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X1228_06 Datasheet, PDF (1/29 Pages) Intersil Corporation – Real Time Clock/Calendar/CPU Supervisor with EEPROM | |||
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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
â Tracks Time in Hours, Minutes, and Seconds
â Day of the Week, Day, Month, and Year
⢠2 Polled Alarms (Non-volatile)
â Settable on the Second, Minute, Hour, Day of the
Week, Day, or Month
â Repeat Mode (periodic interrupts)
⢠Oscillator Compensation on Chip
â Internal Feedback Resistor and Compensation
Capacitors
â 64 Position Digitally Controlled Trim Capacitor
â 6 Digital Frequency Adjustment Settings to
±30ppm
⢠CPU Supervisor Functions
â Power-On Reset, Low Voltage Sense
â Watchdog Timer (SW Selectable: 0.25s, 0.75s,
1.75s, off)
⢠Battery Switch or Super Cap Input
⢠512 x 8 Bits of EEPROM
â 64-Byte Page Write Mode
â 8 Modes of Block Lock⢠Protection
â Single Byte Write Capability
⢠High Reliability
â Data Retention: 100 Years
â Endurance: 100,000 Cycles Per Byte
⢠2-Wire⢠Interface Interoperable with I2C*
â 400kHz Data Transfer Rate
⢠Frequency Output (SW Selectable: Off, 1Hz,
4096Hz, or 32.768kHz)
⢠Low Power CMOS
â 1.25µA Operating Current (Typical)
⢠Small Package Options
â 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
X1
32.768kHz
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)
4K
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.
Copyright Intersil Americas Inc. 2005, 2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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