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MAX6339IUT-T

P1-P3P4-P6P7-P9
General Description
The MAX6339 is a precision quad voltage monitor with
microprocessor (µP) supervisory reset timing. The device
can monitor up to four system supply voltages without
any external components and asserts a single reset if any
supply voltage drops below its preset threshold. The
device significantly reduces system size and component
count while improving reliability compared to separate
ICs or discrete components.
A variety of factory-trimmed threshold voltages are avail-
able to accommodate different supply voltages and toler-
ances with minimal external component requirements.
The selection includes internally fixed options for monitor-
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
available with one or two user-adjustable threshold
options if non-standard thresholds are desired (use exter-
nal resistor-divider network).
The quad monitor provides a single active-low reset out-
put that is asserted when any monitored input is below its
associated threshold. The output is open drain with a
weak internal pullup (10µA) 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
as either the IN1 or IN2 input voltage remains > 1V.
The MAX6339 is available in a small 6-pin SOT23 pack-
age and operates over the extended (-40°C to +85°C)
temperature range.
________________________Applications
Telecommunications
High-End Printers
Desktop and Network Computers
Data Storage Equipment
Networking Equipment
Industrial Equipment
Set-Top Boxes
Features
♦ Monitors Four Power-Supply Voltages
♦ Precision Factory-Set Reset Threshold Options
for +5.0V, +3.3V, +3.0, +2.5V, +1.8V, and -5.0V
Supplies
♦ User-Adjustable Voltage Monitoring Threshold
Options
♦ Low 55µA Supply Current
♦ Open-Drain RESET Output with 10µA Internal
Pullup
♦ 140ms (min) Reset Timeout Period
♦ RESET Valid to IN1 = 1V or IN2 = 1V
♦ Immune to Short Monitored Supply Transients
♦ No External Components Required
♦ Guaranteed from -40°C to +85°C
♦ Small 6-Pin SOT23 Package
MAX6339
Quad Voltage µP Supervisory Circuit
in SOT Package
________________________________________________________________ Maxim Integrated Products 1
19-1756; Rev 3; 12/05
Ordering Information
*Insert the desired letter from the Selector Guide into the blank
to complete the part number. There is a 2500 piece minimum
order increment requirement on the SOT package and these
devices are available in tape-and-reel only.
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
Pin Configuration appears at end of data sheet.
PART TEMP. RANGE
PIN-PACKAGE
MAX6339_UT-T*
-40°C TO +85°C
6 SOT23-6
MAX6339
IN1
IN2
IN3
IN4
RESET
GND
SUPPLIES
TO BE
MONITORED
µP
Typical Operating Circuit
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
MAX6339
Quad Voltage µP Supervisory Circuit
in SOT Package
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.
Terminal Voltage (with respect to GND)
Input Voltages (IN_ ) (except -5V)............................-0.3V to +6V
RESET.......................................................................-0.3V to +6V
Input Voltage (-5V Input) ..........................................-6V to +0.3V
Continuous RESET Current .................................................20mA
Continuous Power Dissipation (T
A
= +70°C)
6-pin SOT23 (derate 8.7mW/°C above +70°C).........695.7mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN
MAX
UNITS
Supply Voltage Range
(Notes 2, 3)
V
IN2
1.0 5.5 V
V
IN
_ = input threshold voltage (input threshold
voltage of 1.8V, 2.5V, 5V)
25 40
V
IN2
= input threshold voltage (input threshold
voltage of 3.0V, 3.3V) (Note 4)
55
115
V
IN
_ = 0 to V
IN2
(input threshold voltage = +1.23V)
-0.1 +0.1
V
IN1
= 1.5V (MAX6339 K/L only) 0.4 1.5
Input Current
I
IN
_
V
IN
_ = -5V (input threshold voltage = -5V) -15 -20
µA
+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
+3.0V (-5%) threshold
2.70 2.78 2.85
+3.0V (-10%) threshold
2.55 2.63 2.70
+2.5V (-10% ) threshold
2.13 2.19 2.25
V
IN
_
decreasing
+1.8V (-10%) threshold
1.53 1.58 1.62
-5V (+5%) threshold
-4.75 -4.63 -4.50
Reset
Threshold Voltage
V
TH
V
IN
_
increasing
-5V (+10%) threshold
-4.50 -4.38 -4.25
V
Adjustable Threshold V
TH
V
IN
decreasing
1.20 1.23 1.26
V
Threshold Voltage
Temperature Coefficient
60
ppm/°C
Threshold Hysteresis V
HYST
0.3 %
Reset Delay t
RD
V
IN
= V
TH
to (V
TH
- 50mV) (all inputs except –5V)
or V
IN
_ = V
TH
to (V
TH
+ 50mV) (-5V input only)
20 µs
Reset Active Timeout
Period
t
RP
140 200 280
ms
ELECTRICAL CHARACTERISTICS
(V
IN2
= +1V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
IN2
= +3.0V to +3.3V, T
A
= +25°C, unless
otherwise noted.) (Note 1)
MAX6339
Quad Voltage µP Supervisory Circuit
in SOT Package
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN2
= +1V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
IN2
= +3.0V to +3.3V, T
A
= +25°C, unless
otherwise noted.) (Note 1)
Note 1: 100% production tested at T
A
= +25°C. Limits over temperature guaranteed by design.
Note 2: The device is powered from input IN2.
Note 3: The RESET output is guaranteed to be in the correct state for IN1 or IN2 down to 1V.
Note 4: Monitored voltage (+3.3V, +3.0V) is also the device power supply. Supply current splits as follows: 25µA for the resistor-
divider (for the monitored voltage) and 30µA for other circuits.
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
V
IN2
= 5V, I
SINK
= 2mA 0.4
V
IN2
= 2.5V, I
SINK
= 1.2mA 0.4Output Low Voltage V
OL
V
IN1
= V
IN2
= 1V, I
SINK
= 50µA 0.4
V
Output High Voltage V
OH
V
IN2
> 2.55V, I
SOURCE
= 6µA
(RESET unasserted)
0.8
✕
V
IN2
V
Output High Source
Current
I
OH
V
IN2
> 2.55V (RESET unasserted) 6 10 µA
35
50
45
40
55
60
65
70
75
80
85
-40 0-20 20 406080
I
IN2
INPUT CURRENT vs. TEMPERATURE
MAX6339toc01
TEMPERATURE (
°
C)
I
IN2
INPUT CURRENT (µA)
V
IN2
= +3.3V
V
IN2
= +3.0V
50
60
55
70
65
80
75
85
3.0 4.03.5 4.5 5.0 5.5
I
IN2
INPUT CURRENT
vs. I
IN2
VOLTAGE
MAX6339toc02
INPUT VOLTAGE (V)
I
IN2
INPUT CURRENT ( µA)
-0.30
-0.15
-0.20
-0.25
-0.10
-0.5
0
0.05
0.10
0.15
-40 0-20 20 406080
NORMALIZED THRESHOLD ERROR
vs. TEMPERATURE
MAX6339toc03
TEMPERATURE (
°
C)
NORMALIZED THRESHOLD ERROR (%)
V
TH
= +5V
V
TH
= 1.8V
V
IN2
= +3.0V
Typical Operating Characteristics
(V
IN2
= +3.0V, T
A
= +25°C)
P1-P3P4-P6P7-P9

MAX6339IUT-T

Mfr. #:
Buy MAX6339IUT-T
Manufacturer:
Maxim Integrated
Description:
IC SUPERVISOR SOT23
Lifecycle:
New from this manufacturer.
Delivery:
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