FRTC8900CE

This module is an I2C bus interface-compatible real-time clock incorporating a 32.768 kHz DTCXO. In addition to calendar functions (year, month, day, day of week, hour, minute, second) and clock counter functions, the module offers a wide range of additional features, including alarm function, wakeup timer function, time update interrupt function, and 32.768 kHz output function. Through battery backup switching function and interface power supply input pins, the Scan FRTC8900 supports various power supply circuits. The devices in this module are fabricated using C-MOS technology to achieve low current consumption, enabling long-term battery backup operation.

Key features

• Built-in 32.768 kHz DTCXO
• High stability: < ±3.0 ppm
• I²C bus high-speed mode support (up to 400 kHz)
• Alarm interrupt with day, date, hour, and minute settings
• Wake-up timer interrupt
• Time update interrupt for seconds and minutes
• Temperature-compensated 32.768 kHz output with OE function (FOE and FOUT pins)
• Auto leap year correction (2000 to 2099)
• Wide interface voltage range: 2.5 V ~ 5.5 V
• Wide timekeeping voltage range: 1.6 V ~ 5.5 V
• Low current consumption: 0.54 μA / 3 V (typical)
• Built-in backup switchover circuit (trickle charging)
• Industrial temperature range (-40°C ~ +85°C)