General Description
The MAX6754–MAX6764 low-power window detectors
monitor undervoltage/overvoltage conditions on system
power supplies. These devices assert when the moni-
tored 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 indepen-
dent undervoltage and overvoltage outputs. The out-
puts 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 volt-
age. 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
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
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
MAX6757
NMI
RESETMR
GND
VCC
UV
OV
SET
VCC
µP
Typical Application Circuit
19-3075; Rev 3; 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.
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
Ordering Information continued at end of data sheet.
Pin Configurations appear at end of data sheet.
Telecommunications
Networking
Computers/Servers
Data Storage
Power Metering
DC-DC Converter
Modules
Automotive
*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 time-
out 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.
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
2_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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)
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.
(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
PARAMETER
SYMBOL
CONDITIONS
MIN
MAX
UNITS
POWER REQUIREMENTS
(Note 2) 1.0 6.0
Operating Voltage Range VCC 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 Supply Current ICC VCC = 3.6V, VCC ≥ VCC2,
MAX6760/MAX6761/MAX6762, no load 13 30
µA
VCC2 Supply Current VCC2 = 1.8V, VCC ≥ VCC2,
MAX6760/MAX6761/MAX6762 1 1.5 µA
Adjustable Bias Current
ICC2 VCC2 (MAX6760–MAX6762TA_AD_)
(Note 3) -20
+20
nA
VCC THRESHOLD
VSET = VSB
5.750 5.875 6.000
SET = VCC
5.500 5.625 5.750
L, 5V
SET = GND
5.250 5.375 5.500
VSET = VSB
3.795 3.878 3.960
SET = VCC
3.630 3.713 3.795
T, 3.3V
SET = GND
3.465 3.548 3.630
VSET = VSB
3.450 3.525 3.600
SET = VCC
3.300 3.375 3.450
R, 3.0V
SET = GND
3.150 3.225 3.300
VSET = VSB
2.875 2.938 3.000
SET = VCC
2.750 2.813 2.875
Z, 2.5V
SET = GND
2.625 2.688 2.750
VSET = VSB
2.070 2.115 2.160
SET = VCC
1.980 2.025 2.070
VCC Overvoltage Threshold OVTH
TA = -40°C to
+125°C,
rising VCC
W, 1.8V
SET = GND
1.890 1.935 1.980
V
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
_______________________________________________________________________________________ 3
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
UNITS
VSET = VSB
4.000 4.125 4.250
SET = VCC
4.250 4.375 4.500
L, 5V
SET = GND
4.500 4.625 4.750
VSET = VSB
2.640 2.723 2.805
SET = VCC
2.805 2.888 2.970T, 3.3V
SET = GND
2.970 3.053 3.135
VSET = VSB
2.400 2.475 2.550
SET = VCC
2.550 2.625 2.700
R, 3.0V
SET = GND
2.700 2.775 2.850
VSET = VSB
2.000 2.063 2.125
SET = VCC
2.125 2.188 2.250Z, 2.5V
SET = GND
2.250 2.313 2.375
VSET = VSB
1.440 1.485 1.530
SET = VCC
1.530 1.575 1.620
VCC Undervoltage Threshold UVTH
TA = -40°C
to +125°C,
falling VCC
W, 1.8V
SET = GND
1.620 1.665 1.710
V
VSET = VSB
3.795 3.878 3.960
SET = VCC
3.630 3.713 3.795
T, 3.3V
SET = GND
3.465 3.548 3.630
VSET = VSB
3.450 3.525 3.600
SET = VCC
3.300 3.375 3.450R, 3.0V
SET = GND
3.150 3.225 3.300
VSET = VSB
2.875 2.938 3.000
SET = VCC
2.750 2.813 2.875Z, 2.5V
SET = GND
2.625 2.688 2.750
VSET = VSB
2.070 2.115 2.160
SET = VCC
1.980 2.025 2.070
W, 1.8V
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 1.725I, 1.5V
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
G, 1.2V
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 1.035E, 0.9V
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
VCC2 Overvoltage Threshold
OVTH2
TA = -40°C
to +125°C,
rising VCC2
ADJ
SET = GND
0.447 0.457 0.468
V
