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RTC Real Time Clock/Calendar/CPU Supervisor

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Data Sheet
April 14, 2006
X1288
FN8102.3
2-WireRTC Real Time
Clock/Calendar/CPU Supervisor with
EEPROM
FEATURES
• Real Time Clock/Calendar
— Tracks time in Hours, Minutes, Seconds and
Hundredths of a Second
— 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 setting 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
• 32K x 8 Bits of EEPROM
www.DataSheet4U.com — 128-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
BLOCK DIAGRAM
• 2-Wire™ Interface interoperable with I2C*
— 400kHz data transfer rate
• Frequency Output (SW Selectable: Off, 1Hz, 100Hz,
or 32.768kHz)
• Low Power CMOS
— 1.25µA Operating Current (Typical)
• Small Package Options
— 16-Lead SOIC and 14-Lead TSSOP
• 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
32.768kHz
X1
X2
PHZ/IRQ
Select
SCL
SDA
Serial
Interface
Decoder
RESET
Control
Decode
Logic
8
OSC
Compensation
Oscillator
Frequency 1Hz
Divider
Timer
Calendar
Logic
Control/
Registers
(EEPROM)
Status
Registers
(SRAM)
Alarm
Watchdog
Timer
Low Voltage
Reset
Time
Keeping
Registers
(SRAM)
Compare
Alarm Regs
(EEPROM)
256K
EEPROM
ARRAY
Battery
Switch
Circuitry
VCC
VBACK
1
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.
I2C is a trademark of Philips. Copyright Intersil Americas Inc. 2005, 2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
Intersil Corporation
Intersil Corporation



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