19-1839; Rev 2; 9/04
SC70, Single/Dual Low-Voltage,
Low-Power µP Reset Circuits
General Description
Features
♦ Factory-Set Reset Threshold Voltages Ranging
from +1.58V to +4.63V in Approximately 100mV
Increments
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 V
falls below the factory-set reset
CC
♦ ±2.5% Reset Threshold Accuracy Over
thresholds, the reset output asserts and remains assert-
ed for a minimum reset timeout period after V rises
Temperature (-40°C to +125°C)
CC
above the reset threshold. Reset thresholds are available
from +1.58V to +4.63V, in approximately 100mV incre-
ments. Seven minimum reset timeout delays ranging
from 1ms to 1200ms are available.
♦ 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
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
♦ Reset Output State Guaranteed Valid
Down to V
= 1V
CC
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
♦ Manual Reset Input (MAX6384/MAX6385/MAX6386)
♦ Auxiliary RESET IN
(MAX6387/MAX6388/MAX6389)
MAX6390 offers a manual reset input with a longer V
CC
reset timeout period (1120ms or 1200ms) and a shorter
manual reset timeout (140ms or 150ms).
♦ V
Reset Timeout (1120ms or 1200ms)/Manual
CC
Reset Timeout (140ms or 150ms) (MAX6390)
The MAX6381/MAX6382/MAX6383 are available in 3-pin
SC70 packages and the MAX6384–MAX6390 are avail-
able in 4-pin SC70 packages.
♦ Negative-Going V Transient Immunity
CC
♦ Low Power Consumption of 6µA at +3.6V
and 3µA at +1.8V
________________________Applications
♦ Pin Compatible with
MAX809/MAX810/MAX803/MAX6326/MAX6327/
MAX6328/MAX6346/MAX6347/MAX6348,
and MAX6711/MAX6712/MAX6713
Computers
Controllers
Intelligent Instruments
Critical µP and µC Power Monitoring
Portable/Battery-Powered Equipment
Dual Voltage Systems
♦ Tiny 3-Pin SC70 and 4-Pin SC70 Packages
Ordering Information
PART
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
PIN-PACKAGE
MAX6381XR_ _D_-T
MAX6382XR_ _D_-T
MAX6383XR_ _D_-T
3 SC70-3
3 SC70-3
Pin Configurations
3 SC70-3
TOP VIEW
Note: Insert reset threshold suffix (see Reset Threshold table)
after "XR" or "XS". 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.
GND
1
2
MAX6381
MAX6382
MAX6383
3
V
CC
RESET
(RESET)
*MAX6390 is available with D4 or D7 timing only.
SC70
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.
( ) IS FOR MAX6382
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.