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
4_______________________________________________________________________________________
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
MAX
UNITS
VSET = VSB
2.640 2.723 2.805
SET = VCC
2.805 2.888 2.970
T, 3.3V
SET = GND
2.970 3.053 3.135
VSET = VSB
2.400 2.475 2.550
SET = VCC
2.550 2.625 2.700R, 3.0V
SET = GND
2.700 2.775 2.850
VSET = VSB
2.000 2.063 2.125
SET = VCC
2.125 2.188 2.250
Z, 2.5V
SET = GND
2.250 2.313 2.375
VSET = VSB
1.440 1.485 1.530
SET = VCC
1.530 1.575 1.620W, 1.8V
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 1.350I, 1.5V
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
G, 1.2V
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 0.810E, 0.9V
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
VCC2 Undervoltage Threshold UVTH2
TA = -40°C
to +125°C,
falling VCC2
ADJ
SET = GND
0.383 0.394 0.404
V
Threshold Hysteresis VHYST VCC, VCC2 0.7 %
UNDERVOLTAGE/OVERVOLTAGE INPUTS (UVIN, OVIN) (MAX6763/MAX6764)
UVIN, OVIN Threshold Voltage
VTH-IN
0.485
0.5
0.515
V
UVIN, OVIN Input Bias Current
IIN (Note 3) -20
+20
nA
UVIN, OVIN Threshold
Hysteresis VHYST 0.7 %
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
_______________________________________________________________________________________ 5
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
UNITS
TIMING CHARACTERISTICS
D0 20 µs
Reset and UV Timeout Period tRP Figure 7 D3
100 185 320
ms
VCC to Reset Delay
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
Startup Delay Time tSTART D0 options only, OV output (Note 4) 2 ms
THRESHOLD WINDOW SELECT INPUT (SET)
Input-Voltage Low 0 0.1 V
VCC = 1.4V
0.65 0.75
VCC = 3.0V
0.81 2.19
Input Bias Voltage
(Note 5) VSB
VCC = 6.0V
1.10 4.90
V
Input-Voltage High VCC - 0.1
VCC
V
Input Current ISET -1 +1 µA
MANUAL RESET (MR)
Input-Voltage Low 0.23 x
VCC
V
Input-Voltage High 0.6 x
VCC
V
Pullup Resistance to VCC 26 kΩ
Minimum Pulse Width 4µs
Transient Immunity
300
ns
tD-MR MR falling, Figure 7
300
D0 40 ns
Propagation Delay tMR_P MR rising, Figure 7 D3
100 185 320
ms
OVERVOLTAGE OUTPUT LATCH CONTROL INPUT (OVLATCH)
Input-Voltage Low 0.3 x
VCC
V
Input-Voltage High 0.7 x
VCC
V
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
6_______________________________________________________________________________________
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
UNITS
Input Bias Current
IOVLATCH
-1 +1 µA
RESET, RESET, UV, UV, OV
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
RESET, UV Output Low (Open
Drain or Push-Pull) VOL
Any VCC ≥ 4.75V, ISINK = 4.0mA,
output asserted 0.3
V
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
RESET, UV Output High
(Push-Pull) VOH
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
RESET, UV Output Low
(Push-Pull) VOL
Any VCC ≥ 4.75V, ISINK = 4.0mA,
output deasserted 0.3
V
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
RESET, UV Output High
(Push-Pull) VOH
Any VCC ≥ 4.75V, ISOURCE = 4.0mA,
output asserted
0.8 x
VCC
V
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
_______________________________________________________________________________________ 7
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
UNITS
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
OV Output Low
(Open-Drain or
Push-Pull)
VOL
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
OV Output High
(Push-Pull) VOH
Any VCC ≥ 5.5V, ISOURCE = 4.5mA,
output deasserted
0.8 x
VCC
V
RESET, UV, OV Output Open-
Drain Leakage Current ILKG Output not asserted 1 µA
Note 1: Devices are production tested at +25°C. Overtemperature limits are guaranteed by design.
Note 2: 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.
Note 3: Guaranteed by design.
