General Description
The MAX6375–MAX6380 are ultra-low-power circuits
used for monitoring battery, power-supply, and regulat-
ed system voltages. Each detector contains a precision
bandgap reference, comparator, and internally trimmed
resistors that set specified trip threshold voltages.
These devices provide excellent circuit reliability and
low cost by eliminating external components and
adjustments when monitoring nominal system voltages
from 2.5V to 5V.
These circuits perform a single function: they assert an
output signal whenever the V
CC
supply voltage falls
below a preset threshold. The devices are differentiated
by their output logic configurations and preset thresh-
old voltages. The MAX6375/MAX6378 (push-pull) and
MAX6377/MAX6380 (open-drain) have an active-low
output (OUT is logic low when V
CC
is below V
TH
). The
MAX6376/MAX6379 have an active-high push-pull out-
put (OUT is logic high when V
CC
is below V
TH
). All
parts are guaranteed to be in the correct output logic
state for V
CC
down to 1V. The detector is designed to
ignore fast transients on V
CC
. The MAX6375/MAX6376/
MAX6377 have voltage thresholds between 2.20V and
3.08V in approximately 100mV increments. The
MAX6378/MAX6379/MAX6380 have voltage thresholds
between 3.30V and 4.63V in approximately 100mV
increments.
Ultra-low supply current of 500nA (MAX6375/MAX6376/
MAX6377) makes these parts ideal for use in portable
equipment. All six devices are available in a space-sav-
ing SC70 package or in a tiny SOT23 package.
Applications
Precision Battery Monitoring
Load Switching/Power Sequencing
Power-Supply Monitoring in Digital/Analog Systems
Portable/Battery-Powered Equipment
Features
o Ultra-Low 500nA Supply Current
(MAX6375/MAX6376/MAX6377)
o Thresholds Available from 2.20V to 4.63V in
Approximately 100mV Increments
o ±2.5% Threshold Accuracy Over Temperature
o Low Cost
o Available in Three Versions: Push-Pull OUT,
Push-Pull OUT, and Open-Drain OUT
o Power-Supply Transient Immunity
o No External Components
o Available in Either a 3-Pin SC70
or 3-Pin SOT23 Package
MAX6375–MAX6380
3-Pin, Ultra-Low-Power SC70/SOT23
Voltage Detectors
________________________________________________________________ Maxim Integrated Products
1
( ) ARE FOR MAX6376/MAX6379 ONLY.
TOP VIEW
OUT(OUT)
1
3
GND
SC70-3
2
GND
1
3
SOT23-3
2
V
CC
MAX6375XR–
MAX6380XR
MAX6375UR–
MAX6380UR
V
CC
OUT(OUT)
Pin Configuration
19-1721; Rev 2; 2/03
*
The MAX6375/MAX6376/MAX6377 are available in factory-pre-
set thresholds from 2.20V to 3.08V, in approximately 0.1V incre-
ments. The MAX6378/MAX6379/MAX6380 are available in
factory-preset thresholds from 3.30V to 4.63V, in approximately
0.1V increments. Choose the desired threshold suffix from
Table 1 and insert it in the blank spaces following R. There are
21 standard versions, with a required order increment of 2500
pieces. Sample stock is generally held on the standard versions
only (see the Selector Guide). The required order increment is
10,000 pieces for nonstandard versions (Table 2). Contact facto-
ry for availability. All devices available in tape-and-reel only.
Ordering Information
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.
PART*
TEMP RANGE
PIN-PACKAGE
MAX6375UR _ _ -T
-40°C to +85°C
3 SOT23-3
MAX6375XR _ _ -T
-40°C to +85°C
3 SC70-3
MAX6376UR _ _ -T
-40°C to +85°C
3 SOT23-3
MAX6376XR _ _ -T
-40°C to +85°C
3 SC70-3
Ordering information continued at end of data sheet
MAX6375–MAX6380
3-Pin, Ultra-Low-Power SC70/SOT23
Voltage Detectors
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= full range, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C and V
CC
= 3V.) (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.
