555 smoking prohibition language warning circuit

Published:2011/5/24 3:21:00 Author:TaoXi | Keyword: smoking, prohibition, language warning | From:SeekIC

The monostable trigger circuit is composed of the 555 circuit and the R2，C1, when this circuit is triggered by the low electrical level (1/3VDD), it outputs the high electrical level, the high-level maintenance time td=1.1R2C1. The IC2 uses the CMOS language integrated circuit HFC5221A, the soft package structure is as shown in figure (b), the shape dimension is 24mm x 14mm, it's electrical parameters are: The operating voltage is 2.4V～5V, the rated voltage is 4.4V; the quiescent current is lower than 1uA, the output port driving current is 3～6mA, the using temperature is -10℃～60℃, the trigger mode is the high electrical level and positive pulse trigger.



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