Product Summary

The DS1302 Trickle Charge Time keeping 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/calendarprovides seconds, minutes, hours, day, date, month, and year information. The end of the month date isautomatically adjusted for months with less than 31 days, including corrections for leap year. The clockoperates in either the 24-hour or 12-hour format with an AM/PM indicator.

Parametrics

The absolute maximum ratings of DS1302 are (1)Voltage on Any Pin Relative to Ground:-0.5V to +7.0V; (2)Operating Temperature: 0°C to 70°C or - 40°C to +85°C for industrial; (3)Storage Temperature:-55°C to +125°C; (4)Soldering Temperature:260°C for 10 seconds (DIP)

Features

The features of DS1302 can be summarized as (1)Real time clock counts seconds, minuteshours, date of the month, month, day of theweek, and year with leap year compensationvalid up to 2100; (2)31 x 8 RAM for scratchpad data storage; (3)Serial I/O for minimum pin count; (4)2.0-5.5V full operation; (5)Uses less than 300 nA at 2.0V; (6)Single-byte or multiple-byte (burst mode)data transfer for read or write of clock orRAM data; (7)8-pin DIP or optional 8-pin SOICs forsurface mount; (8)Simple 3-wire interface; (9)TTL-compatible (VCC = 5V); (10)Optional industrial temperature range-40°C to +85°C; (11)Recognized by Underwriters Laboratory

Diagrams

<P><IMG alt="DS1302 Pin Configuration" src="http://www.seekic.com/uploadfile/ic-mfg/20128320596349.jpg" border=0></P>

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+T&R
DS1302S+T&R

Maxim Integrated Products

Real Time Clock Trickle-Charge Timekeeping Chip

Data Sheet

0-1530: $0.89
1530-2000: $0.87