/Y versions. TA = -40C to +125C, unless otherwise specified. Typical values are at TA = +25C.) (Note 1)
PARAMETER Operating Voltage Range Supply Current MR Unconnected SYMBOL VCC CONDITIONS TA = 0C to +125C TA = -40C to +125C VCC < 5.5V, no load ICC VCC < 3.6V, no load VCC < 3.6V, no load (MAX6708 only) MAX670_L MAX670_M MAX670_T VCC Reset Threshold (VCC falling) VTH MAX670_S MAX670_R MAX670_Z MAX670_Y Reset Threshold Temperature Coefficient VCC to Reset Output Delay Reset Timeout Period PFI, RST_IN1, RST_IN2 Threshold PFI, RST_IN1, RST_IN2 Hysteresis tRP VCC = 1.8V to 5.5V VTH VCC falling at 10mV/s TA = -40C to +85C TA = -40C to +125C TA = -40C to +85C TA = -40C to +125C 140 120 602 593 6 618 TA = -40C to +85C TA = -40C to +125C TA = -40C to +85C TA = -40C to +125C TA = -40C to +85C TA = -40C to +125C TA = -40C to +85C TA = -40C to +125C TA = -40C to +85C TA = -40C to +125C TA = -40C to +85C TA = -40C to +125C TA = -40C to +85C TA = -40C to +125C 4.50 4.47 4.25 4.22 3.00 2.97 2.85 2.83 2.55 2.53 2.25 2.24 2.12 2.11 60 12 200 280 300 634 642 2.19 2.32 2.63 2.93 3.08 4.38 MIN 1.0 1.2 12 9 6 4.63 TYP MAX 5.5 5.5 25 20 20 4.75 4.78 4.50 4.53 3.15 3.17 3.00 3.02 2.70 2.72 2.38 2.40 2.25 2.27 ppm/C s ms mV mV V A UNITS V
2
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Low-Voltage, SOT23 P Supervisors with Power Fail In/Out, Manual Reset, and Watchdog Timer
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +4.25V to +5.5V for L/M versions, VCC = +2.55V to +3.6V for the T/S/R versions, VCC = +2.1V to +2.75V for the Z/Y versions. TA = -40C to +125C, unless otherwise specified. Typical values are at TA = +25C.) (Note 1)
PARAMETER PFI, RST_IN1, RST_IN2 Leakage Current PFI to PFO Delay MR Input Voltage MR Minimum Input Pulse MR Glitch Rejection MR to Reset Delay MR Pullup Resistance Watchdog Timeout Period WDI Pulse Width WDI Input Voltage WDI Input Current tMD TA = -40C to +85C TA = -40C to +125C (Note 2) 25 1.12 0.96 50 0.3 x VCC 0.7 x VCC WDI = 0 or VCC VCC 1.0V, ISINK = 50A, output asserted (TA = 0C to +125C) VOL VCC 1.2V, ISINK = 100A, output asserted VCC 2.55V, ISINK = 1.2mA, output asserted VCC 4.25V, ISINK = 3.2mA, output asserted PFO Output Low (Push-Pull or Open-Drain) VCC 1.80V, ISINK = 200A, output asserted VOL VCC 2.55V, ISINK = 1.2mA, output asserted VCC 4.25V, ISINK = 3.2mA, output asserted VCC 2.7V, ISINK = 500A, output not asserted VOH VCC 4.75V, ISINK = 800A, output not asserted VCC > VTH, output not asserted VCC 1.0V, ISOURCE = 1A, reset asserted (TA = 0C to +125C) RESET Output High (Push-Pull Only) VCC 1.2V, ISOURCE = 50A, reset asserted VOH VCC 2.55V, ISOURCE = 500A, reset asserted VCC 4.25V, ISOURCE = 800A, reset asserted 0.8 x VCC 0.8 x VCC V 0.8 x VCC 0.8 x VCC 0.8 x VCC V 0.8 x VCC 1.0 A -1 +1 0.3 0.3 0.3 0.4 0.3 0.3 0.4 V V tPF VIL VIH 0.7 x VCC 1 100 200 50 1.6 SYMBOL (Note 2) CONDITIONS TA = -40C to +85C TA = -40C to +125C MIN -50 -200 1 0.3 x VCC TYP MAX +50 +200 UNITS nA s V s ns ns k s ns V A
