19-3075; Rev 3; 12/05
Low-Power, Single/Dual-Voltage Window
Detectors
The MAX6754–MAX6764 low-power window detectors
monitor undervoltage/overvoltage conditions on system
power supplies. These devices assert when the monitored voltage is under the undervoltage and/or over the
overvoltage thresholds.
The MAX6754–MAX6759/MAX6763/MAX6764 monitor a
single voltage. The MAX6760/MAX6761/MAX6762
monitor dual-voltage systems. The MAX6754/MAX6755/
MAX6756 provide a single undervoltage/overvoltage
output and the MAX6757–MAX6764 provide independent undervoltage and overvoltage outputs. The outputs are available in push-pull or open-drain
configurations.
The MAX6754–MAX6762 offer factory-fixed voltage
thresholds for monitoring system voltages from 0.9V to
5V with a selectable ±5%, ±10%, or ±15% window voltage. The MAX6763/MAX6764 allow for externally
adjustable thresholds. The MAX6754–MAX6762 are
available in two delay timing options (20µs, typ or
100ms, min). The MAX6760/MAX6761/MAX6762 also
include a latched overvoltage output function and the
MAX6754–MAX6762 include a manual reset input.
The family of products is available in small SOT23 and
TDFN packages and is specified over the extended
temperature range of -40°C to +125°C.
Applications
Telecommunications
Power Metering
Networking
Computers/Servers
DC-DC Converter
Modules
Data Storage
Automotive
Typical Application Circuit
VCC
µP
MAX6757
VCC
SET
GND
OV
NMI
MR
UV
RESET
Features
♦ Single- or Dual-Supply Voltage Monitors
♦ Factory-Trimmed Window Threshold Options for
5V, 3.3V, 3V, 2.5V, 1.8V, 1.5V, 1.2V, and 0.9V
Supplies
♦ Externally Adjustable Window Monitoring Options
for Supplies Down to 0.5V
♦ Selectable Window Threshold Options (±5%,
±10%, ±15%)
♦ Single (Combined UV/OV) or Dual (Separate UV
and OV) Outputs
♦ 20µs (typ) or 100ms (min) Timeout Period Options
(MAX6754–MAX6762)
♦ Manual Reset Input (MAX6754–MAX6762)
♦ Latched Overvoltage Output Function
(MAX6760/MAX6761/MAX6762)
♦ Immune to Short Voltage Transients
♦ Low 10µA Supply Current
♦ Low-Voltage Operation (Outputs Valid for VCC
Down to 1V)
♦ -40°C to +125°C Operating Temperature Range
♦ Small SOT23 and TDFN Packages
Ordering Information
PART*
TEMP RANGE
PIN-PACKAGE
MAX6754UK_D_-T
-40°C to +125°C
5 SOT23-5
MAX6755UK_D_-T
-40°C to +125°C
5 SOT23-5
MAX6756UK_D_-T
-40°C to +125°C
5 SOT23-5
MAX6757UT_D_-T
-40°C to +125°C
6 SOT23-6
MAX6758UT_D_-T
-40°C to +125°C
6 SOT23-6
*Insert the threshold level suffixes for VCC and VCC2 (Tables 1
and 2) after UK, UT, or TA. For the MAX6754–MAX6759, insert
only the VCC threshold suffix after the UK or UT. Insert the reset
timeout delay (Table 3) after D to complete the part number. For
example, the MAX6760TALTD3-T provides a VCC threshold of
5V, a VCC2 threshold of 3.3V, and a 100ms minimum reset timeout period. Sample stock is generally held on standard versions
only (see the Standard Versions table). Standard versions have
an order increment requirement of 2500 pieces. Nonstandard
versions have an order increment requirement of 10,000 pieces.
Contact factory for availability.
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
Ordering Information continued at end of data sheet.
Pin Configurations appear 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.
1
MAX6754–MAX6764
General Description
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
ABSOLUTE MAXIMUM RATINGS
(Voltages with respect to GND.)
VCC, VCC2, ............................................................-0.3V to +6.5V
SET, OVLATCH, MR, UVIN, OVIN ..............-0.3V to (VCC + 0.3V)
UV, RESET, OV (open drain) .................................-0.3V to +6.5V
RESET, OV, UV, UV, RESET (push-pull).....-0.3V to (VCC + 0.3V)
Input/Output Current (all pins) ............................................20mA
Continuous Power Dissipation (TA = +70°C)
5-Pin SOT23-5 (derate 7.1mW/°C above TA = +70°C)....571mW
6-Pin SOT23-6 (derate 8.7mW/°C above TA = +70°C)....696mW
8-Pin TDFN (derate 24.4mW/°C above TA = +70°C).....1951mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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.
