SOT23, Low-Power Supervisory Circuits with Battery Backup Chip-Enable

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SOT23, Low-Power Supervisory Circuits with Battery Backup Chip-Enable

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19-1658; 6/01
SOT23, Low-Power Supervisory Circuits with Battery Backup Chip-Enable Gating
MAX6365-MAX6368 supervisory circuits simplify power-supply monitoring, battery-backup control functions, memory write protection microprocessor (µP) systems. circuits significantly improve size, accuracy, reliability modern systems with ultrasmall integrated solution. These devices perform four basic system functions: Provide reset output during supply powerup, power-down, brownout conditions. Internally control backup-battery switching maintain data low-power operation CMOS RAM, CMOS µPs, real-time clocks, other digital logic when main supply fails. Provide memory write protection through internal chip-enable gating during supply processor faults. Include following options: manual reset input (MAX6365), watchdog timer function (MAX6366), battery-on output (MAX6367), auxiliary user-adjustable reset input (MAX6368). MAX6365-MAX6368 operate from supply voltages 1.2V. factory preset reset threshold voltages range from 2.32V 4.63V (see Ordering Information). addition, each part offered three reset output versions: push-pull active low, open-drain active low, open-drain active high (see Selector Guide). MAX6365-MAX6368 available miniature 8-pin SOT23 packages.
Features
+1.2V Operating Supply Voltage (VCC VBATT) Precision Monitoring +5.0V, +3.3V, +3.0V, +2.5V Power-Supply Voltages On-Board Gating Chip-Enable Signals, 1.5ns Propagation Delay Debounced Manual Reset Input (MAX6365) Watchdog Timer, 1.6s Timeout (MAX6366) Battery-On Output Indicator (MAX6367) Auxiliary User-Adjustable RESET (MAX6368) 10µA Quiescent Supply Current Three Available Output Structures Push-Pull RESET Open-Drain RESET Open-Drain RESET RESET/RESET Valid Down 1.2V Guaranteed (VCC VBATT) Power-Supply Transient Immunity 150ms Reset Timeout Period Miniature 8-Pin SOT23 Package
MAX6365-MAX6368
Ordering Information
PART* 5LKA_ MAX6365PKA_ MAX6365HKA_ 6LKA_ MAX6366PKA_ MAX6366HKA_ 7LKA_ MAX6367PKA_ MAX6367HKA_ 8LKA_ MAX6368PKA_ MAX6368HKA_ TEMP. RANGE -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C PINPACKAGE SOT23-8 SOT23-8 SOT23-8 SOT23-8 SOT23-8 SOT23-8 SOT23-8 SOT23-8 SOT23-8 SOT23-8 SOT23-8 SOT23-8
Applications
Critical µP/µC Power Monitoring Machines Industrial Control Computers/Controllers Portable/BatteryPowered Equipment Set-Top Boxes Equipment
Configurations
VIEW
RESET, RESET BATT
MAX6365
*These parts offer choice reset threshold voltages. From Reset Threshold Ranges table, insert desired threshold voltage code blank complete part number. parts come tape-and-reel only must ordered 2500-piece increments. Device Marking Codes complete parts list, including marks standard threshold versions. Selector Guide listing device features.
SOT23 Configurations continued data sheet.
Typical Operating Circuit appears data sheet.
Maxim Integrated Products
pricing, delivery, ordering information, please contact Maxim/Dallas Direct! 1-888-629-4642, visit Maxim's website www.maxim-ic.com.
SOT23, Low-Power Supervisory Circuits with Battery Backup Chip-Enable Gating MAX6365-MAX6368
ABSOLUTE MAXIMUM RATINGS
Terminal Voltages (with respect GND) VCC, BATT, OUT.-0.3V RESET (open drain), RESET (open drain) .-0.3V BATT RESET (push-pull), RESET WDI, .-0.3V (VOUT 0.3V) .-0.3V (VCC 0.3V) Input Current Peak Continuous .250mA BATT Peak .250mA BATT Continuous .40mA .75mA Output Current .Short-Circuit Protected RESET, RESET, BATT OUT.20mA Continuous Power Dissipation +70°C) 8-Pin SOT23 (derate 8.75mW/°C above +70°C).700mW Operating Temperature Range .-40°C +85°C Storage Temperature Range .-65°C +150°C Junction Temperature .+150°C Lead Temperature (soldering, 10s) .+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated operational sections specifications implied. Exposure absolute maximum rating conditions extended periods affect device reliability.
