MAX815TESA+ ,±1% Accuracy, Low-Power, +3V and +5V µP Supervisory CircuitsELECTRICAL CHARACTERISTICS, +5V Parts (MAX814/MAX815K, L, N)(V = 4.85V to 5.5V for MAX814K/MAX815K, ..
MAX815TESA+T ,±1% Accuracy, Low-Power, +3V and +5V µP Supervisory Circuitsfeatures.♦ ±2% Power-Fail Comparator♦ Independent Watchdog with 1.56sec Timeout_Selector Table(MAX8 ..
MAX816CPA ,【1% Accuracy, Low-Power, +3V and +5V レP Supervisory CircuitsELECTRICAL CHARACTERISTICS, +5V Parts (MAX814/MAX815K, L, N)(VCC = 4.85V to 5.5V for MAX814K/MAX815 ..
MAX816CSA ,【1% Accuracy, Low-Power, +3V and +5V レP Supervisory CircuitsFeaturesThe MAX814/MAX815/MAX816 are high-accuracy' ±1% Worst-Case Reset Threshold Accuracymicropro ..
MAX816CSA ,【1% Accuracy, Low-Power, +3V and +5V レP Supervisory CircuitsGeneral Description ________
MAX816CSA ,【1% Accuracy, Low-Power, +3V and +5V レP Supervisory CircuitsApplicationsL 4.65 4.75Medical EquipmentN 4.50 4.60ControllersT 3.00 3.06Intelligent InstrumentsMAX ..
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.
..
MB81C81A-35 ,CMOS 256K-BIT HIGH-SPEED SRAMMay 1990 00
Edition1.0 FUJITSU
M38 1 C8 1A-25/-35
CMOS 256K-BI T HIGH-SPEED SRAM
256K Words ..
MB81F643242C-10FN ,4 x 512K x 32 bit synchronous dynamic RAMFUJITSU SEMICONDUCTORADVANCED INFO. AE0.1EDATA SHEETMEMORYCMOS4 · 512 K · 32 BITSYNCHRONOUS DYNAMIC ..
MB81F643242C-10FN ,4 x 512K x 32 bit synchronous dynamic RAMfeatures a fully synchronous operation referenced to a positive edge clock whereby all operations a ..
MB81N643289-60FN ,8 x 256K x 32 bit double data rate FCRAMapplications where large memory density and high effective bandwidth arerequired and where a simple ..
MAX814KCSA+-MAX814LCSA+-MAX814NESA+-MAX814TCSA+-MAX814TESA+-MAX815KCSA+-MAX815LESA+-MAX815NESA+-MAX815TCSA+-MAX815TCSA-T-MAX815TESA+-MAX815TESA+T-MAX816CSA+-MAX816CSA-T-MAX816ESA+
±1% Accuracy, Low-Power, +3V and +5V µP Supervisory Circuits
_______________General DescriptionThe MAX814/MAX815/MAX816 are high-accuracy
microprocessor (µP) supervisory circuits that provide
power-on reset, watchdog, and power-fail functions.
They eliminate manual trimming and improve reliability
in critical applications needing high-accuracy reset
thresholds. The RESEToutput is guaranteed to be in
the correct state for VCCdown to 1V. The reset com-
parator is designed to ignore fast transients on VCC.
Reset thresholds are available for operation with a vari-
ety of 3V and 5V supply voltages.
A 75µA maximum supply current makes the MAX814/
MAX815/MAX816 ideal for use in portable equipment. All
three devices are available in 8-pin DIP and SO pack-
ages. See the Selector Tablefor a review of features.
________________________ApplicationsMedical Equipment
Controllers
Intelligent Instruments
Critical µP Power Monitoring
Portable/Battery-Powered Equipment
Set-Top Boxes
____________________________Features±1% Worst-Case Reset Threshold Accuracy4.8V, 4.7V, 4.55V, 3.03V, or Adjustable Reset
Thresholds±1% Low-Line Threshold Accuracy (MAX814)
60mV Above Reset Threshold200ms Reset Time DelayActive-Low RESETOutput
Active-High RESET Output (MAX814/MAX816)75µA Max Supply CurrentGuaranteed RESETValid to VCC= 1VManual Reset Input±2% Power-Fail ComparatorIndependent Watchdog with 1.56sec Timeout
(MAX815) Power-Supply Glitch Immunity8-Pin SO and DIP Packages
MAX814/MAX815/MAX816
±1% Accuracy, Low-Power, +3V and +5V
µP Supervisory CircuitsLOW LINEGND
PFOPFI
RESET
RESETVCC
MAX814
DIP/SOTOP VIEW
WDIGND
PFOPFI
WDO
RESETVCC
MAX815
DIP/SORESET INGND
PFOPFI
RESET
RESETVCC
MAX816
DIP/SO
__________________________________________________________Pin Configurations19-0412; Rev 1; 12/05
_____________________Selector Table
Reset Trip Thresholds table appears at end of data sheet.
Ordering Information continued at end of data sheet.
