MAX6333UR19D3-T ,Ultra-low-voltage, low power microprocessor reset circuit. Reset threshold(typ) 1.9V, reset timeout(min) 100ms.applications, the MAX6332/MAX6333/MAX6334MAX6326/MAX6327/MAX6328come packaged in a 3-pin SOT23.
MAX6334UR16D2+T ,3-Pin, Ultra-Low-Voltage, Low-Power µP Reset CircuitsApplications®● Pentium II ComputersTypical Operating Circuit● Computers● ControllersV● Intelligent ..
MAX6334UR16D2-T ,Ultra-low-voltage, low power microprocessor reset circuit. Reset threshold(typ) 1.6V, reset timeout(min) 20ms.FeaturesThe MAX6332/MAX6333/MAX6334 microprocessor (µP)' Ultra-Low 0.7V Operating Supply Voltagesup ..
MAX6334UR16D2-T ,Ultra-low-voltage, low power microprocessor reset circuit. Reset threshold(typ) 1.6V, reset timeout(min) 20ms.ELECTRICAL CHARACTERISTICS(V = full range, T = -40°C to +85°C, unless otherwise noted. Typical valu ..
MAX6334UR16D3-T ,3-Pin, Ultra-Low-Voltage, Low-Power レP Reset CircuitsApplicationsPentium II™ ComputersComputersOrdering InformationControllersPART* TEMP. RANGE PIN-PACK ..
MAX6334UR17D3-T ,Ultra-low-voltage, low power microprocessor reset circuit. Reset threshold(typ) 1.7V, reset timeout(min) 100ms.MAX6332/MAX6333/MAX633419-1411; Rev 0; 12/983-Pin, Ultra-Low-Voltage, Low-Power µP Reset Circuits
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MAX6333UR19D3-T-MAX6334UR16D2-T-MAX6334UR17D3-T
Ultra-low-voltage, low power microprocessor reset circuit. Reset threshold(typ) 1.6V, reset timeout(min) 1ms.
General DescriptionThe MAX6332/MAX6333/MAX6334 microprocessor (µP)
supervisory circuits monitor the power supplies in 1.8V
to 3.3V µP and digital systems. They increase circuit
reliability and reduce cost by eliminating external com-
ponents and adjustments.
These devices perform a single function: they assert a
reset signal whenever the VCCsupply voltage declines
below a preset threshold, keeping it asserted for a pre-
set timeout period after VCChas risen above the reset
threshold. The only difference among the three devices
is their output. The MAX6333 (push/pull) and MAX6334
(open-drain) have an active-low RESEToutput, while
the MAX6332 (push/pull) has an active-high RESET out-
put. The MAX6332/MAX6333 are guaranteed to be in
the correct state for VCCdown to 0.7V. The MAX6334 is
guaranteed to be in the correct 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 (2,500 piece minimum-order quantity); con-
tact the factory for availability of nonstandard versions
(10,000 piece minimum-order quantity). For space-criti-
cal applications, the MAX6332/MAX6333/MAX6334
come packaged in a 3-pin SOT23.
ApplicationsPentium II™ Computers
Computers
Controllers
Intelligent Instruments
Critical µP/µC Power Monitoring
Portable/Battery-Powered Equipment
Automotive
FeaturesUltra-Low 0.7V Operating Supply VoltageLow 3.3µA Supply CurrentPrecision Monitoring of 1.8V and 2.5V Power-
Supply VoltagesReset Thresholds Available from 1.6V to 2.5V,
in Approximately 100mV IncrementsFully Specified over TemperatureThree Power-On Reset Pulse Widths Available
(1ms min, 20ms min, 100ms min)Low CostThree Available Output Structures: Push/PullRESET, Push/Pull RESET, Open-Drain RESET
Guaranteed RESET/RESETValid to VCC= 0.7V
(MAX6332/MAX6333)Power-Supply Transient ImmunityNo External Components3-Pin SOT23 PackagePin-Compatible with MAX809/MAX810 and
MAX6326/MAX6327/MAX6328
MAX6332/MAX6333/MAX6334
3-Pin, Ultra-Low-Voltage, Low-Power
µP Reset Circuits19-1411; 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.
MAX6332/MAX6333/MAX6334
3-Pin, Ultra-Low-Voltage, Low-Power
µP Reset Circuits
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VCC= full range, 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, RESET.......................-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)
SOT23-3 (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
3-Pin, Ultra-Low-Voltage, Low-Power
µP Reset Circuits
Typical Operating Characteristics(Reset not asserted, TA= +25°C, unless otherwise noted.)
MAX6332/MAX6333/MAX6334
Pin Description
MAX6332/MAX6333/MAX6334
3-Pin, Ultra-Low-Voltage, Low-Power
µP Reset Circuits
______________Applications Information
Interfacing to µPs with Bidirectional
Reset PinsSince the RESEToutput on the MAX6334 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 VCCTransientsIn 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 VCC
transients (glitches). The Typical Operating Characteristics
show the Maximum Transient Duration vs. Reset
Comparator Overdrive graph. The graph shows the maxi-
mum pulse width that a negative-going VCC transient may
typically have without issuing a reset signal. As the ampli-
tude of the transient increases, the maximum allowable
pulse width decreases.
Ensuring a Valid Reset Output
Down to VCC= 0When 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 MAX6333, where RESETmust be valid down to 0,
adding a pull-down resistor between RESETand GND
removes stray leakage currents, holding RESETlow
(Figure 2a). The pull-down resistor value is not critical;
100kWis large enough not to load RESETand small
enough to pull it low. For the MAX6332, where RESET
must be valid to VCC= 0, a 100kWpull-up resistor
between RESET and VCCwill hold RESET high when
VCCfalls below 0.7V (Figure 2b).
Since the MAX6334 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.
* 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
3-Pin, Ultra-Low-Voltage, Low-Power
µP Reset Circuits
MAX6332/MAX6333/MAX6334
Pin Configuration
Selector Guide (standard versions*)
Typical Operating Circuit* Sample stock is generally held on all standard versions.
MAX6332/MAX6333/MAX6334
3-Pin, Ultra-Low-Voltage, Low-Power
µP Reset CircuitsMaxim 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.
TRANSISTOR COUNT:505
Chip Information
Package Information
