MAX6830VGUT-T Maxim Integrated, MAX6830VGUT-T Datasheet

MAX6830VGUT-T

Manufacturer Part Number

MAX6830VGUT-T

Description

Supervisory Circuits

Manufacturer

Maxim Integrated

Series

MAX6826, MAX6827, MAX6828, MAX6829, MAX6830, MAX6831r

Datasheet

1.MAX6830THUT-T.pdf (12 pages)

Specifications of MAX6830VGUT-T

Number Of Voltages Monitored

Monitored Voltage

0.9 V to 2.5 V, 1.8 V to 5 V

Undervoltage Threshold

1.521 V, 1.074 V

Overvoltage Threshold

1.629 V, 1.146 V

Output Type

Active High, Push-Pull

Manual Reset

Resettable

Watchdog

Battery Backup Switching

No Backup

Power-up Reset Delay (typ)

320 ms

Supply Voltage - Max

5.5 V

Maximum Operating Temperature

+ 125 C

Mounting Style

SMD/SMT

Package / Case

SOT-23

Chip Enable Signals

Maximum Power Dissipation

696 mW

Minimum Operating Temperature

- 40 C

Power Fail Detection

Supply Current (typ)

10 uA

Supply Voltage - Min

1.2 V

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The MAX6826–MAX6831 are ultra-low-voltage micro-

processor (µP) supervisory circuits designed to monitor

two power supplies and have manual reset and watch-

dog input functions. These devices assert a system reset

if any of the monitored supplies fall below the prepro-

grammed thresholds, and maintain reset for a minimum

timeout period after the supplies rise above the threshold.

Microprocessor supervisors significantly improve system

reliability and accuracy compared to separate ICs or dis-

crete components. These devices monitor primary volt-

ages from +1.8V to +5.0V and secondary voltages from

+0.9V to +2.5V. These devices are guaranteed to be in

the correct state for V

A variety of preprogrammed reset threshold voltages

are available (see the Threshold Suffix Guide). The

devices include manual reset and watchdog inputs. The

MAX6829/MAX6830/MAX6831 provide a factory-

trimmed threshold to monitor a 2nd voltage down to

+0.9V. The MAX6826/MAX6829 have a push-pull

RESET, the MAX6827/MAX6830 have a push-pull

RESET and the MAX6828/MAX6831 have an open-drain

RESET. The MAX6826/MAX6827/MAX6828 have an aux-

iliary monitor that allows user adjustable input to monitor

voltages down to +0.6V. See Selector Guide for func-

tions available.

19-1867; Rev 2; 12/05

________________________Applications

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.

Typical Operating Circuit, Threshold Suffix Guide, and

Selector Guide appear at end of data sheet.

Portable/Battery-

Powered Equipment

Embedded Controllers

Intelligent Instruments

Dual Ultra-Low-Voltage SOT23 µP Supervisors

TOP VIEW

(RESET) MAX6827/MAX6830 ONLY

RESET IN FOR MAX6826/MAX6827/MAX6828 ONLY

CC2

FOR MAX6829/MAX6830/MAX6831 ONLY

RESET(RESET)

GND

________________________________________________________________ Maxim Integrated Products

with Manual Reset and Watchdog Timer

General Description

down to +1.0V.

SOT23-6

MAX6826–

MAX6831

Pin Configuration

Automotive Systems

Critical µP Monitoring

Multivoltage Systems

RESET IN/V

WDI

CC2

♦ Monitor Primary V

♦ User Adjustable RESET IN Down to +0.63V

♦ 140ms (min) Reset Timeout Delay

♦ 1.6s Watchdog Timeout Period

♦ Manual Reset Input

♦ Three Reset Output Options

♦ Guaranteed Reset Valid Down to V

♦ Immune to Short Negative V

♦ No External Components

♦ Small 6-pin SOT23 Packages

†

the blanks to complete the part number.

Devices are available in both leaded and lead-free packaging.

Specify lead-free by replacing “-T” with “+T” when ordering.

*Samples are typically available for standard versions only.

The MAX6826/MAX6827/MAX6828 require a 2.5k minimum

order increment for all versions. Contact factory for availability.

