MAX6326 Fast Delivery |IC PHOENIX CO.,LIMITED

MAX6326 ,3-Pin, Ultra-Low-Power SC70/SOTµP Reset CircuitsApplications MAX6346XR_ _-T -40°C to +85°C 3 SC70-3● Computers Power MonitoringMAX6346UR_ _-T -40°C ..
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MAX6326
3-Pin, Ultra-Low-Power SC70/SOTµP Reset Circuits
General Description
The 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 VCC supply voltage declines
below a preset threshold, keeping it asserted for at least
100ms after VCC has risen above the reset threshold.
The only difference between the devices is their out-
put. 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 VCC down to 1V. The reset comparator is
designed to ignore fast transients on VCC. Reset thresh-
olds 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.
Applications
Features●Ultra-Low 1µA (max) Supply Current
(MAX6326/MAX6327/MAX6328)●Precision Monitoring of 2.5V, 3V, 3.3V, and 5V
Power-Supply Voltages●Reset Thresholds Available from 2.2V to 4.63V●Fully Specified Over Temperature●100ms (min) Power-On Reset Pulse Width●Low Cost●Available in Three Versions: Push-Pull RESET,
Push-Pull RESET, and Open-Drain RESET ●Power-Supply Transient Immunity●No External Components●3-Pin SC70/SOT23 Packages●Pin Compatible with MAX803/MAX809/MAX810
Selector Guide appears at end of data sheet.●Computers●Intelligent Instruments●Controllers●Critical µP and µC
Power Monitoring●Portable/Battery-Powered
Equipment
†The MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/
MAX6348 are available in factory-set VCC reset thresholds
from 2.2V to 4.63V, in approximately 0.1V increments. Choose
the desired reset-threshold suffix from Table 1 and insert it in
the blank spaces following “R”. There are 21 standard ver-
sions with a required order increment of 2500 pieces. Sample
stock is generally held on the standard versions only (see the
Selector Guide). Required order increment is 10,000 pieces for
nonstandard versions (Table 2). Contact factory for availability.
All devices available in tape-and-reel only.
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
PART†TEMP. RANGEPIN-PACKAGE
MAX6326XR_ _-T-40°C to +85°C3 SC70-3
MAX6326UR_ _-T-40°C to +85°C3 SOT23-3
MAX6327XR_ _-T-40°C to +85°C3 SC70-3
MAX6327UR_ _-T-40°C to +85°C3 SOT23-3
MAX6328XR_ _-T-40°C to +85°C3 SC70-3
MAX6328UR_ _-T-40°C to +85°C3 SOT23-3
MAX6346XR_ _-T-40°C to +85°C3 SC70-3
MAX6346UR_ _-T-40°C to +85°C3 SOT23-3
MAX6347XR_ _-T-40°C to +85°C3 SC70-3
MAX6347UR_ _-T-40°C to +85°C3 SOT23-3
MAX6348XR_ _-T-40°C to +85°C3 SC70-3
MAX6348UR_ _-T-40°C to +85°C3 SOT23-3VCC
(RESET) RESET
GND
( ) ARE FOR THE MAX6327/MAX6347.
MAX6326
MAX6327
MAX6328
MAX6346
MAX6347
MAX6348
SOT23-3/SC70-3
TOP VIEW
MAX6326/MAX6327/
MAX6328/MAX6346/
MAX6347/MAX6348
3-Pin, Ultra-Low-Power SC70/SOT μP Reset Circuits
Pin Coniguration
Ordering Information
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
(VCC = full range, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C and VCC = 3V.) (Note 1)
Note 1: Overtemperature limits are guaranteed by design and not production tested.