MAX6701-MAX6708
tWD tWDI VIL VIH IWDI
75 2.4 2.52
RESET, WDO Output Low (Push-Pull or Open-Drain)
RESET, WDO, PFO Output High (Push-Pull Only) RESET, WDO, PFO Output Open-Drain Leakage Current
ILKG
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Low-Voltage, SOT23 P Supervisors with Power Fail In/Out, Manual Reset, and Watchdog Timer MAX6701-MAX6708
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +4.25V to +5.5V for L/M versions, VCC = +2.55V to +3.6V for the T/S/R versions, VCC = +2.1V to +2.75V for the Z/Y versions. TA = -40C to +125C, unless otherwise specified. Typical values are at TA = +25C.) (Note 1)
PARAMETER RESET Output Low (Push-Pull Only) SYMBOL CONDITIONS VCC 2.7V, ISINK = 1.2mA, reset not asserted VOL VCC 4.75V, ISINK = 3.2mA, reset not asserted MIN TYP MAX 0.3 V 0.4 UNITS
Note 1: Over temperature limits are guaranteed by design and not production tested. Devices are tested at TA = +25C. Note 2: Guaranteed by design. Not production tested.
Typical Operating Characteristics
(TA = +25C, unless otherwise noted.)
SUPPLY CURRENT vs. TEMPERATURE
MAX6701 toc01
RESET TIMEOUT PERIOD vs. TEMPERATURE
MAX6701 toc02
VCC TO RESET OUTPUT DELAY vs. TEMPERATURE
MAX6701 toc03
20
210
20 VCC TO RESET OUTPUT DELAY (s)
16 SUPPLY CURRENT (A) VCC = 5V MAX6705
RESET TIMEOUT PERIOD (ms)
205
15
12
200
10
8 VCC = 3.3V MAX6708
4
195
5
0 -40 -15 10 35 60 85 TEMPERATURE (C)
190 -40 -15 10 35 60 85 TEMPERATURE (C)
0 -40 -15 10 35 60 85 TEMPERATURE (C)
WATCHDOG TIMEOUT PERIOD vs. TEMPERATURE
MAX6701 toc04
NORMALIZED RESET THRESHOLD vs. TEMPERATURE
MAX6701 toc05
MAXIMUM VCC TRANSIENT DURATION vs. RESET THRESHOLD OVERDRIVE
MAXIMUM TRANSIENT DURATION (ms) MAX670_Y 50 40 30 20 10 0 RESET OCCURS ABOVE LINE
MAX6701 toc06
1.70 WATCHDOG TIMEOUT PERIOD (s)
1.05 1.04 NORMALIZED RESET THRESOLD 1.03 1.02 1.01 1.00 0.99 0.98 0.97 0.96
60
1.65
1.60
1.55
1.50 -40 -15 10 35 60 85 TEMPERATURE (C)
0.95 -40 -15 10 35 60 85 TEMPERATURE (C)
0
40
80
120
160
RESET THRESHOLD OVERDRIVE (mV)
4
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Low-Voltage, SOT23 P Supervisors with Power Fail In/Out, Manual Reset, and Watchdog Timer MAX6701-MAX6708
Typical Operating Characteristics (continued)
(TA = +25C, unless otherwise noted.)
