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PCF7921ATSM2AB1200 by NXP Semiconductors Design and production,in Hong Kong QX Electronics Limited Spot sales,And can pass Hong Kong QX Electronics Limited Purchasing。PCF7921ATSM2AB1200 Price reference $ 1.683370。PCF7921ATSM2AB1200 - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information PCF7921ATSM2AB1200 Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial