19-1839; Rev 4; 4/07
SC70/µDFN, 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
♦ ±±.5ꢀ Reset Threshold Accꢁracy ꢂOer
thresholds, the reset output asserts and remains assert-
ed for a minimum reset timeout period after V rises
Temperatꢁre (-40°C to +1±5°C)
CC
♦ SeOen Reset Timeoꢁt Periods AOailable: 1ms,
±0ms, 140ms, ±80ms, 560ms, 11±0ms,
1±00ms (min)
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.
♦ 3 Reset ꢂꢁtpꢁt ꢂptions
ActiOe-Low Pꢁsh-Pꢁll
ActiOe-High Pꢁsh-Pꢁll
ActiOe-Low ꢂpen-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 ꢂꢁtpꢁt State Gꢁaranteed Valid
Down to V
= 1V
CC
MAX6384/MAX6385/MAX6386 also feature
a
♦ Manꢁal Reset Inpꢁt (MAX6384/MAX6385/MAX6386)
debounced manual reset input (with internal pullup
resistor). The MAX6387/MAX6388/MAX6389 have an
auxiliary input for monitoring a second voltage. The
♦ Aꢁxiliary RESET IN
(MAX6387/MAX6388/MAX6389)
MAX6390 offers a manual reset input with a longer V
♦ V
Reset Timeoꢁt (11±0ms or 1±00ms)/Manꢁal
CC
Reset Timeoꢁt (140ms or 150ms) (MAX6390)
CC
reset timeout period (1120ms or 1200ms) and a shorter
manual reset timeout (140ms or 150ms).
♦ NegatiOe-Going V Transient Immꢁnity
CC
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.
♦ Low Power Consꢁmption of 6µA at +3.6V
and 3µA at +1.8V
♦ Pin Compatible with
MAX809/MAX810/MAX803/MAX63±6/MAX63±7/
MAX63±8/MAX6346/MAX6347/MAX6348,
and MAX6711/MAX671±/MAX6713
Applications
Computers
Critical µP and µC
Power Monitoring
♦ Tiny 3-Pin/4-Pin SC70 and 6-Pin µDFN Packages
Controllers
Portable/Battery-
Powered Equipment
Ordering Information
Intelligent Instruments
PIN-
PKG
Dual Voltage Systems
PART
TEMP RANGE
PACKAGE CꢂDE
Pin Configurations
MAX6381LT_ _D_+T -40°C to +125°C 6 µDFN-6
MAX6381XR_ _D_+T -40°C to +125°C 3 SC70-3
MAX638±LT_ _D_+T -40°C to +125°C 6 µDFN-6
MAX6382XR_ _D_+T -40°C to +125°C 3 SC70-3
L611-1
X3-2
TOP VIEW
GND
6
N.C.
5
V
CC
4
L611-1
X3-2
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.
GND
1
2
MAX6381
MAX6382
MAX6383
MAX6381
MAX6382
MAX6383
3
V
CC
RESET
(RESET)
1
2
3
SC70
RESET
(RESET)
N.C.
N.C
+Denotes a lead-free package.
( ) IS FOR MAX6382
µDFN
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.
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
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.