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MAX6808SA46+

P1-P3P4-P6P7-P9P10-P12P13-P13
General Description
The MAX6806/MAX6807/MAX6808 precision voltage
detectors are ideal for accurate monitoring of power
supplies in digital systems. They provide circuit reliabili-
ty and reduce total cost by eliminating external compo-
nents and adjustments.
The MAX6806/MAX6807/MAX6808 assert a reset signal
whenever the supply voltage (V
CC
) falls below the factory-
preset, ±2% accurate threshold. Internal hysteresis
ensures stable switching. The MAX6806/MAX6807/
MAX6808 are available in 4.6V and 2.6V thresholds (2.3V
is also available for the MAX6806 only). The MAX6806 fea-
tures an active-low, push-pull RESET output; the MAX6807
features an active-high, push-pull RESET output; and the
MAX6808 features an active-low, open-drain RESET out-
put. RESET is valid for V
CC
down to 1V (MAX6806/
MAX6808), and RESET (MAX6807) is guaranteed for V
CC
down to 1.2V.
The MAX6806/MAX6807/MAX6808 are available in
3-pin SC70, 3-pin SOT23, 8-pin µMAX, 8-pin SO, and 4-
pin SOT143 packages. The SOT143 package includes
a manual-reset input.
Applications
Computers Automotive
Controllers Bar-Code Scanners
Intelligent Instruments
Critical µP and µC Power Monitoring
Portable/Battery-Powered Equipment
Features
♦ Preset Reset Thresholds: 4.6V and 2.6V
(2.3V also available for MAX6806 only)
♦ ±2% Accurate Reset Thresholds
♦ Reset Output Available in Active-Low (MAX6806),
Active-High (MAX6807), and Open-Drain
(MAX6808) Versions
♦ Immune to Power-Supply Transients
♦ RESET Valid to V
CC
= 1.0V (MAX6806/MAX6808)
♦ 35µA Supply Current
♦ No External Components
♦ Manual Reset Available with 4-Pin SOT143
Package
♦ Miniature 3-Pin SC70, 3-Pin SOT23, and 4-Pin
SOT143 Packages
♦ 8 Lead µMAX and 8 Lead SO Packages are Pin
Compatible with the MC33064/MC33164/
MC34064/MC34164
MAX6806/MAX6807/MAX6808
Voltage Detectors
________________________________________________________________ Maxim Integrated Products 1
19-1421; Rev 2; 4/01
Ordering Information
Selector Guide and Pin Configurations appear at end of data
sheet.
* SOT23, SOT143, and SC70s are available in tape-and-reel
only, 2500 piece minimum order quantity.
Note: Insert the desired number from the Selector Guide into the
blank to complete the part number. Also see Selector Guide for
top mark for SOT23
PART TEMP. RANGE PIN-PACKAGE
MAX6806XR_ _ -T -40°C to +85°C 3 SC70
MAX6806UR_ _ -T -40°C to +85°C 3 SOT23
MAX6806US_ _ -T -40°C to +85°C 4 SOT143
MAX6806UA_ _ -40°C to +85°C 8 µMAX
MAX6806SA_ _ -40°C to +85°C 8 SO
MAX6807XR_ _ -T -40°C to +85°C 3 SC70
MAX6807UR_ _ -T -40°C to +85°C 3 SOT23
MAX6807US_ _ -T -40°C to +85°C 4 SOT143
MAX6807UA_ _ -40°C to +85°C 8 µMAX
MAX6807SA_ _ -40°C to +85°C 8 SO
MAX6808XR_ _ -T -40°C to +85°C 3 SC70
MAX6808UR_ _ -T -40°C to +85°C 3 SOT23
MAX6808US_ _ -T -40°C to +85°C 4 SOT143
MAX6808UA_ _ -40°C to +85°C 8 µMAX
MAX6808SA_ _ -40°C to +85°C 8 SO
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
MAX6806
MAX6807
MAX6808
V
CC
V
CC
V
CC
GND GND
µP
(RESET)/RESET
RESET
INPUT
( ) ARE FOR MAX6807
MAX6806/MAX6807/MAX6808
Voltage Detectors
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Note1: All devices are 100% production tested at T
A
= +25°C, and are guaranteed by design for T
A
= T
MIN
to T
MAX
, as specified.
Note 2: RESET output for MAX6806/MAX6808, RESET output for MAX6807.
V
CC
to GND ..........................................................-0.3V to +6.0V
RESET, RESET to GND
(MAX6806/MAX6807) ................................-0.3V to (V
CC
+ 0.3V)
