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MAX8215CPD+MAXIMN/a955avai±5V, ±12V (±15V) Dedicated Microprocessor Voltage Monitors
MAX8215CSD+ |MAX8215CSDMAXIMN/a30avai±5V, ±12V (±15V) Dedicated Microprocessor Voltage Monitors
MAX8215ESD+ |MAX8215ESDMAXN/a33avai±5V, ±12V (±15V) Dedicated Microprocessor Voltage Monitors
MAX8215ESD+ |MAX8215ESDMAXIMN/a15avai±5V, ±12V (±15V) Dedicated Microprocessor Voltage Monitors
MAX8216CSD+ |MAX8216CSDMAXIMN/a50avai±5V, ±12V (±15V) Dedicated Microprocessor Voltage Monitors
MAX8216EPD+MAXIMN/a1500avai±5V, ±12V (±15V) Dedicated Microprocessor Voltage Monitors
MAX8216ESD+ |MAX8216ESDMAXIMN/a12avai±5V, ±12V (±15V) Dedicated Microprocessor Voltage Monitors
MAX8216ESD+N/AN/a2500avai±5V, ±12V (±15V) Dedicated Microprocessor Voltage Monitors


MAX8216ESD+ ,±5V, ±12V (±15V) Dedicated Microprocessor Voltage MonitorsFeatures♦ 4 Dedicated Comparators plus 1 AuxiliaryThe MAX8215 contains five voltage comparators; fo ..
MAX8216ESD+ ,±5V, ±12V (±15V) Dedicated Microprocessor Voltage MonitorsGeneral Description ________
MAX8216MJD ,5V / 12V (15V) Dedicated Microprocessor Voltage MonitorsApplications' Wide Supply Range: 2.7V to 11VMicroprocessor Voltage Monitor' Built-In Hysteresis+5V, ..
MAX821LUS+T ,4-Pin, µP Voltage Monitors with Pin-Selectable Power-On Reset Timeout DelayApplicationsMAX822LUS-T4.63 BF_ _Bar-Code ScannersMAX822MUS-T 4.38 BG_ _ComputersMAX822TUS-T 3.08 B ..
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MAX821MUS+T ,4-Pin, µP Voltage Monitors with Pin-Selectable Power-On Reset Timeout DelayApplicationsMAX822LUS-T4.63 BF_ _Bar-Code ScannersMAX822MUS-T 4.38 BG_ _ComputersMAX822TUS-T 3.08 B ..
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 ..
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MB8264A-10 , MOS 65536-BIT DYNAMIC RANDOM ACCESS MEMORY


MAX8215CPD+-MAX8215CSD+-MAX8215ESD+-MAX8216CSD+-MAX8216EPD+-MAX8216ESD+
±5V, ±12V (±15V) Dedicated Microprocessor Voltage Monitors
_______________General Description
The MAX8215 contains five voltage comparators; four
are for monitoring +5V, -5V, +12V, and -12V, and the
fifth monitors any desired voltage. The MAX8216 is
identical, except it monitors ±15V supplies instead of
±12V. The resistors required to monitor these voltages
and provide comparator hysteresis are included on-
chip. All comparators have open-drain outputs. These
devices consume 250µA max supply current over tem-
perature.
________________________Applications

Microprocessor Voltage Monitor
+5V, -5V, +12V, -12V Supply Monitoring (MAX8215)
+5V, -5V, +15V, -15V Supply Monitoring (MAX8216)
Overvoltage/Undervoltage Detection with
Uncommitted Comparator
Industrial Controllers
Mobile Radios
Portable Instruments
Industrial Equipment
Data-Acquisition Systems
____________________________Features
4 Dedicated Comparators plus 1 Auxiliary
Comparator
5V Dedicated Comparator Has ±1.25% Accuracy-5V, +12V, -12V, +15V, -15V Dedicated
Comparators Have ±1.5% Accuracy
Overvoltage/Undervoltage Detection or
Programmable Delay Using Auxiliary Comparator
Internal 1.24V Reference with ±1% Initial AccuracyWide Supply Range: 2.7V to 11VBuilt-In Hysteresis250µA Max Supply Current Over Temp.Independent Open-Drain OutputsAll Precision Components Included
______________Ordering Information

