Product Summary

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 fewer 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.

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
?? TTL-Compatible (VCC = 5V)
?? Optional Industrial Temperature Range:
-40°C to +85°C
 DS1202 Compatible

Diagrams

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
DS1302ZN+T&R
DS1302ZN+T&R
Maxim Integrated Products
Real Time Clock Trickle-Charge Timekeeping Chip
Data Sheet
0-2090: $0.89
2090-2500: $0.89
Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
DS1300
DS1300
Other

Data Sheet
Negotiable 
DS1300-3
DS1300-3
Emerson / Astec Power
Linear and Switching Power Supplies 12V output, 1300W 2U x 3U x 7.5"
Data Sheet
0-4: $296.74
4-10: $285.51
10-25: $269.47
DS1301-7R
DS1301-7R

EURO-CASSETTE 100W 12V
Data Sheet
0-5: $629.64
DS1302
DS1302
Maxim Integrated Products
Real Time Clock Trickle-Charge Timekeeping Chip
Data Sheet
0-6900: $1.20
DS1302+
DS1302+
Maxim Integrated Products
Real Time Clock Trickle-Charge Timekeeping Chip
Data Sheet
0-1: $2.23
1-25: $1.50
25-50: $1.09
50-100: $1.07
DS1302N
DS1302N
Maxim Integrated Products
Real Time Clock Trickle-Charge Timekeeping Chip
Data Sheet
0-6910: $1.49