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| 型号： | MAX6835HXSD3+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/11页 |
| 文件大小： | 0K |
| 描述： | IC MPU SUPERVISOR SC70-4 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 类型： | 简单复位/加电复位 |
| 监视电压数目： | 1 |
| 输出： | 推挽式，图腾柱 |
| 复位： | 低有效 |
| 复位超时： | 最小为 140 ms |
| 电压 - 阀值： | 1.313V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-82A，SOT-343 |
| 供应商设备封装： | SC-70-4 |
| 包装： | 标准包装 |
| 其它名称： | MAX6835HXSD3+TDKR |
MAX6832–MAX6840
Ultra-Low-Voltage SC70 Voltage Detectors
and μP Reset Circuits
Functional Diagrams
MR (MAX6835/MAX6836/MAX6837 ONLY)
V CC
MR
V CC
PULLUP
MANUAL
RESET
DETECT
RESET
TIMEOUT
PERIOD
RESET
OUTPUT
RESET-IN
RESET/
RESET
RESET
TIMEOUT
PERIOD
MAX6838/
RESET
OUTPUT
RESET/
RESET
MAX6839/
MAX6832–
V REF = 444mV
MAX6840
V REF = 444mV
MAX6837
GND
GND
Detailed Description
Reset Output
A microprocessor’s (μP’s) reset input starts the μP in a
known state. The MAX6832–MAX6840 assert a reset to
prevent code-execution errors during power-up, power-
down, or brownout conditions. They also assert a reset
signal whenever the V CC supply voltage falls below a
preset threshold (MAX6832–MAX6837) or RESET-IN
falls below the adjustable threshold (MAX6838/
MAX6839/MAX6840), keeping reset asserted for a fixed
timeout delay (Table 2) after V CC or RESET-IN has risen
above the reset threshold. The MAX6832/MAX6835/
MAX6838 use a push-pull active-low output, the
MAX6833/MAX6836/MAX6839 have a push-pull active-
MR is driven from long cables or if the device is used in
a noisy environment, connecting a 0.1μF capacitor from
MR to ground provides additional noise immunity.
RESET-IN Information
The MAX6838/MAX6839/MAX6840 feature a RESET-IN
input for monitoring supply voltages down to 0.44V. An
external resistive-divider network can be used to set
voltage monitoring thresholds as shown in Figure 1. As
the monitored voltage falls, the voltage at RESET-IN
decreases and asserts a reset when it falls below the
RESET-IN threshold (V RSTIN ). The low-leakage current
high output, and the MAX6834/MAX6837/MAX6840
have an open-drain active-low output stage. Connect a
pullup resistor on the MAX6834/MAX6837/MAX6840’s
RESET output to any supply between 0 and 6V.
Manual Reset Input
Many μP-based systems require manual reset capabili-
V MONITORED
R1
RESET-IN
MAX6838/
MAX6839/
MAX6840
RESET
(RESET)
V CC
ty, allowing the operator, a test technician, or external
logic circuitry to initiate a reset. Reset remains asserted
while MR is low, and for a fixed timeout delay after MR
returns high. This input has an internal 20k ? pullup
resistor, so it can be left open if it is not used. MR can
be driven with CMOS logic level, or with open-drain/col-
lector outputs. To create a manual reset function, con-
nect a normally open momentary switch from MR to
R2
GND
R1 = R2 [(V MONITORED /V REF ) -1]
WHERE V MONITORED IS THE DESIRED TRIP LEVEL,
V REF = 444mV
( ) ARE FOR MAX6839
ground; external debounce circuitry is not required. If
6
Figure 1. Setting the Adjustable Threshold Externally
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6835HXSD4 | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX6835HXSD4+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 1.313V 16UA 4PIN SC-70 - Rail/Tube |
| MAX6835HXSD4+T | 功能描述:监控电路 Single 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 |
| MAX6835HXSD4-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 |
| MAX6835IXSD0 | 制造商:Maxim Integrated Products 功能描述:- Cut Tape Product |
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