MAX6327UR31-T ,3-Pin, Ultra-Low-Power SC70/SOT レP Reset CircuitsFeaturesThe MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/ Ultra-Low 1µA (max) Supply CurrentMAX6348 mi ..
MAX6328-22W ,3-pin ultra-low power SC70/SOT microprocessor reset circuit
MAX6328-23D ,3-pin ultra-low power SC70/SOT microprocessor reset circuit
MAX6328-29W ,3-pin ultra-low power SC70/SOT microprocessor reset circuit
MAX6328UR22 ,3-Pin, Ultra-Low-Power SC70/SOT µP Reset CircuitsMAX6326/MAX6327/ 3-Pin, Ultra-Low-Power SC70/SOT MAX6328/MAX6346/ μP Reset CircuitsMAX6347/MAX6348
MAX6328UR22-T ,3-Pin, Ultra-Low-Power SC70/SOT レP Reset CircuitsApplicationsMAX6328UR_ _-T -40°C to +85°C 3 SOT23-3MAX6346XR_ _-T -40°C to +85°C 3 SC70-3Computers ..
MB1519 ,DUAL SERIAL INPUT PLL FREQUENCY SYNTHESIZERDS04–21314–1EDATA SHEETMB1519 ASSPDUAL SERIAL INPUT PLL FREQUENCY SYNTHESIZERDUAL SERIAL INPUT PLL ..
MB15A02 , SERIAL INPUT PLL FREQUENCY SYNTHESIZER
MB15A02 , SERIAL INPUT PLL FREQUENCY SYNTHESIZER
MB15C03 ,Single Serial Input PLL Frequency Synthesizer On-Chip prescalerFUJITSU SEMICONDUCTORDS04-21349-1EDATA SHEETASSPSingle Serial InputPLL Frequency SynthesizerOn-Chip ..
MB15C03 ,Single Serial Input PLL Frequency Synthesizer On-Chip prescalerFUJITSU SEMICONDUCTORDS04-21349-1EDATA SHEETASSPSingle Serial InputPLL Frequency SynthesizerOn-Chip ..
MB15C03PFV ,Single Serial Input PLL Frequency Synthesizer On-Chip prescalerFUJITSU SEMICONDUCTORDS04-21349-1EDATA SHEETASSPSingle Serial InputPLL Frequency SynthesizerOn-Chip ..
MAX6326UR22-T-MAX6326UR26-T-MAX6326XR25-T-MAX6327UR31-T-MAX6328UR22-T-MAX6328UR23-T-MAX6328UR25-T-MAX6328UR26-T-MAX6328UR29-T-MAX6328UR30-T-MAX6328UR31-T-MAX6328XR31-T-MAX6348UR33-T-MAX6348UR44-T-MAX6348UR46-T-MAX6348XR40-T
3-Pin, Ultra-Low-Power SC70/SOT レP Reset Circuits
General DescriptionThe MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/
MAX6348 microprocessor (µP) supervisory circuits moni-
tor the power supplies in µP and digital systems. These
devices provide excellent circuit reliability and low cost
by eliminating external components and adjustments
when used with 2.5V, 3V, 3.3V, and 5V powered circuits.
These circuits perform a single function: they assert a
reset signal whenever the VCCsupply voltage declines
below a preset threshold, keeping it asserted for at least
100ms after VCChas risen above the reset threshold.
The only difference between the devices is their output.
The MAX6326/MAX6346 (push-pull) and MAX6328/
MAX6348 (open-drain) have an active-low reset output.
The MAX6327/MAX6347 have an active-high push-pull
reset output. All of these parts are guaranteed to be in
the correct state for VCCdown to 1V. The reset compara-
tor is designed to ignore fast transients on VCC. Reset
thresholds are factory-trimmable between 2.2V and
4.63V, in approximately 100mV increments. Twenty-one
standard versions are available. Contact the factory for
availability of nonstandard versions.
Ultra-low supply currents (1µA max for the MAX6326/
MAX6327/MAX6328) make these parts ideal for use in
portable equipment. All six devices are available in
space-saving SOT23 and SC70 packages.
