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X1226S8ZT1 View Datasheet(PDF) - Intersil

Part Name
Description
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X1226S8ZT1
Intersil
Intersil Intersil
X1226S8ZT1 Datasheet PDF : 25 Pages
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®
Data Sheet
X1226
4K (512 x 8), 2-WireRTC
September 15, 2005
FN8098.2
Real Time Clock/Calendar with EEPROM
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 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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