描述：
DESCRIPTION The X1226 device is a Real Time Clock with clock/calendar, two polled alarms with integrated 512x8 EEPROM, 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. 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 • 512 x 8 Bits of EEPROM —64-Byte Page Write Mode —8 modes of Block Lock™ Protection —Single Byte Write Capability • High Reliability —Data Retention: 100 years —Endurance: 100,000 cycles per byte • 2-Wire™ Interface interoperable with I2C . —400kHz data transfer rate • Frequency Output (SW Selectable: Off, 1Hz, 4096Hz or 32.768kHz) • 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 • 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
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其他存储器
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