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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX6348 Datasheet

3-Pin / Ultra-Low-Power SC70/SOT P Reset Circuits

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MAX6348 pdf
19-1294; Rev 3; 1/00
3-Pin, Ultra-Low-Power SC70/SOT
µP 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 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 VCC down 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.
Computers
Controllers
Critical µP and µC
Power Monitoring
Applications
Intelligent Instruments
Automotive
Portable/Battery-Powered
Equipment
Pin Configuration
TOP VIEW
GND 1
(RESET) RESET 2
MAX6326
MAX6327
MAX6328
MAX6346
MAX6347
MAX6348
3 VCC
Features
o Ultra-Low 1µA (max) Supply Current
(MAX6326/MAX6327/MAX6328)
o Precision Monitoring of 2.5V, 3V, 3.3V, and 5V
Power-Supply Voltages
o Reset Thresholds Available from 2.2V to 4.63V
o Fully Specified Over Temperature
o 100ms (min) Power-On Reset Pulse Width
o Low Cost
o Available in Three Versions: Push-Pull RESET,
Push-Pull RESET, and Open-Drain RESET
o Power-Supply Transient Immunity
o No External Components
o 3-Pin SC70/SOT23 Packages
o Pin Compatible with MAX803/MAX809/MAX810
Ordering Information
PART
MAX6326XR_ _-T
MAX6326UR_ _-T
MAX6327XR_ _-T
MAX6327UR_ _-T
MAX6328XR_ _-T
MAX6328UR_ _-T
MAX6346XR_ _-T
MAX6346UR_ _-T
MAX6347XR_ _-T
MAX6347UR_ _-T
MAX6348XR_ _-T
MAX6348UR_ _-T
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
3 SC70-3
3 SOT23-3
3 SC70-3
3 SOT23-3
3 SC70-3
3 SOT23-3
3 SC70-3
3 SOT23-3
3 SC70-3
3 SOT23-3
3 SC70-3
3 SOT23-3
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 versions with
a required order increment of 2500 pieces. Sample stock is gen-
erally held on the standard versions only (see the Selector
Guide). Required order increment is 10,000 pieces for nonstan-
dard versions (Table 2). Contact factory for availability. All
devices available in tape-and-reel only.
Selector Guide appears at end of data sheet.
SOT23-3/SC70-3
( ) ARE FOR THE MAX6327/MAX6347.
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX6348 Datasheet

3-Pin / Ultra-Low-Power SC70/SOT P Reset Circuits

No Preview Available !

MAX6348 pdf
3-Pin, Ultra-Low-Power SC70/SOT
µP Reset Circuits
ABSOLUTE MAXIMUM RATINGS
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
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
(VCC = full range, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C and VCC = 3V.) (Note 1)
PARAMETER
VCC Range
Supply Current
SYMBOL
ICC
CONDITIONS
TA = 0°C to +70°C
TA = -40°C to +85°C
MAX632_ only, VCC = 3.0V for VTH 2.93V,
VCC = 3.2V for VTH > 2.93V, no load
VCC = 5.5V, no load
Reset Threshold
VTH Table 1
TA = +25°C
TA = -40°C to +85°C
Reset Threshold Tempco
VCC to Reset Delay
Reset Active Timeout Period
RESET Output Voltage
(MAX6326/MAX6328/
MAX6346/MAX6348)
VTH/°C
VOL
RESET Output Voltage
(MAX6326/MAX6346)
VOH
VOH
RESET Output Voltage
(MAX6327/MAX6347)
VOL
RESET Threshold
Hysteresis
Open-Drain RESET Output
Leakage Current
VCC = VTH to (VTH - 100mV)
ISINK = 1.6mA, VCC > 2.1V, reset asserted
ISINK = 100µA, VCC 1.2V, reset asserted
ISOURCE = 500µA, VCC = 3.2V, MAX6326 only
ISOURCE = 800µA, VCC = 4.5V, VTH 4.38V
ISOURCE = 800µA, VCC = VTH(MAX), VTH 4.5V
ISOURCE = 500µA, VCC 2.1V, reset asserted
ISOURCE = 50µA, VCC 1.2V, reset asserted
ISINK = 1.2mA, VCC 3.2V, reset not asserted,
MAX6327 only
ISINK = 3.2mA, VCC 4.5V, reset not asserted,
VTH 4.38V
ISINK = 3.2mA, VCC = VTH(MAX), VTH 4.5V
MAX6326/MAX6327/MAX6328
MAX6346/MAX6347/MAX6348
MIN
1.0
1.2
VTH -
1.5%
VTH -
2.5%
100
TYP
0.5
1.0
VTH
VTH
40
20
185
0.8 · VCC
0.8 · VCC
0.8 · VCC
0.8 · VCC
0.8 · VCC
6.3
9.5
MAX
5.5
5.5
UNITS
V
1.0
µA
1.75
VTH +
1.5%
VTH +
2.5%
V
ppm/°C
µs
280 ms
0.3
V
0.4
V
0.3
V
0.4
0.4
mV
0.1 µA
Note 1: Overtemperature limits are guaranteed by design and not production tested.
2 _______________________________________________________________________________________


Part Number MAX6348
Description 3-Pin / Ultra-Low-Power SC70/SOT P Reset Circuits
Maker Maxim
Total Page 8 Pages
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