PCF8563 clock/timer
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The PCF8563 is a CMOS Real-Time Clock (RTC) and calendar optimized for low power consumption. It includes a programmable clock output, an interrupt output, a voltage-low detector, and a backup battery input. The clock/calendar provides seconds, minutes, hours, day, weekday, month, and year information. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap years. The clock operates in either the 24-hour or 12-hour format with an AM/PM indicator.
Key Features:
- Low power CMOS RTC
- Provides year, month, day, weekday, hours, minutes, and seconds
- Automatic leap year correction
- Programmable clock output for peripheral devices
- Programmable alarm with interrupt function
- Operating voltage range: 1.0V to 5.5V
- I²C-bus interface
- Backup battery input
- Low backup current: 0.25 µA (typical)
- Compact 8-pin SOIC package
- Operating Voltage: 1.0V to 5.5V
- Backup Battery Voltage: 1.0V to 5.5V
- Current Consumption:
- IDD = 200 µA (maximum at VDD = 5.5V)
- Iback-up = 0.25 µA (typical at VDD = 3.0V)
- Timekeeping Accuracy: ±5 ppm from -40°C to +85°C
- Clock Frequency: 32.768 kHz
- Interface: I²C-bus (up to 400 kHz)
- Clock Output Frequency: Programmable to 32.768 kHz, 1.024 kHz, 32 Hz, and 1 Hz
- Operating Temperature Range: -40°C to +85°C
- Package: 8-pin SOIC
- Timekeeping: Suitable for keeping accurate time and date in electronic systems.
- Data Logging: Used in applications requiring timestamping of data.
- Alarms and Timers: Provides programmable alarm and timer functions for various applications.
- Consumer Electronics: Used in devices such as digital cameras, MP3 players, and home appliances.
- Industrial Control: Provides timekeeping and scheduling functions in industrial automation systems.
- Automotive Systems: Maintains accurate timekeeping in automotive applications.
Technical Specifications:
- Logic Family: CMOS
- Number of Channels: 3
- Switch Configuration: Single-Pole Double-Throw (SPDT)
- Supply Voltage Range: 3V to 15V
- “ON” Resistance (R_ON): 125Ω typical at V_DD = 10V
- “OFF” Leakage Current (I_OFF): ±100pA typical at V_DD = 10V
- Control Input Voltage (V_IH): 0.7 V_DD min, 0.3 V_DD max
- Maximum Operating Frequency: 40 MHz at V_DD = 10V
Applications:
- Signal routing and switching
- Analog and digital multiplexing
- Audio and video signal processing
- Data acquisition systems
- Test equipment