MAX6802 MAXIM [Maxim Integrated Products], MAX6802 Datasheet

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MAX6802

Manufacturer Part Number
MAX6802
Description
3-Pin, Low-Power uP Reset Circuits
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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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
reset signal whenever the V
below a preset threshold, keeping it asserted for a preset
timeout period after V
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-
rect state for V
teed to be in the correct 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 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.
19-1933; Rev 3; 10/11
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 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
CC
down to 0.7V. The MAX6802 is guaran-
________________________________________________________________ Maxim Integrated Products
CC
. Reset thresholds are factory-
General Description
CC
has risen above the reset
CC
supply voltage declines
CC
Applications
down to 1.0V.
o Ultra-Low 0.7V Operating Supply Voltage
o Low 4.0µA Supply Current
o Precision Monitoring of 2.85V to 5.0V Power-
o Reset Thresholds Available from 2.63V to 4.80V,
o Fully Specified over Temperature
o Three Power-On Reset Timeout Periods Available
o Low Cost
o Three Available Output Structures: Push/Pull
o Guaranteed RESET/RESET Valid to V
o Power-Supply Transient Immunity
o No External Components Required
o 3-Pin SOT23 Package
o Pin Compatible with MAX809/MAX810,
* 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 “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.
/V Denotes an automotive-qualified part.
MAX6800UR_ _D_-T
MAX6800UR_ _D_/V-T
MAX6801UR_ _D_-T
MAX6801UR_ _ D_/V-T
MAX6802UR_ _D_-T
MAX6802UR_ _ D_/V-T
Supply Voltages
in Approximately 100mV Increments
(1ms min, 20ms min, 100ms min)
RESET, Push/Pull RESET, Open-Drain RESET
(MAX6800/MAX6801)
MAX6326/MAX6327/MAX6328, and
MAX6346/MAX6347/MAX6348
PART
µP Reset Circuits
3-Pin, Low-Power
Ordering Information
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
TEMP RANGE
CC
Features
PIN- PA CK A G E
3 SOT23
3 SOT23
3 SOT23
3 SOT23
3 SOT23
3 SOT23
CC
reset thresh-
= 0.7V
1

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MAX6802 Summary of contents

Page 1

... V has risen above the reset CC 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 the cor- rect state for V down to 0 ...

Page 2

... CC ≥ 2.5V 0.3 CC ≥ 4.25V 0.4 CC ≥ 3.0V 0 ≥ 5.0V 0 ≥ 1.0V 0 ≥ 1.8V 0 ≥ 4.25V 0 ≥ 3.0V 0.3 ≥ 5.0V 0.4 0.5 for the MAX6802 is 50µA. UNITS V µA V µ µA ...

Page 3

... Active-Low Reset Output. RESET is asserted while V threshold and remains asserted for a reset timeout period (t RESET rises above the reset threshold. RESET on the MAX6801 is push/pull. RESET on the MAX6802 is open-drain. Active-High Reset Output. RESET is asserted while V RESET threshold and remains asserted for a reset timeout period (t rises above the reset threshold ...

Page 4

... Low-Power µP Reset Circuits Applications Information Interfacing to µPs with Bidirectional Since the RESET output on the MAX6802 is open-drain, this device interfaces easily with µPs that have bidirec- tional reset pins, such as the Motorola 68HC11. Connecting the µP supervisor’s RESET output directly to the microcontroller’ ...

Page 5

... CC V will hold RESET high when V CC (Figure 2b). Since the MAX6802 has an open-drain, active-low out- put, it typically uses a pullup resistor. With this device, RESET will most likely not maintain an active condition, drops CC but will drift to a non-active level due to the pullup resistor and the reduced sinking capability of the open- drain device ...

Page 6

... MAX6801UR44D3-T Push/Pull RESET MAX6801UR46D3-T Open-Drain RESET MAX6802UR26D3-T Open-Drain RESET MAX6802UR29D3-T Open-Drain RESET MAX6802UR31D3-T Open-Drain RESET MAX6802UR44D3-T Open-Drain RESET MAX6802UR46D3-T * Sample stock is generally held on all standard versions. Chip Information PROCESS: BiCMOS 6 _______________________________________________________________________________________ Selector Guide (Standard Versions * ) MIN RESET NOMINAL V (V) TH TIMEOUT (ms) 2 ...

Page 7

REVISION REVISION NUMBER DATE 3 10/11 Added automotive-qualified part information to Ordering Information. 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 ...

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