Our advantages    

Chinese manufacturing processes have undergone years of iteration, resulting in mature and reliable technologies. Many international corporations opt for production outsourcing in China. As an electronic components manufacturer in China, our products can fully replace those of major international brands in 99% of applications without the need for testing verification. Our products boast high consistency in quality, reasonable pricing, ample inventory, flexible supply, short lead times, and professional after-sales service.    

Description
The DS1302 is a slow-speed chargeable realtime clock (RTC) chip featuring a real-time clock/calendar and 31 bytes of non-volatile static RAM. It communicates with a microprocessor via a simple serial interface. The real-time clock/calendar counts seconds, minutes, hours, days, weeks, months, and years, automatically adjusting month-end dates for months fewer than 31 days and incorporating leap year correction. The clock operates in either a 24-hour format or a 12-hour format with AM/PM indication. The 31 bytes of RAM can temporarily store important data. Synchronous serial communication simplifies interfacing the DS1302 with a microprocessor, requiring only three wires: (1) RST (reset), (2) I/O (data line), and (3) SCLK (serial clock). Data can be transmitted in single- byte format or multi-byte format up to 31 bytes at a time. The DS1302 operates at very low power consumption, preserving data and clock information with less than 1µW of power.

Features

● Counts seconds, minutes, hours, days, weeks, months, and leap year-compensated years.
● Features 31 bytes of non-volatile static RAM for high-speed data storage.
● Wide operating voltage range: 2.0V to 5.5V.
● Low power consumption of less than 300nA at 2.5V.
● Supports single-byte or multi-byte data transfer for clock or RAM data read/write operations.
● Simple 3-wire interface for communication with microcontrollers.
● TTL compatible (VCC=5V).  Optional industrial temperature range from -40°C to +85°C.
● Package options: DIP8 and SOP8.

Applications

● Prepayment electric meters, IC card water meters, IC card gas meters
● Fax machines
● Portable instruments
● Mobile phones