ELECTRICAL CHARACTERISTICS
(VCC +2.4V +5.5V, VBATT +3.0V, VCC, reset asserted, -40°C +85°C. Typical values +25°C, unless otherwise noted.) (Note
PARAMETER Operating Voltage Range (Note Supply Current (Excluding IOUT) Supply Current BatteryBackup Mode (Excluding IOUT) BATT Standby Current SYMBOL VCC, VBATT load 2.8V load, VBATT 2.8V, 5.5V (VBATT 0.2V) 3.6V 5.5V IBACK IBATT +25°C -40°C +85°C +25°C -40°C +85°C -0.1 -1.0 CONDITIONS 0.02 0.02 VBATT VBATT 0.15 VBATT 0.15 4.50 4.25 3.00 2.85 2.55 2.25 4.63 4.38 3.08 2.93 2.63 2.32 4.75 4.50 3.15 3.00 2.70 2.38 UNITS
4.75V, IOUT 150mA On-Resistance 3.15V, IOUT 65mA 2.38V, IOUT 25mA VBATT 4.5V, IOUT 20mA Output Voltage BatteryBackup Mode VOUT VBATT 3.0V, IOUT 10mA VBATT 2.25V, IOUT Battery-Switchover Threshold (VCC VBATT) MAX636_ _KA46 MAX636_ _KA44 Reset Threshold MAX636_ _KA31 MAX636_ _KA29 MAX636_ _KA26 MAX636_ _KA23 Falling Reset Delay falling 10V/ms Power-up Power-down
SOT23, Low-Power Supervisory Circuits with Battery Backup Chip-Enable Gating
ELECTRICAL CHARACTERISTICS (continued)
(VCC +2.4V +5.5V, VBATT +3.0V, VCC, reset asserted, -40°C +85°C. Typical values +25°C, unless otherwise noted.) (Note
PARAMETER Reset Active Timeout Period SYMBOL Reset asserted, VBATT Reset asserted (MAX636_L only) Reset asserted Reset asserted, VBATT (MAX636_H only) (Note ISINK 1.6mA, 2.1V ISINK 100µA, 1.2V ISOURCE 500µA, VTH(MAX) ISINK 1.6mA, (MAX) ISOURCE 1mA, 1.8V ISOURCE 200µA, 1.2V 3.3V 3.3V tWDI Input Voltage Input Current BATT (MAX6367 only) Output Voltage Output Short-Circuit Current ISINK 3.2mA, VBATT 2.1V Sink current, Source current, VBATT -1.0 1.00 1.65 2.25 CONDITIONS UNITS
MAX6365-MAX6368
RESET Output Voltage RESET Output Voltage
RESET Output Leakage Current MANUAL RESET (MAX6365 only)
ILKG
MAX636_P MAX636_H only
Input Voltage Pullup Resistance Minimum Pulse Width Glitch Immunity Reset Delay WATCHDOG (MAX6366 only) Watchdog Timeout Period Minimum Input Pulse Width
SOT23, Low-Power Supervisory Circuits with Battery Backup Chip-Enable Gating MAX6365-MAX6368
ELECTRICAL CHARACTERISTICS (continued)
(VCC +2.4V +5.5V, VBATT +3.0V, VCC, reset asserted, -40°C +85°C. Typical values +25°C, unless otherwise noted.) (Note
PARAMETER RESET (MAX6368 only) RESET Threshold RESET Leakage Current RESET Reset Delay CHIP-ENABLE GATING Leakage Current Resistance Short-Circuit Current Propagation Delay Reset asserted Reset asserted (Note Reset asserted, source, CLOAD 50pF 4.75V 3.15V VBATT 2.2V, ISOURCE Reset-to-CE Delay VBATT 0.75 50mV, RESET falling VRTH 1.185 1.235 ±0.01 1.285 SYMBOL CONDITIONS UNITS
VBATT, ISOURCE 100µA Output Voltage High
Note Note Note Note
devices 100% production tested +25°C. Limits over temperature guaranteed design. VBATT anytime, down VBATT active (except startup). RESET pulled OUT. Specifications apply BATT. chip-enable resistance tested with VTH(MAX) VCC/2.
Typical Operating Characteristics
+25°C, unless otherwise noted.)