*Dice are tested at TA = +25°C.
Devices in PDIP and SO packages 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. Lead free
not available for CERDIP package.
MAX8215/MAX8216
±5V, ±12V (±15V) Dedicated
Microprocessor Voltage Monitors

VDD
OUT1
OUT2
OUT3-5V
+5V
GND
VREF
DIP/SO

TOP VIEW
MAX8215
MAX8216
OUT4
DOUT
PGNDDIN
-12V (-15V)
+12V (+15V)
( ) ARE FOR MAX8216 ONLY.
__________________Pin Configuration

+5V
OUT1
+5V
VDDPGNDGND
0.1μF
-5V
OUT2
OUT3
+12V (+15V)
OUT4
-12V (-15V)
DOUTDIN
1.24V REFERENCEVREF( ) ARE FOR
MAX8216 ONLY.
MAX8215
MAX8216
__________Typical Operating Circuit

19-0169; Rev 1; 11/05
PARTTEMP RANGEPIN-PACKAGE
MAX8215CPD
0°C to +70°C14 Plastic DIP
MAX8215CSD0°C to +70°C14 SO
MAX8215C/D0°C to +70°CDice*
MAX8215EPD-40°C to +85°C14 Plastic DIP
MAX8215ESD-40°C to +85°C14 SO
MAX8215EJD-40°C to +85°C14 CERDIP
MAX8215MPD-55°C to +125°C14 Plastic DIP
14 CERDIP-55°C to +125°CMAX8215MJD
Ordering Information continued on last page.
MAX8215/MAX8216
±5V, ±12V (±15V) Dedicated
Microprocessor Voltage Monitors
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS

(VDD= +5V, GND = 0V, 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.
PARAMETERMINTYPMAXUNITS

Load Current40µA
IDDSupply Current137250µA
Load Regulation3.3µV/µA
Line Regulation0.01%/V
Output Tempco15ppm/°C
2.711VDDSupply Voltage Range2.8511V
CONDITIONS= TMINto TMAX
VDD............................................................................-0.3V, +12V
VREF..............................................................-0.3V, (VDD+ 0.3V)
OUT_, DOUT Outputs....................................-0.3V, (VDD+ 0.3V)
+5V Input...................................................................+20V, -0.3V
-5V, +12V, +15V, -12V, -15V Inputs.....................................±50V
DIN Input.......................................................(VDD+ 0.3V), -0.3V
Continuous Power Dissipation (TA= +70°C)
Plastic DIP (derate 10.00mW/°C above +70°C)...........800mW
SO (derate 8.33mW/°C above +70°C)..........................667mW
CERDIP (derate 9.09mW/°C above +70°C)..................727mW
Operating Temperature Ranges:
MAX821_C_ _......................................................0°C to +70°C
MAX821_E_ _....................................................-40°C to +85°C
MAX821_M_ _.................................................-55°C to +125°C
Storage Temperature Range.............................-65°C to +165°C
Lead Temperature (soldering, 10sec).............................+300°C
MAX821_C
MAX821_E
MAX821_M
MAX821_E/M
VINdecreasing, TA= +25°C
MAX821_C
MAX821_E
MAX821_M
VINincreasing= +25°C= +125°C1.75
0.8= -55°C
VINdecreasing (MAX8215 only), TA= +25°C
MAX821_C
MAX821_E10.37810.802
10.32510.855MAX821_MTA= TMINto TMAX+12V Trip Level+5V Trip Level Hysteresis
Output Voltage Tolerance
Referred to 1.24V%-1.51.5= +25°C
MAX821_C= TMINto TMAX
+5V Trip Level
VINdecreasing (MAX8216 only), TA= +25°C
MAX821_C
MAX821_E12.97013.500
12.90413.566MAX821_MTA= TMINto TMAX+15V Trip Level
POWER SUPPLY
REFERENCE OUTPUT
COMPARATOR INPUTS
MAX8215/MAX8216
±5V, ±12V (±15V) Dedicated
Microprocessor Voltage Monitors
ELECTRICAL CHARACTERISTICS (continued)

