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MAX6733UTSVD3-T |MAX6733UTSVD3TMAXIMN/a2500avaiVcc1: 2.925 V, Vcc2: 1.575 V, active timeout period: 140 ms-280 ms, single/dual/triple-voltage mP supervisor circuit with independent watchdog output
MAX6734KASYD3-T |MAX6734KASYD3TMAXN/a2500avaiVcc1: 2.925 V, Vcc2: 2.188 V, active timeout period: 140 ms-280 ms, single/dual/triple-voltage mP supervisor circuit with independent watchdog output
MAX6735KASYD3-T |MAX6735KASYD3TMAXIMN/a2450avaiVcc1: 2.925 V, Vcc2: 2.188 V, active timeout period: 140 ms-280 ms, single/dual/triple-voltage mP supervisor circuit with independent watchdog output


MAX6733UTSVD3-T ,Vcc1: 2.925 V, Vcc2: 1.575 V, active timeout period: 140 ms-280 ms, single/dual/triple-voltage mP supervisor circuit with independent watchdog outputfeatures significantly improves systemVoltages Down to +0.63V (MAX6734/MAX6735 Only)reliability and ..
MAX6734KASYD3-T ,Vcc1: 2.925 V, Vcc2: 2.188 V, active timeout period: 140 ms-280 ms, single/dual/triple-voltage mP supervisor circuit with independent watchdog outputApplicationsonly the V 1 threshold suffix after the “UT.” Insert the resetCCMultivoltage Systems ti ..
MAX6735KASYD3-T ,Vcc1: 2.925 V, Vcc2: 2.188 V, active timeout period: 140 ms-280 ms, single/dual/triple-voltage mP supervisor circuit with independent watchdog outputELECTRICAL CHARACTERISTICS(V 1 = V 2 = +0.8V to +5.5V, T = -40°C to +85°C, unless otherwise noted. ..
MAX6735KATGD3+T ,Single-/Dual-/Triple-Voltage µP Supervisory Circuits with Independent Watchdog OutputFeaturesThe MAX6730–MAX6735 single/dual/triple-voltage micro- ● V 1 (Primary Supply) Reset Threshol ..
MAX6736XKTWD7 ,Low-Power Dual-/Triple-Voltage SC70 µP Supervisory CircuitsApplicationsof data sheet.Portable/Battery- ControllersPin Configurations, Typical Application Circ ..
MAX6737XKSFD3-T ,Vcc1: 2.925 V, Vcc2: 1.050 V, active timeout period: 150 ms-300 ms, low-power dual/triple-voltage mP supervisor circuitApplications (MAX6741/MAX6744)devices ideal for portable equipment. Power-Fail Input/Power-Fail Ou ..
MB3775PF , SWITCHING REGULATOR CONTROLLER
MB3776 ,Switching Regulator ControllerFEATURES• Wide supply voltage range: (2 V to 15 V)• Wide oscillation frequency range, high-frequenc ..
MB3776A ,Switching Regulator ControllerFUJITSU SEMICONDUCTORDS04-27201-3EDATA SHEETASSP For Power Supply
MB3776AP ,Switching Regulator ControllerFEATURES• Wide supply voltage range: (2 V to 15 V)• Wide oscillation frequency range, high-frequenc ..
MB3776APF ,Switching Regulator ControllerFUJITSU SEMICONDUCTORDS04-27201-3EDATA SHEETASSP For Power Supply
MB3776APFV ,Switching Regulator ControllerFEATURES• Wide supply voltage range: (2 V to 15 V)• Wide oscillation frequency range, high-frequenc ..


MAX6733UTSVD3-T-MAX6734KASYD3-T-MAX6735KASYD3-T
Vcc1: 4.625 V, active timeout period: 140 ms-280 ms, single/dual/triple-voltage mP supervisor circuit with independent watchdog output
General Description
The MAX6730–MAX6735 single-/dual-/triple-voltage
microprocessor (µP) supervisors feature a watchdog
timer and manual reset capability. The MAX6730–
MAX6735 offer factory-set reset thresholds for monitor-
ing voltages from +0.9V to +5V and an adjustable reset
input for monitoring voltages down to +0.63V. The com-
bination of these features significantly improves system
reliability and accuracy when compared to separate
ICs or discrete components.
The active-low reset output asserts and remains asserted
for the reset timeout period after all the monitored volt-
ages exceed their respective thresholds. Multiple factory-
set reset threshold combinations reduce the number of
external components required. The MAX6730/MAX6731
monitor a single fixed voltage, the MAX6732/MAX6733
monitor two fixed voltages, and the MAX6734/MAX6735
monitor two fixed voltages and one adjustable voltage. All
devices are offered with six minimum reset timeout peri-
ods ranging from 1.1ms to 1120ms.
The MAX6730–MAX6735 feature a watchdog timer with
an independent watchdog output. The watchdog timer
prevents system lockup during code execution errors.
A watchdog startup delay of 54s after reset asserts
allows system initialization during power-up. The watch-
dog operates in normal mode with a 1.68s delay after
initialization. The MAX6730/MAX6732/MAX6734 provide
an active-low, open-drain watchdog output. The
MAX6731/MAX6733/MAX6735 provide an active-low,
push-pull watchdog output.
Other features include a manual reset input (MAX6730/
MAX6731/MAX6734/MAX6735) and push-pull reset out-
put (MAX6731/MAX6733/MAX6735) or open-drain reset
output (MAX6730/MAX6732/MAX6734). The MAX6730–
MAX6733 are offered in a tiny SOT23-6 package. The
MAX6734/MAX6735 are offered in a space-saving
SOT23-8 package. All devices are fully specified over
the extended temperature range (-40°C to +85°C).
Applications