SUPPLY CURRENT TEMPERATURE LOAD)
MAX6365/8-01
BATTERY SUPPLY CURRENT (BACKUP MODE) TEMPERATURE
MAX6365/8-02
BATT-TO-OUT ON-RESISTANCE TEMPERATURE
IOUT 25mA VBATT 2.8V VBATT 5.0V VBATT 2.0V
MAX6365/8-03
SUPPLY CURRENT (µA)
BATTERY SUPPLY CURRENT (µA) VBATT 2.0V
VBATT 2.8V
TEMPERATURE (°C)
TEMPERATURE (°C)
BATT-TO-OUT ON-RESISTANCE
5.0V VBATT
TEMPERATURE (°C)
SOT23, Low-Power Supervisory Circuits with Battery Backup Chip-Enable Gating
Typical Operating Characteristics (continued)
+25°C, unless otherwise noted.)
ON-RESISTANCE TEMPERATURE
MAX6365/8-04
MAX6365-MAX6368
RESET TIMEOUT PERIOD TEMPERATURE
MAX6365/8-05
RESET PROPAGATION DELAY TEMPERATURE
PROPAGATION DELAY (µs) 10V/ms 1V/ms FALLING 0.25V/ms
MAX6365/8-06
ON-RESISTANCE TEMPERATURE (°C) 4.5V IOUT 150mA 3.0V IOUT 65mA 2.3V IOUT 25mA
RESET TIMEOUT PERIOD (ms)
TEMPERATURE (°C)
TEMPERATURE (°C)
RESET THRESHOLD TEMPERATURE
MAX6365/8-07
MAXIMUM TRANSIENT DURATION RESET THRESHOLD OVERDRIVE
MAX6365/8-08
BATTERY SUPPLY CURRENT SUPPLY VOLTAGE
BATTERY SUPPLY CURRENT (µA) VBATT 2.3V VBATT 2.5V VBATT 2.8V 2.93V
MAX6365/8-09
MAX636_ (VTH 4.63V) THRESHOLD MAX636_ (VTH 2.63V) TEMPERATURE (°C)
MAXIMUM TRANSIENT DURATION (µs) 1000 MAX636_ (VTH 2.63V) RESET OCCURS ABOVE CURVE MAX636_ (VTH 4.63V)
10,000
RESET THRESHOLD OVERDRIVE (mV)
SOT23, Low-Power Supervisory Circuits with Battery Backup Chip-Enable Gating MAX6365-MAX6368
Typical Operating Characteristics (continued)
+25°C, unless otherwise noted.)
MAX6368 RESET THRESHOLD TEMPERATURE
MAX6365/8
MAX6368 RESET RESET PROPAGATION DELAY TEMPERATURE
PROPAGATION DELAY (µs) 50mV
MAX6365/8-11
CHIP-ENABLE PROPAGATION DELAY LOAD CAPACITANCE
DRIVER SOURCE IMPEDANCE
MAX6365/8-12
1.236
1.235
PROPAGATION DELAY (ns)
VRTH
1.234 TEMPERATURE (°C)
TEMPERATURE (°C)
CLOAD (pF)
ON-RESISTANCE TEMPERATURE
MAX6365/8-13
MAX6366 WATCHDOG TIMEOUT PERIOD TEMPERATURE
WATCHDOG TIMEOUT PERIOD 5.0V VBATT
MAX6365/8-14
ON-RESISTANCE
3.0V
5.0V VCC/2 VBATT TEMPERATURE (°C)
TEMPERATURE (°C)
SOT23, Low-Power Supervisory Circuits with Battery Backup Chip-Enable Gating
Description
NAME FUNCTION Active-High Reset Output. RESET asserts high continuously when below reset threshold (VTH), low, RESET low. asserts pulses when internal watchdog times out. RESET remains asserted reset timeout period (tRP) after rises above reset threshold, after manual reset input goes from high, after RESET goes high, after watchdog triggers reset event. RESET open-drain active-high reset output. Active-Low Reset Output. RESET asserts continuously when below reset threshold (VTH), manual reset input low, RESET low. asserts pulses when internal watchdog times out. RESET remains asserted reset timeout period (tRP) after rises above reset threshold, after manual reset input goes from high, after RESET goes high, after watchdog triggers reset event. MAX636_L active-low pushpull output, while MAX636_P active-low open-drain output. Chip-Enable Input. input chip-enable gating circuitry. Connect used. Ground MAX6365 Manual-Reset Input. Maintaining logic asserts reset. Reset output remains asserted long reset timeout period (tRP) after transitions from high. Leave unconnected, connect used. internal pullup VCC. MAX6366 Watchdog Input. remains high longer than watchdog timeout period internal watchdog timer runs reset pulse triggered reset timeout period (tRP). internal watchdog clears whenever reset asserts whenever sees rising falling edge (Figure MAX6367 Battery-On Output. BATT goes high when battery backup mode. MAX6368 Reset Input. When RESET falls below 1.235V, reset asserts. Reset output remains asserted long RESET least after RESET goes high. Supply Voltage, 1.2V 5.5V. Reset asserts when drops below reset threshold voltage (VTH). Reset remains asserted until rises above least after rises above VTH. Output. sources from when reset from greater BATT when below reset threshold. Backup-Battery Input. When falls below reset threshold, switches BATT VBATT 20mV greater than When rises 20mV above VBATT, switches 40mV hysteresis prevents repeated switching falls slowly. Chip-Enable Output. goes only when reset asserted. when reset asserted, will stay 12µs (typ) until goes high, whichever occurs first.
