19-1695; Rev 2; 12/05
Quad Voltage Monitor in µMAX Package
General Description
Features
The MAX6338 quad voltage monitor is capable of moni-
toring up to four supplies without any external compo-
nents. A variety of factory-trimmed threshold voltages
and supply tolerances are available to optimize the
MAX6338 for specific applications. The selection
includes input options for monitoring +5.0V, +3.3V,
+3.0V, +2.5V, +1.8V, and -5.0V voltages. An additional
high-input impedance comparator option can be used
as an adjustable voltage monitor, general-purpose com-
parator, or digital level translator.
♦ Monitors Four Voltages (Factory Programmed or
User Adjustable)
+5.0V, +3.3V, +3.0V, +2.5V, +1.8V, -5.0V
(nominal) or User-Adjustable Settings
♦ Low 25µA Supply Current
♦ Four Independent, Open-Drain, Active-Low
Outputs
♦ +2.5V to +5.5V Supply Voltage Range
♦ Guaranteed from -40°C to +85°C
♦ No External Components Required
♦ Small 10-Pin µMAX Package
Each of the monitored voltages is available with trip
thresholds to support power-supply tolerances of either
5% or 10% below the nominal voltage. An internal
bandgap reference ensures accurate trip thresholds
across the extended (-40°C to +85°C) operating temper-
ature range.
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
The MAX6338 consumes 25µA (typ) supply current and
operates with supply voltages from +2.5V to +5.5V. An
internal undervoltage lockout circuit forces all four digital
MAX6338_UB*
-40°C to +85°C
10 µMAX
*Insert the desired letter from the Selector Guide into the blank
to complete the part number.
outputs low when V
drops below the minimum operat-
CC
Devices are available in both leaded and lead-free packaging.
Specify lead free by adding the + symbol at the end of the part
number when ordering.
ing voltage. The four digital outputs all have weak inter-
nal pull-ups to V , allowing wire-ORed connection.
CC
Each input threshold voltage has an independent output.
The MAX6338 is available in a 10-pin µMAX® package.
Selector Guide
NOMINAL INPUT VOLTAGE
SUPPLY
TOLERANCE
(%)
________________________Applications
IN1
(V)
IN2
(V)
IN3
(V)
IN4
(V)
PART
Telecommunications
High-End Printers
MAX6338AUB
MAX6338BUB
MAX6338CUB
MAX6338DUB
MAX6338EUB
MAX6338FUB
MAX6338GUB
MAX6338HUB
MAX6338IUB
MAX6338JUB
MAX6338KUB
MAX6338LUB
MAX6338MUB
MAX6338NUB
MAX6338OUB
MAX6338PUB
5
5
3.3
3.3
3.3
3.3
3.0
3.0
3.0
3.0
3.3
3.3
3.3
3.3
3.0
3.0
3.3
3.3
2.5
Adj*
10
5
Desktop and Notebook Computers
Data Storage Equipment
Networking Equipment
Industrial Equipment
Set-Top Boxes
2.5† Adj*
1.8 Adj*
1.8† Adj*
2.5 Adj*
2.5† Adj*
1.8 Adj*
1.8† Adj*
2.5 1.8
2.5† 1.8†
2.5 Adj*
2.5† Adj*
5
10
5
5
5
10
5
5
5
10
5
5
Pin Configuration
5
10
5
TOP VIEW
5
Adj*
Adj*
5
10
5
IN1
IN2
1
2
3
4
5
10
9
V
CC
OUT1
OUT2
OUT3
OUT4
Adj*
Adj*
Adj*
Adj*
-5
-5
-5
-5
10
5
MAX6338
IN3
8
5
IN4
7
5
10
5
GND
6
5
*Adjustable voltage based on +1.23V internal threshold. External
threshold voltage can be set using an external resistor-divider.
† Nominal input voltages for 1.8V and 2.5V are specified for 10%
tolerances
µMAX
µMAX is a registered trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products
1
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.