MAX808MCSA ,Supervisory circuit with +-1.5% reset accuracy. Reset threshold(typ) 4.425V. CMOS RAM write protection..ELECTRICAL CHARACTERISTICS(V = 4.6V to 5.5V for the MAX80_L, V = 4.5V to 5.5V for the MAX80_N, V = ..
MAX808MCSA ,Supervisory circuit with +-1.5% reset accuracy. Reset threshold(typ) 4.425V. CMOS RAM write protection..features include a watch-' RESET Output (MAX808)dog for the MAX801 and CMOS RAM write protectionRES ..
MAX808MCSA ,Supervisory circuit with +-1.5% reset accuracy. Reset threshold(typ) 4.425V. CMOS RAM write protection..features include a watch-' RESET Output (MAX808)dog for the MAX801 and CMOS RAM write protectionRES ..
MAX808MEPA ,Supervisory circuit with +-1.5% reset accuracy. Reset threshold(typ) 4.425V. CMOS RAM write protection..General Description ________
MAX808NCSA ,Supervisory circuit with +-1.5% reset accuracy. Reset threshold(typ) 4.575V. CMOS RAM write protection..Applications' Power Switching:250mA in V ModeCCComputers20mA in Battery-Backup ModeControllers' Max ..
MAX808NCSA+ ,8-Pin µP Supervisory Circuits with ±1.5% Reset Accuracyfeatures include a watch-♦ RESET Output (MAX808)dog for the MAX801 and CMOS RAM write protectionRES ..
MB71A38-25 , PROGRAMMABLE SCHOTTKY 16384-BIT READ ONLY MEMORY
MB8117800A-60 ,2 M X 8 BIT FAST PAGE MODE DYNAMIC RAMapplications where very low power dissipation and high bandwidth are basic requirements of the desi ..
MB81464- ,MOS 262144 Bit DRAMfeatures page mode which allows high speed
random access of up to 256 bits within the same tow.
..
MAX808LCSA-MAX808MCSA-MAX808MEPA-MAX808NCSA-MAX808NESA
Supervisory circuit with +-1.5% reset accuracy. Reset threshold(typ) 4.675V. Watchdog.
_______________General DescriptionThe MAX801/MAX808 microprocessor (µP) supervisory
circuits monitor and control the activities of +5V µPs by
providing backup-battery switchover, low-line indica-
tion, and µP reset. Additional features include a watch-
dog for the MAX801 and CMOS RAM write protection
for the MAX808.
The MAX801/MAX808 offer a choice of reset-threshold
voltage (denoted by suffix letter): 4.675V (L), 4.575V
(N), and 4.425V (M). These devices are available in
8-pin DIP and SO packages.
________________________ApplicationsComputers
Controllers
Intelligent Instruments
Critical µP Power Monitoring
Portable/Battery-Powered Equipment
Embedded Systems
____________________________FeaturesPrecision Voltage Monitoring, ±1.5% Reset
Accuracy200ms Power-OK/Reset Time DelayRESET Output (MAX808)
RESET and RESET Outputs (MAX801)Watchdog Timer (MAX801)On-Board Gating of Chip-Enable Signals (MAX808):
Memory Write-Cycle Completion
3ns CE Gate Propagation Delay1µA Standby CurrentPower Switching:
250mA in VCCMode
20mA in Battery-Backup ModeMaxCap™/SuperCap™CompatibleRESET Guaranteed Valid to VCC= 1VLow-Line Threshold 52mV Above Reset
Threshold
MAX801L/M/N, MAX808L/M/N
8-Pin µP Supervisory Circuits
with ±1.5% Reset Accuracy
________________________________________________________________Maxim Integrated Products1
__________Typical Operating Circuit19-1086; Rev 0; 6/96
& the latest literature: http://, MaxCap is a trademark of The Carborundum Corp.
SuperCap is a trademark of Baknor Industries.
Pin Configurations appear at end of data sheet.**Contact factory for availability and processing to MIL-STD-883.
MAX801L/M/N, MAX808L/M/N
8-Pin µP Supervisory Circuits
with ±1.5% Reset Accuracy_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VCC= 4.6V to 5.5V for the MAX80_L, VCC= 4.5V to 5.5V for the MAX80_N, VCC= 4.35V to 5.5V for the MAX80_M; VBATT= 2.8V;= TMINto TMAX. Typical values are at VCC= 5V and TA= +25°C, unless otherwise noted.)
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.
Input Voltage (with respect to GND)
VCC.......................................................................-0.3V to +6V
VBATT....................................................................-0.3V to +6V
All Other Pins........................................-0.3V to (VOUT+ 0.3V)
Input Current
VCCPeak..........................................................................1.0A
VCCContinuous............................................................500mA
IBATTPeak.....................................................................250mA
IBATTContinuous............................................................50mA
GND................................................................................50mA
All Other Inputs...............................................................50mA
Output Current
OUT Peak..........................................................................1.0A
OUT Continuous............................................................500mA
All Other Outputs............................................................50mA
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
CERDIP (derate 8.00mW/°C above +70°C).................640mW
Operating Temperature Ranges
MAX801_C_A/MAX808_C_A...............................0°C to +70°C
MAX801_E_A/MAX808_E_A............................-40°C to +85°C
MAX801_MJA/MAX808_MJA.........................-55°C to +125°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10sec).............................+300°C
MAX801L/M/N, MAX808L/M/N
8-Pin µP Supervisory Circuits
with ±1.5% Reset Accuracy
_______________________________________________________________________________________3
ELECTRICAL CHARACTERISTICS (continued)(VCC= 4.6V to 5.5V for the MAX80_L, VCC= 4.5V to 5.5V for the MAX80_N, VCC= 4.35V to 5.5V for the MAX80_M; VBATT= 2.8V; = TMINto TMAX. Typical values are at VCC= 5V and TA= +25°C, unless otherwise noted.)