FEATUREMAX814MAX815MAX816RESETOutput✔✔✔
RESET Output✔✔
Manual Reset✔✔✔
VCCReset VoltageK, L, N, TK, L, N, TAdjustable
Power-Fail Monitor✔✔✔
Low-Line Detector✔
Watchdog Circuit✔
PART*TEMP RANGEPIN-PACKAGE
MAX814_CPA0°C to +70°C8 PDIP
______________Ordering Information *The MAX814/MAX815 offer a choice of reset threshold voltages.
From the Reset Trip Threshold table, select the suffix corre-
sponding to the desired threshold and insert it into the blank to
complete the part number.
Devices 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.
MAX814/MAX815/MAX816
±1% Accuracy, Low-Power, +3V and +5V
µP Supervisory Circuits
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS, +5V Parts (MAX814/MAX815K, L, N)(VCC= 4.85V to 5.5V for MAX814K/MAX815K, VCC= 4.75V to 5.5V for MAX814L/MAX815L, VCC= 4.60V to 5.5V for MAX814N/
MAX815N, TA= TMINto TMAX, 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.
Terminal Voltage (with respect GND)
VCC....................................................................-0.3V to +6.0V
All Other Pins (Note 1)...........................-0.3V to (VCC+ 0.3V)
Terminal Current (PFI, RESET IN, MR)................................10mA
Terminal Current (all other pins).........................................20mA
Continuous Power Dissipation (TA= +25°C)
Plastic DIP (derate 9.09mW/°C above +70°C)............727mW
SO (derate 5.88mW/°C above +70°C).........................471mW
Operating Temperature Ranges
Commercial.........................................................0°C to +70°C
Extended...........................................................-40°C to +85C
Storage Temperature Range.............................-65°C to +125°C
MAX814K, VCCrising
MAX814_E, VCCfalling
MAX814_C, VCCfalling
MAX814_C, MAX815_C
MAX815 (Note 1)
WDI = VCCor WDI = 0V
MAX814_E, MAX815_E
MAX815, VCC= 5.0V
MAX814_C, MAX815_C
MAX815
MAX815
MAX814
MAX814_E/MAX815_E, VCC= 1.2V, ISINK= 100µA
MAX814_C/MAX815_C, VCC= 1.0V, ISINK= 50µA
MAX814_E, MAX815_E
MAX814K, MAX815K
MAX814L, MAX815L
ISINK= 3.2mA
MAX814N, MAX815N
ISOURCE= 800µA
CONDITIONS4.934873∆VLLLOW LINEto RESETDifferential
Threshold701tWDOMRto WDOHigh Delay-1.01.0IWDIWDI Input Current2.4VWDIWDI Input Threshold0.850tWPWDI Pulse Width1.122.00tWDWatchdog Timeout Period
RESET, WDO, PFO, LOW LINE
Output Voltage0.3
VOL
VCC-1.5VOH1.25.5VCC1.05.5Operating Voltage Range0.4VOLRESET Output VoltageVCC-1.5VOH140200250tRSReset Pulse Width0Reset Threshold Hysteresis85ISUPPLYSupply Current
4.654.75V
VRTReset Threshold
UNITSMINTYPMAXSYMBOLPARAMETERMAX814L, VCCrising4.83VLLT
MAX814N, VCCrising4.68LOW LINEThreshold
ISOURCE= 800µA
ISINK= 3.2mA
Low
High
ISINK= 3.2mA
MAX814/MAX815/MAX816
±1% Accuracy, Low-Power, +3V and +5V
µP Supervisory Circuits
ELECTRICAL CHARACTERISTICS, +5V Parts (MAX814/MAX815K, L, N) (continued)(VCC= 4.85V to 5.5V for MAX814K/MAX815K, VCC= 4.75V to 5.5V for MAX814L/MAX815L, VCC= 4.60V to 5.5V for MAX814N/
MAX815N, TA= TMINto TMAX, unless otherwise noted.)
ELECTRICAL CHARACTERISTICS, +3V Parts (MAX814/MAX815T, MAX816)(VCC= 3.06V to 5.5V for MAX814T/MAX815T and MAX816, TA= TMINto TMAX, unless otherwise noted.)
