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