Terminal Voltage (with respect to GND)
V
CC
...........................................................................-0.3V to +6V
OUT, OUT (push-pull) ................................-0.3V to (V
CC
+ 0.3V)
OUT (open-drain) .....................................................-0.3V to +6V
Input Current (V
CC
) .............................................................20mA
Output Current (OUT, OUT) ................................................20mA
Continuous Power Dissipation (T
A
= +70°C)
3-Pin SC70 (derate 2.17mW/°C above +70°C) ...........174mW
3-Pin SOT23 (derate 4mW/°C above +70°C)..............320mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1: Production tested at +25°C only. Overtemperature limits are guaranteed by design, not production tested.
42
V
CC
= (V
TH
- 100mV) to (V
TH
+ 100mV)
I
SINK
= 100µA, V
CC
≥ 1.2V, OUT asserted
0.4
V
OL
OUT Output Voltage
(MAX6375/MAX6377/
MAX6378/MAX6380)
I
SINK
= 1.6mA, V
CC
> 2.1V, OUT asserted
0.3
V
MAX6375/76/77 only, V
CC
= 3.0V for V
TH
≤ 2.93V,
V
CC
= 3.2V for V
TH
> 2.93V, no load
I
SOURCE
= 500µA, V
CC
= 3.2V, MAX6375 only
V
OH
I
SOURCE
= 800µA, V
CC
= 4.5V, V
TH
≤ 4.38V
OUT Output Voltage
(MAX6375/MAX6377)
I
SOURCE
= 800µA, V
CC
= V
TH(MAX)
, V
TH
≥ 4.5V
V
T
A
= -40°C to +85°C
T
A
= 0°C to +70°C
CONDITIONS
ppm/°C
40
∆V
TH
/°C
Voltage Threshold Tempco
V
V
CC
Operating Range
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
V
CC
= (V
TH
+ 100mV) to (V
TH
- 100mV)
µs
20
Propagation Delay
MAX6375/MAX6376/MAX6377
6.3
MAX6378/MAX6379/MAX6380
9.5
mV
Voltage Threshold
Hysteresis
0.1
µA
Open-Drain OUT Output
Leakage Current
0.8
✕
V
CC
0.8
✕
V
CC
0.8
✕
V
CC
1.0
5.5
1.2
5.5
T
A
= -40°C to +85°C
T
A
= +25°C
Table 1
V
TH
- 2.5% V
TH
V
TH
+ 2.5%
V
TH
V
V
TH
- 1.5% V
TH
V
TH
+ 1.5%
Voltage Threshold
V
CC
= 5.5V, no load
I
CC
Supply Current
0.5
1.0
µA
1.0
1.75
I
SOURCE
= 500µA, V
CC
≥ 2.1V, OUT asserted
0.8
✕
V
CC
0.8
✕
V
CC
I
SINK
= 1.2mA, V
CC
≥ 3.2V, OUT not asserted,
MAX6376 only
0.3
I
SOURCE
= 50µA, V
CC
≥ 1.2V, OUT asserted
V
OH
V
I
SINK
= 3.2mA, V
CC
≥ 4.5V, OUT not asserted,
V
TH
≤ 4.38V
0.4
I
SINK
= 3.2mA, V
CC
= V
TH(MAX)
, V
TH
≥ 4.5V
0.4
V
OL
OUT Output Voltage
(MAX6376/MAX6379)
MAX6375–MAX6380
3-Pin, Ultra-Low-Power SC70/SOT23
Voltage Detectors
______________________________________________________________________________________
3
__________________________________________Typical Operating Characteristics
(V
CC
= 5V, T
A
= +25°C, unless otherwise noted.)
