Suitable for mobile phones and various types of industrial, instrumentation, or medical applications, the real-time clocks CS-1302, 1307, and CT-1380, along with series C-8563, are based on a 32.768 kHz quartz crystal. The CS-1302 features 2.0 to 5.5-V operation, 31 x 8 RAM for scratch-pad data storage, and uses less than 300 nA at 2.0 V. Offered in 8-pin SPO and 8-pin DIP, the part offers year, with leap-year compensation, month, day of the week, hours, minutes, and seconds.
The CS-1307 offers a battery backup mode, I2 C interface, and 56 bytes of scratch-pad NVSRAM. The CT-1380 offers 2.0 to 5.5 V full operation, simple serial 3-wire interface, TTL compatibility, and less than 400 nA at 2.0 V.
Finally, the C-8563 RTC features 1.8 to 5.0-V operation and I2 C bus, alarm, and timer functions. It has a programmable clock output of 32.768 kHz, 1,024 Hz, 32 Hz, and 1 Hz. ($1.65 to $1.85 ea/sample qty; $0.55 to $0.65 ea/10,000 — available now.)
By Christina Nickolas
Cardinal Components , Wayne , NJ
James Magos 973-785-1333
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