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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX6703A Datasheet

Low-Voltage / SOT23 uP Supervisors

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MAX6703A pdf
MAX6701-08/
MAX6701A-03A/
MAX6705A-07A
Low-Voltage, SOT23 µP Supervisors with Power-Fail
In/Out, Manual Reset, and Watchdog Timer
General Description
The MAX6701–MAX6708 microprocessor (µP) supervisory
circuits reduce the complexity and components required
to monitor power-supply functions in µP systems. These
devices significantly improve system reliability and accu-
racy compared to separate ICs or discrete components.
The MAX6701−MAX6708 family provides four func-
tions: a reset output during power-up, power-down, and
brownout conditions; an independent watchdog output
that goes low if the watchdog input has not been toggled
within 1.6s; a 0.62V threshold detector for power-fail
warning; and an active-low manual reset input.
The MAX6701–MAX6708 family offers several pinout
options to accommodate a variety of multivoltage micro-
processor supervision applications.
The MAX6701(A)/MAX6702(A)/MAX6703(A) monitor
three supply voltages (one fixed threshold and two
adjustable) to drive a single reset output and include a
manual reset input and a watchdog timer with an inde-
pendent output. The MAX6704 monitors a single-supply
voltage to drive complementary reset outputs and
includes an independent adjustable power-fail-in/power-
fail-out comparator, a manual reset input, and a reset-
based watchdog timer. The MAX6705(A)/MAX6706(A)/
MAX6707(A) monitor a single-supply voltage to drive
a single reset output and include an independent
adjustable power-fail-in/power-fail-out comparator, a
manual reset input, and a watchdog timer with an inde-
pendent output. The MAX6708 is the same as the
MAX6704 but without the watchdog timer function.
See the Detailed Description for differences between
non-A and A versions.
Applications
● Computers
● Controllers
● Intelligent Instruments
● Critical µP Power
Monitoring
● White Goods
● Networking
● Telecommunications
Typical Operating Circuit and Selector Guide appear at
end of data sheet.
Features
● Small 8-Pin SOT23 Package
● Precision Monitoring of +5.0V, +3.3V, +3.0V, +2.5V
Supply Voltages
● 140ms Reset Timeout Delay
● Power-Fail Input with Independent Output; Monitor
Inputs Down to 0.62V (MAX6704−MAX6708)
● Dual Adjustable Reset Input for Triple-Voltage
Monitoring (MAX6701(A)/MAX6702(A)/MAX6703(A))
● 1.6s Watchdog Timeout Period
(MAX6701(A)−MAX6707(A))
● Independent Watchdog Output
(MAX6701(A)/MAX6702(A)/MAX6703(A)/
MAX6705(A)/MAX6706(A)/MAX6707(A))
● Manual Reset Input
● Four Reset Output Stage Options
Active Low Push-Pull (MAX6701(A), MAX6705(A))
Active Low Open Drain (MAX6703(A), MAX6707(A))
Active High Push-Pull (MAX6702(A), MAX6706(A))
Dual Active Low/High Push-Pull (MAX6704,
MAX6708)
● Guaranteed Reset Valid to VCC = 1V
● Immune to Short Falling VCC Transients
● Low Cost, Few External Components
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX6701_KA-T
-40°C to +125°C 8 SOT23
MAX6701A_KA-T -40°C to +125°C 8 SOT23
Insert the desired suffix letter (from the Threshold Suffix Guide
table) into the blank to complete the part number. All devices
must be ordered in increments of 2500 pieces. Sample stock is
typically held on standard versions only. Contact factory for
availability.
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
Ordering Information continued at end of data sheet.
Pin Configurations
TOP VIEW
MR 1
VCC 2
GND 3
RST_IN1 4
MAX6701(A)
MAX6702(A)
MAX6703(A)
8 WDO
7 RESET (RESET)
6 WDI
5 RST_IN2
( ) ARE FOR MAX6702(A) ONLY. SOT23
Pin Configurations continued at end of data sheet.
19-1952; Rev 4; 5/14


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX6703A Datasheet

Low-Voltage / SOT23 uP Supervisors

No Preview Available !