ELECTRICAL CHARACTERISTICS
(VCC = 1.0V to 6.0V, VCC2 = 0 to 6.0V (MAX6760–MAX6762), TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA =
+25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
POWER REQUIREMENTS
Operating Voltage Range
VCC Supply Current
VCC
ICC
VCC2 Supply Current
ICC2
Adjustable Bias Current
(Note 2)
1.0
6.0
MAX6760TAAA/MAX6761TAAA/
MAX6762TAAA/MAX6763/MAX6764UT-T
1.4
6.0
V
VCC = 3.6V, MAX6754–MAX6759, no load
13
30
VCC = 3.6V, MAX6763/MAX6764, no load
10
23
VCC = 3.6V, VCC ≥ VCC2,
MAX6760/MAX6761/MAX6762, no load
13
30
VCC2 = 1.8V, VCC ≥ VCC2,
MAX6760/MAX6761/MAX6762
1
1.5
µA
+20
nA
VCC2 (MAX6760–MAX6762TA_AD_)
(Note 3)
-20
µA
VCC THRESHOLD
L, 5V
T, 3.3V
VCC Overvoltage Threshold
OVTH
TA = -40°C to
+125°C,
rising VCC
R, 3.0V
Z, 2.5V
W, 1.8V
2
VSET = VSB
5.750
5.875
6.000
SET = VCC
5.500
5.625
5.750
SET = GND
5.250
5.375
5.500
VSET = VSB
3.795
3.878
3.960
SET = VCC
3.630
3.713
3.795
SET = GND
3.465
3.548
3.630
VSET = VSB
3.450
3.525
3.600
SET = VCC
3.300
3.375
3.450
SET = GND
3.150
3.225
3.300
VSET = VSB
2.875
2.938
3.000
SET = VCC
2.750
2.813
2.875
SET = GND
2.625
2.688
2.750
VSET = VSB
2.070
2.115
2.160
SET = VCC
1.980
2.025
2.070
SET = GND
1.890
1.935
1.980
_______________________________________________________________________________________
V
Low-Power, Single/Dual-Voltage Window
Detectors
(VCC = 1.0V to 6.0V, VCC2 = 0 to 6.0V (MAX6760–MAX6762), TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA =
+25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
L, 5V
UVTH
TA = -40°C
to +125°C,
falling VCC
4.250
4.250
4.375
4.500
4.500
4.625
4.750
VSET = VSB
2.640
2.723
2.805
SET = VCC
2.805
2.888
2.970
SET = GND
2.970
3.053
3.135
VSET = VSB
2.400
2.475
2.550
SET = VCC
2.550
2.625
2.700
SET = GND
2.700
2.775
2.850
VSET = VSB
2.000
2.063
2.125
SET = VCC
2.125
2.188
2.250
SET = GND
2.250
2.313
2.375
VSET = VSB
1.440
1.485
1.530
W, 1.8V SET = VCC
1.530
1.575
1.620
SET = GND
1.620
1.665
1.710
VSET = VSB
3.795
3.878
3.960
SET = VCC
3.630
3.713
3.795
SET = GND
3.465
3.548
3.630
VSET = VSB
3.450
3.525
3.600
SET = VCC
3.300
3.375
3.450
SET = GND
3.150
3.225
3.300
VSET = VSB
2.875
2.938
3.000
SET = VCC
2.750
2.813
2.875
SET = GND
2.625
2.688
2.750
VSET = VSB
2.070
2.115
2.160
W, 1.8V SET = VCC
1.980
2.025
2.070
SET = GND
1.890
1.935
1.980
VSET = VSB (Note 2)
1.725
1.763
1.800
SET = VCC (Note 2)
1.650
1.688
1.725
SET = GND (Note 2)
1.575
1.613
1.650
VSET = VSB (Note 2)
1.380
1.410
1.440
SET = VCC (Note 2)
1.320
1.350
1.380
SET = GND (Note 2)
1.260
1.290
1.320
VSET = VSB (Note 2)
1.035
1.058
1.080
SET = VCC (Note 2)
0.990
1.013
1.035
SET = GND (Note 2)
0.945
0.968
0.990
VSET = VSB
0.489
0.500
0.511
SET = VCC
0.468
0.479
0.489
SET = GND
0.447
0.457
0.468
R, 3.0V
T, 3.3V
R, 3.0V
Z, 2.5V
OVTH2
MAX
4.125
SET = VCC
Z, 2.5V
VCC2 Overvoltage Threshold
TYP
4.000
SET = GND
T, 3.3V
VCC Undervoltage Threshold
MIN
VSET = VSB
TA = -40°C
to +125°C,
rising VCC2
I, 1.5V
G, 1.2V
E, 0.9V
ADJ
UNITS
V
V
_______________________________________________________________________________________
3
MAX6754–MAX6764
ELECTRICAL CHARACTERISTICS (continued)
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 1.0V to 6.0V, VCC2 = 0 to 6.0V (MAX6760–MAX6762), TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA =
+25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
VSET = VSB
2.640
2.723
2.805
SET = VCC
2.805
2.888
2.970
SET = GND
2.970
3.053
3.135
VSET = VSB
2.400
2.475
2.550
SET = VCC
2.550
2.625
2.700
SET = GND
2.700
2.775
2.850
VSET = VSB
2.000
2.063
2.125
SET = VCC
2.125
2.188
2.250
SET = GND
2.250
2.313
2.375
VSET = VSB
1.440
1.485
1.530
W, 1.8V SET = VCC
1.530
1.575
1.620
SET = GND
1.620
1.665
1.710
VSET = VSB (Note 2)
1.200
1.238
1.275
SET = VCC (Note 2)
1.275
1.313
1.350
SET = GND (Note 2)
1.350
1.388
1.425
VSET = VSB (Note 2)
0.960
0.990
1.020
SET = VCC (Note 2)
1.020
1.050
1.080
SET = GND (Note 2)
1.080
1.110
1.140
VSET = VSB (Note 2)
0.720
0.743
0.765
SET = VCC (Note 2)
0.765
0.788
0.810
SET = GND (Note 2)
0.810
0.833
0.855
VSET = VSB
0.340
0.351
0.362
SET = VCC
0.362
0.372
0.383
SET = GND
0.383
0.394
0.404
T, 3.3V
R, 3.0V
Z, 2.5V
VCC2 Undervoltage Threshold
UVTH2
TA = -40°C
to +125°C,
falling VCC2
I, 1.5V
G, 1.2V
E, 0.9V
ADJ
Threshold Hysteresis
VHYST
VCC, VCC2
0.7
UNITS
V
%
UNDERVOLTAGE/OVERVOLTAGE INPUTS (UVIN, OVIN) (MAX6763/MAX6764)
