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| 型号： | MAX6861UK45+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 13/17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： | 推挽式，图腾柱 |
| 复位： | 低有效 |
| 复位超时： | 可调节/可选择 |
| 电压 - 阀值： | 4.5V |
| 工作温度： | -40°C ~ 85°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) |
Nanopower μP Supervisory Circuits with
Manual Reset and Watchdog Timer
input at different points in the program, rather than
pulsing the watchdog input high-low-high or low-high-
Table 2. Threshold Suffix Guide
low. This technique avoids a stuck loop, in which the
watchdog timer would continue to be reset inside the
loop, keeping the watchdog from timing out.
SUFFIX
46
V CC THRESHOLD FALLING
MIN TYP MAX
4.509 4.625 4.741
UNITS
Figure 6 shows an example of a flow diagram where
the I/O driving the watchdog input is set high at the
beginning of the program, set low at the beginning of
every subroutine or loop, then set high again when the
program returns to the beginning. If the program
should hang in any subroutine, the problem would
quickly be corrected, since the I/O is continually set low
and the watchdog timer is allowed to time out, causing
a reset or interrupt to be issued.
START
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
4.388
4.266
4.193
4.095
3.998
3.900
3.802
3.705
3.608
3.510
3.413
3.315
3.218
3.120
2.998
4.500
4.375
4.300
4.200
4.100
4.000
3.900
3.800
3.700
3.600
3.500
3.400
3.300
3.200
3.075
4.613
4.484
4.408
4.305
4.203
4.100
3.998
3.895
3.793
3.690
3.588
3.485
3.383
3.280
3.152
SET WDI
HIGH
PROGRAM
CODE
SUBROUTINE OR
PROGRAM LOOP
SET WDI LOW
RETURN
Figure 6. Watchdog Flow Diagram
30
29
28
27
26
25
24
23
225
22
21
20
19
18
17
16
2.925
2.852
2.730
2.633
2.559
2.438
2.340
2.255
2.180
2.133
2.048
1.950
1.853
1.755
1.623
1.536
3.000
2.925
2.800
2.700
2.625
2.500
2.400
2.313
2.235
2.188
2.100
2.000
1.900
1.800
1.665
1.575
3.075
2.998
2.870
2.768
2.691
2.563
2.460
2.371
2.290
2.243
2.153
2.050
1.948
1.845
1.707
1.614
V
Table 3. Watchdog Timeout
SUFFIX
MIN
WATCHDOG TIMEOUT PERIOD
TYP MAX
UNITS
S
L
1.5
95
3.3
209
7.75
487
s
______________________________________________________________________________________
13
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相关代理商/技术参数 |
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|---|---|
| MAX6861UK46 | 制造商:Maxim Integrated Products 功能描述:NANOPOWER ?P SUPERVISORY CIRCUITS W - Cut Tape Product |
| MAX6861UK46+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 4.625V 7UA 5PIN SOT-23 - Cut Tape Product |
| MAX6861UK46+T | 功能描述:监控电路 Single nPower 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 |
| MAX6861UK46-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 |
| MAX6862UK16+T | 功能描述:监控电路 Single nPower 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 |
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