Multivoltage Systems
Telecom/Networking Equipment
Computers/Servers
Portable/Battery-Operated Equipment
Industrial Equipment
Printer/Fax
Set-Top Boxes
Features
VCC1 (Primary Supply) Reset Threshold Voltages
from +1.575V to +4.63V
VCC2 (Secondary Supply) Reset Threshold
Voltages from +0.79V to +3.08V
Adjustable RSTIN Threshold for Monitoring
Voltages Down to +0.63V (MAX6734/MAX6735 Only)
Six Reset Timeout OptionsWatchdog Timer with Independent Watchdog Output
35s (min) Initial Watchdog Startup Period
1.12s (min) Normal Watchdog Timeout Period
Manual Reset Input
(MAX6730/MAX6731/MAX6734/MAX6735)
Guaranteed Reset Valid down to
VCC1 or VCC2 = +0.8V
Push-Pull RESETor Open-Drain RESETOutputImmune to Short VCCTransientsLow Supply Current: 14µA (typ) at +3.6VSmall 6-Pin and 8-Pin SOT23 Packages
MAX6730–MAX6735
Single-/Dual-/Triple-Voltage µP Supervisory
Circuits with Independent Watchdog Output
Ordering Information

19-2629; Rev 2; 1/03
*Note:Insert the threshold level suffixes for VCC1 and VCC2
(Table 1) after “UT” or “KA.” For the MAX6730/MAX6731, insert
only the VCC1 threshold suffix after the “UT.” Insert the reset
timeout delay (Table 2) after “D” to complete the part number.
For example, the MAX6732UTLTD3-T provides a VCC1 threshold
of +4.625V, a VCC2 threshold of +3.075V, and a 210ms reset
timeout period. Sample stock is generally held on standard ver-
sions 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.
Typical Operating Circuit and Pin Configurations appear at end of data sheet.
MAX6730–MAX6735
Single-/Dual-/Triple-Voltage µP Supervisory
Circuits with Independent Watchdog Output
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS

(VCC1 = VCC2 = +0.8V to +5.5V, TA= -40°C to +85°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.
VCC1, VCC2, RSTIN, MR, WDI to GND.....................-0.3V to +6V
RST, WDOto GND (open drain)...............................-0.3V to +6VRST, WDOto GND (push-pull).................-0.3V to (VCC1 + 0.3V)
Input Current/Output Current (all pins)...............................20mA
Continuous Power Dissipation (TA= +70°C)
6-Pin SOT23-6 (derate 8.7mW/°C above +70°C)........696mW
8-Pin SOT23-8 (derate 8.9mW/°C above +70°C)........714mW
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
MAX6730–MAX6735
Single-/Dual-/Triple-Voltage µP Supervisory
Circuits with Independent Watchdog Output
ELECTRICAL CHARACTERISTICS (continued)

(VCC1 = VCC2 = +0.8V to +5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
MAX6730–MAX6735
Single-/Dual-/Triple-Voltage µP Supervisory
Circuits with Independent Watchdog Output
ELECTRICAL CHARACTERISTICS (continued)

(VCC1 = VCC2 = +0.8V to +5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
Note 1:
Devices tested at TA= +25°C. Overtemperature limits are guaranteed by design and not production tested.
Note 2:
Parameter guaranteed by design.
MAX6730–MAX6735
Single-/Dual-/Triple-Voltage µP Supervisory
Circuits with Independent Watchdog Output
Typical Operating Characteristics

(VCC1 = +5V, VCC2 = +3.3V, TA= +25°C, unless otherwise noted.)
MAX6730–MAX6735
Single-/Dual-/Triple-Voltage µP Supervisory
Circuits with Independent Watchdog Output
Typical Operating Characteristics (continued)

(VCC1 = +5V, VCC2 = +3.3V, TA= +25°C, unless otherwise noted.)
MAX6730–MAX6735
Single-/Dual-/Triple-Voltage µP Supervisory
Circuits with Independent Watchdog Output
Pin Description
MAX6730–MAX6735
Detailed Description
Supply Voltages

The MAX6730–MAX6735 microprocessor (µP) supervi-
sors maintain system integrity by alerting the µP to fault
conditions. The MAX6730–MAX6735 monitor one to
three supply voltages in µP-based systems and assert
an active-low reset output when any monitored supply
voltage drops below its preset threshold. The output
state remains valid for VCC1 or VCC2 greater than +0.8V.
Threshold Levels

The two-letter code in the Reset Voltage Threshold
Suffix Guide (Table 1) indicates the threshold level
combinations for VCC1 and VCC2.
Reset Output

The MAX6730–MAX6735 feature an active-low reset out-
put (RST). RSTasserts when the voltage at either VCC1 or
VCC2 falls below the voltage threshold level, VRSTIN
drops below its threshold, or MRis driven low (Figure 1).RSTremains low for the reset timeout period (Table 2)
after VCC1, VCC2, and RSTIN increase above their
respective thresholds and after MRreleases high.
Whenever VCC1, VCC2, or RSTIN go below the reset
threshold before the end of the reset timeout period, the
internal timer restarts. The MAX6730/MAX6732/ MAX6734
provide an open-drain RSToutput, and the MAX6731/
MAX6733/MAX6735 provide a push-pull RSToutput.
Single-/Dual-/Triple-Voltage µP Supervisory
Circuits with Independent Watchdog Output
Table 2. Reset Timeout Period Suffix Guide
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