Product Summary

The DS1302S is a trickle-charge timekeeping chip. The DS1302S 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.

Parametrics

DS1302S absolute maximum ratings: (1)Voltage Range on Any Pin Relative to Ground: -0.5Vto +7.0V; (2)Operating Temperature Range, Commercial: 0 to +70℃; (3)Operating Temperature Range, Industrial (IND): -40 to +85℃; (4)Storage Temperature Range: -55 to +125℃; (5)Soldering Temperature (leads, 10 seconds): 260℃.

Features

DS1302S features: (1)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; (2)31 × 8 Battery-Backed General-Purpose RAM; (3)Serial I/O for Minimum Pin Count; (4)2.0V to 5.5V Full Operation; (5)Uses Less than 300nA at 2.0V; (6)Single-Byte or Multiple-Byte (Burst Mode) Data Transfer for Read or Write of Clock or RAM Data; (7)8-Pin DIP or Optional 8-Pin SO for Surface Mount; (8)Simple 3-Wire Interface; (9)TTL-Compatible (VCC = 5V); (10)Optional Industrial Temperature Range: -40 to +85℃; (11)DS1202 Compatible; (12)Underwriters Laboratories (UL) Recognized.

Diagrams

DS1302S block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
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
DS1302S-16
DS1302S-16

Maxim Integrated Products

Real Time Clock Trickle-Charge Timekeeping Chip

Data Sheet

0-6905: $2.46
DS1302S-16/T&R
DS1302S-16/T&R

Maxim Integrated Products

Real Time Clock Trickle-Charge Timekeeping Chip

Data Sheet

0-1000: $1.93
1000-6920: $1.93
DS1302SN
DS1302SN

Maxim Integrated Products

Real Time Clock Trickle-Charge Timekeeping Chip

Data Sheet

0-6910: $1.49
DS1302SN/T&R
DS1302SN/T&R

Maxim Integrated Products

Real Time Clock Trickle-Charge Timekeeping Chip

Data Sheet

0-2000: $1.18
2000-6940: $1.18