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MAX6336US16D3-T |MAX6336US16D3TMAXN/a2502avai4-Pin, Ultra-Low-Voltage, Low-Power レP Reset Circuits with Manual Reset
MAX6336US23D3-T |MAX6336US23D3TMAXN/a4105avai4-Pin, Ultra-Low-Voltage, Low-Power レP Reset Circuits with Manual Reset
MAX6337US16D3-T |MAX6337US16D3TMAXN/a1842avai4-Pin, Ultra-Low-Voltage, Low-Power レP Reset Circuits with Manual Reset
MAX6337US16D3-T |MAX6337US16D3TMAXIMN/a2034avai4-Pin, Ultra-Low-Voltage, Low-Power レP Reset Circuits with Manual Reset
MAX6337US18D3-T |MAX6337US18D3TMAX N/a1061avai4-Pin, Ultra-Low-Voltage, Low-Power レP Reset Circuits with Manual Reset
MAX6337US23D3-T |MAX6337US23D3TMAXIMN/a2489avai4-Pin, Ultra-Low-Voltage, Low-Power レP Reset Circuits with Manual Reset


MAX6336US23D3-T ,4-Pin, Ultra-Low-Voltage, Low-Power レP Reset Circuits with Manual ResetFeaturesThe MAX6335/MAX6336/MAX6337 microprocessor (µP)' Ultra-Low 0.7V Operating Supply Voltagesup ..
MAX6337US16D3+T ,4-Pin, Ultra Low-Voltage, Low-Power µP Reset Circuits with Manual ResetApplications Ordering InformationPentium II™ ComputersPART* TEMP. RANGE PIN-PACKAGEComputers MAX633 ..
MAX6337US16D3-T ,4-Pin, Ultra-Low-Voltage, Low-Power レP Reset Circuits with Manual ResetMAX6335/MAX6336/MAX633719-1412; Rev 0; 12/984-Pin, Ultra-Low-Voltage, Low-Power µP Reset Circuits w ..
MAX6337US16D3-T ,4-Pin, Ultra-Low-Voltage, Low-Power レP Reset Circuits with Manual ResetApplicationsPentium II™ Computers Ordering InformationComputersPART* TEMP. RANGE PIN-PACKAGEControl ..
MAX6337US18D3-T ,4-Pin, Ultra-Low-Voltage, Low-Power レP Reset Circuits with Manual ResetApplicationsPentium II™ Computers Ordering InformationComputersPART* TEMP. RANGE PIN-PACKAGEControl ..
MAX6337US22D2+T ,4-Pin, Ultra Low-Voltage, Low-Power µP Reset Circuits with Manual ResetFeaturesThe MAX6335/MAX6336/MAX6337 microprocessor (µP)♦ Ultra-Low 0.7V Operating Supply Voltagesup ..
MB15C103 ,IF Band PLL Frequency SynthesizerFEATURES• Low power supply current: ICC = 0.9 mA typ. (VCC = 3 V, 200MHz)• Pulse swallow function ..
MB15E03 ,Single Serial Input PLL Frequency Synthesizer On-Chip 1.2 GHz Prescaler FUJITSU SEMICONDUCTORDS04-21340-2EDATA SHEETASSPSingle Serial InputPLL ..
MB15E03L ,Single Serial Input PLL Frequency Synthesizer On-Chip 1.2 GHz Prescaler FUJITSU SEMICONDUCTORDS04-21352-1EDATA SHEETASSPSingle Serial InputPLL ..
MB15E03LPV ,Single Serial Input PLL Frequency Synthesizer On-Chip 1.2 GHz Prescaler FUJITSU SEMICONDUCTORDS04-21352-1EDATA SHEETASSPSingle Serial InputPLL ..
MB15E05 , ASSP Single Serial Input PLL Frequency Synthesizer On-Chip 2.0GHz Prescaler
MB15E05 , ASSP Single Serial Input PLL Frequency Synthesizer On-Chip 2.0GHz Prescaler


MAX6336US16D3-T-MAX6336US23D3-T-MAX6337US16D3-T-MAX6337US18D3-T-MAX6337US23D3-T
4-Pin, Ultra-Low-Voltage, Low-Power レP Reset Circuits with Manual Reset
General Description
The MAX6335/MAX6336/MAX6337 microprocessor (µP)
supervisory circuits monitor the power supplies in 1.8V
to 3.3V µP and digital systems. They increase circuit reli-
ability and reduce cost by eliminating external compo-
nents and adjustments. They also feature a debounced
manual-reset input.
These devices perform a single function: they assert a
reset signal whenever the VCCsupply voltage declines
below a preset threshold or whenever manual reset is
asserted. Reset remains asserted for a preset timeout
period after VCChas risen above the reset threshold or
after manual reset is deasserted. The only difference
among the three devices is their output. The MAX6336
(push/pull) and MAX6337 (open-drain) have an active-
low RESEToutput, while the MAX6335 (push/pull) has
an active-high RESET output. The MAX6335/MAX6336
are guaranteed to be in the correct state for VCCdown
to 0.7V. The MAX6337 is guaranteed to be in the cor-
rect state for VCCdown to 1.0V.
The reset comparator in these ICs is designed to ignore
fast transients on VCC. Reset thresholds are factory-
trimmable between 1.6V and 2.5V, in approximately
100mV increments. There are 15 standard versions
available (2500 piece minimum-order quantity); contact
the factory for availability of nonstandard versions
(10,000 piece minimum-order quantity). For space-criti-
cal applications, the MAX6335/MAX6336/MAX6337
come packaged in a 4-pin SOT143.
Applications