OUTPUT VOLTAGE LOW vs. SINK CURRENT
MAX6701 toc07
VCC - VOH vs. SOURCE CURRENT
VCC 4.25V
300 250 VCC - VOH (mV) 200 150 100 50
MAX6701 toc08
100
350
VCC 4.25V
75 VOL (mV)
50
25
0 0 400 800 1200 1600 2000 2400 2800 3200 SINK CURRENT (A)
0 0 400 800 1200 1600 2000 2400 2800 3200 SOURCE CURRENT (A)
Pin Description
MAX6701 MAX6702 MAX6703 MAX6704 MAX6705 MAX6706 MAX6707 MAX6708 NAME FUNCTION Active-Low, Manual Reset Input, Internal 50k Pullup to VCC. Pull low to force a reset. Reset remains active as long as MR is low and for the reset timeout period after MR goes high. Leave unconnected or connect to VCC if unused. Supply Voltage for MAX6701-MAX6708 and Input for Primary Reset Threshold Monitor. Push-pull outputs are powered by VCC. Ground Power Fail Voltage Monitor Input. High-impedance input for internal power fail comparator. Connect this pin to an external resistive divider network to set the reset threshold voltage; 0.62V (typ) threshold. Connect to GND or VCC when not used. Power Fail Monitor Output. Open-drain or push-pull active-low. PFO goes low when PFI is less than 0.62V. Watchdog Input. If WDI remains high or low for longer than the watchdog timeout period, the internal watchdog timer runs out and WDO is asserted on the MAX6704 (resets are asserted for the reset timeout period). The internal watchdog timer clears whenever reset is asserted, or WDI sees a rising or falling edge. The watchdog function cannot be disabled. No Connection
1
1
1
1
MR
2 3
2 3
2 3
2 3
VCC GND
--
4
4
4
PFI
--
5
5
5
PFO
6
6
6
--
WDI
--
--
--
6
N.C.
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5
Low-Voltage, SOT23 P Supervisors with Power Fail In/Out, Manual Reset, and Watchdog Timer MAX6701-MAX6708
Pin Description (continued)
MAX6701 MAX6702 MAX6703 MAX6704 MAX6705 MAX6706 MAX6707 MAX6708 NAME FUNCTION
7
7
7
7
RESET
Active-Low Reset Output (Open-Drain or Push-Pull). RESET changes from high to low when the VCC input drops below the selected reset threshold (or RST_IN1/ RST_IN2 for the MAX6701/MAX6702/MAX6703), MR is pulled low, or the watchdog triggers a reset (MAX6704 only). RESET remains low for the reset timeout period after the reset conditions are terminated. Active-Low Watchdog Output (Open-Drain or Push-Pull). WDO is asserted whenever the watchdog times out and does not deassert until the watchdog is cleared. WDO also asserts when VCC or RST_IN_ are below reset thresholds or MR is pulled low. WDO deasserts after a valid WDI transition (without a reset timeout period). Active-High Reset Output (Push-Pull). RESET changes from low to high when the VCC input drops below the selected reset threshold (or RST_IN1/RST_IN2 for MAX6701/MAX6702/MAX6703), MR is pulled low, or the watchdog triggers a reset (MAX6704 only). RESET remains high for the reset timeout period after the reset conditions are terminated. *RESET active-high for the MAX6702/MAX6706. Input for User Adjustable VCC2 Monitor. High-impedance input for second internal reset comparator. Connect this pin to an external resistive-divider network to set the reset threshold voltage; 0.62V (typ) threshold. Connect to VCC when not used. Reset is asserted when either VCC, RST_IN1, or RST_IN2 are below threshold. Input for User Adjustable VCC3 Monitor. High-impedance input for third internal reset comparator. Connect this pin to an external resistive-divider network to set the reset threshold voltage; 0.62V (typ) threshold. Connect to VCC when not used. Reset is asserted when either VCC, RST_IN1, or RST_IN2 are below threshold.
8
--
8
--
WDO
7*
8
7*
8
RESET
4
--
--
--
RST_IN1
5
--
--
--
RST_IN2
Detailed Description
Reset Output
A microprocessor's (P's) reset input starts the P in a known state. The MAX6701-MAX6708 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
6
stays low. After VCC rises above the reset threshold, an internal timer holds RESET low for about 200ms. RESET pulses low whenever VCC dips below the reset threshold, including brownout conditions. If a 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.
