Real Time Clock Module Dealers

The clockcalendar 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 AMPM indicator. The DS1307 has a built-in power-sense circuit that detects power failures and automatically switches to the backup supply. Timekeeping operation continues while the part operates from the backup supply. Key Features Completely Manages All Timekeeping Functions 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 56-Byte, Battery-Backed, General-Purpose RAM with Unlimited Writes Programmable Square-Wave Output Signal Simple Serial Port Interfaces to Most Microcontrollers I2C Serial Interface Low Power Operation Extends Battery Backup Run Time Consumes Less than 500nA in Battery-Backup Mode with Oscillator Running Automatic Power-Fail Detect and Switch Circuitry 8-Pin DIP and 8-Pin SO Minimizes Required Space Optional Industrial Temperature Range: -40°C to +85°C Supports Operation in a Wide Range of Applications

• Features: Serial I/O for Minimum Pin Count,2.0V to 5.5V Full Operation,Uses Less than 300nA at 2.0V

• Clock/Timer Function: Yes
• Model Name/Number: RTC DS1302 Real Time Clock Module
• Brand: REES52
• Part Number: DS1302

  Real-Time Clock Module-DS1307 Product ID: 1198 DS1307 I2C real-time clock chip (RTC) 24C32 32 K I2C EEPROM memories Includes LIR2032 rechargeable lithium battery with charging circuit Fully charged, it can work for 9 years or more Compact design, 27 x 28 x 8.4mm Can be cascaded to other I2C devices This Arduino Tiny RTC I2C module incorporates the DS1307 I2C real time clock IC and the 24C32 32K I2C EEPROM storage. What's more, it has a DS18B20 temperature sensor on board. All of this in a tiny package of 25mm x 28mm x 8.4mm. It comes with a LIR2303 rechargeable lithium battery, and a charging circuit is included in the module. When the temperature sensor is off, the RTC module can run for 1 year on a single charge. This module is used for applications such as data logging, timing applications ex. turning on the sprinklers at 4pm in the evenings. Since the module is self powered the time data is maintained even if the Arduino is powered off, allowing for building low power systems which can run for a long span of time without change of batteries.  

We are offering rtc module - s/n 808520. Feature: real-time clock (rtc) counts seconds, minutes, hours, date of the month, month, and day of the week, and year with leap-year compensation valid up to 2100. 56-byte, battery-backed, general-purpose ram with unlimited writes. I2c serial interface. Automatic power-fail detect and switch circuitry. Consumes less than 500na in battery-backup mode with oscillator running. Optional industrial temperature range: -40�c to +85�c. Available in 8-pin dip. connected with clock crystal of 32.768 khz.