Datasheet
MAX6381–MAX6390
SC70/µDFN, Single/Dual Low-Voltage,
Low-Power µP Reset Circuits
5
Pin Description
PIN
3-PIN SC70 4-PIN SC70
µDFN
MAX6381/
MAX6383
MAX6382
MAX6384/
MAX6386/
MAX6390
MAX6385
MAX6387/
MAX689
MAX6388
NAME FUNCTION
1
(MAX6382/
MAX6385/
MAX6388)
2 — 2 — 2 RESET
Active-High Push-Pull Reset Output.
RESET changes from low to high when
any monitored voltage (V
CC
or
V
RESETIN
) drops below the reset
threshold or MR is pulled low. RESET
remains high for the reset timeout
period after monitored voltages exceed
the reset thresholds or MR is released.
1
(MAX6381/
MAX6383/
MAX6384/
MAX6386/
MAX6387/
MAX6390)
2— 2—2—RESET
Acti ve- Low Op en- D r ai n/P ush- P ul l Reset
Outp ut. RE S E T chang es fr om hi g h to l ow
w hen any m oni tor ed vol tag e ( V
C C
or
V
RE S E TIN
) d r op s b el ow the r eset thr eshol d
or M R i s p ul l ed l ow . RE S E T r em ai ns l ow for
the r eset ti m eout p er i od after the m oni tor ed
vol tag es exceed the r eset thr eshol d s or M R
i s r el eased . O p en- d r ai n r eq ui r es an
exter nal p ul l up r esi stor .
2, 3, 5
(MAX6381/
MAX6382/
MAX6383)
2, 5
(MAX6384–
MAX6390)
— — — — — — N.C.
No Connection. Not Internally
connected.
3
(MAX6384/
MAX6385/
MAX6386/
MAX6390)
—— 3 3 ——MR
Active-Low Manual Reset Input. Drive
low to force a reset. Reset remains
active as long as MR is low and for the
reset timeout period after MR is
released. Leave unconnected or
connect to V
CC
if unused. MR has an
internal 63kΩ (1.56kΩ for MAX6390)
pullup resistor to V
CC
.
3
(MAX6387/
MAX6388/
MAX6389)
—— — — 3 3
RESET
IN
Auxi l i ar y Reset Inp ut. H i g h- i m p ed ance
i np ut to the auxi l i ar y r eset com p ar ator .
C onnect RE S E T IN to the center p oi nt of
an exter nal r esi stor vol tag e- d i vi d er
netw or k to set the r eset thr eshol d vol tag e.
Reset asser ts w hen ei ther V
C C
or RE S E T
IN fal l s b el ow i ts thr eshol d vol tag e.
4
(MAX6381
–
MAX6390)
33 4444V
CC
Supply Voltage for the device and input
for fixed V
CC
reset threshold monitor.
6
(MAX6381–
MAX6390)
1 1 1 1 1 1 GND Ground