NXP PCF85063AT RTC Calendar IC, I2C, SOIC-8

The NXP PCF85063AT/AAZ is a CMOS real-time clock (RTC) and calendar IC engineered for low-power applications. It provides precise timekeeping with year, month, day, weekday, hours, minutes, and seconds, based on a 32.768kHz quartz crystal.

Data transfer is handled via a two-line bidirectional I2C-bus at speeds up to 400kbit/s, with automatic address incrementing. The device operates from a supply voltage of 0.9V to 5.5V and draws a typical current of just 0.22µA at 3.3V and 25°C, making it ideal for battery-powered devices.

Key features include:

• Programmable clock output (32.768kHz, 16.384kHz, 8.192kHz, 4.096kHz, 2.048kHz, 1.024kHz, 1Hz)
• Selectable integrated oscillator load capacitors (7pF or 12.5pF)
• Alarm function and countdown timer
• Minute and half-minute interrupt
• Oscillator stop detection
• Internal power-on reset (POR)
• Programmable offset register for frequency adjustment

The IC is available in an 8-pin SOIC package and operates over a temperature range of -40°C to +85°C. It supports both 12-hour and 24-hour time formats, and the date format is YY-MM-DD-DW. This component is suitable for a variety of applications, including digital cameras, printers, and portable electronics, where accurate timekeeping with minimal power consumption is required.