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Technical content
Features
Extremely low current consumption Miniature package with integrated crystal Trickle charger, power management & switch Backup battery input (internal switchover) Programmable alarm, timer and interrupt 0.80 0.30 0.90 (max) 3.70 (typ) 2.50 (typ) SOLDER PAD LAYOUT TOP VIEW 0.60 0.50 0.80 0.80 5 3.00 PAD CONNECTION Supply (VDD) Capacitor RC-oscillator Clock/Interrupt (CLK/INT) Serial clock input (SCL) Serial data (SDA) PAD CONNECTION Ground (VSS) Backup supply voltage Power switch output (PSW) Watchdog input (WDI) Reset output (RST) Product name eg: RV1805C3 ±25ppm -40+85°C Option code X (eg RV1805C3/X) denotes a custom spec.
Ordering Information
Available on T&R - 1k or 3k pcs per reel Evaluation / development board & manual av ailable on request The I2C-Bus is a trademark of Philips Electronics NV Block Diagram This RTC IC has been specially designed for ultimate low current consumption of typically 60 nA @ VDD 3.0V for 32.768 kHz XTAL mode. Additionally, there is an RC-Mode consuming only 17nA and an autocalibrated RC-mode consuming 22nA which permits to operate this RTC module several hours at Backup Supply Voltage using low-cost MLCC. The very small SMT ceramic-package combines the 32.768 kHz crystal unit with the CMOS-based oscillator and real-time-clock IC. The calender function track year, month, date, and day-of-the-week. Thefactory calibrated clock achieves a time accuracy of typ. ±2.0 ppm @ 25°C and tracks hundredths of second, second, minute and hour in AM/PM or 24-hour format. Additional features include Alarm, Timer and Interrupt functions, Watchdog Timer, Power Management with Power-Switch, Trickle Charger and Automatic Switchover to backup supply voltage.
Description
Manufactured by Micro Crystal Stocked & supplied by Golledge
14 Oct 2014
Standard. Optional - Please specify required code(s) when ordering Frequencies (programmable): 32.768kHz ~ 1/60Hz Frequency tolerance @ 25°C: ±100ppm typ Time accuracy: ±2ppm typ (0.17s/day) @ 25°C Operating temperature range: -40 t o +85°C Storage temperature range: -55 t o +125°C Fr equency / temp coefficient: Supply voltage (V DD): I 2C bus active 1.6 ~ 3.6V Time-keeping mode 1.5 ~ 3.6V Supply current (I 2C, fscl=400kHz): 6 μA typ (VDD=3.0V, ) 1.5μA typ (VDD=1.7V) Supply current (time-keeping VDD=3V): 60nA typ, 80nA max (32kHz XTL) 17nA typ, 25nA max (RC MODE) 22nA typ, 32nA max (RC AUTOCAL) Ageing: ±3ppm max fir st year Shock and vibration resistance: ±5ppm, 5,000g, 0.3ms, ½ sine ±5ppm, 20g, 10.0 ~ 2,000Hz Soldering condition: Reflow, 260°C, 20 sec max