PCF8563 PCF8563T 8563 Module RTC Breakout Board
$1.121pcs
The PCF8563 real-time clock RTC module features high-precision timing and low-power operation. serves a stable and reliable time reference.
| Dimensions | 43 × 17.5 mm |
|---|---|
| Brand |
easyelecmodule |
1998 in stock
Product Introduction of PCF8563 RTC board
The PCF8563 is a CMOS Real-Time Clock (RTC) and calendar optimized for low power consumption. A programmable clock output, interrupt output, and voltage-low detector are also provided. All addresses and data are transferred serially via a two-line bidirectional I2C-bus. Maximum bus speed is 400 kbit/s. The register address is incremented automatically after each written or read data byte.
Package List
pcf8563 rtc board *1;
CR1220 coin cell battery *1;
1×6 pin header;
Features
1. The PCF8563 RTC Board provides the real-time clock/calendar function, which can be driven by a battery on board and works independently even when the MCU is turned off.
2. Low-cost, extremely accurate I2C real-time clock (RTC).
3. More steady and precise than DS1302 or DS1307
4. Support I2C bus cascade (by pin, row docking method, which can use multiple I2C module)
5. All the possible elicitations: In addition to the necessary interfaces for SDA and SCL, the INT and COT that may be used are also elicited.
Specification
| Item | Description |
|---|---|
| Wide Voltage Range | 1.0-5.5 V (Volts) |
| Typical Value | 0.25 µA (Microamps) (Note: Per the PCF8563 chip characteristics, this parameter typically refers to the chip’s standby current) |
| Output Frequency | 32.768 kHz (Kilohertz), 1024 Hz (Hertz), 32 Hz (Hertz), 1 Hz (Hertz) |
| Battery | CR1220 Type 3V (Volts) Button Battery |
| Board Size | Approx. 4.3×1.7 cm (Centimeters) / 1.7×0.7 in (Inches) |
PCF8563 pinout
Circuit Schematic Description
Module Pins | Function Description |
VCC | Power Supply (3.3V/5V ) |
GND | Ground |
SDA | I2C Data Line |
SCL | I2C Clock Line |
INT | Interrupt Output |
1. Power Supply (VCC): The module receives external power (e.g., 5V or 3.3V from an Arduino) through the VCC pin. This power source supplies the PCF8563’s VDD pin and all peripheral circuits on the module.
2. Backup Battery: The module includes a CR1220 coin cell holder. The battery’s positive terminal connects to the PCF8563’s Vbat pin, and its negative terminal is grounded. When the main power (VCC) is disconnected, the backup battery maintains the RTC’s operation to retain timekeeping data.
3. I2C Communication Interface: The PCF8563’s SCL (pin 2) and SDA (pin 5) lines are internally pulled up to VCC via 1kΩ resistors (no external pull-ups are needed, avoiding bus resistance conflicts). These lines are exposed as the module’s SCL and SDA pins, which connect to an Arduino’s A5 (SCL) and A4 (SDA) pins (or equivalent I²C pins on other controllers).
4. Clock Oscillator Circuit: The PCF8563 uses a 32.768kHz crystal oscillator as its timekeeping reference. Matching capacitors (e.g., 12pF) are connected in series between each side of the crystal and ground. These capacitors ensure stable oscillation (capacitance values directly impact timing accuracy).
5. Optional Pins: INT (Interrupt Output, PCF8563 pin 3): Configurable to generate interrupt signals for events like alarms or timers. The module may expose this pin for external use.
6. Brownout Detection Mechanism: The PCF8563 integrates an internal low-voltage detection circuit. When the VDD supply voltage falls below a predefined threshold, the VL bit (the 7th bit of the seconds register) is set to logic ‘1’ This bit flags potential timekeeping inaccuracies. To clear the VL bit, software intervention is required.
Notes
1. The yellow pin shall be attached to the customer during delivery, but not welded to the board;
Applications
Mobile telephones
Portable instruments
Electronic metering
Battery powered products
Shipping Cost
We only ship to the United States. Shipping costs are calculated based on the total order amount.
Shipping Method And Delivery Time
All orders will be processed and shipped within 72 hours of placing the order (excluding weekends and holidays). They will ship from Shenzhen, China, primarily via 4PX logistics. Depending on the destination and logistics conditions, other carriers such as DHL, FedEx, UPS, USPS, etc., may also handle the delivery. Estimated shipping time is 7-12 business days, with actual delivery occurring in 10-17 business days, depending on logistics conditions.
Payment:
We accept Visa, Master card, Maestro, American Express, JCB, Dinner's Club, Discover, Paypal, Apple Pay, Google Pay .
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