UVIN, OVIN Threshold Voltage
VTH-IN
UVIN, OVIN Input Bias Current
IIN
UVIN, OVIN Threshold
Hysteresis
4
VHYST
0.485
(Note 3)
0.5
-20
0.7
_______________________________________________________________________________________
0.515
V
+20
nA
%
Low-Power, Single/Dual-Voltage Window
Detectors
(VCC = 1.0V to 6.0V, VCC2 = 0 to 6.0V (MAX6760–MAX6762), TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA =
+25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
TIMING CHARACTERISTICS
Reset and UV Timeout Period
tRP
Figure 7
D0
D3
20
100
185
µs
320
ms
tD-RESET
VCC/VCC2 falling at 10mV/µs from
UVTH + 100mV to UVTH - 100mV
20
µs
VCC to UV Delay
tD-UV
VCC/VCC2 rising at 10mV/µs from
OVTH - 100mV to OVTH + 100mV
20
µs
VCC to OV Delay
tD-OV
VCC/VCC2 rising at 10mV/µs from
OVTH - 100mV to OVTH + 100mV
(MAX6757–MAX6762 only)
20
µs
UVIN to UV Delay
(MAX6763/MAX6764)
20
µs
OVIN to OV Delay
(MAX6763/MAX6764)
20
µs
D0 options only, OV output (Note 4)
2
ms
VCC to Reset Delay
Startup Delay Time
tSTART
THRESHOLD WINDOW SELECT INPUT (SET)
Input-Voltage Low
Input Bias Voltage
(Note 5)
VSB
0
0.1
VCC = 1.4V
0.65
0.75
VCC = 3.0V
0.81
2.19
1.10
4.90
VCC = 6.0V
Input-Voltage High
VCC - 0.1
Input Current
ISET
-1
V
V
VCC
V
+1
µA
0.23 x
VCC
V
MANUAL RESET (MR)
Input-Voltage Low
0.6 x
VCC
Input-Voltage High
Pullup Resistance to VCC
26
Minimum Pulse Width
kΩ
4
Transient Immunity
Propagation Delay
V
µs
300
tD-MR
MR falling, Figure 7
tMR_P
MR rising, Figure 7
ns
300
D0
D3
ns
40
100
185
320
ms
0.3 x
VCC
V
OVERVOLTAGE OUTPUT LATCH CONTROL INPUT (OVLATCH)
Input-Voltage Low
Input-Voltage High
0.7 x
VCC
V
_______________________________________________________________________________________
5
MAX6754–MAX6764
ELECTRICAL CHARACTERISTICS (continued)
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 1.0V to 6.0V, VCC2 = 0 to 6.0V (MAX6760–MAX6762), TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA =
+25°C.) (Note 1)
PARAMETER
Input Bias Current
SYMBOL
CONDITIONS
IOVLATCH
MIN
TYP
-1
MAX
UNITS
+1
µA
RESET, RESET, UV, UV, OV
RESET, UV Output Low (Open
Drain or Push-Pull)
RESET, UV Output High
(Push-Pull)
RESET, UV Output Low
(Push-Pull)
RESET, UV Output High
(Push-Pull)
6
VOL
VOH
VOL
VOH
Any VCC ≥ 1.0V, ISINK = 100µA,
output asserted
0.3
Any VCC ≥ 1.2V, ISINK = 200µA,
output asserted
0.3
Any VCC ≥ 1.71V, ISINK = 1.0mA,
output asserted
0.3
Any VCC ≥ 2.85V, ISINK = 2.0mA,
output asserted
0.3
Any VCC ≥ 4.75V, ISINK = 4.0mA,
output asserted
0.3
Any VCC ≥ 1.71V, ISOURCE = 0.8mA,
output deasserted
0.8 x
VCC
Any VCC ≥ 2.85V, ISOURCE = 2.0mA,
output deasserted
0.8 x
VCC
Any VCC ≥ 4.75V, ISOURCE = 4.0mA,
output deasserted
0.8 x
VCC
V
Any VCC ≥ 1.71V, ISINK = 1.0mA,
output deasserted
0.3
Any VCC ≥ 2.85V, ISINK = 2.0mA,
output deasserted
0.3
Any VCC ≥ 4.75V, ISINK = 4.0mA,
output deasserted
0.3
Any VCC ≥ 1.0V, ISOURCE = 50µA,
output asserted
0.8 x
VCC
Any VCC ≥ 1.2V, ISOURCE = 100µA,
output asserted
0.8 x
VCC
Any VCC ≥ 1.71V, ISOURCE = 0.8mA,
output asserted
0.8 x
VCC
Any VCC ≥ 2.85V, ISOURCE = 2.0mA,
output asserted
0.8 x
VCC
Any VCC ≥ 4.75V, ISOURCE = 4.0mA,
output asserted
0.8 x
VCC
_______________________________________________________________________________________
V
V
V
Low-Power, Single/Dual-Voltage Window
Detectors
(VCC = 1.0V to 6.0V, VCC2 = 0 to 6.0V (MAX6760–MAX6762), TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA =
+25°C.) (Note 1)
PARAMETER
OV Output Low
(Open-Drain or
Push-Pull)
VOL
OV Output High
(Push-Pull)
VOH
RESET, UV, OV Output OpenDrain Leakage Current
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
SYMBOL
ILKG
CONDITIONS
MIN
TYP
MAX
Any VCC ≥ 1.98V, ISINK = 1.4mA,
output asserted
0.3
Any VCC ≥ 2.75V, ISINK = 2.0mA,
output asserted
0.3
Any VCC ≥ 3.63V, ISINK = 3.0mA,
output asserted
0.3
Any VCC ≥ 5.5V, ISINK = 4.0mA,
output asserted
0.3
V
Any VCC ≥ 1.0V, ISOURCE = 50µA,
output deasserted
0.8 x
VCC
Any VCC ≥ 1.2V, ISOURCE = 100µA,
output deasserted
0.8 x
VCC
Any VCC ≥ 1.98V, ISOURCE = 1.4mA,
output deasserted
0.8 x
VCC
Any VCC ≥ 2.75V, ISOURCE = 2.0mA,
output deasserted
0.8 x
VCC
Any VCC ≥ 3.63V, ISOURCE = 3.0mA,
output deasserted
0.8 x
VCC
Any VCC ≥ 5.5V, ISOURCE = 4.5mA,
output deasserted
0.8 x
VCC
Output not asserted
UNITS
V
1
µA
Devices are production tested at +25°C. Overtemperature limits are guaranteed by design.
