19-1839; Rev 5; 7/12
SC70/µDFN, Single/Dual Low-Voltage,
Low-Power µP Reset Circuits
Features
The MAX6381–MAX6390 microprocessor (µP) supervisory
circuits monitor power-supply voltages from +1.8V to
+5.0V while consuming only 3µA of supply current at
+1.8V. Whenever VCC falls below the factory-set reset
thresholds, the reset output asserts and remains asserted for a minimum reset timeout period after VCC rises
above the reset threshold. Reset thresholds are available
from +1.58V to +4.63V, in approximately 100mV increments. Seven minimum reset timeout delays ranging
from 1ms to 1200ms are available.
The MAX6381/MAX6384/MAX6387 have a push-pull
active-low reset output. The MAX6382/MAX6385/
MAX6388 have a push-pull active-high reset output,
and the MAX6383/MAX6386/MAX6389/MAX6390
have an open-drain active-low reset output. The
MAX6384/MAX6385/MAX6386 also feature a
debounced manual reset input (with internal pullup
resistor). The MAX6387/MAX6388/MAX6389 have an
auxiliary input for monitoring a second voltage. The
MAX6390 offers a manual reset input with a longer VCC
reset timeout period (1120ms or 1200ms) and a shorter
manual reset timeout (140ms or 150ms).
The MAX6381/MAX6382/MAX6383 are available in
3-pin SC70 and 6-pin µDFN packages and the
MAX6384–MAX6390 are available in 4-pin SC70 and
6-pin µDFN packages.
o Factory-Set Reset Threshold Voltages Ranging
from +1.58V to +4.63V in Approximately 100mV
Increments
o ±2.5% Reset Threshold Accuracy Over
Temperature (-40°C to +125°C)
o Seven Reset Timeout Periods Available: 1ms,
20ms, 140ms, 280ms, 560ms, 1120ms,
1200ms (min)
o 3 Reset Output Options
Active-Low Push-Pull
Active-High Push-Pull
Active-Low Open-Drain
o Reset Output State Guaranteed Valid
Down to VCC = 1V
o Manual Reset Input (MAX6384/MAX6385/MAX6386)
o Auxiliary RESET IN (MAX6387/MAX6388/MAX6389)
o VCC Reset Timeout (1120ms or 1200ms)/Manual
Reset Timeout (140ms or 150ms) (MAX6390)
o Negative-Going VCC Transient Immunity
µ
o Low Power Consumption of 6µA at +3.6V
µ
and 3µA at +1.8V
o Pin Compatible with
MAX809/MAX810/MAX803/MAX6326/MAX6327/
MAX6328/MAX6346/MAX6347/MAX6348,
and MAX6711/MAX6712/MAX6713
o Tiny 3-Pin/4-Pin SC70 and 6-Pin µDFN Packages
Applications
Computers
Critical µP and µC
Power Monitoring
Controllers
Ordering Information
Portable/BatteryPowered Equipment
Intelligent Instruments
Dual Voltage Systems
Pin Configurations
TOP VIEW
GND
N.C.
6
5
VCC
4
GND 1
RESET
(RESET) 2
MAX6381
MAX6382
MAX6383
SC70
( ) IS FOR MAX6382
3
MAX6381
MAX6382
MAX6383
VCC
1
2
3
RESET
(RESET)
N.C.
N.C
µDFN
Pin Configurations continued at end of data sheet.
PART
TEMP RANGE
PINPACKAGE
MAX6381LT_ _D_+T
-40°C to +125°C
6 µDFN
MAX6381XR_ _D_+T
-40°C to +125°C
3 SC70
MAX6381XR_ _D_/V+T
-40°C to +125°C
3 SC70
MAX6382LT_ _D_+T
-40°C to +125°C
6 µDFN
MAX6382XR_ _D_+T
-40°C to +125°C
3 SC70
Note: Insert reset threshold suffix (see Reset Threshold table)
after "XR", "XS", or "LT." Insert reset timeout delay (see Reset
Timeout Delay table) after "D" to complete the part number.
Sample stock is generally held on standard versions only (see
Standard Versions table). Standard versions have an order
increment requirement of 2500 pieces. Nonstandard versions
have an order increment requirement of 10,000 pieces.
Contact factory for availability of nonstandard versions.
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
Ordering Information continued at end of data sheet.
Typical Operating Circuit appears at end of data sheet.
Selector Guide appears at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
MAX6381–MAX6390
General Description
