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X1226 Datasheet(PDF) 1 Page - Intersil Corporation |
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X1226 Datasheet(HTML) 1 Page - Intersil Corporation |
1 / 25 page 1 ® FN8098.3 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005-2006. All Rights Reserved All other trademarks mentioned are the property of their respective owners. X1226 4K (512 x 8), 2-Wire™ RTC Real Time Clock/Calendar with EEPROM 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 Ld SOIC and 8 Ld TSSOP • Repetitive Alarms • Temperature Compensation • Pb-Free Plus Anneal Available (RoHS Compliant) 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 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. BLOCK DIAGRAM X1 X2 Oscillator Frequency Timer Logic Divider Calendar 8 Control/ Registers 1Hz Time Keeping Registers Alarm Regs Compare Control Decode Logic Alarm (EEPROM) (EEPROM) SCL SDA Serial Interface Decoder 4K EEPROM ARRAY Registers Status (SRAM) Select PHZ/IRQ VCC VBACK 32.768kHz (SRAM) Battery Circuitry Switch OSC Compensation Data Sheet May 8, 2006 |
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