0°C to +70°C
-40°C to +85°C
0°C to +70°C
MAX815T= -40°C to +85°C, VCC= 1.2V, ISINK= 100µA= 0°C to +70°C, VCC= 1.0V, ISINK= 50µA
MAX816
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
CONDITIONSISOURCE= 500µA1.122.00tWDWatchdog Timeout Period
ISINK= 1.2mA
VOL
0.8 x VCCVOH1.25.5VCC1.05.5Operating Voltage Range
0.3VOL
0.8 x VCCVOH140200250tRSReset Pulse Width-15+6+35IRTRESET IN Input Current85ISUPPLYSupply Current
3.003.08VVRTReset Threshold
UNITSMINTYPMAXSYMBOLPARAMETERMAX816C
MAX816E
1.6781.7001.722VVRITRESET IN Threshold0Reset Threshold Hysteresis
ISOURCE= 800µAV
0.4VOL
RESET Output VoltageVCC-1.5VOH
ISOURCE= 500µA
ISINK= 1.2mAVOL
RESET, WDO, PFO, LOW LINE
Output VoltageV0.4
VCC-1.5VOHISOURCE= 800µA
ISINK= 3.2mAVOL
CONDITIONSInput ThresholdV MRHIHigh0.7 x VCCVto RESETOut DelaytMD(Note 3)250ns
PFI Input ThresholdVPFIVCC= 5.0V2.452.502.55V
PFI Input CurrentIPFI
UNITSMINTYPMAXSYMBOLPARAMETERPull-Up CurrentIMRMR= 0V70240µAPulse WidthtMR150nsMRLOLow1.1
-15.00+6.0+35.00nA
LOW LINE, PFO, WDO
Assertion Delay(Note 2)200µs
VRT(max)
MAX814T, MAX816
4.5V < VCC< 5.5V;
MAX814T, MAX816
VRT(max) < VCC< 3.6V
4.5V < VCC< 5.5V
MAX814/MAX815/MAX816
±1% Accuracy, Low-Power, +3V and +5V
µP Supervisory Circuits
ELECTRICAL CHARACTERISTICS, +3V Parts (MAX814/MAX815T, MAX816) (continued)
(VCC= 3.06V to 5.5V for MAX814T/MAX815T and MAX816, TA= TMINto TMAX, unless otherwise noted.)
VCCrising
VCCfalling, MAX814TE
VCCfalling, MAX814TC
MAX815T (Note 1)
WDI = VCCor 0V, MAX815T
VRT(max) < VCC <
3.6V; MAX815T
MAX815T
Low
CONDITIONS
3.163Input Threshold4873∆VLLLOW LINEto RESETDifferential
Threshold70MRHIHigh1tWDOMRto WDOHigh Delay-1.0+1.0IWDIWDIInput Current0.7 x VCC
0.7 x VCCV
100tWPWDIPulse Width
Highto RESETOut Delay
(Note 3)tMDVRT(max) < VCC < 3.6V750
PFI Input ThresholdVPFIVCC= 3.3V, 5V1.6661.7001.734V
PFI Input CurrentIPFI
UNITSMINTYPMAXSYMBOLPARAMETER
VLLTVPullup CurrentIMRMR= 0V70240µAPulse WidthtMRVRT(max) < VCC < 3.6V500ns
V MRLOLow1.1
-15.00+6.0+35.00nA
LOW LINEThreshold4.5V < VCC < 5.5V
VRT(max) < VCC < 3.6V
VCC= 5.0V; MAX815TLow
VWDIWDIInput Threshold0.8
High
4.5V < VCC < 5.5V150
4.5V < VCC < 5.5V250ns
VRT(max) < VCC< 3.6V
4.5V < VCC < 5.5V
Note 1:Applies if WDOis externally connected to MRor if MRis externally driven.
Note 2:On power-up, delay from reset trip threshold crossing to valid outputs.
Note 3:Applies to both RESETand RESET.
MAX814/MAX815/MAX816
±1% Accuracy, Low-Power, +3V and +5V
µP Supervisory Circuits
VCC SUPPLY CURRENT vs. TEMPERATURE
3V PARTS (MAX814T/MAX815T, MAX816)
MAX814-01
TEMPERATURE (°C)
SUPPLY CURRENT (
VCC = 5.0V
VCC = 3.3V
VCC = 2.5V
VCC SUPPLY CURRENT vs. TEMPERATURE
5V PARTS (MAX814/MAX815K, L, N)
MAX814-02
TEMPERATURE (°C)
SUPPLY CURRENT (
VCC = 5.0V
VCC = 3.3V
RESET TIMEOUT PERIOD
vs. TEMPERATURE
MAX814-03
TEMPERATURE (°C)
RESET TIMEOUT PERIOD (ms)
VCC = 5.0V
VCC = 3.3V
RESET-COMPARATOR PROPAGATION
DELAY vs. TEMPERATURE
MAX814-04
TEMPERATURE (°C)
PROPAGATION DELAY (
100mV OVERDRIVE
(VRT - VCC)
PFI THRESHOLD vs. TEMPERATURE
3V PARTS (MAX814T/MAX815T, MAX816)
1.710MAX814-05
TEMPERATURE (°C)
PFI THRESHOLD (V)
PFI THRESHOLD vs. TEMPERATURE
5V PARTS (MAX814/MAX815K, L, N)
2.540MAX814-06
TEMPERATURE (°C)
PFI THRESHOLD (V)
__________________________________________Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
LOW-LINE COMPARATOR
PROPAGATION DELAY vs. TEMPERATURE
MAX814-11
TEMPERATURE (°C)
PROPAGATION DELAY (
100mV OVERDRIVE
(VLLT - VCC)
LOW-LINE TO RESET THRESHOLD
vs. TEMPERATURE (VCC RISING)MAX814-10
TEMPERATURE (°C)
LOW-LINE TO RESET THRESHOLD (mV)
LOW-LINE TO RESET THRESHOLD
vs. TEMPERATURE (VCC FALLING)MAX814-09
TEMPERATURE (°C)
LOW-LINE TO RESET THRESHOLD (mV)
0206080
