RV-8523 Datasheet, PDF (5/57 Pages) MICORO CRYSTAL SWITZERLAND – Real Time Clock

Micro Crystal
Real Time Clock / Calendar Module
RV-8523
RV-8523
I²C-Bus Interface Real Time Clock / Calendar Module
1. OVERVIEW
• RTC module with built-in crystal oscillating at 32.768 kHz
• 1 MHz Fast-mode Plus (Fm+) two-wire I²C interface
• Wide Interface operating voltage: 1.6 – 5.5 V
• Wide clock operating voltage: 1.2 – 5.5 V
• Ultra low power consumption: 130 nA typ @ 3.0V / 25°C
• Provides year, month, day, weekday, hours, minutes, seconds
• Freely programmable Alarm and Timer functions with interrupt capability
• Low voltage detector, internal power on reset
• Battery backup input pin and switch-over circuit
• INT_1 can be programed either as interrupt or clock output (open-drain)
• Programmable clock output for peripheral devices (32.768 kHz, 16.384 kHz, 8192 Hz, 4096 Hz, 1024 Hz,
32 Hz and 1 Hz)
• Programmable offset register for frequency adjustment
• I²C slave address: read D1h, write D0h
• Available in small and compact package size, RoHS-compliant and 100% leadfree:
C3: 3.7 x 2.5 x 0.9 mm
2. GENERAL DESCRIPTION
The RV-8523 is a CMOS real time clock / calendar optimized for low power consumption. Data is transferred
serially via an I²C bus with a maximum data rate of 1000 kbit/s. Alarm and timer functions are available with the
possibility to generate a wake-up signal on an interrupt pin. An offset register allows fine-tuning of the clock. The
RV-8523 has a backup battery switch-over circuit, which detects power failures and automatically switches to the
battery supply when a power failure occurs.
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