MC146818

The MC146818 real-time clock plus RAM is a peripheral device which includes the unique MOTEL concept for use with various microcessors,microcomputers,and larger computers.

The maximum ratings of the MC146818 can be summarized as:(1):the rating is supply voltage,the symbol is VDD,the value is -0.3 to +8.0,the unit is V;(2):the rating is all input voltage except OSC1,the symbol is Vin,the value is VSS-0.5 to VDD+0.5,the unit is V;(3):the rating is current drain per pin excluding VDD and VSS,the symbol is I,the value is 10,the unit is mA;(4):the operating temperature range,the symbol is TA,the rating is TL to TH,the unit is ;(5):the parameter is storage temperature range,the symbol is Tstg,the rating is -55 to +150,the unit is .

The thermal characteristics of the MC146818 can be summarized as the characteristic is thermal resistance plastic,the symbol is JA,the value is 120,the unit is /W.