Pentium II™ Computers
Computers
Controllers
Intelligent Instruments
Critical µP/µC Power Monitoring
Portable/Battery-Powered Equipment
Automotive
Features
Ultra-Low 0.7V Operating Supply VoltageLow 3.3µA Supply CurrentPrecision Monitoring of 1.8V and 2.5V Power-
Supply Voltages
Reset Thresholds Available from 1.6V to 2.5V,
in Approximately 100mV Increments
Debounced Manual Reset Fully Specified over TemperatureThree Power-On Reset Pulse Widths Available
(1ms min, 20ms min, 100ms min)
Low CostThree Available Output Structures: Push/Pull
RESET, Push/Pull RESET, Open-Drain RESETGuaranteed RESET/RESETValid to VCC= 0.7V
(MAX6335/MAX6336)
Power-Supply Transient ImmunityNo External Components4-Pin SOT143 PackagePin-Compatible with MAX811/MAX812 and
MAX6314/MAX6315
MAX6335/MAX6336/MAX6337
4-Pin, Ultra-Low-Voltage, Low-Power
µP Reset Circuits with Manual Reset

19-1412; Rev 0; 12/98
Ordering Information
Typical Operating Circuit and Pin Configuration appear
at end of data sheet.
Selector Guide appears at end of data sheet.

Pentium II is a trademark of Intel Corp.
MAX6335/MAX6336/MAX6337
4-Pin, Ultra-Low-Voltage, Low-Power
µP Reset Circuits with Manual Reset
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS

(VCC= full range, MR= VCCor unconnected, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C and
VCC= 3V, reset not asserted.)
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)
VCC......................................................................-0.3V to +6V
Push/Pull RESET or RESET, MR............-0.3V to (VCC+ 0.3V)
Open-Drain RESET..............................................-0.3V to +6V
Input Current (VCC).............................................................20mA
Output Current (RESET, RESET).........................................20mA
Rate of Rise, VCC............................................................100V/µs
Continuous Power Dissipation (TA= +70°C)
SOT143 (derate 4mW/°C above +70°C).....................320mW
Operating Temperature Range...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10sec).............................+300°C
4-Pin, Ultra-Low-Voltage, Low-Power
µP Reset Circuits with Manual Reset
__________________________________________Typical Operating Characteristics

(Reset not asserted, TA= +25°C, unless otherwise noted.)
MAX6335/MAX6336/MAX6337
MAX6335/MAX6336/MAX6337
4-Pin, Ultra-Low-Voltage, Low-Power
µP Reset Circuits with Manual Reset
Pin Description
Applications Information
Manual-Reset Inputs

Many µP-based products require manual-reset capabil-
ity, allowing the operator, a test technician, or external
logic circuitry to initiate a reset. A logic low on MR
asserts reset. Reset remains asserted while MRis low,
and for the reset active timeout period after MRreturns
high. MRhas an internal 20kΩpull-up resistor, so it can
be left unconnected if not used. Connect a normally
open momentary switch from MRto GND to create a
manual-reset function; external debounce circuitry is
not required.
Interfacing to µPs with
Bidirectional Reset Pins

Since the RESEToutput on the MAX6337 is open-drain,
this device interfaces easily with µPs that have bidirec-
tional reset pins, such as the Motorola 68HC11.
Connecting the µP supervisor’s RESEToutput directly
to the microcontroller’s (µC’s) RESETpin with a single
pull-up resistor allows either device to assert reset
(Figure 1).
Negative-Going VCCTransients

In addition to issuing a reset to the µP during power-up,
power-down, and brownout conditions, these devices
are relatively immune to short-duration, negative-going
VCCtransients (glitches). TheTypical Operating
Characteristicsshow the Maximum Transient Duration
vs. Reset Comparator Overdrive graph. The graph
shows the maximum pulse width that a negative-going
VCCtransient may typically have without issuing a reset
signal. As the amplitude of the transient increases, the
maximum allowable pulse width decreases.
Ensuring a Valid Reset Output
down to VCC = 0

When VCCfalls below 1V and approaches the minimum
operating voltage of 0.7V, push/pull-structured reset
sinking (or sourcing) capabilities decrease drastically.
High-impedance CMOS-logic inputs connected to the
RESETpin can drift to indeterminate voltages. This
does not present a problem in most cases, since most
µPs and circuitry do not operate at VCCbelow 1V. For
the MAX6336, where RESETmust be valid down to 0,
adding a pull-down resistor between RESETand GND
removes stray leakage currents, holding RESETlow
4-Pin, Ultra-Low-Voltage, Low-Power
µP Reset Circuits with Manual Reset
MAX6335/MAX6336/MAX6337
Factory-trimmed reset thresholds are available in approximately
100mV increments, with a ±1.8% room-temperature variance.
Table 1. Factory-Trimmed Reset
Thresholds*

Figure 2. Ensuring Reset Valid down to VCC= 0
(Figure 2a). The pull-down resistor value is not critical;
100kΩis large enough not to load RESET, and small
enough to pull it low. For the MAX6335, where RESET
must be valid to VCC= 0, a 100kΩpull-up resistor
between RESET and VCCwill hold RESET high when
VCCfalls below 0.7V (Figure 2b).
Since the MAX6337 has an open-drain, active-low out-
put, it typically uses a pull-up resistor. With this device,
RESET will most likely not maintain an active condition,
but will drift to a non-active level due to the pull-up
resistor and the reduced sinking capability of the open-
drain device. Therefore, this device is not recommend-
ed for applications where the RESETpin is required to
be valid down to VCC= 0.
MAX6335/MAX6336/MAX6337
4-Pin, Ultra-Low-Voltage, Low-Power
µP Reset Circuits with Manual Reset
Selector Guide (standard versions*)
Pin ConfigurationTypical Operating Circuit

* Sample stock is generally held on all standard versions.
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