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PDF MAX16055 Data sheet ( Hoja de datos )

Número de pieza MAX16055
Descripción Microprocessor Supervisor
Fabricantes Maxim Integrated Products 
Logotipo Maxim Integrated Products Logotipo



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No Preview Available ! MAX16055 Hoja de datos, Descripción, Manual

19-4411; Rev 0; 1/09
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Ultra-Small, Hex Voltage,
Microprocessor Supervisor
General Description
The MAX16055 precision hex voltage microprocessor
(µP) supervisory circuit monitors up to six system-sup-
ply voltages and asserts a single reset when any one
supply voltage drops below its preset threshold. The
device significantly reduces system size and compo-
nent count while improving reliability compared to multi-
ple ICs or discrete components.
A variety of factory-trimmed threshold voltages are avail-
able to accommodate different supply voltages and tol-
erance with minimal external components. The
MAX16055 includes internally fixed threshold options for
monitoring 3.3V, 3.0V, 2.5V, 1.8V, 1.5V, 1.2V, 1.1V, 1.0V,
and 0.9V supplies with -5% or -10% tolerance. The
MAX16055 is also available with one to five adjustable
threshold inputs to monitor voltages down to 0.5V.
A single active-low, open-drain output asserts when
any monitored input falls below its associated thresh-
old. The reset output features a weak internal pullup
(typically 70µA) to supply input IN1. The reset output
remains low for the reset timeout period (140ms, min)
after all voltages rise above the selected thresholds.
The reset output remains valid as long as either IN1 or
IN2 input voltage is above 1V. The MAX16055 is avail-
able in a small 10-pin µMAX® (3mm x 3mm) package.
The MAX16055 operates over the -40°C to +125°C
automotive temperature range.
Applications
Telecommunications
High-End Printers
Desktop and Notebook
Computers
Data Storage Equipment
Networking Equipment
Industrial Equipment
Set-Top Boxes
Servers/Workstations
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Pin Configuration
TOP VIEW
IN1 1 +
IN2 2
IN3 3
IN4 4
MAX16055
IN5 5
µMAX
10 GND
9 RESET
8 MR
7 TOL
6 IN6
Features
o Precision Factory-Set Reset Threshold Options
3.3V, 3.0V, 2.5V, 1.8V, 1.5V, 1.2V, 1.1V, 1.0V, and
0.9V
o Adjustable Voltage Threshold Monitors Down to
0.5V with 1.5% Accuracy
o Open-Drain RESET Output with 70µA Internal
Pullup
o Fixed 140ms (min) Reset Timeout Period
o Manual Reset Input
o Reset Valid for IN1 1V or IN2 1V
o Tolerance Select (5%/10%) Input
o Immune to Short Supply Transients
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX16055_AUB+* -40°C to +125°C
10 µMAX
+Denotes a lead(Pb)-free/RoHS-compliant package.
*Insert the desired threshold option letter from the Selector
Guide into the blank to complete the part number. Contact factory
for availability.
Typical Operating Circuit
0.1µF
MONITORED
SUPPLIES
MAX16055
IN1
RESET
IN2
IN3
IN4
IN5
IN6
MR
GND TOL
10kVCC
µP
________________________________________________________________ Maxim Integrated Products 1
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.

1 page




MAX16055 pdf
www.DataSheet4U.com
Ultra-Small, Hex Voltage,
Microprocessor Supervisor
Typical Operating Characteristics (continued)
(VIN1 = 3.3V, TA = +25°C, unless otherwise noted.)
RESET TIMEOUT DELAY
MAX16055 toc09
IN_
1V/div
MR-TO-RESET PROPAGATION DELAY
MAX16055 toc10
VIN = 3.3V
MR
2V/div
40ms/div
RESET
1V/div
40ns/div
RESET
2V/div
Pin Description
PIN NAME
FUNCTION
1
IN1
Voltage Input 1. IN1 is the power-supply input and voltage monitoring input for the device. Connect a 0.1µF
bypass capacitor from IN1 to GND. Keep IN1 or IN2 > 1V to ensure RESET is valid.
2 IN2 Voltage Input 2. See the Selector Guide for voltage threshold. Keep IN1 or IN2 > 1V to ensure RESET is valid.
3 IN3 Voltage Input 3. See the Selector Guide for voltage threshold.
4 IN4 Voltage Input 4. See the Selector Guide for voltage threshold.
5 IN5 Voltage Input 5. See the Selector Guide for voltage threshold.
6 IN6 Voltage Input 6. See the Selector Guide for voltage threshold.
7 TOL Threshold Tolerance Input. Connect TOL to GND to select thresholds 5% below nominal. Connect TOL to IN1
to select thresholds 10% below nominal.
8
MR
Active-Low Manual-Reset Input. When MR is low, RESET goes low and remains asserted for the reset timeout
period after MR is pulled high. MR is internally pulled high by a 20kpullup resistor to IN1.
Active-Low Reset Output. RESET goes low when any input (IN_) goes below the specified threshold. After all
9 RESET inputs rise above the specified threshold voltages, RESET remains low for 140ms (min) before going high.
The open-drain RESET output features a weak (70µA) internal pullup to IN1.
10 GND Ground
_______________________________________________________________________________________ 5

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