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Home ›  MM79 > MAX814KCPA-MAX814KCSA-MAX814KESA-MAX814LCSA-MAX814LESA-MAX814NCPA-MAX814NCSA-MAX814NESA-MAX814TCPA-MAX814TCSA-MAX814T-CSA-MAX814TESA-MAX815KCSA-MAX815KESA-MAX815LCPA-MAX815LCSA-MAX815LESA-MAX815NCPA-MAX815NCSA-MAX815NESA-MAX815TCSA-MAX815TESA,+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.65V (max) 4.75V, push-pull active-low reset output, manual reset, power-fail monitor, watchdog circuit.
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MAX814KCPAMAXIMN/a50avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.75V (max) 4.85V, push-pull active-low reset output, push-pull active-high reset output, manual reset, power-fail monitor, low-line detector.
MAX814KCSAMAXN/a24avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.75V (max) 4.85V, push-pull active-low reset output, push-pull active-high reset output, manual reset, power-fail monitor, low-line detector.
MAX814KCSAMAXIMN/a84avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.75V (max) 4.85V, push-pull active-low reset output, push-pull active-high reset output, manual reset, power-fail monitor, low-line detector.
MAX814KCSAMAXIM ?N/a100avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.75V (max) 4.85V, push-pull active-low reset output, push-pull active-high reset output, manual reset, power-fail monitor, low-line detector.
MAX814KESAMAXN/a30avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.75V (max) 4.85V, push-pull active-low reset output, push-pull active-high reset output, manual reset, power-fail monitor, low-line detector.
MAX814LCSAMAXIMN/a334avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.65V (max) 4.75V, push-pull active-low reset output, push-pull active-high reset output, manual reset, power-fail monitor, low-line detector.
MAX814LESAN/a126avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.65V (max) 4.75V, push-pull active-low reset output, push-pull active-high reset output, manual reset, power-fail monitor, low-line detector.
MAX814LESAMAXIMN/a216avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.65V (max) 4.75V, push-pull active-low reset output, push-pull active-high reset output, manual reset, power-fail monitor, low-line detector.
MAX814NCPAMAXIM N/a1avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.50V (max) 4.60V, push-pull active-low reset output, push-pull active-high reset output, manual reset, power-fail monitor, low-line detector.
MAX814NCSAMAXIMN/a78avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.50V (max) 4.60V, push-pull active-low reset output, push-pull active-high reset output, manual reset, power-fail monitor, low-line detector.
MAX814NESAMAXIMN/a45avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.50V (max) 4.60V, push-pull active-low reset output, push-pull active-high reset output, manual reset, power-fail monitor, low-line detector.
MAX814TCPAMAXIMN/a10avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 3.00V (max) 3.06V, push-pull active-low reset output, push-pull active-high reset output, manual reset, power-fail monitor, low-line detector.
MAX814TCSAMAXIMN/a42avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 3.00V (max) 3.06V, push-pull active-low reset output, push-pull active-high reset output, manual reset, power-fail monitor, low-line detector.
MAX814TCSAMAXIM ?N/a10avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 3.00V (max) 3.06V, push-pull active-low reset output, push-pull active-high reset output, manual reset, power-fail monitor, low-line detector.
MAX814T-CSA |MAX814TCSAMAXIMN/a465avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 3.00V (max) 3.06V, push-pull active-low reset output, push-pull active-high reset output, manual reset, power-fail monitor, low-line detector.
MAX814TESAMAXIMN/a47avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 3.00V (max) 3.06V, push-pull active-low reset output, push-pull active-high reset output, manual reset, power-fail monitor, low-line detector.
MAX814TESAMAXIM ?N/a80avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 3.00V (max) 3.06V, push-pull active-low reset output, push-pull active-high reset output, manual reset, power-fail monitor, low-line detector.
MAX815KCSAMAXIMN/a23avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.75V (max) 4.85V, push-pull active-low reset output, manual reset, power-fail monitor, watchdog circuit.
MAX815KESAMAXIMN/a71avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.75V (max) 4.85V, push-pull active-low reset output, manual reset, power-fail monitor, watchdog circuit.
MAX815LCPAMAXIM ?N/a10avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.65V (max) 4.75V, push-pull active-low reset output, manual reset, power-fail monitor, watchdog circuit.
MAX815LCPAMAXIMN/a40avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.65V (max) 4.75V, push-pull active-low reset output, manual reset, power-fail monitor, watchdog circuit.
MAX815LCPAMAXN/a50avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.65V (max) 4.75V, push-pull active-low reset output, manual reset, power-fail monitor, watchdog circuit.
MAX815LCSAMAXN/a38avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.65V (max) 4.75V, push-pull active-low reset output, manual reset, power-fail monitor, watchdog circuit.
MAX815LCSAMAXIMN/a25avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.65V (max) 4.75V, push-pull active-low reset output, manual reset, power-fail monitor, watchdog circuit.
MAX815LCSAMAXIM ?N/a44avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.65V (max) 4.75V, push-pull active-low reset output, manual reset, power-fail monitor, watchdog circuit.
MAX815LCSAMAXIM,MAXIMN/a25000avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.65V (max) 4.75V, push-pull active-low reset output, manual reset, power-fail monitor, watchdog circuit.
MAX815LESAMAXIM ?N/a15avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.65V (max) 4.75V, push-pull active-low reset output, manual reset, power-fail monitor, watchdog circuit.
MAX815LESAMAXIMN/a28avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.65V (max) 4.75V, push-pull active-low reset output, manual reset, power-fail monitor, watchdog circuit.
MAX815NCPAMAXN/a23avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.50V (max) 4.60V, push-pull active-low reset output, manual reset, power-fail monitor, watchdog circuit.
MAX815NCSAMAXIMN/a71avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.50V (max) 4.60V, push-pull active-low reset output, manual reset, power-fail monitor, watchdog circuit.
MAX815NESAMaxim N/a33avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.50V (max) 4.60V, push-pull active-low reset output, manual reset, power-fail monitor, watchdog circuit.
MAX815TCSAMAXIMN/a718avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 3.00V (max) 3.06V, push-pull active-low reset output, manual reset, power-fail monitor, watchdog circuit.
MAX815TESAMAXIMN/a30avai+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 3.00V (max) 3.06V, push-pull active-low reset output, manual reset, power-fail monitor, watchdog circuit.


