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| 型号： | MAX6391KA23+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/9页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISOR MPU DL SOT23-8 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 多压监控器 |
| 监视电压数目： | 2 |
| 输出： | 开路漏极或开路集电极 |
| 复位： | 低有效 |
| 复位超时： | 140 ms/可调最小值 |
| 电压 - 阀值： | 2.32V，可调 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-8 |
| 供应商设备封装： | SOT-23-8 |
| 包装： | 带卷 (TR) |
Dual-Voltage μP Supervisory Circuits
with Sequenced Reset Outputs
Pin Description
MAX6391
PIN
MAX6392
NAME
FUNCTION
Input Voltage for RESET2 Monitor. High-impedance input for internal reset
1
1
RESET IN2
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
RESET2 Delay Set Capacitor. Connect to V CC for a fixed 140ms (min) timeout period
3
3
CSRT
or to an external capacitor for a user-adjustable timeout period after V CC exceeds its
minimum threshold.
4
4
GND
Ground
Secondary Reset Output, Open-Drain, Active-Low. RESET2 changes from high to low
5
5
RESET2
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.
Primary Reset Output, Open-Drain (MAX6391) or Push-Pull (MAX6392), Active-Low.
7
7
RESET1
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.
Manual Reset, Active-Low, Internal 47k ? Pullup to V CC . Pull LOW to force a reset.
—
8
MR
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 ).
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6391KA26 | 制造商:Maxim Integrated Products 功能描述:DUAL-VOLTAGE RESET CIRCUITS WITH SE - Rail/Tube |
| MAX6391KA26+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 2.63V/0.625V 15UA 8PIN SOT-23 - Rail/Tube |
| MAX6391KA26+T | 功能描述:监控电路 Dual uPower Reset Circuit RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX6391KA26-T | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX6391KA29 | 制造商:Maxim Integrated Products 功能描述:DUAL-VOLTAGE RESET CIRCUITS WITH SE - Cut Tape Product |
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