Clocking Circuit
MS85163
Real-time clock and calendar
Overview
The MS85163/MS85163M/MS85163D is a CMOS Real-Time Clock (RTC) and Calendar Circuit, specifically optimized for ultra-low power consumption. It integrates a programmable clock output, interrupt output, and a low-voltage detector for system monitoring.
All register addresses and data are transferred via a two-wire bidirectional I2C bus with a maximum bus speed of 400 kbps.
Available Packages: SOP8, MSOP8, DFN8.
Key Features
- • Year/Month/Date/Weekday/Hour/Minute/Second timing based on 32.768kHz crystal oscillator.
- • Century flag support for years 2000 to 2199.
- • Wide operating voltage: 1.2V to 5.5V.
- • I2C interface voltage: 1.6V to 5.5V (independent of VDD).
- • Ultra-low power consumption (typical 0.5μA at 3V).
- • High-speed I2C interface supporting up to 400kHz.
- • Programmable clock output with selectable frequencies:
- 32.768kHz, 1.024kHz, 32Hz, 1Hz.
- • Alarm and timer function for event triggering.
- • Low-voltage detector (LVD) with power-on reset (POR) override disable.
- • Open-drain interrupt output pin (INT) for system wake-up.
- • Package options: SOP8, MSOP8, DFN8.
Key Features
Mobile phones
Portable instruments
Electronic metering
Battery powered products