Note 4: 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.
Note 5: 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 maxi-
mum value is given by (0.9 x VCC - 0.51)V.
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
8_______________________________________________________________________________________
Typical Operating Characteristics
(VCC = 5V, VCC2 = 3.3V, TA= +25°C, unless otherwise noted.)
OVERVOLTAGE THRESHOLD
vs. TEMPERATURE
MAX6754 toc01
TEMPERATURE (°C)
NORMALIZED OVERVOLTAGE THRESHOLD (V)
1109580655035205-10-25
0.98
0.99
1.00
1.01
1.02
1.03
0.97
-40 125
OVERVOLTAGE THRESHOLD RISING
OVERVOLTAGE THRESHOLD FALLING
NORMALIZED TO RISING
THRESHOLD AT TA = +25°C
UNDERVOLTAGE THRESHOLD
vs. TEMPERATURE
MAX6754 toc02
TEMPERATURE (°C)
NORMALIZED UNDERVOLTAGE THRESHOLD (V)
1109580655035205-10-25
0.98
0.99
1.00
1.01
1.02
1.03
0.97
-40 125
UNDERVOLTAGE THRESHOLD RISING
UNDERVOLTAGE THRESHOLD FALLING
NORMALIZED TO FALLING
THRESHOLD AT TA = +25°C
TRANSIENT IMMUNITY
vs. THRESHOLD OVERDRIVE
MAX6754 toc03
OVERDRIVE (mV)
TRANSIENT IMMUNITY (µs)
10010
100
10001
1000
10
OUTPUT ASSERTS
ABOVE THIS LINE
D3 TIMEOUT PERIOD
vs. TEMPERATURE
MAX6754 toc04
TIMEOUT PERIOD (ms)
182
184
186
188
190
192
194
180
TEMPERATURE (°C)
1109580655035205-10-25-40 125
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX6754 toc05
VCC (V)
ICC (µA)
5432
8
10
12
14
16
18
20
6
16
TA = +125°C
TA = +85°C
TA = +25°C
TA = -40°C
OUTPUT-VOLTAGE LOW
vs. SINK CURRENT
MAX6754 toc06
ISINK (mA)
VOL (V)
15105
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
0
020
VCC = 5.0V
VCC = 3.3V
VCC = 2.5V
VCC = 1.8V
OUTPUT-VOLTAGE HIGH
vs. SOURCE CURRENT
MAX6754 toc07
ISOURCE (mA)
VOH - VCC (V)
15105
-1.6
-1.4
-1.2
-1.0
-0.8
-0.6
-0.4
-0.2
0
-1.8
020
VCC = 5.0V
VCC = 3.3V
VCC = 2.5V
VCC = 1.8V
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
_______________________________________________________________________________________ 9
Pin Description
PIN
MAX6754/
MAX6755/
MAX6756
MAX6757/
MAX6758/
MAX6759
MAX6760/
MAX6761/
MAX6762
MAX6763/
MAX6764
NAME
FUNCTION
111– Power Voltage Input. VCC powers the device. VCC is the monitored
voltage.
——— 1
VCC
Power Input. VCC powers the device.
2222GND Ground
338—MR
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———
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).
564—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.
—4 6—
UV/
UV
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).
—— 3 —V
CC2 VCC2 Voltage Input. Input for the second window voltage monitor, and
device output power supply when VCC2 > VCC.
555OV
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.
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
10 ______________________________________________________________________________________
Pin Description (continued)
PIN
MAX6754/
MAX6755/
MAX6756
MAX6757/
MAX6758/
MAX6759
MAX6760/
MAX6761/
MAX6762
MAX6763/
MAX6764
NAME
FUNCTION
7—
OVLATCH
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
removed. The latch is transparent when OVLATCH is connected to
GND. OVLATCH is a high-impedance input. Use external pullup or
pulldown.
——— 3UVIN 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.
——— 4UV
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.
———6OVIN 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
TIMEOUT
PERIOD
OPTION
ADJUST
MONITOR
VOLTAGE
UV THRESHOLD
-5%, -10%, -15%
OV THRESHOLD
+5%, +10%, +15%
INTERNAL
REFERENCE
GND
(RESET)/
RESET
MR
VCC
OV MONITOR
UV MONITOR
MAX6754/MAX6755/MAX6756
OVTH
UVTH
SET
( ) MAX6755 ONLY.