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
VCC Range
TA = 0°C to +70°C1.05.5TA = -40°C to +85°C1.25.5
Supply CurrentICC
MAX632_ only, VCC = 3.0V for VTH ≤ 2.93V,
VCC = 3.2V for VTH > 2.93V, no load0.51.0µA
VCC = 5.5V, no load1.01.75
Reset ThresholdVTHTable 1
TA = +25°CVTH -
1.5%VTHVTH +
1.5%
TA = -40°C to +85°CVTH -
2.5%VTHVTH +
2.5%
Reset Threshold Tempco∆VTH/°C40ppm/°C
VCC to Reset DelayVCC = VTH to (VTH - 100mV)20µs
Reset Active Timeout Period100185280ms
RESET Output Voltage
(MAX6326/MAX6328/
MAX6346/MAX6348)
VOL
ISINK = 1.6mA, VCC > 2.1V, reset asserted0.3
ISINK = 100µA, VCC ≥ 1.2V, reset asserted0.4
RESET Output Voltage
(MAX6326/MAX6346)VOH
ISOURCE = 500µA, VCC = 3.2V, MAX6326 only0.8 · VCCISOURCE = 800µA, VCC = 4.5V, VTH ≤ 4.38V0.8 · VCC
ISOURCE = 800µA, VCC = VTH(MAX), VTH ≥ 4.5V0.8 · VCC
RESET Output Voltage
(MAX6327/MAX6347)
VOHISOURCE = 500µA, VCC ≥ 2.1V, reset asserted0.8 · VCC
ISOURCE = 50µA, VCC ≥ 1.2V, reset asserted0.8 · VCC
VOL
ISINK = 1.2mA, VCC ≥ 3.2V, reset not asserted,
MAX6327 only0.3
ISINK = 3.2mA, VCC ≥ 4.5V, reset not asserted,
VTH ≤ 4.38V0.4
ISINK = 3.2mA, VCC = VTH(MAX), VTH ≥ 4.5V0.4
RESET Threshold
Hysteresis
MAX6326/MAX6327/MAX63286.3mVMAX6346/MAX6347/MAX63489.5
Open-Drain RESET
Output Leakage Current0.1µA
MAX6326/MAX6327/
MAX6328/MAX6346/
MAX6347/MAX6348
3-Pin, Ultra-Low-Power SC70/SOT μP Reset Circuits
Absolute Maximum Ratings
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.
Electrical Characteristics
(TA = +25°C, unless otherwise noted.)
PIN
NAMEFUNCTIONMAX6326/MAX6346
MAX6328/MAX6348
MAX6327
MAX63471GNDGround—RESET
Active-Low Reset Output. RESET remains low while VCC is below the reset
threshold and for at least 100ms after VCC rises above the reset threshold.
RESET is open-drain on the MAX6328/MAX6348 and push-pull on the
MAX6326/MAX6346.2RESETActive-High Reset Output. RESET remains high while VCC is below the reset
threshold and for at least 100ms after VCC rises above the reset threshold.
POWER-DOWN RESET DELAY
vs. TEMPERATURE
MAX6326 toc02
TEMPERATURE (°C)
RESET DELAY (µs)
VOD = 200mV
VOD = 10mV
VOD = 100mV
VOD = 20mV
POWER-UP RESET TIMEOUT
vs. TEMPERATURE
MAX6326 toc03
TEMPERATURE (°C)
POWER-UP RESET TIMEOUT (ms)
MAXIMUM TRANSIENT DURATION
vs. RESET THRESHOLD OVERDRIVE (SC70)
MAX6326 toc04
RESET THRESHOLD OVERDRIVE,
VTH - VCC (mV)
MAXIMUM TRANSIENT DURATION (µs)
SUPPLY CURRENT vs. TEMPERATURE
MAX6326 toc01
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
VCC = 3.3V
VCC = 5V
VCC = 1.2V
MAX6326/MAX6327/
MAX6328/MAX6346/
MAX6347/MAX6348
3-Pin, Ultra-Low-Power SC70/SOT μP Reset Circuits
Typical Operating Characteristics
Pin Description
Applications Information
Interfacing to µPs with
Bidirectional Reset Pins
Since the RESET output on the MAX6328/MAX6348 is
open drain, these devices interface easily with micropro-
cessors (µPs) that have bidirectional reset pins, such as
the Motorola 68HC11. Connecting the µP supervisor’s
RESET output directly to the microcontroller’s (µC’s)
RESET pin with a single pull-up resistor allows either
device to assert reset (Figure 1).