0
0.3
0.2
0.1
0.4
0.5
0.6
0.7
0.8
0.9
1.0
-40
0
-20
20
40
60
80
SUPPLY CURRENT vs. TEMPERATURE
MAX6375-01
TEMPERATURE (
°C)
SUPPLY CURRENT (
µ
A)
V
CC
= 3.3V
V
CC
= 5V
V
CC
= 1.2V
0
50
100
150
200
-40
0
-20
20
40
60
80
PROPAGATION DELAY (FALLING)
vs. TEMPERATURE
MAX6375-02
TEMPERATURE (°C)
PROPAGATION DELAY (
µ
s)
V
OD
= 200mV
V
OD
= 10mV
V
OD
= 100mV
V
OD
= 20mV
0
40
20
80
60
120
100
140
-40
0
20
-20
40
60
80
PROPAGATION DELAY (RISING)
vs. TEMPERATURE
MAX6375-03
TEMPERATURE (
°C)
PROPAGATION DELAY (
µ
s)
V
OD
= 10mV
V
OD
= 20mV
V
OD
= 100mV
V
OD
= 200mV
500
0
1
100
1000
MAXIMUM TRANSIENT DURATION
vs. THRESHOLD OVERDRIVE
100
300
400
200
MAX6375-04
THRESHOLD OVERDRIVE
V
TH
- V
CC
(mV)
MAXIMUM TRANSIENT DURATION (
µ
s)
10
OUT/OUT IS ASSERTED
ABOVE LINE
Pin Description
PIN
MAX6375/MAX6377/
MAX6378/MAX6380
MAX6376/MAX6379
SC70-3
SOT23-3
SC70-3
SOT23-3
NAME
FUNCTION
1
2
1
2
GND
Ground
2
1
—
—
OUT
Active-Low Output. OUT remains low while V
CC
is below the threshold.
OUT is open-drain on the MAX6377/MAX6380 and push-pull on the
MAX6375/MAX6378.
—
—
2
1
OUT
Active-High Output. OUT remains high while V
CC
is below the
threshold.
3
3
3
3
V
CC
Supply Voltage
MAX6375–MAX6380
3-Pin, Ultra-Low-Power SC70/SOT23
Voltage Detectors
4
_______________________________________________________________________________________
____________ Applications Information
Interfacing to Different
Logic Voltage Components
The MAX6377/MAX6380 have an active-low, open-
drain output. This output structure sinks current when
OUT is asserted. Connect a pullup resistor from OUT to
any supply voltage up to 5.50V (Figure 1). Select a
resistor value large enough to allow a valid logic low
(see Electrical Characteristics), and small enough to
register a logic high while supplying all input current
and leakage paths connected to the OUT line.
Negative-Going V
CC
Transients
These devices are relatively immune to short-duration,
negative-going V
CC
transients (glitches). The Typical
Operating Characteristics show the Maximum Transient
Duration vs. Threshold Overdrive graph, for which out-
put pulses are not generated. The graph shows the
maximum pulse width that a negative-going V
CC
tran-
sient may typically have before the devices issue out-
put signals. As the amplitude of the transient increases,
the maximum-allowable pulse width decreases.
Figure 1. Interfacing to Different Logic Voltage Components
Table 1. Factory-Trimmed Reset Thresholds
‡
‡
Factory-trimmed reset thresholds are available in approximately 100mV increments with a 1.5% room-temperature variance.
OUT
SUSPEND
µP
V
IN
V
CC
V
OUT
3.6V
Li+
REGULATED
3.0V
V
CC
DC/DC
CONVERTER
(OPEN-DRAIN)
MAX6377
RESET THRESHOLD VOLTAGE, V
TH
(V)
T
A
= +25°C
T
A
= -40°C TO +85°C
PART
SUFFIX
MIN
TYP
MAX
MIN
MAX
22
2.167
2.200
2.233
2.145
2.250
23
2.285
2.320
2.355
2.262
2.375
24
2.364
2.400
2.436
2.340
2.460
25
2.462
2.500
2.537
2.437
2.562
26
2.591
2.630
2.669
2.564
2.696
27
2.660
2.700
2.741
2.633
2.768
28
2.758
2.800
2.842
2.730
2.870
29
2.886
2.930
2.974
2.857
3.000
30
2.955
3.000
3.045
2.925
3.075
MAX6375_R
MAX6376_R
MAX6377_R
31
3.034
3.080
3.126
3.003
3.150
3-Pin, Ultra-Low-Power SC70/SOT23
Voltage Detectors
_______________________________________________________________________________________
5
Table 1. Factory-Trimmed Reset Thresholds
‡
(continued)
‡
Factory-trimmed reset thresholds are available in approximately 100mV increments with a 1.5% room-temperature variance.