Figure 1. MAX6754/MAX6755/MAX6756 Functional Diagram
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
______________________________________________________________________________________ 11
TIMEOUT
PERIOD
OPTION
ADJUST
MONITOR
VOLTAGE
UV THRESHOLD
-5%, -10%, -15%
OV THRESHOLD
+5%, +10%, +15%
INTERNAL
REFERENCE
GND
(UV)/
UV
MR
VCC
OV MONITOR
UV MONITOR
MAX6757/MAX6758/MAX6759
OVTH
UVTH
SET
( ) MAX6758 ONLY.
OV
VCC
Figure 2. MAX6757/MAX6758/MAX6759 Functional Diagram
Functional Diagrams (continued)
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
12 ______________________________________________________________________________________
OV MONITOR
UV MONITOR
OVTH
UVTH
OV MONITOR
UV MONITOR
OVTH
UVTH
UV THRESHOLD
-5%, -10%, -15% OV THRESHOLD
+5%, +10%, +15%
INTERNAL
REFERENCE
ADJUST
MONITOR
VOLTAGE
ADJUST
MONITOR
VOLTAGE
TIMEOUT
PERIOD
OPTION
OV
CIRCUIT
MRVCC
VCC2
SET
GND
(UV)/
UV
OV
OVLATCH
MAX6760/MAX6761/MAX6762
( ) MAX6761 ONLY.
Figure 3. MAX6760/MAX6761/MAX6762 Functional Diagram
Functional Diagrams (continued)
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
______________________________________________________________________________________ 13
Detailed Description
The MAX6754–MAX6764 are low-power window volt-
age detectors capable of monitoring undervoltage and
overvoltage conditions on system power supplies.
Whenever a monitored voltage falls below its undervolt-
age 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/over-
voltage 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.
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).
Supply Voltages
VCC is the power-supply input and the monitored voltage
of the MAX6754–MAX6762. These devices feature a fac-
tory-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 suffix-
es LA, TA, RA, ZA, WA, and AA) offer adjustable nominal
voltage threshold to monitor VCC2. Use an external volt-
age-divider to set the voltage at VCC2 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 moni-
tor VCC.
INTERNAL
REFERENCE
0.5V
GND
OV MONITOR
UV MONITOR
OVTH
UVTH
UV
OV
UVIN
VCC
OVIN
MAX6763/MAX6764
Figure 4. MAX6763/MAX6764 Functional Diagram
Functional Diagrams (continued)
OV
(UV)
UV
0.4255V +5%
+10%
+15%
VCC2
0.4255V -5%
-10%
-15%
MAX6760/MAX6761/MAX6762
(SUFFIXES LA, TA, RA, ZA, WA, AA)
V+
R1
R2
( ) MAX6761 ONLY.
Figure 5. Setting the Threshold Voltage of VCC2
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
14 ______________________________________________________________________________________
Choose R2 to have a resistance of up to 500kΩ.
Calculate R1 by:
R1 = ((V+- 0.4255V) x R2) / 0.4255V
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
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 26kΩresistor.
Overvoltage Latch Control Input
(OVLATCH)
The MAX6760/MAX6761/MAX6762 provide an overvolt-
age 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.
Reset, Undervoltage, and Overvoltage
Outputs (RESET,
RESET
,
UV
, UV, OV)
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 peri-
od when the monitored supply rises above the UVTH
threshold or drops below the OVTH threshold. The
push-pull versions are referenced to VCC.
The MAX6760/MAX6761/MAX6762 monitor both VCC
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.
