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| 型号： | MAX6419UK35+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/12页 |
| 文件大小： | 0K |
| 描述： | IC RESET MPU LOW PWR SOT23-5 |
| 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： | 推挽式，图腾柱 |
| 复位： | 高有效 |
| 复位超时： | 可调节/可选择 |
| 电压 - 阀值： | 3.5V，可调 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-23-5 |
| 包装： | 带卷 (TR) |
MAX6412–MAX6420
Low-Power, Single/Dual-Voltage μP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
Pin Description
PIN
MAX6412/
MAX6413/
MAX6414
MAX6415/
MAX6416/
MAX6417
MAX6418/
MAX6419/
MAX6420
NAME
FUNCTION
RESET changes from high to low whenever V CC or RESET IN drops below
RESET
the selected reset threshold voltage (V TH or V RESET IN , respectively) or
manual reset is pulled low. RESET remains low for the reset timeout period
1
1
1
RESET
after all reset conditions are deasserted and then goes high.
RESET changes from low to high whenever the V CC or RESET IN drops
below the selected reset threshold voltage (V TH or V RESET IN ) or manual
reset is pulled low. RESET remains high for the reset timeout period after all
reset conditions are deasserted and then goes low.
2
2
2
GND
Ground
Reset Input. High-impedance input to the adjustable reset comparator.
—
3
3
RESET
IN
Connect RESET IN to the center point of an external resistor-divider
network to set the threshold of the externally monitored voltage. See Reset
Threshold section.
3
—
—
MR
Manual Reset Input. Pull this pin low to manually reset the device. Reset
remains asserted for the reset timeout period after MR is released.
Set Reset Timeout Input. Connect a capacitor between SRT and ground to
4
4
4
SRT
set the timeout period. Determine the period as follows:
t RP = (2.71 x 10 6 ) ? C SRT + 275μs with t RP in seconds and C SRT in Farads.
5
5
5
V CC
Supply Voltage and Input for Fixed-Threshold V CC Monitor
Detailed Description
The MAX6412 –MAX6420 low-power microprocessor
(μP) supervisory circuits provide maximum adjustability
for supply-voltage monitoring and reset functionality. In
addition, the MAX6412–MAX6420 reset timeout period
is adjustable using an external capacitor.
The MAX6412/MAX6413/MAX6414 have factory-
trimmed reset threshold voltages in approximately
100mV increments from 1.575V to 5.0V with a manual
reset input. The MAX6415/MAX6416/MAX6417 contain
a reset threshold that can be adjusted to any voltage
above 1.26V using external resistors. The MAX6418/
MAX6419/MAX6420 offer both a factory-trimmed reset
threshold and an adjustable reset threshold input for
dual-voltage monitoring.
A reset signal is asserted when V CC and/or RESET IN
falls below the preset values or when MR is asserted.
The reset remains asserted for an externally pro-
grammed interval after V CC and/or RESET IN has risen
above the reset threshold or MR is deasserted.
Reset Output
The reset output is typically connected to the reset
input of a μP. A μP’s reset input starts or restarts the μP
Maxim Integrated
in a known state. The MAX6412–MAX6420 μP supervi-
sory circuits provide the reset logic to prevent code-
execution errors during power-up, power-down, and
brownout conditions (see Typical Operating Circuit).
For the MAX6413, MAX6416, and MAX6419, RESET
changes from low to high whenever V CC or RESET IN
drops below the reset threshold voltages. Once RESET
IN and V CC exceed their respective reset threshold volt-
age(s), RESET remains high for the reset timeout period,
then goes low.
On power-up, once V CC reaches 1V, RESET is guaran-
teed to be a logic high. For applications requiring valid
reset logic when V CC is less than 1V, see the section
Ensuring a Valid RESET/ RESET Output Down to V CC = 0V.
The active-low RESET output of the remaining supervi-
sors is the inverse of the MAX6413, MAX6416, and
MAX6419 active-high RESET output and is guaranteed
valid for V CC ≥ 1V.
Reset Threshold
The MAX6415–MAX6420 monitor the voltage on RESET
IN with an external resistor voltage-divider (Figure 1).
5
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6419UK36 | 制造商:Maxim Integrated Products 功能描述:LOW-PWR SNGL/DUAL-VLTAGE MICROPROC - Rail/Tube |
| MAX6419UK36+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 3.6V/ADJV 2.7UA 5PIN SOT-23 - Rail/Tube |
| MAX6419UK36+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 |
| MAX6419UK36-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 |
| MAX6419UK37 | 制造商:Maxim Integrated Products 功能描述:LOW-PWR SNGL/DUAL-VLTAGE MICROPROC - Rail/Tube |
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