MAX6339
19-1756; Rev 3; 12/05
Quad Voltage P Supervisory Circuit
in SOT Package
General Description Features
The MAX6339 is a precision quad voltage monitor with
Monitors Four Power-Supply Voltages
microprocessor (P) supervisory reset timing. The device
Precision Factory-Set Reset Threshold Options
can monitor up to four system supply voltages without
for +5.0V, +3.3V, +3.0, +2.5V, +1.8V, and -5.0V
any external components and asserts a single reset if any
supply voltage drops below its preset threshold. The Supplies
device significantly reduces system size and component
User-Adjustable Voltage Monitoring Threshold
count while improving reliability compared to separate
Options
ICs or discrete components.
Low 55A Supply Current
A variety of factory-trimmed threshold voltages are avail-
able to accommodate different supply voltages and toler-
Open-Drain RESET Output with 10A Internal
ances with minimal external component requirements.
Pullup
The selection includes internally fixed options for monitor-
140ms (min) Reset Timeout Period
ing +5.0V, +3.3V, +3.0V, +2.5V, +1.8V, and -5.0V sup-
plies with -5% and/or -10% tolerances. The device is also
RESET Valid to IN1 = 1V or IN2 = 1V
available with one or two user-adjustable threshold
Immune to Short Monitored Supply Transients
options if non-standard thresholds are desired (use exter-
nal resistor-divider network).
No External Components Required
The quad monitor provides a single active-low reset out-
Guaranteed from -40C to +85C
put that is asserted when any monitored input is below its
associated threshold. The output is open drain with a
Small 6-Pin SOT23 Package
weak internal pullup (10A) to IN2. Reset remains low for
a reset timeout period (140ms min) after all voltages are
above the selected thresholds. The output is valid as long
Ordering Information
as either the IN1 or IN2 input voltage remains > 1V.
PART TEMP. RANGE PIN-PACKAGE
The MAX6339 is available in a small 6-pin SOT23 pack-
MAX6339_UT-T* -40C TO +85C 6 SOT23-6
age and operates over the extended (-40C to +85C)
temperature range.
*Insert the desired letter from the Selector Guide into the blank
to complete the part number. There is a 2500 piece minimum
________________________Applications
order increment requirement on the SOT package and these
devices are available in tape-and-reel only.
Telecommunications
Devices are available in both leaded and lead-free packaging.
High-End Printers
Specify lead-free by replacing -T with +T when ordering.
Desktop and Network Computers
Data Storage Equipment
Typical Operating Circuit
Networking Equipment
Industrial Equipment
Set-Top Boxes
MAX6339
IN1
SUPPLIES
IN2
TO BE
P
RESET
MONITORED
IN3
IN4
GND
Pin Configuration appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxims website at www.maxim-ic.com.Quad Voltage P Supervisory Circuit
in SOT Package
ABSOLUTE MAXIMUM RATINGS
Terminal Voltage (with respect to GND) Operating Temperature Range ...........................-40C to +85C
Input Voltages (IN_ ) (except -5V)............................-0.3V to +6V Storage Temperature Range .............................-65C to +150C
RESET.......................................................................-0.3V to +6V Junction Temperature......................................................+150C
Input Voltage (-5V Input) ..........................................-6V to +0.3V Lead Temperature (soldering, 10s) .................................+300C
Continuous RESET Current.................................................20mA
Continuous Power Dissipation (T = +70C)
A
6-pin SOT23 (derate 8.7mW/C above +70C).........695.7mW
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 = +1V to +5.5V, T = -40C to +85C, unless otherwise noted. Typical values are at V = +3.0V to +3.3V, T = +25C, unless
IN2 A IN2 A
otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage Range
V 1.0 5.5 V
IN2
(Notes 2, 3)
V _ = input threshold voltage (input threshold
IN
25 40
voltage of 1.8V, 2.5V, 5V)
V = input threshold voltage (input threshold
IN2
55 115
voltage of 3.0V, 3.3V) (Note 4)
Input Current
A
I _ V _ = 0 to V
IN
IN IN2
-0.1 +0.1
(input threshold voltage = +1.23V)
V = 1.5V (MAX6339 K/L only) 0.4 1.5
IN1
V _ = -5V (input threshold voltage = -5V) -15 -20
IN
+5V (-5%) threshold 4.50 4.63 4.75
+5V (-10%) threshold 4.25 4.38 4.50
+3.3V (-5%) threshold 3.00 3.08 3.15
+3.3V (-10%) threshold 2.85 2.93 3.00
V _
IN
decreasing
+3.0V (-5%) threshold 2.70 2.78 2.85
Reset
V V
TH
Threshold Voltage
+3.0V (-10%) threshold 2.55 2.63 2.70
+2.5V (-10% ) threshold 2.13 2.19 2.25
+1.8V (-10%) threshold 1.53 1.58 1.62
-5V (+5%) threshold -4.75 -4.63 -4.50
V _
IN
increasing
-5V (+10%) threshold -4.50 -4.38 -4.25
Adjustable Threshold V V decreasing 1.20 1.23 1.26 V
TH IN
Threshold Voltage
60 ppm/C
Temperature Coefficient
Threshold Hysteresis V 0.3 %
HYST
V = V to (V - 50mV) (all inputs except 5V)
IN TH TH
Reset Delay t 20 s
RD
or V _ = V to (V + 50mV) (-5V input only)
IN TH TH
Reset Active Timeout
t 140 200 280 ms
RP
Period
2 _______________________________________________________________________________________
MAX6339