INTERNAL
REFERENCE
0.5V
GND
OV MONITOR
UV MONITOR
OVTH
UVTH
UV
OV
UVIN
VCC
OVIN
MAX6763/MAX6764
V+
R1
R2
R3
OVERVOLTAGE ASSERTS WHEN
UNDERVOLTAGE ASSERTS WHEN
V+ x R3
R1 + R2 + R3 > 0.5V
< 0.5V
V+ x (R2 + R3)
R1 + R2 + R3
Figure 6. Setting the Under/Overvoltage Window
MR
RESET, UV
tD-MR
tMR_P
Figure 7a. Manual Reset/
Reset
Timing Diagram
tD-UV
tRP
VCC
RESET, UV
(RESET IS THE COMPLEMENT OF RESET)
Figure 7b. VCC/RESET,
UV
Timing Diagram
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
______________________________________________________________________________________ 15
Applications Information
Microprocessor Monitoring
Figure 8 shows a microprocessor monitoring circuit. An
overvoltage condition on either the core or I/O supply
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 tran-
sient immunity against nuisance trips.
MAX6760
GND
SET
VCC2
VCC
UV
OV
MR
OVLATCH
PUSH BUTTON
RESET
NMI
I/O
DC-DC
CONVERTER
CORE
DC-DC
CONVERTER
µP
I/O
CORE
FUSE
UNREGULATED
POWER SOURCE
SCR 100kΩ100kΩ
100kΩ
*C1
1µF*OPTIONAL.
Figure 8. Microprocessor Monitoring
Selector Guide
PUSH-PULL
RESET
PUSH-PULL
RESET
OPEN-DRAIN
RESET
PUSH-PULL
UV
PUSH-PULL
UV
OPEN-DRAIN
UV
PUSH-PULL
OV
OPEN-DRAIN
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
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
16 ______________________________________________________________________________________
Ordering Information (continued)
PART* 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
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 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
ZI 2.5 1.5
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*
*See the Setting the Adjustable Nominal Voltage Threshold section.
Table 3. Timeout Period Suffix Guide
ACTIVE TIMEOUT PERIOD
TIMEOUT
PERIOD SUFFIX
MIN (ms) TYP (MS)
MAX (ms)
D0 — 0.02 —
D3 100 185 320
*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 time-
out 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.
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
______________________________________________________________________________________ 17
Standard Versions Table
PART TOP MARK
MAX6754UKLD0 AEOC
MAX6754UKLD3 AEJN
MAX6754UKTD0 AEOD
MAX6754UKTD3 AEJO
MAX6754UKZD0 AEJQ
MAX6754UKZD3 AEOF
MAX6754UKWD0 AEOG
MAX6754UKWD3 AEJR
MAX6755UKLD0 AEOH
MAX6755UKLD3 AEJS
MAX6755UKTD0 AEOI
MAX6755UKTD3 AEJT
MAX6755UKZD0 AEKV
MAX6755UKZD3 AEOK
MAX6755UKWD0 AEOL
MAX6755UKWD3 AEJW
MAX6756UKLD0 AEJX
MAX6756UKLD3 AEOM
MAX6756UKTD0 AEJY
MAX6756UKTD3 AEON
MAX6756UKZD0 AEOP
MAX6756UKZD3 AEKA
MAX6756UKWD0 AEKB
MAX6756UKWD3 AEOQ
MAX6757UTTD0 ABST
MAX6757UTTD3 ABRB
MAX6757UTLD0 ABSO
MAX6757UTLD3 ABRC
MAX6757UTZD0 ABRE
MAX6757UTZD3 ABSW
MAX6757UTWD0 ABSX
MAX6757UTWD3 ABRF
PART TOP MARK
MAX6758UTLD0 ABSY
MAX6758UTLD3 ABRG
MAX6758UTTD0 ABSZ
MAX6758UTTD3 ABRH
MAX6758UTZD0 ABRJ
MAX6758UTZD3 ABTB
MAX6758UTWD0 ABTC
MAX6758UTWD3 ABRK
MAX6759UTLD0 ABRL
MAX6759UTLD3 ABTD
MAX6759UTTD0 ABRM
MAX6759UTTD3 ABTE
MAX6759UTZD0 ABTG
MAX6759UTZD3 ABRO
