Rainbow Electronics MAX16055 User Manual

General Description

The MAX16055 precision hex voltage microprocessor
(µP) supervisory circuit monitors up to six system-sup­ply voltages and asserts a single reset when any one
supply voltage drops below its preset threshold. The
device significantly reduces system size and compo­nent count while improving reliability compared to multi­ple ICs or discrete components.

A variety of factory-trimmed threshold voltages are avail­able to accommodate different supply voltages and tol­erance 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 thresh­old. 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 avail­able 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

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

MAX16055

Ultra-Small, Hex Voltage,

Microprocessor Supervisor

________________________________________________________________

Maxim Integrated Products

1

Pin Configuration

Ordering Information

MAX16055

µP

RESET

V

CC

10kΩ

IN2

MR

GND

TOL

MONITORED

SUPPLIES

IN1

0.1µF

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

-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.

MAX16055_AUB+*

TOP VIEW

IN1

1 +

2

3

4

5

MAX16055

µMAX

IN2

IN3

GND

10

RESET

9

MR

8

TOLIN4

7

6

IN6IN5

MAX16055

Ultra-Small, Hex Voltage,
Microprocessor Supervisor

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(V

IN1

= 1V to 5.5V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at V

IN1

= 3.3V, TA= +25°C.) (Note 1)

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.

RESET, TOL, MR, IN_ to GND ..................................-0.3V to +6V

Input/Output Current (all pins) ............................................20mA

Continuous Power Dissipation (TA= +70°C)

10-Pin µMAX (derate 5.6mW/°C above +70°C) ...........444mW

Operating Temperature Range .........................-40°C to +125°C

Storage Temperature Range .............................-65°C to +150°C

Junction Temperature......................................................+150°C

Lead Temperature (soldering, 10s) .................................+300°C

Operating Voltage Range V

Input Current (Note 3) I

Threshold Voltage V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT

IN1

IN_

TH

(Note 2) 1.0 5.5 V

V

= nominal input voltage (for IN2–IN6;

IN_

3.3V, 3.0V, 2.5V, 1.8V, 1.5V, 1.2V, 1.1V,

1.0V, 0.9V supplies)

V

= nominal input voltage (for +3.3V IN1

IN1

supply)

V

= 0 to 0.5V or V

IN_

thresholds)

V

decreasing

IN_

(for adjustable

ADJ

3.3V, TOL = GND 3.00 3.08 3.15

3.3V, TOL = V

3.0V, TOL = GND 2.70 2.78 2.85

3.0V , TOL = V

2.5V, TOL = GND 2.25 2.32 2.38

2.5V, TOL = V

1.8V, TOL = GND 1.62 1.67 1.71

1.8V, TOL = V

1.5V, TOL = GND 1.355 1.389 1.425

1.5V, TOL = V

1.2V, TOL = GND 1.084 1.112 1.140

1.2V, TOL = V

1.1V, TOL = GND 0.993 1.019 1.045

1.1V, TOL = V

1.0V, TOL = GND 0.903 0.926 0.95

1.0V, TOL = V

0.9V , TOL = GND 0.813 0.834 0.855

0.9V, TOL = V

25 40

55 115

-0.1 +0.1

IN1

IN1

IN1

IN1

IN1

IN1

IN1

IN1

2.85 2.93 3.00

2.55 2.63 2.70

IN1

2.13 2.19 2.25

1.53 1.58 1.62

1.283 1.316 1.350

1.027 1.053 1.08

0.941 0.965 0.99

0.856 0.878 0.90

0.770 0.790 0.810

µA

V

MAX16055

Ultra-Small, Hex Voltage,

Microprocessor Supervisor

_______________________________________________________________________________________ 3

Note 1: 100% production tested at TA= +25°C. Limits over temperature guaranteed by design.
Note 2: The devices are powered from IN1.
Note 3: Monitored IN1 voltage is also the device power supply.
Note 4: RESET output is guaranteed to be in the correct state for IN1 or IN2 falling down to 1V.

ELECTRICAL CHARACTERISTICS (continued)

(V

IN1

= 1V to 5.5V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at V

IN1

= 3.3V, TA= +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT

Adjustable Threshold V

Reset Threshold Hysteresis V

Reset Threshold Temperature
Coefficient

IN_ to Reset Delay t

Reset Timeout Period t

RESET Output Low (Note 4) V

RESET Output High V

RESET Output High Source

Current

TOL Input Current TOL = IN1 100 nA

MR, TOL Input Voltage Low V

MR, TOL Input Voltage High V

MR Minimum Pulse Width 1µs
MR Glitch Rejection 100 ns
MR-to-RESET Delay 200 ns
MR Pullup Resistance 10 20 33 kΩ

TH

HYST

RD

RP

OL

OH

I

OH

IL

IH

V

decreasing

IN_

V

increasing relative to V

IN_

V

falling at 10mV/µs from (VTH + 50mV)

IN_

- 50mV)

to (V

TH

V

= 5V, I

IN1

V

= 2.5V, I

IN1

V

= 1.0V, I

IN1

V

> 2.55V, I

IN1

not asserted

V

> 2.55V, RESET not asserted 70 µA

IN1

= 2mA 0.3

SINK

SINK

SINK

SOURCE

TOL = GND 0.491 0.5 0.506

TOL = V

= 1.2mA 0.4

= 50µA 0.3

= 6µA (min), RESET

CC

decreasing 0.3 %V

IN_

0.465 0.472 0.479

60 ppm/°C

20 µs

140 200 280 ms

0.8 x
V

IN1

0.7 x
V

IN1

0.3 x
V

IN1

V

V

V

V

V

TH