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參數(shù)資料
| 型號(hào)： | MAX6855UK42D5+T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Nanopower µP Supervisory Circuits with Manual Reset and Watchdog Timer |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| 封裝： | LEAD FREE, MO-178AA, SOT-23, 5 PIN |
| 文件頁數(shù)： | 5/17頁 |
| 文件大?。?/td> | 489K |
| 代理商： | MAX6855UK42D5+T |
input at different points in the program, rather than
pulsing the watchdog input high-low-high or low-high-
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.
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.
MAX6854/MAX6855/MAX6856/MAX6858/MAX6860–MAX6869
Nanopower P Supervisory Circuits with
Manual Reset and Watchdog Timer
______________________________________________________________________________________
13
START
SET WDI
HIGH
PROGRAM
CODE
SUBROUTINE OR
PROGRAM LOOP
SET WDI LOW
RETURN
VCC THRESHOLD FALLING
SUFFIX
MIN
TYP
MAX
UNITS
46
4.509
4.625
4.741
45
4.388
4.500
4.613
44
4.266
4.375
4.484
43
4.193
4.300
4.408
42
4.095
4.200
4.305
41
3.998
4.100
4.203
40
3.900
4.000
4.100
39
3.802
3.900
3.998
38
3.705
3.800
3.895
37
3.608
3.700
3.793
36
3.510
3.600
3.690
35
3.413
3.500
3.588
34
3.315
3.400
3.485
33
3.218
3.300
3.383
32
3.120
3.200
3.280
31
2.998
3.075
3.152
30
2.925
3.000
3.075
29
2.852
2.925
2.998
28
2.730
2.800
2.870
27
2.633
2.700
2.768
26
2.559
2.625
2.691
25
2.438
2.500
2.563
24
2.340
2.400
2.460
23
2.255
2.313
2.371
225
2.180
2.235
2.290
22
2.133
2.188
2.243
21
2.048
2.100
2.153
20
1.950
2.000
2.050
19
1.853
1.900
1.948
18
1.755
1.800
1.845
17
1.623
1.665
1.707
16
1.536
1.575
1.614
V
Figure 6. Watchdog Flow Diagram
Table 2. Threshold Suffix Guide
WATCHDOG TIMEOUT PERIOD
SUFFIX
MIN
TYP
MAX
UNITS
S
1.5
3.3
7.75
L95
209
487
s
Table 3. Watchdog Timeout
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6855UK42D6+T | 功能描述:監(jiān)控電路 Single nPower Supervisor RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6855UK42D6-T | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6855UK43D1+T | 功能描述:監(jiān)控電路 Single nPower Supervisor RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6855UK43D1-T | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6855UK43D2+T | 功能描述:監(jiān)控電路 Single nPower Supervisor RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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