Clocking Circuit
MS85010
Real-Time Clock and Calendar Circuit
Overview
The MS85010 is a CMOS real-time clock (RTC) and calendar circuit with an integrated quartz crystal. It features a programmable clock output, interrupt output, and low voltage detection. The MS85010 communicates via a two-wire bidirectional I2C bus, supporting a maximum bus transfer speed of 400kHz.
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Key Features
- ⚫ Based on a 32.768kHz crystal oscillator, provides year, month, day, week, hour, minute, and second
- ⚫Includes century flag, operational for years 2000–2199
- ⚫Integrated quartz crystal and tuning capacitors:
- ⚫Accuracy: 5±23ppm @ 25℃,
- ⚫Maximum equivalent error: 2.4 seconds/day
- ⚫Operating voltage: 1.2V ~ 5.5V
- ⚫I2C communication operating voltage: 1.6V ~ 5.5V
- ⚫Low power consumption
- ⚫I2C interface with speeds up to 400kHz
- ⚫Programmable clock output:(32.768kHz, 1.024kHz, 32Hz, 1Hz)
- ⚫Alarm and timer functions
- ⚫Low voltage detection and power-on reset
- ⚫Open-drain interrupt output pin
- ⚫eSOP8 package
Key Features
Mobile phones
Portable instruments
Electronic metering
Battery powered products
