Rainbow Electronics MAX16055 - Manual

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
Features
♦ 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
♦ Adjustable Voltage Threshold Monitors Down to
0.5V with 1.5% Accuracy
♦ Open-Drain RESET Output with 70µA Internal
Pullup
♦ Fixed 140ms (min) Reset Timeout Period
♦ Manual Reset Input
♦ Reset Valid for IN1 ≥ 1V or IN2 ≥ 1V
♦ Tolerance Select (5%/10%) Input
♦ Immune to Short Supply Transients
MAX16055
Ultra-Small, Hex Voltage,
Microprocessor Supervisor
________________________________________________________________ Maxim Integrated Products 1
1 +
2
3
4
5
10
9
8
7
6
GND
RESET
MR
TOL IN4
IN3
IN2
IN1
MAX16055
µMAX
TOP VIEW
IN6 IN5
Pin Configuration
Ordering Information
MAX16055
µP
RESET
V CC
10k Ω
IN2
MR
GND TOL
MONITORED
SUPPLIES
IN1
0.1 µF
IN3
IN4
IN5
IN6
Typical Operating Circuit
19-4411; Rev 0; 1/09
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.
+ 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.
PART TEMP RANGE PIN-PACKAGE
MAX16055_AUB+* -40°C to +125°C 10 µMAX
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.