MAX815LCSA ,+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.65V (max) 4.75V, push-pull active-low reset output, manual reset, power-fail monitor, watchdog circuit.ELECTRICAL CHARACTERISTICS, +5V Parts (MAX814/MAX815K, L, N) (continued)(V = 4.85V to 5.5V for MAX8 ..
MAX815LCSA ,+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.65V (max) 4.75V, push-pull active-low reset output, manual reset, power-fail monitor, watchdog circuit.features.' ±2% Power-Fail Comparator_Selector Table' Independent Watchdog with 1.56sec TimeoutFEATU ..
MAX815LCSA ,+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.65V (max) 4.75V, push-pull active-low reset output, manual reset, power-fail monitor, watchdog circuit.FeaturesThe MAX814/MAX815/MAX816 are high-accuracy' ±1% Worst-Case Reset Threshold Accuracymicropro ..
MAX815LCSA ,+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.65V (max) 4.75V, push-pull active-low reset output, manual reset, power-fail monitor, watchdog circuit.General Description ________
MAX815LESA ,+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.65V (max) 4.75V, push-pull active-low reset output, manual reset, power-fail monitor, watchdog circuit.ELECTRICAL CHARACTERISTICS, +5V Parts (MAX814/MAX815K, L, N)(VCC = 4.85V to 5.5V for MAX814K/MAX815 ..
MAX815LESA ,+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.65V (max) 4.75V, push-pull active-low reset output, manual reset, power-fail monitor, watchdog circuit.applications needing high-accuracy reset' ±1% Low-Line Threshold Accuracy (MAX814)thresholds. The R ..
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 ..


