USB RTC is an open source real-time clock device that comprises MCP2221, a USB-to-UART/I2C serial converter, which enables USB connectivity, in the processes that include a USB, UART(Serial), GPIO, and I2C interfaces. It runs on Hi-tech DS3231 RTC chip, an accurate I2C, runs the USB RTC with extremely high efficiency at a low cost. USB RTC for Raspberry Pi has cross-platform support which makes it enable to work on different platforms like Windows, MAC, etc.

Features:

• Temperature-compensated crystal oscillator
• DS3231 advanced processor
• MCP2221
• I2C/SMBus supported clock and data lines
• User-selectable via jumper cable for 3.3V or 5V level output (up to 500 mA)
• Four GPIO lines that are configurable for GPIO Operations
• Pins for Serial(UART) Communication
• Supports full-speed USB (12 Mb/s)
• 64-byte Transmit
• 64-byte Receive
• USB 2.0 Compliant
• Low-Power Consumption

Specifications:

• Accuracy ±2ppm from 0°C to +40°C
• Accuracy ±3.5ppm from -40°C to +85°C
• Battery Backup Input for Continuous Timekeeping
• Operating Temperature Ranges Commercial: 0°C to +70°C Industrial: -40°C to +85°C
• Low-Power Consumption
• Real-Time Clock Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap Year Compensation Valid Up to 2100
• Two Time-of-Day Alarms
• Programmable Square-Wave Output
• Fast (400kHz) I2C Interface
• 3.3V Operation
• Digital Temp Sensor Output: ±3°C Accuracy

Kit Content:

• 1 x USB RTC for Raspberry Pi

Note: Raspberry Pi is not included!