參數資料
型號： MAX6391KA44
廠商： Maxim Integrated Products, Inc.
英文描述： Dual-Voltage uP Supervisory Circuits with Sequenced Reset Outputs
中文描述： 雙電壓監(jiān)控電路的連續(xù)復位輸出
文件頁數： 5/9頁
文件大?。?/td> 170K
代理商： MAX6391KA44
M
Dual-Voltage μP Supervisory Circuits
with Sequenced Reset Outputs
_______________________________________________________________________________________
5
Pin Description
PIN
MAX6391
MAX6392
NAME
FUNCTION
1
1
RESET IN2
Input Voltage for
RESET2
Monitor. High-impedance input for internal reset
comparator. Connect this pin to an external resistive-divider network to set the reset
threshold voltage.
2
2
V
CC
Supply Voltage and Input Voltage for Primary Supply Monitor
3
3
CSRT
RESET2
Delay Set Capacitor. Connect to V
CC
for a fixed 140ms (min) timeout period
or to an external capacitor for a user-adjustable timeout period after V
CC
exceeds its
minimum threshold.
4
4
GND
Ground
5
5
RESET2
Secondary Reset Output, Open-Drain, Active-Low.
RESET2
changes from high to low
when either V
CC
or RESET IN2 drop below their thresholds.
RESET2
remains low for a
user-adjustable timeout period (see CSRT) or a fixed 140ms (min) after V
CC
and
RESET IN2 meet their minimum thresholds.
6
6
R2
47k
Internal Pullup Resistor for
RESET2
. Connect to external voltage for
RESET2
high pullup.
7
7
RESET1
Primary Reset Output, Open-Drain (MAX6391) or Push-Pull (MAX6392), Active-Low.
RESET1
changes from HIGH to LOW when the V
CC
input drops below the selected
reset threshold.
RESET1
remains LOW for the reset timeout period after V
CC
exceeds
the minimum threshold.
8
—
R1
47k
Internal Pullup Resistor for
RESET1
. Connect to external voltage for
RESET1
high pullup.
—
8
MR
Manual Reset, Active-Low, Internal 47k
Pullup to V
CC
. Pull LOW to force a reset.
RESET1
and
RESET2
remain asserted as long as
MR
is LOW and for the
RESET1
and
RESET2
timeout periods after
MR
goes HIGH. Leave unconnected or connect to V
CC
if unused.
Detailed Description
Each device includes a pair of voltage monitors with
sequenced reset outputs. The first block monitors V
CC
only (
RESET1
output is independent of the RESET IN2
monitor). It asserts a reset signal (LOW) whenever V
CC
is below the preset voltage threshold.
RESET1
remains
asserted for at least 140ms after V
CC
rises above the
reset threshold.
RESET1
timing is internally set in each
device. V
CC
voltage thresholds are available from
1.57V to 4.63V. In all cases V
CC
acts as the master
supply (all resets are asserted when V
CC
goes below
its selected threshold). The V
CC
input also acts as the
device power supply.
The second block monitors both RESET IN2 and V
CC
. It
asserts a reset signal (LOW) whenever RESET IN2 is
below the 625mV threshold or V
CC
is below its reset
threshold.
RESET2
remains asserted for a fixed 140ms
(min) or a user-adjustable time period after RESET IN2
rises above the 625mV reset threshold and
RESET1
is
deasserted. Resets are guaranteed valid for V
CC
down
to 1V.
The timing diagram in Figure 2 shows the reset timing
characteristics of the MAX6391/MAX6392. As shown in
Figure 2,
RESET1
deasserts 140ms (min) (t
RP1
) after
V
CC
exceeds the reset threshold.
RESET2
deasserts
t
RP2
(140ms minimum or a user-adjustable timeout peri-
od) after RESET IN2 exceeds 625mV and
RESET1
is
deasserted. When RESET IN2 drops below 625mV
while V
CC
is above the reset threshold,
RESET2
asserts
within 10μs typ.
RESET1
is unaffected when this hap-
pens. When V
CC
falls below V
TH1
,
RESET2
always
asserts before
RESET1
(t
RD2
< t
RD1
).
相關PDF資料
PDF描述
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相關代理商/技術參數
參數描述
MAX6391KA44+ 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 4.38V/0.625V 15UA 8PIN SOT-23 - Rail/Tube
MAX6391KA44+T 功能描述:監(jiān)控電路 Dual uPower Reset Circuit RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數: 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel
MAX6391KA44-T 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數: 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel
MAX6391KA46 制造商:Maxim Integrated Products 功能描述:DUAL-VOLTAGE RESET CIRCUITS WITH SE - Rail/Tube
MAX6391KA46+ 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 4.63V/0.625V 15UA 8PIN SOT-23 - Rail/Tube
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