Voltage monitoring requires that VCC must be greater than or equal to 1.4V, but outputs remain asserted in the correct
state for VCC down to 1.0V.
Guaranteed by design.
For D0 window detector options and OV outputs, startup delay time is the time required for the internal reference/circuitry
to reach specified accuracy after the monitor is powered up from GND.
The input bias voltage is based off of VCC. The minimum value is given by the equation (0.1 x VCC + 0.51)V and the maximum value is given by (0.9 x VCC - 0.51)V.
_______________________________________________________________________________________
7
MAX6754–MAX6764
ELECTRICAL CHARACTERISTICS (continued)
Typical Operating Characteristics
(VCC = 5V, VCC2 = 3.3V, TA = +25°C, unless otherwise noted.)
UNDERVOLTAGE THRESHOLD
vs. TEMPERATURE
OVERVOLTAGE THRESHOLD RISING
1.00
0.99
OVERVOLTAGE THRESHOLD FALLING
0.98
NORMALIZED TO RISING
THRESHOLD AT TA = +25°C
0.97
UNDERVOLTAGE THRESHOLD RISING
1.00
UNDERVOLTAGE THRESHOLD FALLING
0.99
0.98
0.97
100
10
-40 -25 -10 5 20 35 50 65 80 95 110 125
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
TEMPERATURE (°C)
1
100
OVERDRIVE (mV)
20
MAX6754 toc04
192
TA = +125°C
TA = +85°C
TA = +25°C
TA = -40°C
18
16
ICC (µA)
190
188
186
14
12
184
10
182
8
6
180
1
-40 -25 -10 5 20 35 50 65 80 95 110 125
2
3
OUTPUT-VOLTAGE LOW
vs. SINK CURRENT
VCC = 3.3V
-0.2
VCC = 2.5V
-0.4
VCC = 1.8V
-0.6
VOH - VCC (V)
1.2
0
1.0
0.8
-1.0
-1.2
0.4
-1.4
0.2
-1.6
0
-1.8
5
10
ISINK (mA)
15
20
VCC = 5.0V
-0.8
0.6
0
MAX6754 toc07
VCC = 5.0V
1.4
6
5
OUTPUT-VOLTAGE HIGH
vs. SOURCE CURRENT
MAX6754 toc06
1.8
1.6
4
VCC (V)
TEMPERATURE (°C)
VOL (V)
10
SUPPLY CURRENT vs. SUPPLY VOLTAGE
194
TIMEOUT PERIOD (ms)
OUTPUT ASSERTS
ABOVE THIS LINE
NORMALIZED TO FALLING
THRESHOLD AT TA = +25°C
D3 TIMEOUT PERIOD
vs. TEMPERATURE
8
MAX6754 toc03
1.02
1.01
1000
MAX6754 toc05
1.01
1.03
TRANSIENT IMMUNITY (µs)
1.02
TRANSIENT IMMUNITY
vs. THRESHOLD OVERDRIVE
MAX6754 toc02
MAX6754 toc01
1.03
NORMALIZED UNDERVOLTAGE THRESHOLD (V)
OVERVOLTAGE THRESHOLD
vs. TEMPERATURE
NORMALIZED OVERVOLTAGE THRESHOLD (V)
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
VCC = 3.3V
VCC = 1.8V
VCC = 2.5V
0
5
10
15
ISOURCE (mA)
_______________________________________________________________________________________
20
1000
Low-Power, Single/Dual-Voltage Window
Detectors
PIN
MAX6754/ MAX6757/ MAX6760/
MAX6763/
MAX6755/ MAX6758/ MAX6761/
MAX6764
MAX6756 MAX6759 MAX6762
1
1
1
—
—
—
1
2
2
2
2
3
4
5
3
—
6
8
—
4
–
—
—
—
VCC
MR
RESET/
RESET
Reset Output. The Reset Output asserts when VCC is below the
selected UVTH threshold or above the selected OVTH threshold. Reset
output deasserts after the specified timeout period after VCC rises
above the UVTH threshold or drops below the OVTH threshold.
MAX6754: Active-low push-pull output (RESET).
MAX6755: Active-high push-pull output (RESET).
MAX6756: Active-low open-drain output (RESET).
SET
Threshold Window Select Input. SET configures the undervoltage and
overvoltage window range for the internal detectors. Connect SET to
GND for ±5% window, or to VCC for ±10% window. Bias SET to VCC/2
for a ±15% window.
Undervoltage Output. UV/UV asserts when the monitored
supply/supplies are below the UVTH thresholds or MR is low. UV/UV
deasserts after the specified timeout period when the monitored
supply/supplies rise above the UVTH thresholds or for the specified
propagation delay after MR goes high.
MAX6757/MAX6760: Active-low push-pull output (UV).
