MAX6804US31D3 Maxim Integrated Products, MAX6804US31D3 Datasheet

MAX6804US31D3

Manufacturer Part Number

MAX6804US31D3

Description

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX6804US31D3.pdf (8 pages)

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The MAX6803/MAX6804/MAX6805 microprocessor (µP)

supervisory circuits monitor the power supplies in 2.85V

to 5.0V µP and digital systems. They increase circuit

reliability and reduce cost by eliminating external com-

ponents and adjustments. They also feature a

debounced manual reset input.

These devices perform a single function: they assert a

reset signal whenever the V

below a preset threshold or whenever manual reset is

asserted. Reset remains asserted for a preset timeout

period after V

after manual reset is deasserted. The only difference

among the three devices is their output. The MAX6804

(push/pull) and MAX6805 (open-drain) have an active-

low RESET output, while the MAX6803 (push/pull) has

an active-high RESET output. The MAX6803/MAX6804

are guaranteed to be in the correct state for V

to 0.7V. The MAX6805 is guaranteed to be in the cor-

rect state for V

The reset comparator in these ICs is designed to ignore

fast transients on V

trimmable between 2.63V and 4.80V, in approximately

100mV increments. These devices are available with a

1ms min, 20ms min, or 100ms min reset timeout period.

Ideal for space-critical applications, the MAX6803/

MAX6804/MAX6805 come packaged in a 4-pin

SOT143. For a lower threshold voltage version, see the

MAX6335/MAX6336/MAX6337.

19-1946; Rev 2; 12/05

Typical Operating Circuit and Pin Configuration appear

at end of data sheet.

Selector Guide appears at end of data sheet.

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.

Computers

Controllers

Intelligent Instruments

Critical µP/µC Power Monitoring

Portable/Battery-Powered Equipment

Automotive

has risen above the reset threshold or

________________________________________________________________ Maxim Integrated Products

down to 1.0V.

. Reset thresholds are factory-

General Description

µP Reset Circuits with Manual Reset

supply voltage declines

Applications

down

♦ Ultra-Low 0.7V Operating Supply Voltage

♦ Low 4.0µA Supply Current

♦ Precision Monitoring of 2.85V to 5.0V Power-

♦ Reset Thresholds Available from 2.63V to 4.80V,

♦ Debounced Manual Reset Input

♦ Fully Specified over Temperature

♦ Three Power-On Reset Timeout Periods Available

♦ Low Cost

♦ Three Available Output Structures: Push/Pull

♦ Guaranteed RESET/RESET Valid to V

♦ Power-Supply Transient Immunity

♦ No External Components Required

♦ 4-Pin SOT143 Package

♦ Pin Compatible with MAX811/MAX812 and

*These devices are available in factory-set V

olds from 2.63V to 4.80V, in approximately 0.1V increments.

Choose the desired reset threshold suffix from Table 1 and

insert it in the blanks following “US” in the part number.

Factory-programmed reset timeout periods are also available.

Insert the number corresponding to the desired nominal reset

timeout period (1 = 1ms min, 2 = 20ms min, 3 = 100ms min) in

the blank following “D” in the part number. There are 15 stan-

dard versions with a required order increment of 2500 pieces.

Sample stock is generally held on the standard versions only

(see Selector Guide). Contact the factory for availability of non-

standard versions (required order increment is 10,000 pieces).

All devices available in tape-and-reel only.

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

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

MAX6803US_ _D_-T

MAX6804US_ _D_-T

MAX6805US_ _D_-T

Supply Voltages

in Approximately 100mV Increments

(1ms min, 20ms min, 100ms min)

RESET, Push/Pull RESET, Open-Drain RESET

(MAX6803/MAX6804)

MAX6314/MAX6315

PART*

4-Pin, Low-Power

-40°C to +125°C

TEMP RANGE

Ordering Information

4 SOT143

PIN-PACKAGE

Features

reset thresh-

= 0.7V

Related parts for MAX6804US31D3

MAX6804US31D3 Summary of contents

Page 1

... Typical Operating Circuit and Pin Configuration appear at end of data sheet. Selector Guide appears 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. ♦ Ultra-Low 0.7V Operating Supply Voltage ♦ ...

Page 2

Low-Power µP Reset Circuits with Manual Reset ABSOLUTE MAXIMUM RATINGS Terminal Voltage (with respect to GND) V ......................................................................-0.3V to +6V CC Push/Pull RESET or RESET, MR ............-0. Open-Drain RESET ..............................................-0.3V to +6V Input Current (V ) .............................................................20mA ...

Page 3

Reset Circuits with Manual Reset ELECTRICAL CHARACTERISTICS (continued full range -40°C to +125°C, unless otherwise noted. Typical values are asserted.) (Note 1) PARAMETER SYMBOL RESET Output Voltage (MAX6803) RESET Output Leakage ...

Page 4

Low-Power µP Reset Circuits with Manual Reset PIN MAX6804 MAX6803 MAX6805 1 1 — — Applications Information Manual Reset Input Many µP-based products require manual reset capabil- ity, allowing the operator, a test ...

Page 5

Reset Circuits with Manual Reset µPs and circuitry do not operate when V 1V. For the MAX6804 application where RESET must be valid down to 0, adding a pulldown resistor between RESET and GND removes stray leakage currents, hold- ...

Page 6

Low-Power µP Reset Circuits with Manual Reset Table 1. Factory-Trimmed Reset Thresholds RESET THRESHOLD SUFFIX MIN 48 4.714 47 4.615 46 4.547 45 4.419 44 4.301 43 4.223 42 4.124 41 4.026 40 3.928 39 4.830 38 3.732 37 ...

Page 7

... MAX6803US29D3-T Push/Pull RESET MAX6803US31D3-T Push/Pull RESET MAX6803US44D3-T Push/Pull RESET MAX6803US46D3-T Push/Pull RESET Push/Pull RESET MAX6804US26D3-T Push/Pull RESET MAX6804US29D3-T Push/Pull RESET MAX6804US31D3-T Push/Pull RESET MAX6804US44D3-T Push/Pull RESET MAX6804US46D3-T Open-Drain RESET MAX6805US26D3-T Open-Drain RESET MAX6805US29D3-T Open-Drain RESET MAX6805US31D3-T Open-Drain RESET MAX6805US44D3-T Open-Drain RESET MAX6805US46D3-T *Sample stock is generally held on all standard versions ...

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 © 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc ...

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