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X1228

Intersil Corporation
Part Number X1228
Manufacturer Intersil Corporation
Description Real Time Clock/Calendar/CPU Supervisor
Published May 28, 2007
Detailed Description ® D FO NDE E M S OM RE C SI G N NOT NEW DE 2028 I SL 1 Data Sheet SEE R X1228 4K (512 x 8), 2-Wire™ RTC May 18, 2006 ...
Datasheet PDF File X1228 PDF File

X1228
X1228

Overview
® D FO NDE E M S OM RE C SI G N NOT NEW DE 2028 I SL 1 Data Sheet SEE R X1228 4K (512 x 8), 2-Wire™ RTC May 18, 2006 FN8100.
4 Real Time Clock/Calendar/CPU Supervisor 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 • CPU Supervisor Functions — Power-On Reset, Low Voltage Sense — Watchdog Timer (SW Selectable: 0.
25s, 0.
75s, 1.
75s, off) • Battery Switch or Super Cap Input • 512 x 8 Bits of EEPROM — 64-Byte Page Write Mode www.
DataSheet4U.
com — 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 — 14 Ld SOIC and 14 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 BLOCK DIAGRAM OSC Compensation 32.
768kHz X1 X2 Oscillator Frequency Divider 1Hz Timer Calendar Logic Time Keeping Registers (SRAM) Battery Switch Circuitry VCC VBACK PHZ/IRQ Select Control/ Registers (EEPROM) Status Registers (SRAM) Mask SCL ...


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