MAX6758/MAX6761: Active-high push-pull output (UV).
MAX6759/MAX6762: Active-low open-drain output (UV).
6
—
UV/
UV
—
—
3
—
VCC2
5
Ground
Active-Low Manual Reset Input. Drive MR low to assert undervoltage
and reset outputs. The asserted output remains asserted for the
specified propagation delay period after MR goes high. MR is internally
pulled up to VCC through a 26kΩ resistor.
4
5
Power Voltage Input. VCC powers the device. VCC is the monitored
voltage.
Power Input. VCC powers the device.
GND
—
5
FUNCTION
NAME
OV
VCC2 Voltage Input. Input for the second window voltage monitor, and
device output power supply when VCC2 > VCC.
Active-Low Overvoltage Output. OV asserts low when the monitored
supply/supplies are above their overvoltage threshold (OVTH). OV goes
high impedance immediately when the monitored supply/supplies drop
below OVTH.
There is no timeout delay period for the OV output.
For MAX6763/MAX6764, OV is low when OVIN is above the internal
0.5V threshold. OV is high when OVIN is below the internal 0.5V
threshold.
MAX6757–MAX6762: Active-low open-drain output.
MAX6763: Active-low push-pull output.
MAX6764: Active-low open-drain output.
_______________________________________________________________________________________
9
MAX6754–MAX6764
Pin Description
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
Pin Description (continued)
PIN
MAX6754/ MAX6757/ MAX6760/
MAX6763/
MAX6755/ MAX6758/ MAX6761/
MAX6764
MAX6756 MAX6759 MAX6762
7
—
NAME
FUNCTION
Overvoltage Output Latch Control Input. Drive OVLATCH high to latch
the overvoltage output for any VCC or VCC2 overvoltage condition. Drive
OVLATCH low to clear the latch after overvoltage conditions have been
OVLATCH
removed. The latch is transparent when OVLATCH is connected to
GND. OVLATCH is a high-impedance input. Use external pullup or
pulldown.
—
—
—
3
UVIN
Undervoltage Input. UV is low when UVIN is below the internal 0.5V
threshold. UV is high when UVIN is above the internal 0.5V threshold.
—
—
—
4
UV
Undervoltage Output. UV is low when UVIN is below the internal 0.5V
threshold. UV is high when UVIN is above the internal 0.5V threshold.
There is no timeout delay period for the UV output.
—
—
—
6
OVIN
Overvoltage Input. OV is low when OVIN is above the internal 0.5V
threshold. OV is high when OVIN is below the internal 0.5V threshold.
—
—
EP
—
EP
Exposed Pad. EP is internally connected to GND. Leave EP
unconnected or connect to GND.
Functional Diagrams
VCC
MR
ADJUST
MONITOR
VOLTAGE
TIMEOUT
PERIOD
OPTION
UVTH
(RESET)/
RESET
UV MONITOR
SET
OVTH
OV MONITOR
UV THRESHOLD
-5%, -10%, -15%
GND
OV THRESHOLD
+5%, +10%, +15%
MAX6754/MAX6755/MAX6756
INTERNAL
REFERENCE
( ) MAX6755 ONLY.
Figure 1. MAX6754/MAX6755/MAX6756 Functional Diagram
10
______________________________________________________________________________________
Low-Power, Single/Dual-Voltage Window
Detectors
VCC
ADJUST
MONITOR
VOLTAGE
TIMEOUT
PERIOD
OPTION
UVTH
(UV)/
UV
UV MONITOR
SET
MR
VCC
OV
OVTH
OV MONITOR
UV THRESHOLD
-5%, -10%, -15%
GND
OV THRESHOLD
+5%, +10%, +15%
MAX6757/MAX6758/MAX6759
INTERNAL
REFERENCE
( ) MAX6758 ONLY.
Figure 2. MAX6757/MAX6758/MAX6759 Functional Diagram
______________________________________________________________________________________
11
MAX6754–MAX6764
Functional Diagrams (continued)
Low-Power, Single/Dual-Voltage Window
Detectors
MAX6754–MAX6764
Functional Diagrams (continued)
VCC
MR
ADJUST
MONITOR
VOLTAGE
UVTH
UV MONITOR
TIMEOUT
PERIOD
OPTION
OV
CIRCUIT
OVTH
(UV)/
UV
OV
OV MONITOR
SET
UV THRESHOLD
-5%, -10%, -15%
OVLATCH
OV THRESHOLD
+5%, +10%, +15%
INTERNAL
REFERENCE
GND
UVTH
VCC2
UV MONITOR
ADJUST
MONITOR
VOLTAGE
MAX6760/MAX6761/MAX6762
OVTH
OV MONITOR
( ) MAX6761 ONLY.
Figure 3. MAX6760/MAX6761/MAX6762 Functional Diagram
12
______________________________________________________________________________________
Low-Power, Single/Dual-Voltage Window
Detectors
UVIN
MAX6763/MAX6764
UV
UVTH
VCC
The MAX6754–MAX6762 offer factory-fixed voltage
thresholds for monitoring system voltages from 0.9V to
5V. The MAX6754–MAX6762 include a SET function to
select the window voltage to ±5%, ±10%, or ±15%. The
MAX6763/MAX6764 allow for externally adjustable
upper and lower voltage thresholds to be set externally
(down to 0.5V). The MAX6754–MAX6762 are available
with two timing options (20µs propagation delay or
100ms minimum reset timeout).
UV MONITOR
INTERNAL
REFERENCE
0.5V
Supply Voltages
GND
OVTH
OV
OVIN
OV MONITOR
Figure 4. MAX6763/MAX6764 Functional Diagram
Detailed Description
The MAX6754–MAX6764 are low-power window voltage detectors capable of monitoring undervoltage and
overvoltage conditions on system power supplies.
