Incorporates industry standard DS1287 PC clock plus enhanced features: § +3- or +5V operation § 64-bit silicon serial number § 64-bit customer specific ROM or additional .

X1 X2 RCLR AD0-AD7 PWR KS CS ALE WR RD VCCO IRQ ORDERING INFORMATION PART # DS1689S DS1689SN DS1693 DESCRIPTION RTC IC, 28-pin SOIC RTC IC, 28-pin SOIC IND RTC Module; 28-pin DIP SQW VCCI GND VBAT VBAUX PSEL CEI CEO - Crystal Input - Crystal Ou.

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