- 您现在的位置：买卖IC网 > PDF目录13993 > MAX6822MUK+T (Maxim Integrated Products)IC MPU SUPERVISOR SOT23-5 PDF资料下载
参数资料
| 型号： | MAX6822MUK+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/9页 |
| 文件大小： | 0K |
| 描述： | IC MPU SUPERVISOR SOT23-5 |
| 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 140 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： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-23-5 |
| 包装： | 带卷 (TR) |
Low-Voltage SOT23 μP Supervisors with
Manual Reset and Watchdog Timer
V CC
RESET
GENERATOR
MAX6821–
MAX6825
RESET (MAX6822 – MAX6825)
RESET
(MAX6821/MAX6824 / MAX6825)
V CC
1.26V
MR
(MAX6821–MAX6823,
MAX6825)
WDI
(MAX6821–MAX6824)
WATCHDOG
TRANSITION
DETECTOR
WATCHDOG
TIMER
GND
Figure 1. Functional Diagram
Disable the watchdog function by leaving WDI uncon-
nected or by three-stating the driver connected to WDI.
The watchdog input is internally driven low during the
first 7/8 of the watchdog timeout period and high for the
last 1/8 of the watchdog timeout period. When WDI is left
V CC
1V
RESET
V TH
t RP
V TH
1V
t RD
unconnected, this internal driver clears the 1.6s timer
every 1.4s. When WDI is three-stated or unconnected,
the maximum allowable leakage current is 10μA and the
maximum allowable load capacitance is 200pF.
RESET
GND
t RP
t RD
Applications Information
Watchdog Input Current
The MAX6821/MAX6822/MAX6823/MAX6824 WDI inputs
are internally driven through a buffer and series resistor
from the watchdog timer (Figure 1). When WDI is left
unconnected, the watchdog timer is serviced within the
watchdog timeout period by a low-high-low pulse from
the counter chain. For minimum watchdog input current
(minimum overall power consumption), leave WDI low for
the majority of the watchdog timeout period, pulsing it
low-high-low once within the first 7/8 of the watchdog
timeout period to reset the watchdog timer. If WDI is
externally driven high for the majority of the timeout peri-
od, up to 160μA can flow into WDI.
Figure 2. Reset Timing Diagram
Interfacing to μPs with
Bidirectional Reset Pins
Since the RESET output on the MAX6822 is open drain,
it interfaces easily with μPs that have bidirectional reset
pins, such as the Motorola 68HC11. Connecting the μP
supervisor ’ s RESET output directly to the microcon-
troller ’ s RESET pin with a single pullup resistor allows
either device to assert reset (see Figure 4).
Negative-Going V CC Transients
These supervisors are relatively immune to short-dura-
tion, negative-going V CC transients (glitches), which
usually do not require the entire system to shut down.
6
_______________________________________________________________________________________
相关PDF资料 |
PDF描述 |
|---|---|
| LT1766EGN | IC REG BUCK ADJ 1.5A 16SSOP |
| GBM43DCMT-S288 | CONN EDGECARD 86POS .156 EXTEND |
| LT3971IDD-5#PBF | IC REG BUCK 5V 1.2A 10DFN |
| MAX6823MUK+T | IC MPU SUPERVISOR SOT23-5 |
| LT3971IDD-3.3#PBF | IC REG BUCK 3.3V 1.2A 10DFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6822RUK | 制造商:Maxim Integrated Products 功能描述:LOW-VOLTAGE SOT23 MICROPROCESSOR SUPERVISORS - Bulk 制造商:Rochester Electronics LLC 功能描述: |
| MAX6822RUK+ | 制造商:Maxim Integrated Products 功能描述:LOW-VOLTAGE SOT23 MICROPROCESSOR SU - Rail/Tube |
| MAX6822RUK+T | 功能描述:监控电路 Single uPower Supervisor 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 |
| MAX6822RUK-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 |
| MAX6822SUK | 制造商:Maxim Integrated Products 功能描述:LOW-VOLTAGE SOT23 MICROPROCESSOR SUPERVISORS - Bulk |
发布紧急采购，3分钟左右您将得到回复。