ApplicationsComputersIntelligent Instruments
ControllersAutomotive
Critical µP and µCPortable/Battery-Powered
Power MonitoringEquipment
FeaturesUltra-Low 1µA (max) Supply Current
(MAX6326/MAX6327/MAX6328)Precision Monitoring of 2.5V, 3V, 3.3V, and 5V
Power-Supply VoltagesReset Thresholds Available from 2.2V to 4.63VFully Specified Over Temperature100ms (min) Power-On Reset Pulse WidthLow CostAvailable in Three Versions: Push-Pull RESET,
Push-Pull RESET, and Open-Drain RESETPower-Supply Transient ImmunityNo External Components3-Pin SC70/SOT23 PackagesPin Compatible with MAX803/MAX809/MAX810
3-Pin, Ultra-Low-Power SC70/SOT
µP Reset Circuits
Pin Configuration19-1294; Rev 3; 1/00
Selector Guide appears at end of data sheet.
3-Pin, Ultra-Low-Power SC70/SOT
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.) (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.
Terminal Voltage (with respect to GND)
VCC...........................................................................-0.3V to +6V
RESET, RESET(push-pull).........................-0.3V to (VCC+ 0.3V)RESET(open drain)..................................................-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)
3-Pin SC70 (derate 2.7mW/°C above +70°C)...............174mW
3-Pin SOT23 (derate 4mW/°C above +70°C)................320mW
Operating Temperature Range...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
Note 1:Overtemperature limits are guaranteed by design and not production tested.
3-Pin, Ultra-Low-Power SC70/SOT
µP Reset Circuits
__________________________________________Typical Operating Characteristics(TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT vs. TEMPERATURE
MAX6326-01
TEMPERATURE (°C)
SUPPLY CURRENT (
POWER-DOWN RESET DELAY
vs. TEMPERATURE
MAX6326-02
TEMPERATURE (°C)
RESET DELAY (
POWER-UP RESET TIMEOUT
vs. TEMPERATURE
MAX6326-03
TEMPERATURE (°C)
POWER-UP RESET TIMEOUT (ms)
MAXIMUM TRANSIENT DURATION
vs. RESET THRESHOLD OVERDRIVE (SC70)
MAX6326-04
RESET THRESHOLD OVERDRIVE,
VTH - VCC (mV)
MAXIMUM TRANSIENT DURATION (
______________________________________________________________Pin Description
3-Pin, Ultra-Low-Power SC70/SOT
µP Reset Circuits
____________Applications Information
Interfacing to µPs with
Bidirectional Reset PinsSince the RESEToutput on the MAX6328/MAX6348 is
open drain, these devices interface easily with micro-
processors (µPs) that have bidirectional reset pins,
such as the Motorola 68HC11. Connecting the µP
supervisor’s RESEToutput directly to the microcon-
troller’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
VCCtransients (glitches).
The Typical Operating Characteristicsshow the Maxi-
mum Transient Duration vs. Reset Threshold Overdrive
graph, for which reset pulses are not generated. The
graph shows the maximum pulse width that a negative-
going VCCtransient may typically have when issuing a
reset signal. As the amplitude of the transient increas-
es, the maximum allowable pulse width decreases.
Table 1. Factory-Trimmed Reset Thresholds‡‡Factory-trimmed reset thresholds are available in approximately 100mV increments with a 1.5% room-temperature variance.
3-Pin, Ultra-Low-Power SC70/SOT
µP Reset Circuits
Table 1. Factory-Trimmed Reset Thresholds‡(continued)‡Factory-trimmed reset thresholds are available in approximately 100mV increments with a 1.5% room-temperature variance.
Table 2. Device Marking Codes and Minimum Order Increments
3-Pin, Ultra-Low-Power SC70/SOT
µP Reset Circuits
___________________Chip InformationTRANSISTOR COUNT: 419
Table 2. Device Marking Codes and Minimum Order Increments (continued)
Selector Guide
(standard versions*)*Sample stock is generally held on all standard versions.
