参数资料
| 型号： | NCV803SQ308T1G |
| 厂商： | ON Semiconductor |
| 文件页数： | 6/10页 |
| 文件大小： | 0K |
| 描述： | IC MICROPROC RESET MON SC-70-3 |
| 标准包装： | 3,000 |
| 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： | 3.08V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-70，SOT-323 |
| 供应商设备封装： | SC-70-3（SOT323） |
| 包装： | 带卷 (TR) |
MAX803 Series, NCP803 Series
Detail Operation Description
The MAX803, NCP803 series microprocessor reset
supervisory circuits are designed to monitor the power
supplies in digital systems and provide a reset signal to the
processor without any external components. Figure 2 shows
the timing diagram and a typical application below. Initially
consider that input voltage V CC is at a nominal level greater
than the voltage detector upper threshold ( VTH ). And the
RESET (RESET) output voltage (Pin 2) will be in the high
state for MAX803 and NCP803 devices. If there is an input
power interruption and V CC becomes significantly
deficient, it will fall below the lower detector threshold
(V TH ? ). This event causes the RESET output to be in the low
state for the MAX803 and NCP803 devices. After
completion of the power interruption, V CC will rise to its
nominal level and become greater than the V TH . This
sequence activates the internal oscillator circuitry and
digital counter to count. After the count of the timeout
period, the reset output will revert back to the original state.
Input Voltage
Reset Output
MAX803, NCP803
Reset Output
V CC
V TH+
V TH–
V CC
V TH–
0V
V CC
V TH–
MAX810
0V
t RP
Figure 12. Timing Waveforms
http://onsemi.com
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