MAX700ESA+ [MAXIM]
Power Supply Support Circuit, Adjustable, 1 Channel, CMOS, PDSO8, LEAD FREE, SOP-8;
| 型号： | MAX700ESA+ |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Power Supply Support Circuit, Adjustable, 1 Channel, CMOS, PDSO8, LEAD FREE, SOP-8 输入元件 光电二极管 |
| 文件： | 总6页 (文件大小：296K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MAX700/MAX701/MAX702
Power-Supply Monitor with Reset
General Description
Features
● Min 200ms RESET Pulse on Power-Up, Power-
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
Down, and During Low-Voltage Conditions
● Reset Threshold Factory Trimmed for +5V Systems
● No External Components or Adjustments with
+5V-Powered Circuits
the correct state for V
voltages down to +1V (Figure 4).
CC
They provide excellent circuit reliability and low cost by
eliminating external components and adjustments when
used with +5V-powered circuits.
● Debounced Manual-Reset Input
● Preset or Adjustable-Voltage Detection (MAX700)
● Adjustable Hysteresis (MAX700)
The MAX702 is the simplest part in the family. When
● 8-Pin PDIP and Narrow-SO Packages
V
CC
falls to 4.65V, RESET goes low. The MAX702 also
Ordering Information
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.
PART*
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
Dice
MAX700C/D
MAX700CPA
MAX700CSA
MAX700EPA
MAX700ESA
MAX701C/D
MAX701CPA
MAX701CSA
MAX701EPA
MAX701ESA
MAX702C/D
MAX702CPA
MAX702CSA
MAX702EPA
MAX702ESA
8 PDIP
8 Narrow SO
8 PDIP
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.
8 Narrow SO
Dice
8 PDIP
8 Narrow SO
8 PDIP
8 Narrow SO
Dice
Applications
● Computers
● Controllers
● Intelligent Instruments
● Critical µP Power Monitoring
8 PDIP
8 Narrow SO
8 PDIP
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.
Pin Configurations
TOP VIEW
MR
SENSE
HYST
GND
1
2
3
4
8
7
6
5
V
MR
N.C.
N.C.
GND
1
2
3
4
8
7
6
5
V
MR
1
2
3
4
8
7
6
5
N.C.
CC
CC
CTL
N.C.
V
RESET
N.C.
CC
GND
N.C.
MAX700
DIP/SO
MAX701
DIP/SO
MAX702
DIP/SO
RESET
RESET
RESET
RESET
N.C.
19-2690; Rev 3; 5/14
MAX700/MAX701/MAX702
Power-Supply Monitor with Reset
Absolute Maximum Ratings
V
.....................................................................-0.3V to +15.5V
Rate of Rise, V
..........................................................100V/µs
CC
CC
Voltage (with respect to GND) at RESET, RESET,
HYST, CTL, SENSE ........................................... -0.3V to V
Operating Temperature Range
Power Dissipation, Any Package ....................................380mW
Storage Temperature Range............................ -55°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
CC
C Suffix...............................................................0°C to +70°C
E Suffix ........................................................... -40°C to +85°C
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.
Electrical Characteristics
(V
= +5V, CTL = GND on MAX700, T = +25°C, unless otherwise noted.)
CC
A
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Monitor Voltage Range
CC
T
T
= T
= T
to T
to T
, CTL = V
3
15
V
A
A
MIN
MIN
MAX
CC
(MAX700 Only)
Min V for Valid Reset Output,
Declining Supply
CC
, V
≤ 0.4V when sinking 1mA
1.5
1
V
MAX RESET
Supply Current
100
4.65
4.62
30
200
4.75
4.75
µA
Power-up
4.50
4.50
Reset Threshold
T
= T
to T
V
A
MIN
MAX
Power-down
Internal Hysteresis
HYST not connected
mV
ms
ns
Reset Output Pulse Width
RESET Fall Time
200
100
350
200
10
500
1
MAX700/MAX701 only, C
= 100pF
LOAD
No reset
Reset
V
Pulse Duration
CC
5V to 4V V
pulse
µs
CC
Guaranteeing
10
MR Input Threshold
MR Pullup Current
MAX700
0.7
-5
V
-30
µA
I
I
I
I
I
I
I
I
I
I
= 3.2mA, V
= 1.6mA, V
= 5V
= 3V
0.4
0.4
SINK
CC
RESET Output Low
V
V
SINK
CC
= 3.2mA, V
= 1.6mA, V
= 0.5mA, V
= 4.25V
V
- 0.4
SOURCE
SOURCE
SOURCE
CC
CC
CC
CC
CC
CC
RESET Output High
= 3V
V
V
- 0.4
- 0.4
= 1.5V
= 16mA, V
= 4.25V
= 3V
0.4
0.4
0.4
SINK
CC
RESET Output Low
RESET Output High
= 1.6mA, V
V
V
SINK
CC
CC
= 0.4mA, V
= 1.5V
SINK
= 3.2mA, V
= 5V
= 3V
V
V
- 0.4
- 0.4
SOURCE
SOURCE
CC
CC
CC
= 1.6mA, V
CC
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MAX700/MAX701/MAX702
Power-Supply Monitor with Reset
Electrical Characteristics (continued)
(V
= +5V, CTL = GND on MAX700, T = +25°C, unless otherwise noted.)