RESET to GND (MAX6808)...................................-0.3V to + 6.0V
MR to GND (SOT143 package only) ....................-0.3V to + 6.0V
Input Current, V
CC
...........................................................±20mA
Output Current, RESET, RESET .......................................±20mA
Rate of Rise, V
CC
...........................................................100V/µs
Continuous Power Dissipation (T
A
= +70°C)
SOT23, SOT143 (derate 4mW/°C above +70°C) .........320mW
SC70 (derate 2.17mW/°C above +70°C) .....................174mW
µMAX (derate 4.5mW/°C above +70°C) ......................362mW
SO (derate 5.9mW/°C above +70°C) ...........................471mW
Operating Temperature Range ..........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°C
V
CC
= +3.6V, no load
V
CC
> V
TH+
T
A
= -40°C to +85°C
T
A
= 0°C to +70°C
V
CC
falling at 1mV/µs
I
SINK
= 1.0mA, V
CC
= 2.0V
I
SINK
= 3.2mA, V
CC
= 5.0V
I
SOURCE
= 400µA, V
CC
= 2.0V
I
SINK
= 20µA, V
CC
= 1.0V
T
A
= +25°C,
V
CC
falling
V
CC
= +5.5V, no load
I
SOURCE
= 20µA, V
CC
= 1.2V
CONDITIONS
V
0.7V
CC
V
IH
MR Input Threshold
0.6V
IL
kΩ40 80 120R
MR
MR Pull-Down Resistance
ppm/°C30Reset Threshold Tempco
µs30V
CC
to Reset Delay (Note 2)
0.4V
OL
RESET Output Voltage
(MAX6807)
V
0.8V
CC
V
OH
0.8V
CC
35 60
V
1.2 5.5
V
CC
1.0 5.5
Supply Voltage Range
V
OL
0.4
0.3
2.254 2.30 2.346
V
TH-
Reset Threshold
µA
50 80
I
CC
Supply Current
4.508 4.60 4.692
3.136 3.20 3.264
V
2.548 2.60 2.652
UNITSMIN TYP MAXSYMBOLPARAMETER
MAX680_ _ _46
MAX680_ _ _32
MAX680_ _ _26
V
OH
I
SOURCE
= 2.0mA, V
CC
= 5.0V
(MAX6806 only)
RESET Output Voltage
(MAX6806/MAX6808)
V
0.8V
CC
V
CC
= 5.5V, RESET deasserted
(MAX6808 only)
µA1I
OH
RESET Output Leakage Current
T
A
= +25°C, Figure 2 V
0.02 0.03
V
TH-
V
TH-
V
HYST
Reset Threshold Hysteresis
MAX680_ _ _23
MAX6806/MAX6807/MAX6808
Voltage Detectors
_______________________________________________________________________________________ 3
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
0
10
5
20
15
30
25
35
45
40
50
-60 -30 0 30 60 12090
SUPPLY CURRENT vs. TEMPERATURE
MAX6806/7/8-01
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
V
CC
= 5.0V
V
CC
= 3.3V
V
CC
= 1.8V
V
CC
= 1.0V
25
29
27
33
31
35
37
43
41
39
45
-60 -30-15 0-45 15 30 45 7560 90 105 120135
POWER-DOWN RESET DELAY
vs. TEMPERATURE
MAX6806/7/8toc02
TEMPERATURE (°C)
RESET DELAY (µs)
V
OD
= V
TH-
- V
CC
= 100mV
V
CC
FALLING AT 1mV/µS
4
6
5
7
9
8
11
10
12
-60 -30 0 30 60 12090
POWER-UP RESET DELAY vs. TEMPERATURE
MAX6806/7/8-03
TEMPERATURE (°C)
DELAY TIME (µs)
V
OD
= V
CC
- V
TH
+
V
OD
= 50mV
V
OD
= 200mV
V
OD
= 100mV
0.9900
0.9940
0.9920
0.9980
0.9960
1.0020
1.0000
1.0040
1.0080
1.0060
1.0100
-40 -15 0-30 15 30 6045 8575
NORMALIZED RESET THRESHOLD
vs. TEMPERATURE
MAX6806/7/8-04
TEMPERATURE (°C)
NORMALIZED RESET THRESHOLD
V
CC
RISING (V
TH+
)
V
CC
FALLING (V
TH-
)
1
Active-Low Reset Output (MAX6806/MAX6808). RESET remains low while V
CC
is below the reset-threshold voltage or while MR is held high.
Active-High Reset Output (MAX6807). RESET remains high while V
CC
is below
the reset-threshold voltage or while MR is held high.
2 Ground
3 Supply Voltage Input
— Active-High Manual Reset Input. Internal 80kΩ resistor to GND.
SOT23/SC70
FUNCTION
Pin Description
RESET
RESET
GND
V
CC
MR
NAME
1
4
3
2
SOT143
PIN
N.C.— Not Internally Connected— 3, 5–8
1
4
2
—
µMAX/SO
P1-P3P4-P6P7-P9P10-P12P13-P13

MAX6808SA46+

Mfr. #:
Buy MAX6808SA46+
Manufacturer:
Maxim Integrated
Description:
Supervisory Circuits Single uPower 4.6V
Lifecycle:
New from this manufacturer.
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