Whenever a monitored voltage falls below its undervoltage threshold or exceeds its overvoltage threshold,
these devices assert their outputs to notify the system
(see the Functional Diagrams).
The MAX6754/MAX6755/MAX6756 are single-voltage
window detectors with internally fixed nominal voltage,
externally adjustable set window, single reset
under/overvoltage output, and a manual reset input.
The MAX6757/MAX6758/MAX6759 are single-voltage
window detectors with internally set nominal voltage,
externally adjustable set window, separate under/overvoltage outputs, and manual reset input.
The MAX6760/MAX6761/MAX6762 are dual-voltage
window detectors with internally/externally set nominal
voltages, externally adjustable set window, separate
under/overvoltage outputs, manual reset input, and
overvoltage latch functions.
The MAX6763/MAX6764 are single adjustable window
detectors with separate under/overvoltage outputs.
VCC is the power-supply input and the monitored voltage
of the MAX6754–MAX6762. These devices feature a factory-trimmed VCC and VCC2 divider that sets the nominal
input range (see Tables 1 and 2). VCC for the MAX6763/
MAX6764 is the power supply of the device and not the
monitored voltage. For noisy systems, bypass VCC and
VCC2 each with a 0.1µF capacitor to GND.
Setting the Adjustable Nominal Voltage
Threshold
The MAX6760/MAX6761/MAX6762 (versions with suffixes LA, TA, RA, ZA, WA, and AA) offer adjustable nominal
voltage threshold to monitor VCC2. Use an external voltage-divider to set the voltage at V CC2 to 0.4255V.
Configure SET to select a monitor window of ±5%,
±10%, or ±15% (see Figure 5). The MAX6760/MAX6761/
MAX6762 suffix AA monitor only VCC2 and do not monitor VCC.
0.4255V +5%
+10%
+15%
V+
OV
R1
VCC2
(UV)
R2
UV
0.4255V -5%
-10%
-15%
MAX6760/MAX6761/MAX6762
(SUFFIXES LA, TA, RA, ZA, WA, AA)
( ) MAX6761 ONLY.
Figure 5. Setting the Threshold Voltage of VCC2
______________________________________________________________________________________
13
MAX6754–MAX6764
Functional Diagrams (continued)
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
Overvoltage Latch Control Input
(OVLATCH)
V+
The MAX6760/MAX6761/MAX6762 provide an overvoltage latch control input (OVLATCH). Drive OVLATCH
high to latch the overvoltage output for any VCC or
VCC2 overvoltage condition. Drive OVLATCH low to
clear the latch after overvoltage conditions have been
removed. The latch is transparent when OVLATCH is
connected to GND. OVLATCH is a high impedance
input. Use external pullup or pulldown.
R1
UVIN
MAX6763/MAX6764
UV
UVTH
R2
VCC
UV MONITOR
INTERNAL
REFERENCE
0.5V
GND
Reset, Undervoltage, and Overvoltage
Outputs (RESET, RESET, UV, UV, OV)
OVTH
RESET, RESET, UV, UV, and OV outputs assert when
the monitored supply is below the selected UVTH
threshold or above the selected OVTH threshold. The
reset output deasserts after the specified timeout period when the monitored supply rises above the UVTH
threshold or drops below the OV TH threshold. The
push-pull versions are referenced to VCC.
The MAX6760/MAX6761/MAX6762 monitor both V CC
and VCC2. An under/overvoltage condition on either
voltage supply asserts the corresponding output.
RESET and UV are guaranteed to be in the correct
logic state when VCC or VCC2 > 1V.
OV
OVIN
OV MONITOR
R3
OVERVOLTAGE ASSERTS WHEN
UNDERVOLTAGE ASSERTS WHEN
V+ x R3
R1 + R2 + R3
> 0.5V
V+ x (R2 + R3)
R1 + R2 + R3
< 0.5V
Figure 6. Setting the Under/Overvoltage Window
Choose R2 to have a resistance of up to 500kΩ.
Calculate R1 by:
R1 = ((V+ - 0.4255V) x R2) / 0.4255V
MR
The MAX6763/MAX6764 provide inputs to a window
detector allowing the programming of the threshold
voltage to within VCC (see Figure 6).
Choose R1, R2, and R3 such that:
(V+ / (R1 + R2 + R3)) ≥ 1µA
tD-MR
tMR_P
RESET, UV
SET
The MAX6754–MAX6762 allow the setting of the window
voltage range of the voltage detector. Connect SET to
GND to set a ±5% window. Connect SET to VCC for a
±10% window. Bias SET to VCC / 2 for a ±15% window.
Manual Reset (MR)
The MAX6754–MAX6762 include an active-low manual
reset input. Drive MR low to assert a reset output
(MAX6754/MAX6755/MAX6756) or an undervoltage
output (MAX6757/MAX6758/MAX6759). The output
remains asserted for the specified propagation delay
time (see Figure 7) after MR goes high. MR is internally
pulled to VCC with a 26kΩ resistor.
Figure 7a. Manual Reset/Reset Timing Diagram
VCC
tD-UV
RESET, UV
tRP
(RESET IS THE COMPLEMENT OF RESET)
Figure 7b. VCC/RESET, UV Timing Diagram
14
______________________________________________________________________________________
Low-Power, Single/Dual-Voltage Window
Detectors
Microprocessor Monitoring
Figure 8 shows a microprocessor monitoring circuit. An
overvoltage condition on either the core or I/O supply
CORE
DC-DC
CONVERTER
FUSE
CORE
I/O
DC-DC
CONVERTER
I/O
µP
UNREGULATED
POWER SOURCE
MAX6760
VCC2
MR
PUSH BUTTON
SCR
100kΩ
100kΩ
VCC
OVLATCH
GND
UV
RESET
SET
OV
NMI
100kΩ
*C1
1µF
*OPTIONAL.
