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參數(shù)資料
| 型號： | MAX6444US__L-T |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | レP Reset Circuits with Long Manual Reset Setup Period |
| 中文描述： | レP復(fù)位電路，帶有長手動復(fù)位安裝周期 |
| 文件頁數(shù)： | 5/13頁 |
| 文件大?。?/td> | 261K |
| 代理商： | MAX6444US__L-T |
M
μP Reset Circuits with Long Manual Reset
Setup Period
_______________________________________________________________________________________
5
Detailed Description
Reset Output
The reset output is typically connected to the reset
input of a microprocessor (μP). A μP
’
s reset input starts
or restarts the μP in a known state. The MAX6443
–
MAX6452 μP supervisory circuits provide the reset
logic to prevent code-execution errors during power-
up, power-down and brownout conditions (see the
Typical Operating Circuit
).
RESET
changes from high to low whenever the moni-
tored voltages (RSTIN or V
CC
) drop below the reset
threshold voltages. Once V
RSTIN
and V
CC
exceed their
respective reset threshold voltages,
RESET
remains low
for the reset timeout period and then goes high.
RESET
is one-shot pulsed whenever selected manual reset
inputs are asserted.
RESET
stays asserted for the nor-
mal reset timeout period (140ms min).
RESET
is guaranteed to be in the proper output logic
state for V
CC
inputs
≥
1V. For applications requiring valid
reset logic when V
CC
is less than 1V, see the
Ensuring a
Valid
RESET
Output Down to V
CC
= 0V
section.
Pin Description
PIN
MAX6443
MAX6444
MAX6445
MAX6446
MAX6447
MAX6448
MAX6449
MAX6450
MAX6451
MAX6452
NAME
FUNCTION
1
2
2
2
2
GND
Ground
2
1
1
1
1
RESET
Acti ve- Low P ush- P ul or Op en- D ai n Outp ut.
RES ET
chang es fr om hi g h to l ow w hen V
C C
or RS TIN d op s b el ow
i s sel ected r eset thr eshol d and r em ai ns l ow for the 210m s
r eset ti m eout p er od after al m oni or ed p ow er sup p y i np uts
exceed thei sel ected r eset thr eshol d s.
RES ET
i s one- shot
p ul sed l ow for the r eset ti m eout p er od ( 140m s m n) after
sel ected m anual r eset i np uts ar e asser ed l ong er than the
sp eci i ed setup p er od For the op en- d ai n outp ut, use a
m ni m um 20k
p ul up r esi stor to V
C C
.
3
—
3
—
3
Manual Reset Input, Active Low. Internal 50k
pullup to
V
CC.
Pull
MR1
low for the typical input pulse width
(6.72s) to one-shot pulse
RESET
for the reset timeout
period.
—
3
—
3
—
MR1
Manual Reset Input, Active Low. Pull both
MR1
and
MR2
low for the typical input pulse width (6.72s) to one-
shot pulse
RESET
for the reset timeout period.
4
4
4
4
4
V
CC
V
CC
Voltage Input. Power supply and input for the
primary microprocessor voltage reset monitor.
—
5
—
6
—
MR2
Manual Reset Input, Active Low. Internal 50k
pullup to
V
CC
. Pull both
MR1
and
MR2
low for the typical input
pulse width (6.72s) to one-shot pulse
RESET
for the
reset timeout period.
—
—
5
—
6
MR2
Manual Reset Input. Pull the MR2 high to immediately
one-shot pulse
RESET
for the reset timeout period.
Reset Input. High-impedance input to the adjustable
reset comparator. Connect RSTIN to the center point of
an external resistor-divider to set the threshold of the
externally monitored voltage.
—
—
—
5
5
RSTIN
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6445UK16L | 制造商:Maxim Integrated Products 功能描述:+P RESET CIRCUITS WITH LONG MANUAL - Rail/Tube |
| MAX6445UK16L+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 1.58V 7UA 5PIN SOT-23 - Rail/Tube |
| MAX6445UK16L+T | 功能描述:監(jiān)控電路 Single uPower Reset Circuit RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6445UK16L-T | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6445UK17L | 制造商:Maxim Integrated Products 功能描述:+P RESET CIRCUITS WITH LONG MANUAL - Rail/Tube |
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