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TS823CX5B 数据表(PDF) 4 Page - Taiwan Semiconductor Company, Ltd |
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TS823CX5B 数据表(HTML) 4 Page - Taiwan Semiconductor Company, Ltd |
4 / 6 page TS823/824/825 4-6 2003/12 rev. A Detail Description (continued) Watchdog Input Current The watchdog input pin (WDI) typically sources/sinks 8uA when driven high or low. So from a power dissipation point of view the duty cycle of the waveform at WDI is unimportant. When the WDI pin is floating or tri-stated the power supply current fall to less than 3uA. Glitch Rejection The TS823/824/825 family will reject negative going transients on the Vdd line to some extent. The smaller the duration of the transient the larger its amplitude may be without triggering a reset. The “Glitch Rejection” chart in the graphs section of this datasheet shows the relation between glitch amplitude and allowable glitch duration to avoid unintended resets. Accurate Output State at Low Vdd With Vdd voltage on the order of the MOS transistor threshold (<1V) the outputs of the TS823/824/825 may become undefined. For parts with active low output RESET a resistor placed between RESET and Gnd on the order of 100KΩ will ensure that the RESET output stays low when Vdd is lower than the threshold voltage of the part. In a like manner a resistor on the order of 100KΩ when placed between (RESET) and Vdd will ensure parts with active high output (RESET) will remain high when Vdd is lower than the threshold voltage of the parts. |
类似零件编号 - TS823CX5B |
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类似说明 - TS823CX5B |
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