MAX814KCPA-MAX814KCSA-MAX814KESA-MAX814LCSA-MAX814LESA-MAX814NCPA-MAX814NCSA-MAX814NESA-MAX814TCPA-MAX814TCSA-MAX814T-CSA-MAX814TESA-MAX815KCSA-MAX815KESA-MAX815LCPA-MAX815LCSA-MAX815LESA-MAX815NCPA-MAX815NCSA-MAX815NESA-MAX815TCSA-MAX815TESA
+-1% accuracy, low-power, microprocessor supervisory circuit. Reset trip threshold (min) 4.75V (max) 4.85V, push-pull active-low reset output, push-pull active-high reset output, manual reset, power-fail monitor, low-line detector.
_______________General Description
The 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
packages. See the Selector Tablebelow for a review of
features.
________________________Applications

Medical 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 Threshold
200ms 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 Circuits
________________________________________________________________Maxim Integrated Products1
__________________________________________________________Pin Configurations
Call toll free 1-800-998-8800 for free samples or literature.

19-0412; Rev 0; 6/95
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
MAX814/MAX815/MAX816
±1% Accuracy, Low-Power, +3V and +5V
µP Supervisory Circuits
_______________________________________________________________________________________3
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.)
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.)
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
_______________________________________________________________________________________5

VCC SUPPLY CURRENT vs. TEMPERATURE
3V PARTS (MAX814T/MAX815T, MAX816)
MAX814-01
TEMPERATURE (°C)
SUPPLY CURRENT (
VCC SUPPLY CURRENT vs. TEMPERATURE
5V PARTS (MAX814/MAX815K, L, N)
MAX814-02
TEMPERATURE (°C)
SUPPLY CURRENT (
RESET TIMEOUT PERIOD
vs. TEMPERATURE
MAX814-03
TEMPERATURE (°C)
RESET TIMEOUT PERIOD (ms)
RESET-COMPARATOR PROPAGATION
DELAY vs. TEMPERATURE
MAX814-04
TEMPERATURE (°C)
PROPAGATION DELAY (
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)
MAX814-06
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 (
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
MAX814/MAX815/MAX816
±1% Accuracy, Low-Power, +3V and +5V
µP Supervisory Circuits_______________________________________________________________________________________

MAXIMUM TRANSIENT DURATION
vs. RESET COMPARATOR OVERDRIVE
3V PARTS (MAX814T/MAX815T, MAX816)
MAX814-12
RESET COMPARATOR OVERDRIVE (mV), VRT - VCC
MAXIMUM TRANSIENT DURATION (
MAXIMUM TRANSIENT DURATION
vs. RESET COMPARATOR OVERDRIVE
5V PARTS (MAX814/MAX815K, L, N)
MAX814-13
RESET COMPARATOR OVERDRIVE (mV), VRT - VCC
MAXIMUM TRANSIENT DURATION (
____________________________Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
RESET THRESHOLD DEVIATION
vs. TEMPERATURE
3V PARTS (MAX814T/MAX815T, MAX816)
MAX814-07
TEMPERATURE (°C)
RESET THRESHOLD DEVIATION (mV)
RESET THRESHOLD DEVIATION
vs. TEMPERATURE
5V PARTS (MAX814/MAX815K, L, N)
MAX814-08
TEMPERATURE (°C)
RESET THRESHOLD DEVIATION (mV)
0206080
MAX814/MAX815/MAX816
±1% Accuracy, Low-Power, +3V and +5V
µP Supervisory Circuits
_______________________________________________________________________________________7
_______________Detailed Description

The MAX814/MAX815/MAX816 are high-accuracy, low-
power microprocessor (µP) supervisory circuits. They
have µP-reset, watchdog-timer, and power-fail func-
tions. Typical applications illustrating their similarities
and differences are shown in Figures 1, 2, and 3.
Figures 4, 5, and 6 show the block diagrams of these
parts.
______________________________________________________________Pin Description

*Reset Threshold Voltage is determined by part number suffix: K = 4.80V, L = 4.70V, N = 4.55V, T = 3.03V.
MAX814/MAX815/MAX816
±1% Accuracy, Low-Power, +3V and +5V
µP Supervisory Circuits_______________________________________________________________________________________

Figure 1a. Typical Application for Dual +3.3V and +5V SystemsFigure 1b. MAX814 Typical Application
Figure 2. MAX815 Typical ApplicationFigure 3. MAX816 Typical Application
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