X1226集成電路（IC）的實時時鐘規(guī)格書PDF中文資料

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