Negative-Going VCC Transients
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 VCC
transients (glitches).
The Typical Operating Characteristics show 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 VCC transient may typically have when issuing a
reset signal. As the amplitude of the transient increases,
the maximum allowable pulse width decreases.
Figure 1. Interfacing to μPs with Bidirectional Reset Pins
Table 1. Factory-Trimmed Reset Thresholds‡
PARTSUFFIX
RESET THRESHOLD VOLTAGE, VTH (V)
TA = +25°CTA = -40°C to +85°C
MINTYPMAXMINMAX
MAX632_ _R222.1672.2002.2332.1452.250
MAX632_ _R232.2852.3202.3552.2622.375
MAX632_ _R242.3642.4002.4362.3402.460
MAX632_ _R252.4622.5002.5372.4372.562
MAX632_ _R262.5912.6302.6692.5642.696
MAX632_ _R272.6602.7002.7412.6332.768
MAX632_ _R282.7582.8002.8422.7302.870
MAX632_ _R292.8862.9302.9742.8573.000
MAX632_ _R302.9553.0003.0452.9253.075
MAX632_ _R313.0343.0803.1263.0033.150
MAX634_ _R333.2503.3003.3503.2173.383
MAX634_ _R343.3493.4003.4513.3153.485
MAX634_ _R353.4473.5003.5523.4123.587
MAX634_ _R363.5463.6003.6543.5103.690
MAX634_ _R373.6443.7003.7553.6073.792
MAX634_ _R383.7433.8003.8573.7053.895
RESET
GND
RESET
INPUT
MAX6328
MAX6348MOTOROLA
68HCXX
GND
VCC
VCC
VCC
MAX6326/MAX6327/
MAX6328/MAX6346/
MAX6347/MAX6348
3-Pin, Ultra-Low-Power SC70/SOT μP Reset Circuits
‡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
Table 1. Factory-Trimmed Reset Thresholds‡ (continued)
PARTSUFFIX
RESET THRESHOLD VOLTAGE, VTH (V)
TA = +25°CTA = -40°C to +85°C
MINTYPMAXMINMAX
MAX634_ _R393.8413.9003.9583.8023.997
MAX634_ _R403.9404.0004.0603.9004.100
MAX634_ _R414.0384.1004.1613.9974.202
MAX634_ _R424.1374.2004.2634.0954.305
MAX634_ _R434.2354.3004.3644.1924.407
MAX634_ _R444.3144.3804.4464.2704.489
MAX634_ _R454.4324.5004.5674.3874.612
MAX634_ _R464.5604.6304.6994.5144.746
PARTTOP MARKORDER
INCREMENT (k)SOT23SC70
MAX6347_R46-TFZBWACF2.5
MAX6347_R45-TFZBV–10
MAX6347_R44-TFZBUACL2.5
MAX6347_R43-TFZBT–10
MAX6347_R42-TFZBS–10
MAX6347_R41-TFZBR–10
MAX6347_R40-TFZBQ–10
MAX6347_R39-TFZBP–10
MAX6347_R38-TFZBO–10
MAX6347_R37-TFZBN–10
MAX6347_R36-TFZBM–10
MAX6347_R35-TFZBL–10
MAX6347_R34-TFZBK–10
MAX6347_R33-TFZBJ–10
MAX6327_R31-TFMAAACT2.5
MAX6327_R30-TFNAA–10
MAX6327_R29-TFLAAACS2.5
MAX6327_R28-TFKAA–10
MAX6327_R27-TFJAA–10
MAX6327_R26-TFIAAACR2.5
MAX6327_R25-TFHAA–10
MAX6327_R24-TFGAA–10
