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REV: 110805

Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device

may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata.

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

2.0V 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 Laboratory (UL) Recognized

PIN CONFIGURATIONS

ORDERING INFORMATION

PART

TEMP RANGE

PIN-PACKAGE

TOP MARK*

DS1302

0°C to +70°C

8 PDIP (300 mils)

DS1302

DS1302+

0°C to +70°C

8 PDIP (300 mils)

DS1302

DS1302N

-40°C to +85°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

DS1302S+

0°C to +70°C

8 SO (208 mils)

DS1302S

DS1302SN

-40°C to +85°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

DS1302Z+

0°C to +70°C

8 SO (150 mils)

DS1302Z

DS1302ZN

-40°C to +85°C

8 SO (150 mils)

DS1302ZN

DS1302ZN+

-40°C to +85°C

8 SO (150 mils)

DS1302ZN

DS1302S-16

0°C to +70°C

16 SO (300 mils)

DS1302S16

DS1302SN-16

-40°C to +85°C

16 SO (300 mils)

DS1302SN16

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

*An N anywhere on the top mark indicates an industrial temperature grade

device. A + anywhere on the top mark indicates a lead-free device.

DS1302

Trickle-Charge Timekeeping Chip

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)

X1

X2

GND

I/O

N.C.

N.C.

CE

12

11

10

9

5

6

7

8

SO (300 mils)

1

2

3

4

N.C.

SCLK

N.C.

16

15

14

13

N.C.

N.C.

N.C.

N.C.

TOP VIEW