MAX6365-MAX6368
RESET
RESET
BATT RESET
BATT
SOT23, Low-Power Supervisory Circuits with Battery Backup Chip-Enable Gating MAX6365-MAX6368
Functional Diagram
BATT (MAX6367 ONLY)
1.235V
MAX6365 MAX6366 MAX6367 MAX6368
CHIP-ENABLE OUTPUT CONTROL
BATT (MAX6365 ONLY) RESET GENERATOR
RESET (RESET)
(MAX6366 ONLY) RESET (MAX6368 ONLY)
WATCHDOG TRANSITION DETECTOR
WATCHDOG TIMER
1.235V
Detailed Description
Typical Operating Circuit shows typical connection MAX6365-MAX6368. powers static random-access memory (SRAM). greater than reset threshold (VTH), lower than higher than VBATT, connected OUT. lower than less than VBATT, BATT connected OUT. supplies 150mA from VCC. battery-backup mode, internal MOSFET connects backup battery OUT. on-resistance MOSFET function backup-battery voltage shown BATT-to-OUT On-Resistance Temperature graph Typical Operating Characteristics.
Chip-Enable Signal Gating
MAX6365-MAX6368 provide internal gating signals prevent erroneous data from being written
CMOS event power failure. During normal operation, gate enabled passes transitions. When reset asserts, this path becomes disabled, preventing erroneous data from corrupting CMOS RAM. these devices series transmission gate from OUT. propagation delay from allows devices used with most high-speed DSPs. During normal operation, connected through on-resistance transmission gate. This valid when reset asserted. high when reset asserted, remains high regardless subsequent transitions during reset event. when reset asserted, held 12µs allow completion read/write operation (Figure After 12µs delay expires,
SOT23, Low-Power Supervisory Circuits with Battery Backup Chip-Enable Gating
goes high stays high regardless subsequent transitions during reset event. When disconnected from actively pulled OUT. propagation delay through chip-enable circuitry depends both source impedance drive capacitive loading OUT. chip-enable propagation delay production tested from point point OUT, using driver 50pF load capacitance. Minimize capacitive load minimize propagation delay, low-output-impedance driver.
MAX6365-MAX6368
Table Input Output Status Battery-Backup Mode
BATT RESET/RESET BATT RESET STATUS Disconnected from Connected BATT Connected OUT. Current drawn from battery less than VBATT 2.8V, excluding IOUT) when Asserted High state Inputs ignored Connected
Backup-Battery Switchover
brownout power failure, necessary preserve contents RAM. With backup battery installed BATT, MAX6365-MAX6368 automatically switch backup power when falls. MAX6367 BATT output that goes high battery-backup mode. These devices require conditions before switching battery-backup mode: must below reset threshold. must below VBATT. Table lists status inputs outputs battery-backup mode. devices power only voltage source BATT. only powers from startup.
Manual Reset Input (MAX6365 Only)
Many µP-based products require manual reset capability, allowing user external logic circuitry initiate reset. MAX6365, logic asserts reset. Reset remains asserted while minimum 150ms (tRP) after returns high. internal pullup resistor VCC. This input driven with TTL/CMOS logic levels with open-drain/collector outputs. Connect normally open momentary switch from create manual reset function; external debounce circuitry required. driven from long cables device used noisy environment, connect 0.1µF capacitor from provide additional noise immunity.
BATT RESET THRESHOLD
RESET-TO-CE DELAY (12µs) RESET RESET
GOES HIGH BEFORE RESET ASSERTS, GOES HIGH WITHOUT DELAY GOES HIGH.