Figure 8. Microprocessor Monitoring
Selector Guide
PUSH-PULL
RESET
PUSH-PULL OPEN-DRAIN PUSH-PULL
RESET
RESET
UV
PUSH-PULL OPEN-DRAIN PUSH-PULL OPEN-DRAIN
UV
UV
OV
OV
MAX6754
X
—
—
—
—
—
—
—
MAX6755
—
X
—
—
—
—
—
—
MAX6756
—
—
X
—
—
—
—
MAX6757
—
—
—
X
—
—
—
X
MAX6758
—
—
—
—
X
—
—
X
MAX6759
—
—
—
—
—
X
—
X
MAX6760
—
—
—
X
—
—
—
X
MAX6761
—
—
—
—
X
—
—
X
MAX6762
—
—
—
—
—
X
—
X
MAX6763
—
—
—
X
—
—
X
—
MAX6764
—
—
—
—
—
X
—
X
______________________________________________________________________________________
15
MAX6754–MAX6764
turns the SCR on, blowing the fuse to disconnect the
circuit from the power source. An optional capacitor
(C1) on the gate of the SCR provides additional transient immunity against nuisance trips.
Applications Information
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
Table 1. Window Threshold Voltage
Suffix Guide Single Fixed VCC
(MAX6754—MAX6759)
PART NO. SUFFIX
VCC NOMINAL SYSTEM VOLTAGE (V)
L
5.0
T
3.3
R
3.0
Z
2.5
W
1.8
Table 3. Timeout Period Suffix Guide
TIMEOUT
PERIOD SUFFIX
ACTIVE TIMEOUT PERIOD
MIN (ms)
TYP (MS)
D0
—
0.02
—
D3
100
185
320
Ordering Information (continued)
PART*
Table 2. Window Threshold Voltage
Suffix Guide Dual Fixed/Adjustable
(MAX6760/MAX6761/MAX6762)
PART NO.
SUFFIX
VCC NOMINAL
SYSTEM VOLTAGE
(V)
VCC2 NOMINAL
SYSTEM VOLTAGE
(V)
LT
5
3.3
LR
5
3.0
LA
5
ADJ*
TZ
3.3
2.5
TW
3.3
1.8
TI
3.3
1.5
TG
3.3
1.2
TE
3.3
0.9
TA
3.3
ADJ*
RZ
3.0
2.5
RW
3.0
1.8
RI
3.0
1.5
RG
3.0
1.2
RE
3.0
0.9
RA
3.0
ADJ*
ZW
2.5
1.8
1.5
ZI
2.5
ZG
2.5
1.2
ZE
2.5
0.9
ZA
2.5
ADJ*
WI
1.8
1.5
WG
1.8
1.2
WE
1.8
0.9
WA
1.8
ADJ*
AA
—
ADJ*
TEMP RANGE
PIN-PACKAGE
MAX6759UT_D_-T
-40°C to +125°C
6 SOT23-6
MAX6760TA_ _D_-T
-40°C to +125°C
8 TDFN-8
MAX6761TA_ _D_-T
-40°C to +125°C
8 TDFN-8
MAX6762TA_ _D_-T
-40°C to +125°C
8 TDFN-8
MAX6763UT-T
-40°C to +125°C
6 SOT23-6
MAX6764UT-T
-40°C to +125°C
6 SOT23-6
*Insert the threshold level suffixes for VCC and VCC2 (Tables 1
and 2) after UK, UT, or TA. For the MAX6754–MAX6759, insert
only the VCC threshold suffix after the UK or UT. Insert the reset
timeout delay (Table 3) after D to complete the part number. For
example, the MAX6760TALTD3-T provides a VCC threshold of
5V, a VCC2 threshold of 3.3V, and a 100ms minimum reset timeout period. Sample stock is generally held on standard versions
only (see the Standard Versions table). Standard versions have
an order increment requirement of 2500 pieces. Nonstandard
versions have an order increment requirement of 10,000 pieces.
Contact factory for availability.
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
*See the Setting the Adjustable Nominal Voltage Threshold section.