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Low-Voltage, SOT23 P Supervisors with Power Fail In/Out, Manual Reset, and Watchdog Timer MAX6701-MAX6708
VCC
WDI
6 VCC 50k
WATCHDOG TIMER
8
WDO
1 2
50k
MAX6704 MAX6708
8
RESET
MR VCC
MR 1 VCC 2 RESET GENERATOR 7 RESET (RESET)
RESET GENERATOR
7
RESET
WATCHDOG TIMER
6
WDI (MAX6704 ONLY)
VREF PFI 4
MAX6705 MAX6706 MAX6707
VREF
5
PFI
4 5 PFO
PFO
0.62V
0.62V ( ) ARE FOR MAX6706 ONLY. 3 GND
3 GND
Figure 1. MAX6705/MAX6706/MAX6707 Block Diagram
Figure 2. MAX6704/MAX6708 Block Diagram
The MAX6702/MAX6704/MAX6706/MAX6708 activehigh RESET output is simply the complement of the RESET output, and is guaranteed to be valid with VCC down to 1V. (See Figure 4.)
Watchdog Timer
The MAX6701-MAX6707 watchdog circuit monitors the P's activity. If the P does not toggle the watchdog input (WDI) within 1.6s, WDO goes low. When RESET is asserted, the watchdog timer stays cleared and does not count. As soon as reset is released, the timer will start counting. WDO deasserts after a valid transition is detected at WDI. Pulses as short as 50ns can be detected. Typically, WDO will be connected to the nonmaskable interrupt (NMI) input 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, but RESET goes low simultaneously, and thus overrides the NMI. The MAX6704 watchdog circuit does not have an independent watchdog output (WDO). If the P does not toggle the watchdog input within 1.6s, the MAX6704 will assert a reset output pulse for the reset timeout period. (See Figure 5.)
debounced by the reset pulse width. MR is 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 MAX6701-MAX6708. Simply connect WDO to MR.
Power-Fail Comparator
The uncommitted power-fail comparator can be used for various purposes because its noninverting input and output are externally available. The inverting input is internally connected to a 0.62V 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 0.62V just before the regulator drops out. Use PFO to interrupt the P so it can prepare for an orderly power-down. The low input current at this pin allows for large resistor values in the divider.
Reset-In Information
The MAX6701/MAX6702/MAX6703 include two adjustable reset inputs for monitoring up to a total of three system voltages (including VCC). The thresholds for the monitored RST_IN supplies are externally set with resistor-divider networks (Figure 6). The reset output is asserted if any of the monitored supplies (VCC, RST_IN1, or RST_IN2) go below its specified threshold and remain asserted for the reset timeout period after all supplies are above their thresholds.
Manual Reset
The manual reset input (MR) allows reset to be triggered by a pushbutton switch. The switch is effectively
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7
Low-Voltage, SOT23 P Supervisors with Power Fail In/Out, Manual Reset, and Watchdog Timer MAX6701-MAX6708
VCC
VTH VCC
50k
VTH tRP tRP
MR VCC
MAX6701 MAX6702 MAX6703
VCC RESET 0
RESET GENERATOR
RESET (RESET) VCC WDO MR 0 tMD VCC WDO WATCHDOG TIMER WDI RST_IN2
VREF RST_IN1
0.62V
0.62V
0 MR EXTERNALLY DRIVEN LOW
Figure 3. MAX6701/MAX6702/MAX6703 Block Diagram
Applications Information
Ensuring a Valid RESET Output Down to VCC = 0
When V CC falls below 1V, the MAX6701-MAX6708 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 7, any stray charge or leakage currents will be drained to ground, holding RESET low. A resistor value (R1) is not critical; 100k is large enough not to load RESET and small enough to pull RESET to ground. This application works for push-pull output only (not for open-drain resets).
