RX8900CE:UB3

Built-in 32.768 kHz DTCXO, High Stability, Power switching

Key features

• Built-in frequency adjusted 32.768 kHz crystal unit and DTCXO
• Interface Type ：I2C-Bus
• Interface voltage range ：2.5 V to 5.5 V
• Temp. compensated voltage range ：2.0 V to 5.5 V
• Timekeeping voltage range ：1.6 V to 5.5 V
• Auto power switching function ：Automatically switches to backup power supply by monitoring the VDD voltage
• Interrupt output ：Wake up every minute or every second
• Alarm interruption ：Day, date, hour, minute
• Auto repeat wakeup timer interruption
• Interface type I²C -Bus interface Fast-Mode 400 kHz
• High stability
• UA: ± 3.4×10⁻⁶ / -40 ℃ to +85 ℃ (equiv. to ±9 s of mo. deviation)
• UB: ± 5.0×10⁻⁶ / -40 ℃ to +85 ℃ (equiv. to ±13 s of mo. deviation)
• UC: ± 5.0×10⁻⁶ / -30 ℃ to +70 ℃ (equiv. to ±13 s of mo. deviation)
• Auto power switch function: The VDD voltage is monitored and it switches to the backup power supply by the automatic operation. Backup power supply switching voltage 1.9 V Min.
• Clock output function: Output frequency is selectable from 32.768 kHz, 1024 Hz, 1 Hz
• Wakeup timer function:
• Selectable from 244 μs to 2.8 days (12 bit x 1 ch.)
• Timer source clock selectable from 1/60 Hz, 1 Hz, 64 Hz, 4096 Hz
• Auto release after interrupt output from /INT pin at timer completes. This operation is auto repeat with a selected cycle, it can be used like a watchdog timer
• Alarm function: It is possible program from day to minute
• Temp. sensor function: Available readout temperature data from embedded temp sensor