General Description
The MAX6381–MAX6390 microprocessor (μP) supervi-
sory 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.
Applications
● Computers
● Controllers
● Intelligent Instruments
● Critical μP and μC
Power Monitoring
● Portable/Battery-
Powered Equipment
● Dual Voltage Systems
Features
● Factory-Set Reset Threshold Voltages Ranging from
+1.58V to +4.63V in Approximately 100mV Increments
● ±2.5% Reset Threshold Accuracy Over
Temperature (-40°C to +125°C)
● Seven Reset Timeout Periods Available: 1ms, 20ms,
140ms, 280ms, 560ms, 1120ms, 1200ms (min)
● 3 Reset Output Options
• Active-Low Push-Pull
• Active-High Push-Pull
• Active-Low Open-Drain
●Reset Output State Guaranteed Valid Down to VCC = 1V
● Manual Reset Input (MAX6384/MAX6385/MAX6386)
● Auxiliary RESET IN (MAX6387/MAX6388/MAX6389)
● VCC Reset Timeout (1120ms or 1200ms)/Manual
Reset Timeout (140ms or 150ms) (MAX6390)
● Negative-Going VCC Transient Immunity
●Low Power Consumption of 6μA at +3.6V and 3μA at +1.8V
● Pin Compatible with MAX809/MAX810/MAX803/
MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/
MAX6348, and MAX6711/MAX6712/MAX6713
● Tiny 3-Pin/4-Pin SC70 and 6-Pin μDFN Packages
● AEC-Q100 Qualified, Refer to Ordering Information
for the Specific /V Trim Version
19-1839; Rev 6; 3/18
Pin Configurations continued at end of data sheet.
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.
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.
PART TEMP RANGE PIN-
PACKAGE
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
MAX6381XR26D3/V+T -40°C to +125°C 3 SC70
MAX6381XR46D2/V+T -40°C to +125°C 3 SC70
MAX6381–MAX6390 SC70/μDFN, Single/Dual Low-Voltage,
Low-Power μP Reset Circuits
Pin Congurations
Ordering Information
RESET
(RESET)
1
3 VCC
GND
MAX6381
MAX6382
MAX6383
TOP VIEW
2
SC70
( ) IS FOR MAX6382
1 2 3
6 5 4
GND VCC
N.C.
N.CN.C.
MAX6381
MAX6382
MAX6383
µDFN
RESET
(RESET)
Click here for production status of specic part numbers.