The output protection circuit of digital integrated circuit

Published:2011/7/7 6:48:00 Author:Sophia | Keyword: Digital integrated circuit, Output protection circuit | From:SeekIC

The output of digital integrated circuits must also be protected. Figure a, bare the output protection circuit. Figure a is common protection circuit, Figure (b) is the protection circuit of ELA-422-A. It is the same as the input protection circuit, and resistance R is used to limit the current flowing through output, the diode is used to limit the external input signal level and limit the signal in the range of (0.6V) ~ (Ucc +0.6 V). The resistivity of resistance R is slightly lower than the resistivity of input protective resistance, so that the impact of pressure drop on R can be reduced.



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