Table 2. Device Marking Codes and Minimum Order Increments
RESET THRESHOLD VOLTAGE, V
TH
(V)
T
A
= +25°C
T
A
= -40°C TO +85°C
PART
SUFFIX
MIN
TYP
MAX
MIN
MAX
33
3.250
3.300
3.350
3.217
3.383
34
3.349
3.400
3.451
3.315
3.485
35
3.447
3.500
3.552
3.412
3.587
36
3.546
3.600
3.654
3.510
3.690
37
3.644
3.700
3.755
3.607
3.792
38
3.743
3.800
3.857
3.705
3.895
39
3.841
3.900
3.958
3.802
3.997
40
3.940
4.000
4.060
3.900
4.100
41
4.038
4.100
4.161
3.997
4.202
42
4.137
4.200
4.263
4.095
4.305
43
4.235
4.300
4.364
4.192
4.407
44
4.314
4.380
4.446
4.270
4.489
45
4.432
4.500
4.567
4.387
4.612
MAX6378_R
MAX6379_R
MAX6380_R
46
4.560
4.630
4.699
4.514
4.746
PART
TOP MARK
(SC70)
TOP MARK
(SOT23)
ORDER
INCREMENT (k)
MAX6375_R22-T
ADH
FZHD
2.5
MAX6375_R23-T
ADI
FZHE
2.5
MAX6375_R24-T
—
—
10
MAX6375_R25-T
—
—
10
MAX6375_R26-T
ACZ
FZHC
2.5
MAX6375_R27-T
—
—
10
MAX6375_R28-T
—
—
10
MAX6375_R29-T
ADJ
FZHF
2.5
MAX6375_R30-T
—
—
10
MAX6375_R31-T
ADK
FZHG
2.5
MAX6376_R22-T
ADL
FZHH
2.5
MAX6376_R23-T
ADM
FZHI
2.5
MAX6376_R24-T
—
—
10
MAX6376_R25-T
—
—
10
MAX6376_R26-T
ADN
FZHJ
2.5
MAX6376_R27-T
—
—
10
MAX6376_R28-T
—
—
10
MAX6376_R29-T
ADA
FZHK
2.5
PART
TOP MARK
(SC70)
TOP MARK
(SOT23)
ORDER
INCREMENT (k)
MAX6376_R30-T
—
—
10
MAX6376_R31-T
ADO
FZHL
2.5
MAX6377_R22-T
ADP
FZHM
2.5
MAX6377_R23-T
ADB
FZHN
2.5
MAX6377_R24-T
—
—
10
MAX6377_R25-T
—
—
10
MAX6377_R26-T
ACQ
FZHO
2.5
MAX6377_R27-T
—
—
10
MAX6377_R28-T
—
—
10
MAX6377_R29-T
ADC
FZHP
2.5
MAX6377_R30-T
—
—
10
MAX6377_R31-T
ADR
FZHQ
2.5
MAX6378_R33-T
—
—
10
MAX6378_R34-T
—
—
10
MAX6378_R35-T
—
—
10
MAX6378_R36-T
—
—
10
MAX6378_R37-T
—
—
10
MAX6378_R38-T
—
—
10
MAX6375–MAX6380
MAX6375–MAX6380
3-Pin, Ultra-Low-Power SC70/SOT23
Voltage Detectors
6
_______________________________________________________________________________________
___________________Chip Information
TRANSISTOR COUNT: 419
Table 2. Device Marking Codes and Minimum Order Increments (continued)
Selector Guide
(Standard Versions**)
**Sample stock is generally held on all standard versions.
Contact factory for availability of nonstandard versions.