Figure Reset Chip-Enable Timing
SOT23, Low-Power Supervisory Circuits with Battery Backup Chip-Enable Gating MAX6365-MAX6368
RESET
WATCHDOG TIMEOUT PERIOD RESET TIMEOUT PERIOD
Figure MAX6366 Watchdog Timeout Period Reset Active Time
Watchdog Input (MAX6366 Only)
watchdog monitors activity through watchdog input (WDI). becomes inactive, reset asserts. watchdog function, connect line line. change state (high low, high, minimum 100ns pulse) resets watchdog timer. remains high longer than watchdog timeout period (tWD), internal watchdog timer runs reset pulse triggered reset timeout period (tRP). internal watchdog timer clears whenever reset asserts whenever sees rising falling edge. remains either high state, reset pulse asserts periodically after every (Figure Leave unconnected disable watchdog function.
[(VRTH VREF) Since input current RESET 25nA (max), large values used with significant loss accuracy. example, Typical Operating Circuit, MAX6368 monitors supply voltages. monitor secondary logic analog supply with 4.60V nominal programmed reset threshold, choose 100k, calculate 273k.
Reset Output
µP's reset input starts known state. MAX6365-MAX6368 supervisory circuits assert reset prevent code-execution errors during powerup, power-down, brownout conditions. RESET guaranteed logic logic high, depending device chosen (see Ordering Information). RESET RESET asserts when below reset threshold least 150ms (tRP) after rises above reset threshold. RESET RESET also asserts when (MAX6365) when RESET less than 1.235V (MAX6368). MAX6366 watchdog function will cause RESET RESET) assert pulses following watchdog timeout (Figure
BATT Indicator (MAX6367 Only)
BATT push-pull output that drives high when battery-backup mode. BATT typically sinks 3.2mA 0.1V saturation voltage. battery-backup mode, this terminal sources approximately 10µA from OUT. BATT indicate battery-switchover status supply base drive external pass transistor higher current applications (Figure
RESET Comparator (MAX6368 Only)
RESET compared internal 1.235V reference. voltage RESET less than 1.235V, reset asserts. RESET comparator undervoltage detector signal failing power supply secondary power-supply reset monitor. program reset threshold (VRTH) secondary power supply, following (see Typical Operating Circuit): VRTH VREF where VREF 1.235V. simplify resistor selection, choose value calculate
Applications Information
Operation Without Backup Power Source
MAX6365-MAX6368 provide battery-backup functions. backup power source used, connect BATT VCC.
Watchdog Software Considerations
help watchdog timer monitor software execution more closely reset watchdog different points program rather than pulsing watchdog input periodically. Figure shows flow diagram which driving
SOT23, Low-Power Supervisory Circuits with Battery Backup Chip-Enable Gating
watchdog beginning program, high beginning every subroutine loop, again when program returns beginning. program should hang subroutine, problem would quickly corrected. starting ending below reset threshold magnitude indicated (reset threshold overdrive). graph shows maximum pulse width that negative-going transient typically have without triggering reset pulse. amplitude transient increases (i.e., goes further below reset threshold), maximum allowable pulse width decreases. Typically, transient that goes 100mV below reset threshold lasts 30µs will trigger reset pulse. 0.1µF bypass capacitor mounted close provides additional transient immunity.
