MC146818A Datasheet (Motorola) - REAL-TIME CLOCK PLUS RAM

MC146818A, REAL-TIME CLOCK PLUS RAM

I Symbol I ltRrl * Min TBD TBD TDn I Max 1Reset Pulse Width Reset Delay Time D, ,1-DA,.,-.

C *-!AI; A+L I tRWL tRLH I +-, .,, [ I lTBDlms] * * I I I * I I ll~lmsl KS ps ..I I I I ps &s ‘i! I DS RESET .

* ITQ VDD 2k (KQ OnIV) L MM D7000 o

MC146818A Features

* a complete time-of-day clock with alarm and one hundred year calendar, a programmable periodic interrupt and square-wave generator, and 50 bytes of low-power static RAM. The MC146818A uses high-speed CMOS technology to interface with 1 MHz processor buses, while consuming very little power. The Rea