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参数资料
| 型号： | MAX6814XK+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/6页 |
| 文件大小： | 0K |
| 描述： | IC WATCHDOG TIMER CIRC SC70-5 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 类型： | 监视器电路 |
| 监视电压数目： | 1 |
| 输出： | 推挽式，图腾柱 |
| 复位： | 低有效 |
| 复位超时： | 最小为 1.12 s |
| 电压 - 阀值： | 2.19V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-TSSOP（5 引线），SC-88A，SOT-353 |
| 供应商设备封装： | SC-70-5 |
| 包装： | 标准包装 |
| 其它名称： | MAX6814XK+TDKR |
5-Pin Watchdog Timer Circuit
ABSOLUTE MAXIMUM RATINGS
V CC ........................................................................-0.3V to +6.0V
All Other Pins..............................................-0.3V to (V CC + 0.3V)
Input Current, WDI ..............................................................20mA
Output Current, WDO ..........................................................20mA
Continuous Power Dissipation (T A = +70 ° C)
5-Pin SC70 (derate 3.1mW/ ° C above +70 ° C) ...............247mW
Operating Temperature Range ...........................-40 ° C to +85 ° C
Storage Temperature Range .............................-65 ° C to +150 ° C
Junction Temperature ......................................................+150 ° C
Lead Temperature (soldering, 10s) .................................+300 ° C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V CC = +2.25V to +5.5V, T A = T MIN to T MAX , T A = -40 ° C to +85 ° C, unless otherwise noted. Typical values are at T A = +25 ° C.)
(Note 1)
PARAMETER
Operating Voltage Range
SYMBOL
V CC
CONDITIONS
T A = 0°C to +70°C
MIN
2.25
TYP
MAX
5.5
UNITS
V
Supply Current
Undervoltage Lockout Threshold
Watchdog Pulse Period
I SUPPLY
UVLO
t PP
WDI unconnected
(Note 2)
(Note 3)
V CC = 5.5V
V CC = 2.5V
140
10
4
2.19
200
24
12
280
μA
V
ms
WDO Output Voltage
WDO Output Short-Circuit Current
V OH
V OL
I SOURCE
I SOURCE = 30μA, V CC = 2.3V
I SINK = 1.2mA, V CC = 2.1V
V CC = 3.6V (Note 4)
0.8 ? V CC
0.3
400
V
μA
Watchdog Timeout Period
WDI Pulse Width
t WD
t WDI
V IL = 0.4V, V IH = 0.8 ? V CC
1.12
50
1.60
2.40
s
ns
WDI Input Voltage (Note 5)
V IL
V IH
0.7 ? V CC
0.3 ? V CC
V
WDI Input Current (Note 6)
WDI = V CC , time average
WDI = 0, time average
-20
120
-15
160
μA
Note 1: Overtemperature limits are guaranteed by design, production testing performed at +25°C only.
Note 2: WDO is low when V CC falls below the undervoltage threshold. When V CC rises above the undervoltage threshold, WDO goes
high after the watchdog pulse period.
Note 3: Watchdog pulse period occurs when the watchdog times out or after V CC rises above the undervoltage threshold.
Note 4: The WDO short-circuit current is the maximum pullup current when WDO is driven low.
Note 5: WDI is internally serviced within the watchdog period if WDI is left unconnected.
Note 6: The WDI input current is specified as the average input current when the WDI input is driven high or low. The WDI input is
designed to drive a three-stated output device with a 10μA maximum leakage current and a maximum capacitive load of
200pF. This output device must be able to source and sink at least 200μA when active.
2
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