MAX6365-MAX6368
Replacing Backup Battery
When above VTH, backup power source removed without danger triggering reset pulse. device does enter battery-backup mode when stays above reset threshold voltage. These supervisors relatively immune short-duration, negative-going transients. Resetting when experiences only small glitches usually desirable. Typical Operating Characteristics section Maximum Transient Duration Reset Threshold Overdrive graph which reset asserted. graph produced using negative-going pulses,
Negative-Going Transients
+2.4V +5.5V START 0.1µF
BATT
BATT
MAX6367
CMOS ADDRESS DECODE A0-A15 RESET RESET SUBROUTINE PROGRAM LOOP HIGH
RETURN
Figure MAX6367 BATT Driving External Pass Transistor
Figure Watchdog Flow Diagram
SOT23, Low-Power Supervisory Circuits with Battery Backup Chip-Enable Gating MAX6365-MAX6368
Reset Threshold Ranges
SUFFIX RESET THRESHOLD RANGES 4.50 4.63 4.75 4.25 4.38 4.50 3.00 3.08 3.15 2.85 2.93 3.00 2.55 2.63 2.70 2.25 2.32 2.38
Device Marking Codes
PART MAX6365LKA23 MAX6365LKA26 MAX6365LKA29* MAX6365LKA31 MAX6365LKA44 MAX6365LKA46* MAX6365PKA23 MAX6365PKA26 MAX6365PKA29* MAX6365PKA31 MAX6365PKA44 MAX6365PKA46* MAX6365HKA23 MAX6365HKA26 MAX6365HKA29 MAX6365HKA31 MAX6365HKA44 MAX6365HKA46* MAX6366LKA23 MAX6366LKA26 MAX6366LKA29* MAX6366LKA31 MAX6366LKA44 MAX6366LKA46* MARK AAAM AAAL AAAK AAAJ AAAI AAAH AAAS AAAR AAAQ AAAP AAAO AAAN AAAY AAAX AAAW AAAV AAAU AAAT AABE AABD AABC AABB AABA AAAZ PART MAX6366PKA23 MAX6366PKA26 MAX6366PKA29* MAX6366PKA31 MAX6366PKA44 MAX6366PKA46* MAX6366HKA23 MAX6366HKA26 MAX6366HKA29 MAX6366HKA31 MAX6366HKA44 MAX6366HKA46* MAX6367LKA23 MAX6367LKA26 MAX6367LKA29* MAX6367LKA31 MAX6367LKA44 MAX6367LKA46* MAX6367PKA23 MAX6367PKA26 MAX6367PKA29* MAX6367PKA31 MAX6367PKA44 MAX6367PKA46* MARK AABK AABJ AABI AABH AABG AABF AABQ AABP AABO AABN AABM AABL AABW AABV AABU AABT AABS AABR AACC AACB AACA AABZ AABY AABX PART MAX6367HKA23 MAX6367HKA26 MAX6367HKA29 MAX6367HKA31 MAX6367HKA44 MAX6367HKA46* MAX6368LKA23 MAX6368LKA26 MAX6368LKA29* MAX6368LKA31 MAX6368LKA44 MAX6368LKA46* MAX6368PKA23 MAX6368PKA26 MAX6368PKA29* MAX6368PKA31 MAX6368PKA44 MAX6368PKA46* MAX6368HKA23 MAX6368HKA26 MAX6368HKA29 MAX6368HKA31 MAX6368HKA44 MAX6368HKA46* MARK AACI AACH AACG AACF AACE AACD AACO AACN AACM AACL AACK AACJ AACU AACT AACS AACR AACQ AACP AADA AACZ AACY AACX AACW AACV
*These standard versions available small quantities through Maxim Distribution. Sample stock generally held standard versions only. Contact factory availability nonstandard versions.
SOT23, Low-Power Supervisory Circuits with Battery Backup Chip-Enable Gating
Selector Guide
PART MAX6365LKA_ MAX6365PKA_ MAX6365HKA_ MAX6366LKA_ MAX6366PKA_ MAX6366HKA_ MAX6367LKA_ MAX6367PKA_ MAX6367HKA_ MAX6368LKA_ MAX6368PKA_ MAX6368HKA_ MANUAL RESET INPUT WATCHDOG INPUT BATT RESET RESET PUSHPULL RESET OPENDRAIN RESET OPENDRAIN CHIPENABLE GATING
MAX6365-MAX6368
Configurations (continued)
VIEW
RESET, RESET
BATT
RESET, RESET
BATT
MAX6366
BATT
MAX6367
SOT23
SOT23
RESET, RESET
BATT
MAX6368
RESET
SOT23
SOT23, Low-Power Supervisory Circuits with Battery Backup Chip-Enable Gating MAX6365-MAX6368
Typical Operating Circuit
+2.4V +5.5V 0.1µF CMOS BATT REALTIME CLOCK
0.1µF A0-A15 RESET ADDRESS DECODE
SECONDARY VOLTAGE
MAX6366 MAX6368
RESET RESET WDI**
*RESET APPLIES MAX6368 ONLY. **WDI APPLIES MAX6366 ONLY.
Chip Information
TRANSISTOR COUNT: PROCESS: CMOS
SOT23, Low-Power Supervisory Circuits with Battery Backup Chip-Enable Gating
Package Information
SOT23, 8L.EPS
MAX6365-MAX6368
Maxim cannot assume responsibility circuitry other than circuitry entirely embodied Maxim product. circuit patent licenses implied. Maxim reserves right change circuitry specifications without notice time.
Maxim Integrated Products, Gabriel Drive, Sunnyvale, 94086 408-737-7600 2001 Maxim Integrated Products Printed registered trademark Maxim Integrated Products.

SOT23, Low-Power Supervisory Circuits with Battery Backup Chip-Enable

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