VCC SUPPLY CURRENT vs. TEMPERATURE
(NORMAL OPERATING MODE)
MAX801/808-01
TEMPERATURE (°C)
SUPPLY CURRENT (105-3545125585
BATTERY SUPPLY CURRENT vs.
TEMPERATURE (BATTERY-BACKUP MODE)
MAX801/808-02
TEMPERATURE (°C)
BATTERY SUPPLY CURRENT (100-4040120080
MAX808
CHIP-ENABLE PROPAGATION DELAY
vs. TEMPERATURE
MAX801/808-03
TEMPERATURE (°C)
PROPAGATION DELAY (ns)100-4040120080
MAX801L/M/N, MAX808L/M/N
8-Pin µP Supervisory Circuits
with ±1.5% Reset Accuracy_______________________________________________________________________________________
Note 1:Either VCCor VBATTcan go to 0V if the other is greater than 2V.
Note 2:The supply current drawn by the MAX80_ from the battery (excluding IOUT) typically goes to 15µA when (VBATT- 0.1V) <
VCC< VBATT. In most applications, this is a brief period as VCCfalls through this region (see Typical Operating
Characteristics).
Note 3:“+” = battery-discharging current, “-” = battery-charging current.
Note 4:WDI is internally connected to a voltage divider between VCCand GND. If unconnected, WDI is typically driven to 1.8V,
disabling the watchdog function.
Note 5:The chip-enable resistance is tested with VCEIN= VCC / 2 and ICEIN= 1mA.
Note 6:The chip-enable propagation delay is measured from the 50% point at CEIN to the 50% point at CEOUT.
Note 7:If CEIN goes high, CEOUT goes high immediately and stays high until reset is deasserted and CEIN is low.
ELECTRICAL CHARACTERISTICS (continued)(VCC= 4.6V to 5.5V for the MAX80_L, VCC= 4.5V to 5.5V for the MAX80_N, VCC= 4.35V to 5.5V for the MAX80_M; VBATT= 2.8V; = TMINto TMAX. Typical values are at VCC= 5V and TA= +25°C, unless otherwise noted.)
__________________________________________Typical Operating Characteristics(VCC= 5V, VBATT= 2.8V, no load, TA= +25°C, unless otherwise noted.)
MAX801L/M/N, MAX808L/M/N
8-Pin µP Supervisory Circuits
with ±1.5% Reset Accuracy
_______________________________________________________________________________________550100
MAX808
CHIP-ENABLE PROPAGATION DELAY
vs. CE OUT LOAD CAPACITANCEMAX801/808-04
CLOAD (pF)
PROPAGATION DELAY (ns)
RESET THRESHOLD
vs. TEMPERATURE
MAX801/808-07
TEMPERATURE (°C)
RESET THRESHOLD (V)100-4040120080
BATT to OUT ON-RESISTANCE
vs. TEMPERATURE
MAX801/808-05
TEMPERATURE (°C)
BATT
TO V
OUT
ON-RESISTANCE (100-4040120080
VCC to OUT ON-RESISTANCE
vs. TEMPERATURE
MAX801/808-06
TEMPERATURE (°C)
CC
TO V
OUT
ON-RESISTANCE (100-4040120080
RESET TIMEOUT PERIOD
vs. TEMPERATURE (VCC RISING)
MAX801/808-08
TEMPERATURE (°C)
RESET TIMEOUT PERIOD (ms)100-4040120080
LOWLINE to RESET THRESHOLD
vs. TEMPERATURE (VCC FALLING)
MAX801/808-09
TEMPERATURE (°C)
LOWLINE TO RESET THRESHOLD (mV)100-4040120080
____________________________Typical Operating Characteristics (continued)(VCC= 5V, VBATT= 2.8V, no load, TA= +25°C, unless otherwise noted.)
4.40
LOWLINE THRESHOLD
vs. TEMPERATURE (VCC RISING)
MAX801/808-10
TEMPERATURE (°C)
LOWLINE THRESHOLD (V)100-4040120080
LOWLINE COMPARATOR PROPAGATION
DELAY vs. TEMPERATURE (VCC FALLING)
MAX801/808-11
TEMPERATURE (°C)
PROPAGATION DELAY (100-4040120080
RESET COMPARATOR PROPAGATION
DELAY vs. TEMPERATURE (VCC FALLING)
MAX801/808-12
TEMPERATURE (°C)
PROPAGATION DELAY (100-4040120080
MAX801L/M/N, MAX808L/M/N
8-Pin µP Supervisory Circuits
with ±1.5% Reset Accuracy_______________________________________________________________________________________BATTERY CURRENT
vs. INPUT SUPPLY VOLTAGE
MAX801/808-13
VCC (V)
BATTERY CURRENT (
VCC to OUT VOLTAGE vs.
OUTPUT CURRENT
MAX801/808-15
IOUT (mA)
TO V
OUT
VOLTAGE (mV)
BATT to OUT VOLTAGE vs.
OUTPUT CURRENT
MAX801/808-14
IOUT (mA)
BATT
TO V
OUT
VOLTAGE (mV)
MAXIMUM TRANSIENT DURATION vs.
RESET THRESHOLD OVERDRIVE
MAX801/808-16
RESET THRESHOLD OVERDRIVE (mV)
MAXIMUM TRANSIENT DURATION (
____________________________Typical Operating Characteristics (continued)(VCC= 5V, VBATT= 2.8V, no load, TA= +25°C, unless otherwise noted.)
______________________________________________________________Pin Description
