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参数资料
| 型号： | MAX6343MUT+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/8页 |
| 文件大小： | 0K |
| 描述： | IC RESET MPU W/COMP SOT23-6 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 简单复位/加电复位 |
| 监视电压数目： | 1 |
| 输出： | 开路漏极或开路集电极 |
| 复位： | 低有效 |
| 复位超时： | 最小为 100 ms |
| 电压 - 阀值： | 4.38V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 |
| 供应商设备封装： | SOT-6 |
| 包装： | 带卷 (TR) |
6-Pin μP Reset Circuit with
Power-Fail Comparator
V+
V CC
BUFFERED RESET TO
OTHER SYSTEM
COMPONENTS
R1
V CC
RESET
(RESET)
TO μ P
R2
PFI
MAX6342 MR
MAX6343
MAX6344
PFO
V CC
MAX6342
MAX6345
4.7k ?
V CC
μ P
GND
( ) ARE FOR MAX6344 ONLY.
Figure 7. Monitoring Two Supplies
GND
RESET
RESET
GND
V CC
Figure 9. Interfacing to μPs with Bidirectional Reset I/O
R1
V CC
MR
MAX6342
MAX6343 PFO
PFI MAX6344
100k ?
100k ?
Monitoring a Negative Voltage
Connect the circuit as shown in Figure 8 to use the
power-fail comparator to monitor a negative supply rail.
PFO stays low when V- is good. When V- rises to cause
PFI to be above +1.25V, PFO goes high. By adding the
resistors and transistor as shown, a high PFO triggers
V-
R2
GND
RESET
(RESET)
reset. As long as PFO remains high, the MAX6342/
MAX6343/MAX6344 will keep reset asserted. Note that
the accuracy of this circuit depends on the PFI thresh-
V CC - 1.25V = 1.25V - V TRIP
R1 R2
old tolerance, the V CC line voltage, and the resistors.
Also, ensure that the voltage at PFI remains above
( ) ARE FOR MAX6344 ONLY.
Figure 8. Monitoring a Negative Voltage
V TRIP < 0
GND.
Interfacing to μPs with
Bidirectional Reset Pins
Note that this method does not work with the open-drain
output of the MAX6343. The resistor value used is not
critical, but it must be large enough not to load the reset
SOT Top Marks
output when V CC is above the reset threshold. For most
applications, 100k ? is adequate.
Monitoring Two Supplies
Monitor another voltage by connecting a resistor-divider
to PFI as shown in Figure 7. The threshold voltage will
then be given by:
V TH(PFI) = 1.25[(R1 + R2) / R2]
where V TH(PFI) is the threshold at which the monitored
voltage will trip PFO .
A good rule of thumb for selecting the resistors is to
choose R2 between 250k ? and 500k ? and solve for R1.
Connect PFO to MR in applications that require reset to
assert when the second voltage falls below its threshold.
PART
MAX6342LUT-T
MAX6342MUT-T
MAX6342TUT-T
MAX6342SUT-T
MAX6342RUT-T
MAX6342ZUT-T
MAX6343LUT-T
MAX6343MUT-T
MAX6343TUT-T
MAX6343SUT-T
MAX6343RUT-T
MAX6343ZUT-T
SOT TOP
MARK
AACP
AACQ
AACR
AACS
AACT
AACU
AACV
AACW
AACX
AACY
AACZ
AADA
PART
MAX6344LUT-T
MAX6344MUT-T
MAX6344TUT-T
MAX6344SUT-T
MAX6344RUT-T
MAX6344ZUT-T
MAX6345LUT-T
MAX6345MUT-T
MAX6345TUT-T
MAX6345SUT-T
MAX6345RUT-T
MAX6345ZUT-T
SOT TOP
MARK
AADQ
AADR
AADS
AADT
AADU
AADV
AADW
AADX
AADY
AADZ
AAEA
AAEB
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6343RUT | 制造商:Maxim Integrated Products 功能描述:- Cut Tape Product |
| MAX6343RUT+ | 制造商:Maxim from Components Direct 功能描述:MAXIM MAX6343RUT+ PROCESSOR SUPERVISORS - Tape and Reel 制造商:Maxim 功能描述:Maxim MAX6343RUT+ Processor Supervisors |
| MAX6343RUT+T | 功能描述:监控电路 6-Pin 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 |
| MAX6343RUT-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 |
| MAX6343SUT | 制造商:Maxim Integrated Products 功能描述:- Cut Tape Product |
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