DS1302

TIGER ELECTRONIC CO.,LTD Trickle Charge Timekeeping Chip FEATURES Real time clock counts seconds, minutes hours, date of the month, month, day of the week, and year with leap year compensation valid up to 2100 31 x 8 RAM for scratchpad data storage Serial I/O for minimum pin count 2.0–5.5V full operation Uses less than 300 nA at 2.0V Single–byte or multiple–byte (burst mode) data transfer for read or write of clock or RAM data 8–pin DIP or optional 8–pin SOICs for surface mount Simple 3–wire interface TTL–compatible (VCC = 5V) Optional industrial temperature range –40°C to +85°C DS1202 compatible Recognized by Underwriters Laboratory DS1302 PIN ASSIGNMENT VCC2 X1 X2 GND 1 2 3 4 8 7 6 5 VCC1 SCLK I/O RST DS1302 8-Pin DIP (300 mil) VCC2 X1 X2 GND 1 2 3 4 8 7 6 5 VCC1 SCLK I/O RST DS1302S 8-Pin SOIC (200 mil) DS1302Z 8-Pin SOIC (150 mil) VCC2 NC X1 NC X2 NC NC GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC1 NC SCLK NC I/O NC NC RST ORDERING INFORMATION PART # DS1302 DS1302N DS1302S DS1302SN DS1302Z DS1302ZN DS1302S-16 DS1302SN-16 DESCRIPTION 8–Pin DIP 8-Pin DIP (Industrial) 8–Pin SOIC (200 mil) 8–Pin SOIC (Industrial) 8–Pin SOIC (150 mil) 8–Pin SOIC (Industrial) 16-Pin SOIC (300 mil) 16-Pin SOIC (Industrial) 16-Pin SOIC PIN DESCRIPTION X1, X2 GND RST – 32.768 kHz Crystal Pins – Ground – Reset – Data Input/Output – Serial Clock – Power Supply Pins I/O SCLK VCC1, VCC2 DESCRIPTION The DS1302 Trickle Charge Timekeeping Chip contains a real time clock/calendar and 31 bytes ...