MAX803SEXR+T Maxim Integrated Products, MAX803SEXR+T Datasheet

MAX803SEXR+T

Manufacturer Part Number

MAX803SEXR+T

Description

IC MPU/RESET CIRC SC70-3

Manufacturer

Maxim Integrated Products

Type

Simple Reset/Power-On Resetr

Datasheet

1.MAX809REURT.pdf (8 pages)

Specifications of MAX803SEXR+T

Number Of Voltages Monitored

Output

Open Drain or Open Collector

Reset

Active Low

Reset Timeout

140 ms Minimum

Voltage - Threshold

2.93V

Operating Temperature

-40°C ~ 125°C

Mounting Type

Surface Mount

Package / Case

SC-70-3, SOT-323-3

Monitored Voltage

2.5 V or 3 V or 3.3 V or 5 V

Undervoltage Threshold

2.89 V

Overvoltage Threshold

2.96 V

Manual Reset

Watchdog

Battery Backup Switching

Power-up Reset Delay (typ)

240 ms (Typ)

Supply Voltage (max)

5.5 V

Supply Voltage (min)

1.2 V

Supply Current (typ)

17 uA (Typ)

Maximum Power Dissipation

174 mW

Mounting Style

SMD/SMT

Maximum Operating Temperature

+ 125 C

Chip Enable Signals

Minimum Operating Temperature

- 40 C

Output Type

Active Low or Open Drain

Power Fail Detection

09+

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Other names

MAX803SEXR+TTR

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The MAX803/MAX809/MAX810 are microprocessor (µP)

supervisory circuits used to monitor the power supplies

in µP and digital systems. They provide excellent circuit

reliability and low cost by eliminating external compo-

nents and adjustments when used with +5V, +3.3V,

+3.0V, or +2.5V powered circuits.

These circuits perform a single function: they assert a

reset signal whenever the V

below a preset threshold, keeping it asserted for at

least 140ms after V

old. Reset thresholds suitable for operation with a vari-

ety of supply voltages are available.

The MAX803 has an open-drain output stage, while the

MAX809/MAX810 have push-pull outputs. The

MAX803’s open-drain RESET output requires a pullup

resistor that can be connected to a voltage higher than

output, while the MAX810 has an active-high RESET

output. The reset comparator is designed to ignore fast

transients on V

be in the correct logic state for V

Low supply current makes the MAX803/MAX809/

MAX810 ideal for use in portable equipment. The

MAX803 is available in a 3-pin SC70 package, and the

MAX809/MAX810 are available in 3-pin SC70 or SOT23

packages.

19-0344; Rev 7; 2/10

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.

. The MAX803/MAX809 have an active-low RESET

*MAX803 ONLY

Computers

Controllers

Intelligent Instruments

Critical µP and µC Power Monitoring

Portable/Battery-Powered Equipment

Automotive

MAX803

MAX809

Typical Operating Circuit

GND

________________________________________________________________ Maxim Integrated Products

, and the outputs are guaranteed to

RESET

has risen above the reset thresh-

General Description

3-Pin Microprocessor Reset Circuits

PULLUP

supply voltage declines

Applications

down to 1V.

RESET

INPUT

GND

μP

♦ ♦ Precision Monitoring of +2.5V, +3V, +3.3V, and

♦ ♦ Fully Specified Over Temperature

♦ ♦ Available in Three Output Configurations

♦ ♦ 140ms min Power-On Reset Pulse Width

♦ ♦ 12µA Supply Current

♦ ♦ Guaranteed Reset Valid to V

♦ ♦ Power Supply Transient Immunity

♦ ♦ No External Components

♦ ♦ 3-Pin SC70 and SOT23 Packages

____________________________Features

Note: These parts are offered in 2.5k reels, and must be

ordered in 2.5k increments. Insert the desired suffix letter from

the Selector Guide into the blank to complete the part number.

All versions of these products may not be available at the time

of announcement. Contact factory for availability.

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

+ Denotes a lead(Pb)-free/RoHS-compliant package.

MAX803_EXR-T

MAX803_EXR+T

MAX809_EXR-T

MAX809_EXR+T

MAX809_EUR-T

MAX809_EUR+T

MAX810_EXR-T

MAX810_EXR+T

MAX810_EUR-T

MAX810_EUR+T

+5V Power-Supply Voltages

Open-Drain RESET Output (MAX803)

Push-Pull RESET Output (MAX809)

Push-Pull RESET Output (MAX810)

( ) ARE FOR MAX810.

MAX803 AVAILABLE IN SC70-3 ONLY.

TOP VIEW

PART

RESET (RESET)

GND

-40°C to +125°C

-40°C to +105°C

-40°C to +125°C

-40°C to +105°C

TEMP RANGE

Ordering Information

SC70-3/SOT23-3

MAX803

MAX809

MAX810

Pin Configuration

= +1V

3 SC70

3 SOT23

3 SC70

3 SOT23

PIN-PACKAGE

Related parts for MAX803SEXR+T

MAX803SEXR+T Summary of contents

Page 1

... PULLUP MAX803 MAX809 RESET GND *MAX803 ONLY ________________________________________________________________ Maxim Integrated Products 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. ____________________________Features ♦ ♦ Precision Monitoring of +2.5V, +3V, +3.3V, and +5V Power-Supply Voltages ♦ ♦ Fully Specified Over Temperature ♦ ...

Page 2

Microprocessor Reset Circuits ABSOLUTE MAXIMUM RATINGS Terminal Voltage (with respect to GND) V ....................................................................-0.3V to +6.0V CC RESET, RESET (push-pull) .....................-0. RESET (open drain)...........................................-0.3V to +6.0V Input Current, V ..............................................................20mA CC Output Current, RESET, RESET ..........................................20mA Rate ...

Page 3

Microprocessor Reset Circuits ELECTRICAL CHARACTERISTICS (continued full range -40°C to +105°C (SOT23 +25° for L/M/J versions PARAMETER SYMBOL Reset Threshold (SC70 only) Reset Threshold Tempco ...

Page 4

Microprocessor Reset Circuits ELECTRICAL CHARACTERISTICS (continued full range -40°C to +105°C (SOT23 +25° for L/M/J versions PARAMETER SYMBOL RESET Output Voltage High (push-pull active high, ...

Page 5

Microprocessor Reset Circuits PART/SUFFIX RESET THRESHOLD (V) MAX803L 4.63 MAX803M 4.38 MAX803T 3.08 MAX803S 2.93 MAX803R 2.63 MAX803Z 2.32 MAX809L 4.63 MAX809M 4.38 MAX809J 4.00 MAX809T 3.08 MAX809S 2.93 MAX809R 2.63 MAX809Z 2.32 MAX810L 4.63 MAX810M 4.38 MAX810T 3.08 ...

Page 6

Microprocessor Reset Circuits Therefore, high-impedance CMOS logic inputs con- nected to RESET can drift to undetermined voltages. This presents no problem in most applications since most µP and other circuitry is inoperative with V below 1V. However, in applications ...

Page 7

Microprocessor Reset Circuits below 1V, so does the IC’s ability to sink current at RESET. Also, with any pullup, RESET will be pulled high as V decays toward 0. The voltage where this occurs CC depends on the pullup ...

Page 8

... 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. 8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2010 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...

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