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X1226 Datasheet, PDF (1/25 Pages) Xicor Inc. – Real Time Clock/Calendar with EEPROM | |||
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Data Sheet
X1226
4K (512 x 8), 2-Wire⢠RTC
September 15, 2005
FN8098.2
Real Time Clock/Calendar with EEPROM
FEATURES
⢠Real Time Clock/Calendar
âTracks time in Hours, Minutes, and Seconds
âDay of the Week, Day, Month, and Year
⢠2 Polled Alarms (Non-volatile)
âSettable on the Second, Minute, Hour, Day of
the Week, Day, or Month
âRepeat Mode (periodic interrupts)
⢠Oscillator Compensation On Chip
âInternal feedback resistor and compensation
capacitors
â64 position Digitally Controlled Trim Capacitor
â6 digital frequency adjustment settings to
±30ppm
⢠Battery Switch or Super Cap Input
⢠512 x 8 Bits of EEPROM
â64-Byte Page Write Mode
â8 modes of Block Lock⢠Protection
âSingle Byte Write Capability
⢠High Reliability
âData Retention: 100 years
âEndurance: 100,000 cycles per byte
⢠2-Wire⢠Interface Interoperable With I2C
â400kHz data transfer rate
⢠Frequency Output (SW Selectable: Off, 1Hz,
4096Hz or 32.768kHz)
⢠Low Power CMOS
â1.25µA Operating Current (Typical)
⢠Small Package Options
â8 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
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.
BLOCK DIAGRAM
OSC
Compensation
X1
32.768kHz
X2
PHZ/IRQ
Select
Oscillator
Frequency 1Hz
Divider
Timer
Calendar
Logic
Time
Keeping
Registers
(SRAM)
Battery
Switch
Circuitry
VCC
VBACK
SCL
SDA
Serial
Interface
Decoder
Control
Decode
Logic
8
Control/
Registers
(EEPROM)
Status
Registers
(SRAM)
Alarm
Compare
Alarm Regs
(EEPROM)
4K
EEPROM
ARRAY
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. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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