16
MAX (ms)
______________________________________________________________________________________
Low-Power, Single/Dual-Voltage Window
Detectors
PART
TOP MARK
PART
TOP MARK
AEOC
MAX6758UTLD0
ABSY
MAX6754UKLD3
AEJN
MAX6758UTLD3
ABRG
MAX6754UKTD0
AEOD
MAX6758UTTD0
ABSZ
ABRH
MAX6754UKLD0
AEJO
MAX6758UTTD3
MAX6754UKZD0
AEJQ
MAX6758UTZD0
ABRJ
MAX6754UKZD3
AEOF
MAX6758UTZD3
ABTB
MAX6754UKWD0
AEOG
MAX6758UTWD0
ABTC
MAX6754UKWD3
AEJR
MAX6758UTWD3
ABRK
MAX6755UKLD0
AEOH
MAX6759UTLD0
ABRL
MAX6755UKLD3
AEJS
MAX6759UTLD3
ABTD
MAX6755UKTD0
AEOI
MAX6759UTTD0
ABRM
MAX6755UKTD3
AEJT
MAX6759UTTD3
ABTE
MAX6755UKZD0
AEKV
MAX6759UTZD0
ABTG
MAX6755UKZD3
AEOK
MAX6759UTZD3
ABRO
MAX6755UKWD0
AEOL
MAX6759UTWD0
ABRP
AEJW
MAX6759UTWD3
ABTH
MAX6756UKLD0
AEJX
MAX6760TALTD3
AIO
MAX6756UKLD3
AEOM
MAX6760TALAD3
AHI
MAX6756UKTD0
AEJY
MAX6760TATZD3
AIR
MAX6756UKTD3
AEON
MAX6760TATWD3
AHJ
MAX6756UKZD0
AEOP
MAX6760TATAD3
AIT
MAX6756UKZD3
AEKA
MAX6760TARAD3
AIV
MAX6756UKWD0
AEKB
MAX6760TAZWD3
AIX
AIZ
MAX6754UKTD3
MAX6755UKWD3
AEOQ
MAX6760TAZAD3
MAX6757UTTD0
ABST
MAX6760TAWED3
AJB
MAX6757UTTD3
ABRB
MAX6760TAWAD3
AHL
MAX6757UTLD0
ABSO
MAX6757UTLD3
ABRC
MAX6757UTZD0
ABRE
MAX6757UTZD3
ABSW
MAX6757UTWD0
ABSX
MAX6757UTWD3
ABRF
MAX6756UKWD3
______________________________________________________________________________________
17
MAX6754–MAX6764
Standard Versions Table
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
Standard Versions Table (continued)
PART
TOP MARK
PART
TOP MARK
MAX6761TALTD3
AJD
MAX6762TALTD3
AJT
MAX6761TALAD3
AHN
MAX6762TALAD3
AHR
MAX6761TATZD3
AJG
MAX6762TATZD3
AJW
MAX6761TATWD3
AHO
MAX6762TATWD3
AJY
MAX6761TATAD3
AJI
MAX6762TATAD3
AKA
MAX6761TARAD3
AJK
MAX6762TARAD3
AKB
MAX6761TAZWD3
AJM
MAX6762TAZWD3
AHT
MAX6761TAZAD3
AJO
MAX6762TAZAD3
AKE
MAX6761TAWED3
AJQ
MAX6762TAWED3
AKF
MAX6761TAWAD3
AHQ
MAX6762TAWAD3
18
AKH
MAX6763UT
ABRQ
MAX6764UT
ABRR
______________________________________________________________________________________
Low-Power, Single/Dual-Voltage Window
Detectors
TOP VIEW
VCC
1
5
SET
VCC 1
GND 2
GND 2
MAX6754
MAX6755
MAX6756
MR 3
VCC2 3
8 MR
MAX6760
MAX6761
MAX6762
SET 4
4
7 OVLATCH
6 UV (UV)
5 OV
RESET (RESET)
TDFN
( ) MAX6761 ONLY.
SOT23
( ) MAX6755 ONLY.
VCC 1
GND 2
MR
MAX6757
MAX6758
MAX6759
3
SOT23
6
SET
VCC 1
5
OV
GND 2
4
UV (UV)
UVIN 3
MAX6763
MAX6764
6
OVIN
5
OV
4
UV
SOT23
( ) MAX6758 ONLY.
Chip Information
TRANSISTOR COUNT: 726
PROCESS: BiCMOS
______________________________________________________________________________________
19
MAX6754–MAX6764
Pin Configurations
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
6, 8, &10L, DFN THIN.EPS
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
PACKAGE OUTLINE, 6,8,10 & 14L,
TDFN, EXPOSED PAD, 3x3x0.80 mm
21-0137
COMMON DIMENSIONS
MIN.
MAX.
PKG. CODE
N
D2
E2
e
JEDEC SPEC
b
A
0.70
0.80
T633-1
6
1.50±0.10
2.30±0.10
0.95 BSC
MO229 / WEEA
0.40±0.05
1.90 REF
D
2.90
3.10
T633-2
6
1.50±0.10
2.30±0.10
0.95 BSC
MO229 / WEEA
0.40±0.05
1.90 REF
E
2.90
3.10
T833-1
8
1.50±0.10
2.30±0.10
0.65 BSC
MO229 / WEEC
0.30±0.05
1.95 REF
0.00
0.05
T833-2
8
1.50±0.10
2.30±0.10
0.65 BSC
MO229 / WEEC
0.30±0.05
1.95 REF
L
0.20
0.40
T833-3
8
1.50±0.10
2.30±0.10
0.65 BSC
MO229 / WEEC
0.30±0.05
1.95 REF
T1033-1
10
1.50±0.10
2.30±0.10
0.50 BSC
MO229 / WEED-3
0.25±0.05
2.00 REF
A2
0.20 REF.
2
[(N/2)-1] x e
A1
0.25 MIN.
1
PACKAGE VARIATIONS
SYMBOL
k
H
T1033-2
10
1.50±0.10
2.30±0.10
0.50 BSC
MO229 / WEED-3
0.25±0.05
2.00 REF
T1433-1
14
1.70±0.10
2.30±0.10
0.40 BSC
----
0.20±0.05
2.40 REF
T1433-2
14
1.70±0.10
2.30±0.10
0.40 BSC
----
0.20±0.05
2.40 REF
PACKAGE OUTLINE, 6,8,10 & 14L,
TDFN, EXPOSED PAD, 3x3x0.80 mm
-DRAWING NOT TO SCALE-
20
21-0137
H
2
2
______________________________________________________________________________________
Low-Power, Single/Dual-Voltage Window
Detectors
SOT-23 5L .EPS
PACKAGE OUTLINE, SOT-23, 5L
21-0057
E
1
1
______________________________________________________________________________________
21
MAX6754–MAX6764
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
6LSOT.EPS
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
PACKAGE OUTLINE, SOT 6L BODY
21-0058
G
1
1
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.
22 ____________________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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