MAX6327_R23-TFFAAACQ2.5
MAX6327_R22-TEIAAAAI2.5
PARTTOP MARKORDER INCREMENT(k)SOT23SC70
MAX6346_R46-TFZBIACO2.5
MAX6346_R45-TFZBH–10
MAX6346_R44-TFZBGACK2.5
MAX6346_R43-TFZBF–10
MAX6346_R42-TFZBE–10
MAX6346_R41-TFZBD–10
MAX6346_R40-TFZBC–10
MAX6346_R39-TFZBB–10
MAX6346_R38-TFZBA–10
MAX6346_R37-TFZAZ–10
MAX6346_R36-TFZAY–10
MAX6346_R35-TFZAX–10
MAX6346_R34-TFZAW–10
MAX6346_R33-TFZAV–10
MAX6326_R31-TFDAAACE2.5
MAX6326_R30-TFEAA–10
MAX6326_R29-TFCAAACP2.5
MAX6326_R28-TFBAA–10
MAX6326_R27-TFAAA–10
MAX6326_R26-TEZAAACI2.5
MAX6326_R25-TEYAA–10
MAX6326_R24-TEXAA–10
MAX6326_R23-TEWAAACH2.5
MAX6326_R22-TEHAAAAH2.5
MAX6326/MAX6327/
MAX6328/MAX6346/
MAX6347/MAX6348
3-Pin, Ultra-Low-Power SC70/SOT μP Reset Circuits
Table 2. Device Marking Codes and Minimum Order Increments (continued)
Selector Guide (standard versions*)
*Sample stock is generally held on all standard versions.
PARTTOP MARKORDER INCREMENT (k)SOT23SC70
MAX6348_R46-TSOT23SC70
MAX6348_R46-TFZCKACN2.5
MAX6348_R45-TFZCJ–10
MAX6348_R44-TFZCIACM2.5
MAX6348_R43-TFZCH–10
MAX6348_R42-TFZCG–10
MAX6348_R41-TFZCF–10
MAX6348_R40-TFZCE–10
MAX6348_R39-TFZCD–10
MAX6348_R38-TFZCC–10
MAX6348_R37-TFZCB–10
MAX6348_R36-TFZCA–10
MAX6348_R35-TFZBZ–10
PARTTOP MARKORDER INCREMENT (k)SOT23SC70
MAX6348_R34-TFZBY–10
MAX6348_R33-TFZBX–10
MAX6328_R31-TFVAAACW2.5
MAX6328_R30-TFWAA–10
MAX6328_R29-TFUAAACV2.5
MAX6328_R28-TFTAA–10
MAX6328_R27-TFSAA–10
MAX6328_R26-TFRAAACJ2.5
MAX6328_R25-TFQAA–10
MAX6328_R24-TFPAA–10
MAX6328_R23-TFOAAACU2.5
MAX6328_R22-TEJAAAAJ2.5
PARTNOMINAL VTH (V)
MAX634_ _R46-T4.63
MAX634_ _R44-T4.38
MAX632_ _R31-T3.08
MAX632_ _R29-T2.93
MAX632_ _R26-T2.63
MAX632_ _R23-T2.32
MAX632_ _R22-T2.20
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
3 SC70X3-221-007590-0208
3 SOT23U3-121-005190-0179
MAX6326/MAX6327/
MAX6328/MAX6346/
MAX6347/MAX6348
3-Pin, Ultra-Low-Power SC70/SOT μP Reset Circuits
Chip Information
TRANSISTOR COUNT: 419
Package Information
For the latest package outline information and land patterns
(footprints), go to www.maximintegrated.com/packages. Note
that a “+”, “#”, or “-” in the package code indicates RoHS status
only. Package drawings may show a different suffix character, but
the drawing pertains to the package regardless of RoHS status.

Partno	Mfg	Dc	Qty	Available	Descript
MAX6326	MAX	N/a	3000	avai	3-Pin, Ultra-Low-Power SC70/SOTµP Reset Circuits