(VDD= +5V, GND = 0V, TA= TMINto TMAX, unless otherwise noted.)
PARAMETERMINTYPMAXUNITS

MAX821_C
MAX821_E-10.378-10.802
Threshold Hysteresis
MAX821_M
CONDITIONS= TMINto TMAX
+15V trip level
-5V trip level
-12V Trip LevelV
I VIN I decreasing, TA= +25°C
-13.003-13.467-15V Trip Level
I VIN I decreasing (MAX8216 only), TA= +25°CMAX821_C
MAX821_E-12.970-13.500
-12.904-13.566MAX821_M= TMINto TMAX
-4.337-4.493-5V Trip Level
I VIN I decreasing, TA= +25°CMAX821_C
MAX821_E-4.326-4.500
-4.304-4.525MAX821_M= TMINto TMAX
160Input Resistance
190TA= +25°C
-1.501.5VINdecreasing, TA= +25°C
+5V input to GND
-5V input to REF
-12V/-15V input to REF
Trip Level with Respect to 1.24V
Threshold Hysteresis1.252.00%TA= +25°C
Input Bias Current210nATA= +25°C
MAX821_C
MAX821_E
MAX821_M
+12V/+15V input to GND
1.252.00+12V trip level
1.502.25-12V trip level
1.502.25-15V trip level
Hysteresis Tempco, ±15, ±12, -5%/°C0.005= +25°C
VOL; VDD = 5V, ISINK= 2mA0.110.3
VDD = 1.5V, ISINK= 0.2mA0.040.3Voltage Output Low
VDD = 1.0V, ISINK= 0.1mA0.10
Leakage CurrentOff State1.0µA
Comparator Response Time
(All Comparators)30mV overdrive (Note 1)20µs
Note 1: To overdrive the +5V/+12V/+15V comparators with a 30mV overdrive voltage, use the formula 30mV

to determine the required input voltage. VTHR is the threshold of the particular overdriven comparator. To overdrive the
-5V/-12V/-15V comparators use 30mV .
VTHR
1.24)VTHR
1.24I[1+ ]
AUXILIARY COMPARATOR INPUT
MAX8215/MAX8216
±5V, ±12V (±15V) Dedicated
Microprocessor Voltage Monitors
__________________________________________Typical Operating Characteristics

(TA=+25°C, unless otherwise noted.)
COMPARATOR INPUT BIAS CURRENT
vs. TEMPERATURE
MAX8215-TOC1
TEMPERATURE (C°)
INPUT BIAS CURRENT (nA)
VDD = 5V
COMPARATOR INPUT BIAS CURRENT
vs. SUPPLY VOLTAGE

MAX8215-TOC2
SUPPLY VOLTAGE (V)
INPUT BIAS CUREENT (nA)
TA = +25°C
OUTPUT VOLTAGE LOW
vs. OUTPUT SINK CURRENT

MAX8215-TOC3
VOL (V)
OUTPUT SINK CURRENT (mA)
TA = +25°C
TA = +125°C
TA = -55°C
SUPPLY CURRENT
vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)57891011
MAX8215-TOC4
TA = +125°C
TA = +25°C
TA = -55°C
-5V PIN = -5V
-12V PIN = -5V
+5V PIN = +5V
+12V PIN = +12V1.23
REFERENCE VOLTAGE
vs. REFERENCE SOURCE CURRENT

MAX8215-TOC5
REFERENCE SOURCE CURRENT (µA)
VREF,REFERENCE VOLTAGE (V)1.231
TA = +125°C
TA = -55°C
TA = +25°C
VDD = 5V
REFERENCE VOLTAGE
vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)
VREF, REFERENCE VOLTAGE (V)45678910
MAX8215-TOC6TA = -55°C
NOTE: -55°C IS WORST CASE
CONDITION FOR REFERENCE
REGULATION AT LOW VOLTAGES.
VREF OUTPUT VOLTAGE
vs. TEMPERATURE
TEMPERATURE (°C)
VREF, REFERENCE VOLTAGE (V)
MAX8215-TOC7
VDD = 5V
MAX8215/MAX8216
±5V, ±12V (±15V) Dedicated
Microprocessor Voltage Monitors
+5V RESPONSE WITH
±100mV INPUT EXCURSION AROUND TRIP LEVEL

