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參數(shù)資料
| 型號(hào)： | MAX6374KA-T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類(lèi)： | 電源管理 |
| 英文描述： | Pin-Selectable Watchdog Timers |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | SOT-23, 8 PIN |
| 文件頁(yè)數(shù)： | 5/8頁(yè) |
| 文件大?。?/td> | 114K |
| 代理商： | MAX6374KA-T |
M
Pin-Selectable Watchdog Timers
_______________________________________________________________________________________
5
PIN
NAME
FUNCTION
1
WDI
Watchdog Input. If WDI remains either high or low for the duration of the watchdog timeout period (t
WD
),
WDO
triggers a pulse. The internal watchdog timer clears whenever a
WDO
is asserted or whenever WDI sees a
rising or falling edge.
2
GND
Ground
3
N.C.
Not Connected. Do not make any connection to this pin.
4
SET0
S et Z er o. Log c i np ut for sel ecti ng star up d el ay and w atchd og ti m eout p er od s. S ee Tab e 1 for ti m ng d etai s.
5
SET1
S et One. Log c i np ut for sel ecti ng star up d el ay and w atchd og ti m eout p er od s. S ee Tab e 1 for ti m ng d etai s.
6
SET2
S et Tw o. Log c i np ut for sel ecti ng star up d el ay and w atchd og ti m eout p er od s. S ee Tab e 1 for ti m ng d etai s.
7
WDO
Watchdog Output. Pulses low for the watchdog output pulse width, t
WDO
, when the internal watchdog times
out. The MAX6369/MAX6371/MAX6373 have open-drain outputs and require a pull-up resistor. The
MAX6370/MAX6372/MAX6374 outputs are push-pull.
8
V
CC
Supply Voltage (+2.5V to +5.5V)
Table 1. Minimum Timeout Settings
Pin Description
Detailed Description
The MAX6369
–
MAX6374 are flexible watchdog circuits
for monitoring μP activity. During normal operation, the
internal timer is cleared each time the μP toggles the
WDI with a valid logic transition (low to high or high to
low) within the selected timeout period (t
WD
). The
WDO
remains high as long as the input is strobed within the
selected timeout period. If the input is not strobed
before the timeout period expires, the watchdog output
is asserted low for the watchdog output pulse width
(t
WDO
). The device type and the state of the three logic
control pins (SET0, SET1, and SET2) determine watch-
dog timing characteristics. The three basic timing varia-
tions for the watchdog startup delay and the normal
watchdog timeout period are summarized below (see
Table 1 for the timeout characteristics for all devices in
the family):
Watchdog Startup Delay:
Provides an initial delay before the watchdog timer is
started.
Allows time for the μP system to power up and initial-
ize before assuming responsibility for normal watch-
dog timer updates.
Includes several fixed or pin-selectable startup delay
options from 200μs to 60s, and an option to wait for
the first watchdog input transition before starting the
watchdog timer.
LOGIC INPUTS
MAX6369/MAX6370
MAX6371/MAX6372
MAX6373/MAX6374
SET2
SET1
SET0
t
DELAY
, t
WD
t
DELAY
= 60s, t
WD
t
DELAY
t
WD
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
1ms
10ms
30ms
Disabled
100ms
1s
10s
60s
1ms
3ms
10ms
Disabled
100ms
300ms
3s
60s
3ms
3s
60s
3ms
3s
1s
Disabled
200μs
First Edge
First Edge
60s
Disabled
30μs
1s
10s
10s
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6375UR | 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:3-Pin, Ultra-Low-Power SC70/SOT23 Voltage Detectors |
| MAX6375UR__-T | 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:3-Pin, Ultra-Low-Power SC70/SOT23 Voltage Detectors |
| MAX6375UR22 | 制造商:Maxim Integrated Products 功能描述:3-PIN ULTRA-LOW-POWER SC70 VOLTAG - Cut Tape Product |
| MAX6375UR22+ | 制造商:Maxim Integrated Products 功能描述:VOLT SUPERVISOR DETECT 2.2V 3PIN SOT-23 - Rail/Tube |
| MAX6375UR22+T | 功能描述:電壓監(jiān)測(cè)器/監(jiān)控器 3-Pin ULow-Power Voltage Detector RoHS:否 制造商:Texas Instruments 監(jiān)測(cè)電壓數(shù):2 監(jiān)測(cè)電壓:Adjustable 輸出類(lèi)型:Open Drain 欠電壓閾值: 過(guò)電壓閾值: 準(zhǔn)確性:1 % 工作電源電壓:1.5 V to 6.5 V 工作電源電流:1.8 uA 最大工作溫度:+ 125 C 封裝 / 箱體:SON-6 安裝風(fēng)格:SMD/SMT |
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