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PDF MAX700 Data sheet ( Hoja de datos )
| Número de pieza | MAX700 | |
| Descripción | Power-Supply Monitor with Reset | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX700 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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MAX700/MAX701/MAX702
Power-Supply Monitor with Reset
General Description
The MAX700/MAX701/MAX702 are supervisory circuits
used to monitor the power supplies in microprocessor
(µP) and digital systems. The RESET/RESET outputs of
the MAX700/MAX701/MAX702 are guaranteed to be in
the correct state for VCC voltages down to +1V (Figure 4).
They provide excellent circuit reliability and low cost by
eliminating external components and adjustments when
used with +5V-powered circuits.
The MAX702 is the simplest part in the family. When
VCC falls to 4.65V, RESET goes low. The MAX702 also
provides a debounced manual-reset input. The MAX701
performs the same functions but has both RESET and
RESET outputs. Their primary function is to provide a
system reset. Accordingly, an active reset signal is
supplied for low supply voltages and for at least 200ms
after the supply voltage reaches its operating value.
In addition to the features of the MAX701 and MAX702,
the MAX700 provides preset or adjustable-voltage
detection so thresholds other than 4.65V can be select-
ed, and adjustable hysteresis. All parts are supplied in
8-pin PDIP and narrow-SO packages in commercial and
extended temperature ranges.
Applications
●● Computers
●● Controllers
●● Intelligent Instruments
●● Critical µP Power Monitoring
Pin Configurations
Features
●● Min 200ms RESET Pulse on Power-Up, Power-
Down, and During Low-Voltage Conditions
●● Reset Threshold Factory Trimmed for +5V Systems
●● No External Components or Adjustments with
+5V-Powered Circuits
●● Debounced Manual-Reset Input
●● Preset or Adjustable-Voltage Detection (MAX700)
●● Adjustable Hysteresis (MAX700)
●● 8-Pin PDIP and Narrow-SO Packages
Ordering Information
PART*
MAX700C/D
TEMP RANGE
0°C to +70°C
PIN-PACKAGE
Dice
MAX700CPA
0°C to +70°C
8 PDIP
MAX700CSA
0°C to +70°C
8 Narrow SO
MAX700EPA
-40°C to +85°C
8 PDIP
MAX700ESA
-40°C to +85°C
8 Narrow SO
MAX701C/D
0°C to +70°C
Dice
MAX701CPA
0°C to +70°C
8 PDIP
MAX701CSA
0°C to +70°C
8 Narrow SO
MAX701EPA
-40°C to +85°C
8 PDIP
MAX701ESA
-40°C to +85°C
8 Narrow SO
MAX702C/D
0°C to +70°C
Dice
MAX702CPA
0°C to +70°C
8 PDIP
MAX702CSA
0°C to +70°C
8 Narrow SO
MAX702EPA
-40°C to +85°C
8 PDIP
MAX702ESA
-40°C to +85°C
8 Narrow SO
*Devices in PDIP and SO packages are available in both lead-
ed and lead(Pb)-free packaging. Specify lead free by adding
the + symbol at the end of the part number when ordering.
TOP VIEW
MR 1
SENSE 2
HYST 3
GND 4
MAX700
8 VCC
7 CTL
6 RESET
5 RESET
MR 1
N.C. 2
N.C. 3
GND 4
MAX701
8 VCC
7 N.C.
6 RESET
5 RESET
MR 1
VCC 2
GND 3
N.C. 4
MAX702
8 N.C.
7 RESET
6 N.C.
5 N.C.
DIP/SO
DIP/SO
DIP/SO
19-2690; Rev 3; 5/14
1 page  
MAX700/MAX701/MAX702
Power-Supply Monitor with Reset
MR 1
1M
8 VCC
SENSE 2
COMPARATOR
1.29VREF
HYST 3
GND 4
7 CTL
150k
MAX700
R RC
R OSC
6 RESET
5 RESET
Figure 1. MAX700 Block Diagram
MANUAL
RESET
BUTTON
MAX700
1 MR
8
VCC
2
N.C. SENSE
3
HYST
7
CTL
6
RESET
4
GND
5
RESET
+5V
N.C.
TO µP
Figure 2. MAX700 Typical Connection Diagram
R1
VIN
MANUAL
RESET
BUTTON
1
MAX700
MR VCC
8
2
SENSE
7
CTL
VIN 3V TO 15V
R2 R3
3
HYST
4
GND
6
RESET
5
RESET
N.C.
TO µP
( )R1 = R2
VL
1.29
-1
VL = LOWER VOLTAGE THRESHOLD
R3 =
VTR1
VU - VL
VU = UPPER VOLTAGE THRESHOLD
HYSTERESIS = VU - VL
Figure 3. MAX700 Connected for External Senses and
Hysteresis
Figure 4 shows the RESET output of the MAX700/
MAX701/MAX702 in the correct state for VCC voltages
down to 0V. Note the effect of the built-in hysteresis on
the trigger lever of RESET.
RESET
2V/div
0V
VCC 2V/div
1s/div
0V
Figure 4. Typical MAX700/MAX701/MAX702 RESET Output vs.
VCC
Package Information
For the latest package outline information and land patterns
(footprints), go to www.maximintegrated.com/packages. Note
that a “+”, “#”, or “-” in the package code indicates RoHS status
only. Package drawings may show a different suffix character, but
the drawing pertains to the package regardless of RoHS status.
PACKAGE
TYPE
8 PDIP
8 Narrow SO
PACKAGE
CODE
P8+2
S8+4
OUTLINE
NO.
21-0143
21-0041
LAND
PATTERN NO.
—
90-0096
www.maximintegrated.com
Maxim Integrated │ 5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet MAX700.PDF ] | |
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