General Description

The MAX6800/MAX6801/MAX6802 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.

These devices perform a single function—they assert a

below a preset threshold, keeping it asserted for a preset

threshold. The only difference among the three devices

is their output. The MAX6801 (push/pull) and MAX6802

(open-drain) have an active-low RESET output, while the

MAX6800 (push/pull) has an active-high RESET output.

The MAX6800/MAX6801 are guaranteed to be in the cor-

The reset comparator in these ICs is designed to ignore

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 pulse

width. Ideal for space-critical applications, the

MAX6800/MAX6801/MAX6802 come packaged in a 3-

pin SOT23. For a lower threshold voltage version, see

the MAX6332/MAX6333/MAX6334.

Applications

Computers

Controllers

Intelligent Instruments

Critical µP/µC Power Monitoring

Portable/Battery-Powered Equipment

Automotive

Features

♦ Ultra-Low 0.7V Operating Supply Voltage

♦ Low 4.0µA Supply Current

♦ Precision Monitoring of 2.85V to 5.0V Power-

Supply Voltages

♦ Reset Thresholds Available from 2.63V to 4.80V,

in Approximately 100mV Increments

♦ Fully Specified over Temperature

♦ Three Power-On Reset Timeout Periods Available

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

♦ Low Cost

♦ Three Available Output Structures: Push/Pull

RESET, Push/Pull RESET, Open-Drain RESET

(MAX6800/MAX6801)

♦ Power-Supply Transient Immunity

♦ No External Components Required

♦ 3-Pin SOT23 Package

♦ Pin Compatible with MAX809/MAX810,

MAX6326/MAX6327/MAX6328, and

MAX6346/MAX6347/MAX6348

3-Pin, Low-Power

µP Reset Circuits

________________________________________________________________ Maxim Integrated Products

1

PART*

MAX6800UR_ _D_-T

MAX6801UR_ _D_-T

MAX6802UR_ _D_-T

-40°C to +125°C

-40°C to +125°C

-40°C to +125°C

TEMP RANGE

PIN-PACKAGE

3 SOT23-3

3 SOT23-3

3 SOT23-3

Ordering Information

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 “UR” 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.

Typical Operating Circuit and Pin Configuration appear

at end of data sheet.

Selector Guide appears at end of data sheet.

19-1933 Rev 2; 12/05

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.