MAX6703A pdf
MAX6701-08/
MAX6701A-03A/
MAX6705A-07A
Low-Voltage, SOT23 µP Supervisors with Power-Fail
In/Out, Manual Reset, and Watchdog Timer
Absolute Maximum Ratings
VCC........................................................................-0.3V to +6.0V
Open-Drain RESET, WDO, PFO .........................-0.3V to +6.0V
Push-Pull RESET, RESET, WDO, PFO.... -0.3V to (VCC + 0.3V)
MR, WDI, PFI, RST_IN1, RST_IN2.......... -0.3V to (VCC + 0.3V)
Input Current (VCC).............................................................20mA
Output Current (O, WDO)...................................................20mA
Continuous Power Dissipation (TA = +70°C)
8-Pin SOT23 (derate 8.9mW/°C above +70°C)...........714mW
Operating Temperature Range.......................... -40°C to +125°C
Junction Temperature.......................................................+150°C
Storage Temperature Range............................. -65°C to +150°C
Lead Temperature (soldering, 10s).................................. +300°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
(VCC = +4.25V to +5.5V for L/M versions, VCC = +2.55V to +3.6V for the T/S/R versions, VCC = +2.1V to +2.75V for the Z/Y versions.
TA = -40°C to +125°C, unless otherwise specified. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Operating Voltage Range
Supply Current
MR Unconnected
VCC Reset Threshold
(VCC falling)
Reset Threshold
Temperature Coefficient
VCC
ICC
VTH
∆VTH
TA = 0°C to +125°C
TA = -40°C to +125°C
VCC < 5.5V, no load
VCC < 3.6V, no load
VCC < 3.6V, no load (MAX6708 only)
MAX670_L/MAX670_AL
TA = -40°C to +85°C
TA = -40°C to +125°C
MAX670_M/MAX670_AM
TA = -40°C to +85°C
TA = -40°C to +125°C
MAX670_T/MAX670_AT
TA = -40°C to +85°C
TA = -40°C to +125°C
MAX670_S/MAX670_AS
TA = -40°C to +85°C
TA = -40°C to +125°C
MAX670_R/MAX670_AR
TA = -40°C to +85°C
TA = -40°C to +125°C
MAX670_Z/MAX670_AZ
TA = -40°C to +85°C
TA = -40°C to +125°C
MAX670_Y/MAX670_AY
TA = -40°C to +85°C
TA = -40°C to +125°C
1.0 5.5
1.2 5.5
12 25
9 20
6 20
4.50 4.63 4.75
4.47 4.78
4.25 4.38 4.50
4.22 4.53
3.00 3.08 3.15
2.97 3.17
2.85 2.93 3.00
2.83 3.02
2.55 2.63 2.70
2.53 2.72
2.25 2.32 2.38
2.24 2.40
2.12 2.19 2.25
2.11 2.27
V
µA
V
60 ppm/°C
VCC to Reset Output Delay
Reset Timeout Period
VCC Falling to WDO Delay
VCC falling at 10mV/µs
12
tRP
TA = -40°C to +85°C
TA = -40°C to +125°C
140 200 280
120 300
MAX6701(A)/MAX6702(A)/MAX6703(A)/MAX6705(A)/
MAX6706(A)/MAX6707(A)
5
µs
ms
µs
PFI, RST_IN1, RST_IN2
Threshold
PFI Hysteresis
VCC = 1.8V to 5.5V
TA = -40°C to +85°C
TA = -40°C to +125°C
602 618 634
593 642
6
mV
mV
www.maximintegrated.com
Maxim Integrated 2


Part Number MAX6703A
Description Low-Voltage / SOT23 uP Supervisors
Maker Maxim Integrated
Total Page 12 Pages
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