GM8563S

The 8563 is a low-power CMOS real-time clock/calendar IC featuring a programmable clock output, interrupt output, and power-down detector. All addresses and data are transferred serially via the I²C bus interface at a maximum bus speed of 400 Kbit/s. The built-in word address register increments automatically after each read/write operation. This IC is widely used in battery-powered products such as mobile phones, portable instruments, and fax machines.

Key features

• Low standby current: typical 0.25 μA (VDD = 3 V @ 25 °C)
• Clock operating voltage: 1.0 V ~ 5.5 V (Tamb = 25 °C)
• 400 kHz I²C bus interface (VDD = 1.8 V ~ 5.5 V)
• Programmable clock output frequencies: 32.768 kHz, 1024 Hz, 32 Hz, 1 Hz
• Internal integrated oscillator capacitor
• Alarm and timer functions
• Internal power-on reset
• Open-drain interrupt output pin
• I²C bus slave address: read - 0A3H; write - 0A2H