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X1205

Xicor
Part Number X1205
Manufacturer Xicor
Description Real Time Clock/Calendar
Published Apr 17, 2005
Detailed Description Preliminary Information New Features Repetitive Alarms & Temperature Compensation X1205 Real Time Clock/Calendar FEATU...
Datasheet PDF File X1205 PDF File

X1205
X1205

Overview
Preliminary Information New Features Repetitive Alarms & Temperature Compensation X1205 Real Time Clock/Calendar FEATURES • Real Time Clock/Calendar —Tracks time in Hours, Minutes, and Seconds —Day of the Week, Day, Month, and Year • 2 Polled Alarms (Non-volatile) —Settable on the Second, Minute, Hour, Day of the Week, Day, or Month —Repeat Mode (periodic interrupts) • Oscillator Compensation on chip —Internal feedback resistor and compensation capacitors —64 position Digitally Controlled Trim Capacitor —6 digital frequency adjustment settings to ±30ppm • Battery Switch or Super Cap Input • 2-Wire™ Interface interoperable with I2C* —400kHz data transfer rate • Low Power CMOS —1.
25µA Operating Current (Typical) • Small Package Options —8-Lead SOIC and 8-Lead TSSOP APPLICATIONS • • • • Utility Meters HVAC Equipment Audio / Video Components Set Top Box / Television • • • • • • • • • • • 2-Wire™ RTC DESCRIPTION IM Oscillator BLOCK DIAGRAM PR EL OSC Compensation Frequency Divider 1Hz Timer Calendar Logic 32.
768kHz X1 X2 IN Status Registers (SRAM) Alarm The X1205 device is a Real Time Clock with clock/ calendar, two polled alarms, oscillator compensation, and battery backup switch.
The oscillator uses an external, low-cost 32.
768kHz crystal.
All compensation and trim components are integrated on the chip.
This eliminates several external discrete components and a trim capacitor, saving board area and component cost.
The Real-Time Clock keeps track of time with separate registers for Hours, Minutes, and Seconds.
The Calendar has separate registers for Date, Month, Year and Day-of-week.
The calendar is correct through 2099, with automatic leap year correction.
A R Modems Network Routers, Hubs, Switches, Bridges Cellular Infrastructure Equipment Fixed Broadband Wireless Equipment Pagers / PDA POS Equipment Test Meters / Fixtures Office Automation (Copiers, Fax) Home Appliances Computer Products Other Industrial / Medical / Automotive Y Alarm Time Keeping Reg...


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