Rainbow Electronics MAX6338 User Manual

General Description

The MAX6338 quad voltage monitor is capable of moni­toring up to four supplies without any external compo­nents. 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 com­parator, or digital level translator.

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 temper­ature range.

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
outputs low when VCCdrops below the minimum operat­ing voltage. The four digital outputs all have weak inter­nal pull-ups to VCC, allowing wire-ORed connection.
Each input threshold voltage has an independent output.

The MAX6338 is available in a 10-pin µMAX package.

________________________Applications

Telecommunications

High-End Printers

Desktop and Notebook Computers

Data Storage Equipment

Networking Equipment

Industrial Equipment

Set-Top Boxes

Features

♦ 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

MAX6338

Quad Voltage Monitor in µMAX Package

________________________________________________________________ Maxim Integrated Products 1

Pin Configuration

NOMINAL INPUT VOLTAGE

PART

SUPPLY

TOLERANCE

(%)

MAX6338AUB

5

10

MAX6338BUB

5

5

MAX6338CUB

5

10

MAX6338DUB

5

5

MAX6338EUB

5

10

MAX6338FUB

5

5

MAX6338GUB

5

10

MAX6338HUB

5

5

MAX6338IUB

5

10

MAX6338JUB

5

5

MAX6338KUB

10

MAX6338LUB

5

MAX6338MUB

5

-5 10

MAX6338NUB

5

-5 5

MAX6338OUB

5

-5 10

MAX6338PUB

5

-5 5

19-1695; Rev 1; 7/01

Ordering Information

Selector Guide

*Insert the desired letter from the Selector Guide into the blank
to complete the part number.

*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

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.

PART TEMP. RANGE PIN-PACKAGE

MAX6338_UB* -40°C to +85°C 10 µMAX

IN1

IN2

IN3

TOP VIEW

1

IN1

2

IN2

3

IN3

4

5

10

V

CC

9

MAX6338

µMAX

OUT1

8

OUT2

7

OUT3IN4

OUT4GND

6

(V)

(V)

3.3 2.5 Adj*

3.3 2.5† Adj*

3.3 1.8 Adj*

3.3 1.8† Adj*

3.0 2.5 Adj*

3.0 2.5† Adj*

3.0 1.8 Adj*

3.0 1.8† Adj*

3.3 2.5 1.8

3.3 2.5† 1.8†

Adj* 3.3 2.5 Adj*

Adj* 3.3 2.5† Adj*

3.0 Adj*

3.0 Adj*

3.3 Adj*

3.3 Adj*

(V)

IN4

(V)

MAX6338

Quad Voltage Monitor in µMAX Package

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC= +2.5V to +5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C and VCC= +5V, unless other­wise noted.) (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.

Terminal Voltage (with respect to GND)

V

CC

......................................................................-0.3V to +6V

Output Voltages (OUT_) ...........................................-0.3V to +6V

Input Voltages (IN_) (except -5V).............................-0.3V to +6V

Input Voltage (-5V input) ..........................................-6V to +0.3V

Continuous OUT_ Current...................................................20mA

Continuous Power Dissipation (T

A

= +70°C)

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

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

Note 1: 100% production tested at +25°C. Overtemperature limits guaranteed by design.
Note 2: Guaranteed by design.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Voltage Range V

Supply Current I

Input Current (Note 2) I

+5.0V (-5%) Threshold V

+5.0V (-10%) Threshold V

+3.3V (-5%) Threshold V

+3.3V (-10%) Threshold V

+3.0V (-5%) Threshold V

+3.0V (-10%) Threshold V

+2.5V (-10%) Threshold V

+1.8V (-10%) Threshold V

-5.0V (+5%) Threshold V

-5.0V (+10%) Threshold V

Adjustable Threshold V

Threshold Voltage Temperature
Coefficient

Threshold Hysteresis V

Propagation Delay t

Output Low Voltage V

Output High Voltage V

CC

CC

IN_

TH

TH

TH

TH

TH

TH

TH

TH

TH

TH

TH

THYST

pd

OL

OH

VCC = +3V 25 50

VCC = +5V 35 65

V

= input threshold voltage

IN_

(+1.8V, +2.5V, +3.0V, +3.3V, +5.0V)

V

= 0 to V

IN_

CC

(input threshold voltage =1.23V)

V

= -5V

IN_

(input threshold voltage = -5V)

VIN decreasing 4.5 4.63 4.75 V

VIN decreasing 4.25 4.38 4.50 V

VIN decreasing 3.0 3.08 3.15 V

VIN decreasing 2.85 2.93 3.00 V

VIN decreasing 2.7 2.78 2.85 V

VIN decreasing 2.55 2.63 2.70 V

VIN decreasing 2.13 2.19 2.25 V

VIN decreasing 1.53 1.58 1.62 V

VIN increasing -4.75 -4.63 -4.50 V

VIN increasing -4.5 -4.38 -4.25 V

VIN decreasing 1.20 1.23 1.26 V

V

= VTH to (VTH - 50mV) or

IN_

to (VTH - 50mV)

V

TH

VCC = 5V, I

VCC = 2.5V, I

VCC = 1V, I

VCC > 2.5V, I

= 2mA 0.4

SINK

= 1.2mA 0.4

SINK

= 50µA0.4

SINK

SOURCE

= 6µA (minimum) 0.8 x V

+2.5 +5.5 V

25 40

-0.1 +0.1

-10 -20

60 ppm/°C

0.3 %

20 µ s

CC

µA

µA

V

V

MAX6338

Quad Voltage Monitor in µMAX Package

_______________________________________________________________________________________ 3

Typical Operating Characteristics

(VCC= +5V, TA= +25°C, unless otherwise noted.)

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

45

TA = -40°C

TA = +25°C

MAX6338-01

NORMALIZED THRESHOLD ERROR (%)

40

35

30

25

SUPPLY CURRENT (µA)

20

15

10

TA = +85°C

2.5 3.5 4.03.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)

OUTPUT VOLTAGE LOW

vs. SINK CURRENT

0.6

0.5

0.4

0.3

0.2

OUTPUT VOLTAGE LOW (V)

0.1

TA = +25°C

TA = +85°C

VCC = 5V

TA = -40°C

MAX6338-04

50mV/div

NORMALIZED THRESHOLD ERROR

0.10

0.08

0.06

0.04

0.02

0

-0.02

-0.04

-0.06

2.5 3.53.0 4.0 4.5 5.0 5.5

IN_

OUT_

2V/div

vs. SUPPLY VOLTAGE

NORMALIZED TO +5V

SUPPLY VOLTAGE (V)

PROPAGATION DELAY

(WITH 100mV OVERDRIVE)

0.1

MAX6338-02

0

-0.1

-0.2

NORMALIZED THRESHOLD (%)

-0.3

-40 20 40-20 0

MAX6338-05

IN_

20mV/div

OUT_

2V/div

NORMALIZE THRESHOLD

vs. TEMPERATURE

VCC = +5V

TEMPERATURE (°C)

PROPAGATION DELAY

(WITH 20mV OVERDRIVE)

MAX6338-03

60

80

MAX6338-06

0

04312 5678910

SINK CURRENT (mA)

10µs/div

10µs/div