Product Summary

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)

Parametrics

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

Features

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.

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
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
DS1302N+
DS1302N+
Maxim Integrated Products
Real Time Clock Trickle-Charge Timekeeping Chip
Data Sheet
0-1: $2.79
1-25: $1.87
25-50: $1.36
50-100: $1.34
DS1302S
DS1302S
Maxim Integrated Products
Real Time Clock Trickle-Charge Timekeeping Chip
Data Sheet
0-6900: $1.20
DS1302S/T&R
DS1302S/T&R
Maxim Integrated Products
Real Time Clock Trickle-Charge Timekeeping Chip
Data Sheet
0-2000: $1.03
2000-7210: $1.03
DS1302S+
DS1302S+
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
DS1302S-16
DS1302S-16
Maxim Integrated Products
Real Time Clock Trickle-Charge Timekeeping Chip
Data Sheet
0-6905: $2.46