DS1302

Trickle-Charge Timekeeping Chip

1 of 13

REV: 120208

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 Battery-Backed General-Purpose RAM

Serial I/O for Minimum Pin Count

2.0V to 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 SO for Surface

Mount

Simple 3-Wire Interface

Optional Industrial Temperature Range:

-40°C to +85°C

DS1202 Compatible

Underwriters Laboratories (UL®)

Recognized

PIN CONFIGURATIONS

ORDERING INFORMATION

PART

TEMP RANGE

PIN-PACKAGE

TOP MARK*

DS1302+

0°C to +70°C

8 PDIP (300 mils)

DS1302

DS1302N+

-40°C to +85°C

8 PDIP (300 mils)

DS1302

DS1302S+

0°C to +70°C

8 SO (208 mils)

DS1302S

DS1302SN+

-40°C to +85°C

8 SO (208 mils)

DS1302S

DS1302Z+

0°C to +70°C

8 SO (150 mils)

DS1302Z

DS1302ZN+

-40°C to +85°C

8 SO (150 mils)

DS1302ZN

+Denotes a lead-free/RoHS-compliant package.

*An N anywhere on the top mark indicates an industrial temperature grade device. A + anywhere on the top mark indicates a lead-free device.

UL is a registered trademark of Underwriters Laboratories, Inc.

www.maxim-ic.com

SCLK

I/O

CE

X1

X2

GND

8

7

6

5

1

2

3

4

DIP (300mils)

X1

X2

GND

SCLK

I/O

CE

8

7

6

5

1

2

3

4

SO (208 mils/150 mils)

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