Standard Versions Table continued at end of data sheet.

MAX6826_UT-T

MAX6827_UT-T

MAX6828_UT-T

MAX6829_ _UT-T

MAX6830_ _UT-T

Insert the desired suffix letter (from Standard Versions table) into

M AX6831_ _UT-T

(MAX6826/MAX6827/MAX6828)

to +5.0V and Secondary V

from +0.9V to +2.5V

Push-Pull RESET

Open-Drain RESET

PART

†

MAX6826/MAX6827/MAX6828

Standard Versions Table*

-40°C to +125°C

Ordering Information

TEMP RANGE

Supplies from +1.8V

CC2

Transients

Supplies

PIN-PACKAGE

6 SOT23-6

Features

= +1.0V

Related parts for MAX6830VGUT-T

MAX6830VGUT-T Summary of contents

Page 1

... FOR MAX6829/MAX6830/MAX6831 ONLY CC2 Typical Operating Circuit, Threshold Suffix Guide, and Selector Guide appear at end of data sheet. ________________________________________________________________ Maxim Integrated Products 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. ♦ Monitor Primary ...

Page 2

Dual Ultra-Low-Voltage SOT23 µP Supervisors with Manual Reset and Watchdog Timer ABSOLUTE MAXIMUM RATINGS GND.................................................-0.3V to +6.0V CC CC2 Open-Drain RESET................................................-0.3V to +6.0V Push-Pull RESET, RESET............................-0. MR, WDI, RESET IN....................................-0. Input Current ...

Page 3

Dual Ultra-Low-Voltage SOT23 µP Supervisors with Manual Reset and Watchdog Timer ELECTRICAL CHARACTERISTICS (continued +4.5V to +5.5V for MAX68_ _L/ +1.53V to +2.0V for MAX68_ _W/ PARAMETER SYMBOL V Reset Threshold CC2 ...

Page 4

Page 5

Dual Ultra-Low-Voltage SOT23 µP Supervisors with Manual Reset and Watchdog Timer (T = +25°C, unless otherwise noted.) A SUPPLY CURRENT vs. TEMPERATURE +5V, L VERSION +3.3V, S VERSION CC ...

Page 6

Dual Ultra-Low-Voltage SOT23 µP Supervisors with Manual Reset and Watchdog Timer (T = +25°C, unless otherwise noted.) A VOLTAGE OUTPUT LOW vs. I 0.350 V = +2.9V CC 0.300 0.250 0.200 0.150 0.010 0.005 ...

Page 7

Dual Ultra-Low-Voltage SOT23 µP Supervisors with Manual Reset and Watchdog Timer PIN MAX MAX MAX MAX MAX MAX 6826 6827 6828 6829 6830 6831 RESET IN MR WDI ...

Page 8

Dual Ultra-Low-Voltage SOT23 µP Supervisors with Manual Reset and Watchdog Timer CC2 MR WDI Figure 2. Functional Diagram of V CC2 Detailed Description RESET /RESET Output A microprocessor’s (µP’s) reset input starts the µ known ...

Page 9

Dual Ultra-Low-Voltage SOT23 µP Supervisors with Manual Reset and Watchdog Timer RST RESET WDI *RESET IS THE INVERSE OF RESET. Figure 4. Watchdog Timing Relationship V MONITOR MAX6826 MAX6827 R1 MAX6828 RSTIN R2 ≥ V ...

Page 10

Dual Ultra-Low-Voltage SOT23 µP Supervisors with Manual Reset and Watchdog Timer directly to the microcontroller’s RESET pin with a single pullup resistor allows the device to assert a reset (Figure 6). Negative-Going V These supervisors are relatively immune to short-dura- ...

Page 11

Dual Ultra-Low-Voltage SOT23 µP Supervisors with Manual Reset and Watchdog Timer V THRESHOLD RESET THRESHOLD ( ACTIVE-LOW ACTIVE-HIGH FUNCTION RESET RESET ✔ MAX6826 MAX6827 — MAX6828 — ✔ MAX6829 MAX6830 ...

Page 12

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc ...

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