X1227S8T1

2线RTC实时时钟进度/日历/ CPU监控器， EEPROM 2-Wire RTC Real TimeClock/Calendar/CPU Supervisor with EEPROM

DESCRIPTION

The X1227 device is a Real Time Clock with clock/calendar, two polled alarms with integrated 512x8 EEPROM, oscillator compensation, CPU Supervisor POR/LVS and WDT and battery backup switch.

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

  — 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

• 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