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MAX702CSA+

P1-P3P4-P6
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 V
CC
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
V
CC
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 operat-
ing 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
Automotive Systems
Critical µP Power Monitoring
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
MAX700/MAX701/MAX702
Power-Supply Monitor with Reset
________________________________________________________________
Maxim Integrated Products
1
19-2690; Rev 2; 12/07
For pricing delivery, and ordering information please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
RESET
RESETGND
1
2
8
7
V
CC
CTLSENSE
HYST
MR
DIP/SO
TOP VIEW
3
4
6
5
MAX700
RESET
RESET
GND
1
2
8
7
V
CC
N.C.N.C.
N.C.
MR
DIP/SO
3
4
6
5
MAX701
N.C.
N.C.
RESET
GND
1
2
8
7
N.C.
V
CC
N.C.
MR
DIP/SO
3
4
6
5
MAX702
Pin Configurations
Ordering Information
PART* TEMP RANGE PIN-PACKAGE
MAX700C/D 0°C to +70°C 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-free packaging. Specify lead free by adding the +
symbol at the end of the part number when ordering.
MAX700/MAX701/MAX702
Power-Supply Monitor with Reset
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.
V
CC
......................................................................-0.3V to +15.5V
Voltage (with respect to GND) at RESET, RESET,
HYST, CTL, SENSE ............................................-0.3V to V
CC
Operating Temperature Range
C Suffix .............................................................0°C to +70°C
E Suffix...........................................................-40°C to +85°C
Rate of Rise, V
CC
............................................................100V/µs
Power Dissipation, Any Package .....................................380mW
Storage Temperature Range .............................-55°C to +150°C
Lead Temperature (soldering, 10s)..................................+300°C
ELECTRICAL CHARACTERISTICS
(V
CC
= +5V, CTL = GND on MAX700, T
A
= +25°C, unless otherwise noted.)
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Monitor Voltage Range
(MAX700 Only)
T
A
= T
MIN
to T
MAX
, CTL = V
CC
315V
Min V
CC
for Valid Reset Output,
Declining Supply
T
A
= T
MIN
to T
MAX
, RESET ≤ 0.4V when sinking 1mA 1.5 1 V
Supply Current 100 200 µA
Power-up 4.50 4.65 4.75
Reset Threshold T
A
= T
MIN
to T
MAX
Power-down 4.50 4.62 4.75
V
Internal Hysteresis HYST not connected 30 mV
Reset Output Pulse Width 200 350 500 ms
RESET Fall Time MAX700/MAX701 only, C
LOAD
= 100pF 200 ns
No reset 10 1
V
CC
Pulse Duration Guaranteeing 5V to 4V V
CC
pulse
Reset 100 10
µs
MR Input Threshold 0.7 V
MR Pullup Current -5 -30 µA
MAX700
I
SINK
= 3.2mA, V
CC
= 5V 0.4
RESET Output Low
I
SINK
= 1.6mA, V
CC
= 3V 0.4
V
I
SOURCE
= 3.2mA, V
CC
= 4.25V
V
CC
-
0.4
I
SOURCE
= 1.6mA, V
CC
= 3V
V
CC
-
0.4
RESET Output High
I
SOURCE
= 0.5mA, V
CC
= 1.5V
V
CC
-
0.4
V
I
SINK
= 16mA, V
CC
= 4.25V 0.4
I
SINK
= 1.6mA, V
CC
= 3V 0.4RESET Output Low
I
SINK
= 0.4mA, V
CC
= 1.5V 0.4
V
I
SOURCE
= 3.2mA, V
CC
= 5V
V
CC
-
0.4
RESET Output High
I
SOURCE
= 1.6mA, V
CC
= 3V
V
CC
-
0.4
V
MAX700/MAX701/MAX702
Power-Supply Monitor with Reset
_______________________________________________________________________________________ 3
PARAMETER CONDITIONS MIN TYP MAX UNITS
MAX701
RESET Output Low I
SINK
= 16mA, V
CC
= 5V 0.4 V
I
SOURCE
= 3.2mA, V
CC
= 4.25V
V
CC
-
0.4
I
SOURCE
= 1.6mA, V
CC
= 3V
V
CC
-
0.4
RESET Output High
I
SOURCE
= 0.5mA, V
CC
= 1.5V
V
CC
-
0.4
V
I
SINK
= 3.2mA, V
CC
= 4.25V 0.4
I
SINK
= 1.6mA, V
CC
= 3V 0.4RESET Output Low
I
SINK
= 0.4mA, V
CC
= 1.5V 0.4
V
RESET Output High I
SOURCE
= 3.2mA, V
CC
= 5V
V
CC
-
0.4
V
MAX702
I
SINK
= 3.2mA, V
CC
= 4.25V 0.4
I
SINK
= 1.6mA, V
CC
= 3V 0.4
RESET Output Low
I
SINK
= 0.4mA, V
CC
= 1.5V 0.4
V
RESET Output High I
SOURCE
= 3.2mA, V
CC
= 5V
V
CC
-
0.4
V
MAX700 ONLY (CTL = V
CC
, unless otherwise noted)
SENSE Input Threshold T
A
= T
MIN
to T
MAX
1.25 1.29 1.35 V
SENSE Input Current 0.1 nA
HYST Input On-Resistance 0.5 kΩ
CTL Input Threshold 2V
CTL Pulldown Current 30 100 µA
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +5V, CTL = GND on MAX700, T
A
= +25°C, unless otherwise noted.)
P1-P3P4-P6

MAX702CSA+

Mfr. #:
Buy MAX702CSA+
Manufacturer:
Maxim Integrated
Description:
Supervisory Circuits Power-Supply Monitor w/Reset
Lifecycle:
New from this manufacturer.
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