DS1302 RTC chip

The DS1302 is a low-power, real-time clock IC designed to keep track of time with minimal power consumption. It is commonly used in embedded systems and electronic devices where accurate timekeeping is essential, such as clocks, data loggers, and battery-operated devices. The DS1302 communicates with a microcontroller via a simple serial interface (SPI) and provides time information with a backup power supply to maintain clock operation during main power interruptions.

Key Features:

• Real-time clock (RTC) functionality with seconds, minutes, hours, day, date, month, and year information
• Low power consumption: typically 1 µA in battery backup mode
• Simple 3-wire serial interface (SPI)
• Operating voltage range: 2V to 5.5V
• Trickle charger for backup power supply (typically a coin cell battery)
• 31 bytes of battery-backed SRAM for data storage
• Programmable square-wave output signal
• Operating temperature range: -40°C to +85°C
• Available in DIP and surface-mount packages

Technical Specifications:

• Clock Accuracy: ±2 minutes per month at 25°C
• Backup Power Supply Current: Typically 1 µA
• Operating Voltage: 2V to 5.5V
• Interface: SPI (3-wire)
• Memory: 31 bytes of battery-backed SRAM
• Package Types: DIP-8, SOIC-8

Applications:

• Battery-powered clocks and timekeeping devices
• Embedded systems requiring time/date stamping
• Data loggers and recorders
• Consumer electronics
• Industrial automation

Datasheet:
For detailed technical specifications, refer to the DS1302 Datasheet.