(5pcs) DS1307ZM/TR SOP8 — Five DS1307 realtime clock ICs in SOP8 (tapeandreel) packaging. The DS1307 is a compact, lowpower RTC/calendar with battery backup and I2C interface, designed for reliable timekeeping in embedded systems. Key benefits Keeps accurate, continuous time: full clock/calendar (seconds, minutes, hours, day, date, month, year) with automatic leapyear compensation. Batterybacked operation: maintains time and user data when main power is removed, preventing data loss and eliminating manual time resets after power outages. Easy integration: standard I2C (twowire) interface simplifies connection to microcontrollers and host processors, reducing development time. Surfacemount convenience: SOP8 package suited for automated PCB assembly; TR (tapeandreel) packaging supports pickandplace production. Primary features and attributes Model: DS1307ZM/TR (DS1307 realtime clock IC). Quantity: 5 pieces per . Package: SOP8 surfacemount package; tapeandreel (TR) packaging for assembly. Interface: I2C (twowire) serial interface — standard addressing (0x68). Timekeeping: seconds, minutes, hours, day, date, month, year; automatic leapyear compensation. Time base: requires external 32.768 kHz crystal for accurate timekeeping. Nonvolatile RAM: 56 bytes of batterybacked RAM for user data storage. Power backup: batterybacked timekeeping when main VCC is removed. Design: lowpower CMOS for long battery life in backup mode. Compatibility: designed for common I2C host controllers and microcontroller platforms; suitable for embedded systems where a dedicated RTC is needed. Manufacturer: Maxim/Dallas Semiconductor (DS1307 family). How it solves problems Eliminates the need to reset the clock after power loss by maintaining time with a backup battery. Frees host microcontroller resources by offloading timekeeping to a dedicated IC. Reduces PCB component count and design complexity by providing a complete RTC/calendar plus batterybacked RAM in one small package. Example use cases Embedded data logger: keeps accurate timestamps on recorded sensor data even when the main system loses power. Consumer appliance or industrial control panel: provides continuous realtime clock and calendar functions for scheduling, display, and event logging. Networked or standalone electronics: supplies a reliable hardware time base for timestamping events and coordinating timed operations in microcontrollerbased projects. What to expect in implementation Requires a 32.768 kHz watch crystal connected to the dedicated oscillator pins for timebase. Communicate and configure via the standard I2C twowire interface; commonly supported by microcontroller libraries. Use the 56 bytes of batterybacked RAM to retain small configuration or status information across power cycles. SOP8 and tapeandreel packaging support automated surfacemount assembly for production builds. This listing provides five DS1307ZM/TR SOP8 RTC ICs ready for boardlevel integration where reliable, batterybacked timekeeping and small form factor are required.