PART
TOP MARK
(SC70)
TOP MARK
(SOT23)
ORDER
INCREMENT (k)
MAX6378_R39-T
—
—
10
MAX6378_R40-T
—
—
10
MAX6378_R41-T
—
—
10
MAX6378_R42-T
—
—
10
MAX6378_R43-T
—
—
10
MAX6378_R44-T
ADS
FZHU
2.5
MAX6378_R45-T
—
—
10
MAX6378_R46-T
ADD
FZHV
2.5
MAX6379_R33-T
—
—
10
MAX6379_R34-T
—
—
10
MAX6379_R35-T
—
—
10
MAX6379_R36-T
—
—
10
MAX6379_R37-T
—
—
10
MAX6379_R38-T
—
—
10
MAX6379_R39-T
—
—
10
MAX6379_R40-T
—
—
10
MAX6379_R41-T
—
—
10
MAX6379_R42-T
—
—
10
PART
TOP MARK
(SC70)
TOP MARK
(SOT23)
ORDER
INCREMENT (k)
MAX6379_R43-T
—
—
10
MAX6379_R44-T
ADE
FZHW
2.5
MAX6379_R45-T
—
—
10
MAX6379_R46-T
ADT
FZHX
2.5
MAX6380_R33-T
—
—
10
MAX6380_R34-T
—
—
10
MAX6380_R35-T
—
—
10
MAX6380_R36-T
—
—
10
MAX6380_R37-T
—
—
10
MAX6380_R38-T
—
—
10
MAX6380_R39-T
—
—
10
MAX6380_R40-T
—
—
10
MAX6380_R41-T
—
—
10
MAX6380_R42-T
—
—
10
MAX6380_R43-T
—
—
10
MAX6380_R44-T
ADU
FZHY
2.5
MAX6380_R45-T
—
—
10
MAX6380_R46-T
ADF
FZHZ
2.5
PART
NOMINAL V
TH
(V)
MAX63 _ _ _ R46-T
4.63
MAX63 _ _ _ R44-T
4.38
MAX63 _ _ _ R31-T
3.08
MAX63 _ _ _ R29-T
2.93
MAX63 _ _ _ R26-T
2.63
MAX63 _ _ _ R23-T
2.32
MAX63 _ _ _ R22-T
2.20
Ordering Information (continued)
PART*
TEMP RANGE
PIN-PACKAGE
MAX6377UR _ _ -T
-40°C to +85°C
3 SOT23-3
MAX6377XR _ _ -T
-40°C to +85°C
3 SC70-3
MAX6378UR _ _ -T
-40°C to +85°C
3 SOT23-3
MAX6378XR _ _ -T
-40°C to +85°C
3 SC70-3
MAX6379UR _ _ -T
-40°C to +85°C
3 SOT23-3
MAX6379XR _ _ -T
-40°C to +85°C
3 SC70-3
MAX6380UR _ _ -T
-40°C to +85°C
3 SOT23-3
MAX6380XR _ _ -T
-40°C to +85°C
3 SC70-3
*
The MAX6375/MAX6376/MAX6377 are available in factory-pre-
set thresholds from 2.20V to 3.08V, in approximately 0.1V incre-
ments. The MAX6378/MAX6379/MAX6380 are available in
factory-preset thresholds from 3.30V to 4.63V, in approximately
0.1V increments. Choose the desired threshold suffix from Table
1 and insert it in the blank spaces following R. There are 21 stan-
dard versions, with a required order increment of 2500 pieces.
Sample stock is generally held on the standard versions only
(see the Selector Guide). The required order increment is 10,000
pieces for nonstandard versions (Table 2). Contact factory for
availability. All devices available in tape-and-reel only.
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600_____________________ 7
© 2003 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
SOT23 L.EPS
3-Pin, Ultra-Low-Power SC70/SOT23
Voltage Detectors
MAX6375–MAX6380
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline infor