MAX6759UTWD0 ABRP
MAX6759UTWD3 ABTH
MAX6760TALTD3 AIO
MAX6760TALAD3 AHI
MAX6760TATZD3 AIR
MAX6760TATWD3 AHJ
MAX6760TATAD3 AIT
MAX6760TARAD3 AIV
MAX6760TAZWD3 AIX
MAX6760TAZAD3 AIZ
MAX6760TAWED3 AJB
MAX6760TAWAD3 AHL
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
18 ______________________________________________________________________________________
Standard Versions Table (continued)
PART TOP MARK
MAX6761TALTD3 AJD
MAX6761TALAD3 AHN
MAX6761TATZD3 AJG
MAX6761TATWD3 AHO
MAX6761TATAD3 AJI
MAX6761TARAD3 AJK
MAX6761TAZWD3 AJM
MAX6761TAZAD3 AJO
MAX6761TAWED3 AJQ
MAX6761TAWAD3 AHQ
PART TOP MARK
MAX6762TALTD3 AJT
MAX6762TALAD3 AHR
MAX6762TATZD3 AJW
MAX6762TATWD3 AJY
MAX6762TATAD3 AKA
MAX6762TARAD3 AKB
MAX6762TAZWD3 AHT
MAX6762TAZAD3 AKE
MAX6762TAWED3 AKF
MAX6762TAWAD3 AKH
MAX6763UT ABRQ
MAX6764UT ABRR
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
______________________________________________________________________________________ 19
Chip Information
TRANSISTOR COUNT: 726
PROCESS: BiCMOS
GND
RESET (RESET)MR
15SETVCC
MAX6754
MAX6755
MAX6756
SOT23
( ) MAX6755 ONLY.
TOP VIEW
2
34
GND
UV (UV)
16SET
5OV
VCC
MAX6757
MAX6758
MAX6759
SOT23
( ) MAX6758 ONLY.
2
34
MR
1
2
3
4
8
7
6
5
MR
OVLATCH
UV (UV)
OV
SET
VCC2
GND
VCC
MAX6760
MAX6761
MAX6762
TDFN
( ) MAX6761 ONLY.
GND
UV
16OVIN
5OV
VCC
MAX6763
MAX6764
SOT23
2
34
UVIN
Pin Configurations
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
20 ______________________________________________________________________________________
6, 8, &10L, DFN THIN.EPS
H1
2
21-0137
PACKAGE OUTLINE, 6,8,10 & 14L,
TDFN, EXPOSED PAD, 3x3x0.80 mm
COMMON DIMENSIONS
SYMBOL MIN. MAX.
A0.700.80
D2.903.10
E2.903.10
A1 0.00 0.05
L0.200.40
PKG. CODE N D2 E2 eJEDEC SPEC b[(N/2)-1] x e
PACKAGE VARIATIONS
0.25 MIN.k
A2 0.20 REF.
2.30±0.101.50±0.106T633-1 0.95 BSC MO229 / WEEA 1.90 REF0.40±0.05
1.95 REF0.30±0.050.65 BSC2.30±0.108T833-1
2.00 REF0.25±0.050.50 BSC2.30±0.1010T1033-1
2.40 REF0.20±0.05- - - - 0.40 BSC1.70±0.10 2.30±0.1014T1433-1
1.50±0.10
1.50±0.10
MO229 / WEEC
MO229 / WEED-3
0.40 BSC - - - - 0.20±0.05 2.40 REFT1433-2 14 2.30±0.101.70±0.10
T633-2 6 1.50±0.10 2.30±0.10 0.95 BSC MO229 / WEEA 0.40±0.05 1.90 REF
T833-2 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF
T833-3 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF
-DRAWING NOT TO SCALE-
H
2
2
21-0137
PACKAGE OUTLINE, 6,8,10 & 14L,
TDFN, EXPOSED PAD, 3x3x0.80 mm
2.30±0.10 MO229 / WEED-3 2.00 REF0.25±0.05
0.50 BSC
1.50±0.1010T1033-2
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.)
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
______________________________________________________________________________________ 21
SOT-23 5L .EPS
E
1
1
21-0057
PACKAGE OUTLINE, SOT-23, 5L
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.)
MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
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.
6LSOT.EPS
PACKAGE OUTLINE, SOT 6L BODY
21-0058
1
1
G
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.)