CC
A
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
MAX701
RESET Output Low
I
I
I
I
I
I
I
I
= 16mA, V
= 5V
0.4
V
V
SINK
CC
= 3.2mA, V
= 1.6mA, V
= 0.5mA, V
= 4.25V
= 3V
V
V
V
- 0.4
SOURCE
SOURCE
SOURCE
CC
CC
CC
CC
CC
CC
RESET Output High
- 0.4
- 0.4
= 1.5V
= 3.2mA, V
= 4.25V
= 3V
0.4
0.4
0.4
SINK
CC
RESET Output Low
= 1.6mA, V
V
V
SINK
CC
= 0.4mA, V
= 1.5V
SINK
CC
RESET Output High
= 3.2mA, V
= 5V
CC
V
- 0.4
SOURCE
CC
MAX702
I
I
I
I
= 3.2mA, V
= 4.25V
= 3V
0.4
0.4
0.4
SINK
CC
RESET Output Low
RESET Output High
= 1.6mA, V
V
V
SINK
CC
= 0.4mA, V
= 1.5V
SINK
CC
= 3.2mA, V
= 5V
V
- 0.4
SOURCE
CC
CC
MAX700 ONLY (CTL = V , unless otherwise noted)
CC
SENSE Input Threshold
SENSE Input Current
HYST Input On-Resistance
CTL Input Threshold
T
= T
to T
MAX
1.25
1.29
0.1
0.5
2
1.35
100
V
A
MIN
nA
kΩ
V
CTL Pulldown Current
30
µA
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MAX700/MAX701/MAX702
Power-Supply Monitor with Reset
Pin Description
PIN
NAME
FUNCTION
MAX700 MAX701 MAX702
Input for Manual Pushbutton Reset. Has internal 5µA pullup. Low input activates the
RESET/RESET outputs.
1
1
1
MR
The voltage-sense input when CTL = V . Its threshold is 1.29V. SENSE always
CC
2
—
—
SENSE remains connected to the internal comparator. So, when V
is being monitored
CC
internally (CTL = GND), SENSE should be left open circuit.
Normally NOT used when voltage is monitored through V
(CTL = GND). When
CC
monitoring through SENSE (CTL = V ), HYST allows hysteresis to be added,
reducing noise and spurious reset activity (Figure 3). HYST turns on 5µs before the
RESET/RESET outputs are activated, and its on-resistance to GND is typically 1kΩ.
CC
3
—
—
HYST
GND
4
5
6
4
6
5
3
7
Ground
Goes low when V
when SENSE falls below 1.29V.
falls below 4.65V, or when CTL = V
on the MAX700 goes low
CC
CC
RESET
—
RESET
Inverted Version of RESET
When CTL = GND, V
is monitored by the reset circuit. When CTL = V , V
CC CC
CC
7
—
—
CTL
is ignored and SENSE is monitored, allowing the threshold to be set with external
resistors.
8
8
2
V
Chip Power and +5V Sensing Input (When CTL = GND on MAX700)
No Connection
CC
—
2, 3, 7
4, 5, 6, 8
N.C.
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MAX700/MAX701/MAX702
Power-Supply Monitor with Reset
1M
MR
1
V
8
7
CC
MANUAL
RESET
BUTTON
CTL
MAX700
COMPARATOR
1
8
MR
+5V
V
CC
SENSE
2
150k
2
3
4
7
6
5
SENSE
HYST
GND
N.C.
CTL
RESET
RESET
MAX700
1.29VREF
N.C.
R
RC
RESET
6
5
R OSC
TO µP
HYST
GND
3
4
RESET
Figure 1. MAX700 Block Diagram
Figure 2. MAX700 Typical Connection Diagram
MANUAL
RESET
BUTTON
MAX700
1
2
8
7
MR
V
3V TO 15V
V
IN
CC
2V/div
RESET
R1
SENSE
V
CTL
IN
R2
R3
0V
0V
3
4
6
5
HYST
GND
RESET
N.C.
TO µP
RESET
2V/div
V
CC
V
L
R1 = R2
- 1
V
V
= LOWER VOLTAGE THRESHOLD
= UPPER VOLTAGE THRESHOLD
L
(1.29 )
V R1
T
R3 =
U
1s/div
V
- V
L
U
HYSTERESIS = V - V
U
L
Figure 3. MAX700 Connected for External Senses and
Hysteresis
Figure 4. Typical MAX700/MAX701/MAX702 RESET Output vs.
V
CC
Figure 4 shows the RESET output of the MAX700/
Package Information
MAX701/MAX702 in the correct state for V
voltages
CC
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.
down to 0V. Note the effect of the built-in hysteresis on
the trigger lever of RESET.
PACKAGE
TYPE
PACKAGE OUTLINE
LAND
PATTERN NO.
CODE
P8+2
S8+4
NO.
8 PDIP
21-0143
21-0041
—
8 Narrow SO
90-0096
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MAX700/MAX701/MAX702
Power-Supply Monitor with Reset
Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
0
1
2
3
3/90
Initial release
—
11/05
12/07
5/14
Added lead-free information to the Ordering Information table.
Updated Pin Description table.
1
4
1
No /V OPNs; removed automotive reference from Applications section
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
©
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
2014 Maxim Integrated Products, Inc.
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