DS1302

Trickle Charge Timekeeping Chip

www.artschip.com

1

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 300nA 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

℃ to +85℃

DS1202 compatible

Recognized by Underwriters Laboratory

ORDERING INFORMATION

PART#

DESCRIPTION

DS1302

8-Pin DIP

DS1302N

8-Pin DIP (Industrial)

DS1302S

8-Pin SOIC (200 mil)

DS1302SN

8-Pin SOIC (Industrial)

DS1302Z

8-Pin SOIC (150 mil)

DS1302ZN

8-Pin SOIC (Industrial)

DS1302S-16

16-Pin SOIC (300 mil)

DS1302SN-16

16-Pin SOIC (Industrial)

PIN ASSIGNMENT

DS1302

8-Pin DIP (300 mil)

DS1302S 8-Pin SOIC (200 mil)

DS1302Z 8-Pin SOIC (150 mil)

16-Pin SOIC

PIN DESCRIPTION

X1,X2

-32.768 kHz Crystal Pins

GND

-Ground

-Reset

I/O

-Data Input/Output

SCLK

-Serial Clock

-Power Supply Pins

DESCRIPTION

The DS1302 Trickle Charge Timekeeping Chip contains a real time clock/calendar and 31 bytes of static RAM. It communicates

with a microprocessor via a simple serial interface. The real time clock/calendar provides seconds, minutes, hours, day, date,

month, and year information. The end of the month date is automatically adjusted for months with less than 31 days, including

corrections for leap year. The clock operates in either the 24-hour or 12-hour format with an AM/PM indicator.