8215/16 SCOPE1
+5V COMP
+5V PIN
OUT1
_____________________________Typical Operating Characteristics (continued)

(TA= +25°C, unless otherwise noted.)
-5V RESPONSE WITH
±100mV INPUT EXCURSION AROUND TRIP LEVEL

8215/16 SCOPE2
-5V COMP
+5V PIN
OUT1
DOUT OUTPUT VOLTAGE vs. SUPPLY VOLTAGE
R1 = 15kΩ, R2 = 40k (see Figure 4)

8215/16 SCOPE3
SUPPLY
VOLTAGE
DOUT
OUTPUT
VOLTAGE
DIN COMPARATOR RESPONSE
WITH 30mV OVERDRIVE

8215/16 SCOPE4
COMP
OUTPUT
COMP
INPUT
DIN COMPARATOR RESPONSE
WITH 50mV OVERDRIVE

8215/16 SCOPE5
COMP
OUTPUT
COMP
INPUT
DIN COMPARATOR RESPONSE
WITH 100mV OVERDRIVE

8215/16 SCOPE6COMP
OUTPUT
COMP
INPUT
MAX8215/MAX8216
±5V, ±12V (±15V) Dedicated
Microprocessor Voltage Monitors
_______________Detailed Description

The MAX8215/MAX8216 contain 5 comparators (Figure
1). The comparator with its output labeled DOUT is dis-
tinguished from the others in that it can be set up to mon-
itor various voltages; each of the other 4 comparators
monitors a specific voltage. The DOUT comparator’s
noninverting input is available external to the device; its
inverting input is tied internally to the reference.
The MAX8215/MAX8216 comparators have open-drain
outputs. Thus, these devices require pull-up resistors
for proper operation. See the Typical Operating Circuit.
Open-drain outputs are useful for driving LEDs and for
situations in which the comparator outputs must be
connected together (i.e., wire-ORed).
Bypass VDDwith 0.1µF connected to PGND.
__________Applications Information
Hysteresis

When the voltage on a typical comparator’s input is
at or near the voltage on the other input, ambient
noise generally causes the comparator output to
oscillate. The most common way to eliminate this
problem is by using hysteresis. When the two com-
parator input voltages are equal, hysteresis causes
one comparator input voltage to move quickly past
the other, thus taking the input out of the region
where oscillation occurs. Standard comparators
need external resistors for hysteresis; these resistors
are not necessary when using any of the MAX8215
and MAX8216 comparators because hysteresis is
built in.
NAMEFUNCTION
VREFOutput of the internal 1.24V referenceGNDGround. Connect to PGND.+5VInput for monitoring +5V supply
PIN
-5VInput for monitoring -5V supply+12V
(+15V)
MAX8215 input for monitoring +12V
(MAX8216 input for monitoring +15V)-12V
(-15V)
MAX8215 input for monitoring -12V
(MAX8216 input for monitoring -15V)DIN
Noninverting input of the auxiliary
comparator. Its inverting input is tied
to the internal reference.PGNDDOUTOutput of the auxiliary comparator
_____________________Pin Description

Power-supply ground. Bypass VDD
to this pin.
Outputs of the four dedicated com-
paratorsVDD
10, 11,
12, 13
OUT4,
OUT3,
OUT2,
OUT1
Power-supply positive voltage input.
Bypass to PGND.
+5V
OUT1
-5V
OUT2
OUT3
+12V (+15V)
OUT4
-12V (-15V)
DOUTDIN
1.24V REFERENCEVREF
( ) ARE FOR
MAX8216 ONLY.
MAX8215
MAX8216
VDD
PGND
GND
Figure 1. Block Diagram
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