Figure 4. MAX6705/MAX6706/MAX6707 RESET, MR, WDO, and WDI Timing. The MAX6706 RESET output is the inverse of the RESET shown.
tWDI WDI +5V 0 +5V WDO 0 +5V RESET 0 RESET EXTERNALLY TRIGGERED BY MR tRP tWD tWD
Monitoring Other System Voltages
Other systems can be monitored by connecting a voltage divider to PFI and adjusting the ratio appropriately. In noisy systems, 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 VCC supply line. Connect PFO to MR to initiate a reset output pulse when PFI drops below 0.62V. Figure 8 shows the MAX6701-MAX6708 configured to assert a reset output when the secondary supply falls below the reset threshold.
(RESET)
+5V 0 +5V MR 0
( ) ARE FOR MAX6706 ONLY.
Figure 5. MAX6705/MAX6706/MAX6707 Watchdog Timing
8
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Low-Voltage, SOT23 P Supervisors with Power Fail In/Out, Manual Reset, and Watchdog Timer MAX6701-MAX6708
VEXTERNAL R1
MAX6701- MAX6708
PFI, RST_IN1, OR RST_IN2
MAX6701 MAX6704 MAX6705 MAX6708
RESET R1 (100k)
R2
0.62V
VEXT-TH = 1 + R1 x 0.62V R2
(
)
R1 = R2 x
EXT-TH (V0.62 - 1)
Figure 7. RESET Valid to Ground Circuit
WHERE VEXT-TH IS THE EXTERNAL VOLTAGE TRIP LEVEL.
Figure 6. Calculating Adjustable Voltage Thresholds
0.9V 3.3V
I/O SUPPLY VCC PFI RESET (RESET) MAX6704- MR MAX6708 PFO RESET P
CORE SUPPLY
() ARE FOR MAX6704/MAX6706/MAX6708 ONLY
Figure 8. Monitoring Other System Voltages
Threshold Suffix Guide
SUFFIX L M T S R Z Y Bold indicates standard version. RESET THRESHOLD (V) 4.63 4.38 3.08 2.93 2.63 2.32 2.19
Ordering Information (continued)
PART MAX6704_KA-T MAX6705_KA-T MAX6706_KA-T MAX6707_KA-T MAX6708_KA-T TEMP. RANGE -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C PIN-PACKAGE SOT23-8 SOT23-8 SOT23-8 SOT23-8 SOT23-8
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9
Low-Voltage, SOT23 P Supervisors with Power Fail In/Out, Manual Reset, and Watchdog Timer MAX6701-MAX6708
Pin Configurations (continued)
MR VCC GND
1 2
8 7
RESET RESET WDI PFO
MR VCC GND
1 2 3
8 7
WDO RESET (RESET) WDI PFO
MR VCC GND
1 2
8 7
RESET RESET N.C. PFO
MAX6704
3 6 5
MAX6705 MAX6706 MAX6707
MAX6708
3 6 5
6 5
PFI 4
PFI 4
PFI 4
SOT23-8
SOT23-8
( ) ARE FOR MAX6706 ONLY
SOT23-8
Selector Guide
PART MAX6701 MAX6702 MAX6703 MAX6704 MAX6705 MAX6706 MAX6707 MAX6708 RESET PP-LOW RESET PP-HIGH RESET OD-LOW WDI PP PP OD WDO PP PP OD PP PP PP OD PP PFI, PFO RST_IN1, RST_IN2
PP = Push-Pull OD = Open-Drain
Chip Information
TRANSISTOR COUNT: 716 PROCESS: BiCMOS
UNREGULATED DC
Typical Operating Circuit
DC/DC REGULATOR P VCC PFI MR RESET WDI MAX6705 WDO MAX6706 MAX6707 PFO VCC RESET I/O NMI INTERRUPT
PUSHBUTTON SWITCH
10
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Low-Voltage, SOT23 P Supervisors with Power Fail In/Out, Manual Reset, and Watchdog Timer
Package Information
SOT23, 8L.EPS
MAX6701-MAX6708
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11 (c) 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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