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Intersil Electronic Components Datasheet



X1226

Real Time Clock/Calendar



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®
Data Sheet
X1226
4K (512 x 8), 2-Wire™ RTC
May 8, 2006
FN8098.3
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
www.DataSheet4U.com — 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
32.768kHz
X1
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. 2005-2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.



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X1226 pdf
X1226
Ordering Information
PART NUMBER
X1226S8*
X1226S8Z* (Note)
X1226S8I*
X1226S8IZ* (Note)
X1226V8*
X1226V8Z* (Note)
PART MARKING
X1226
X1226Z
X1226I
X1226ZI
1226
1226Z
VDD (V)
2.7 to 5.5
TEMP
RANGE (°C)
0 to 70
0 to 70
-40 to 85
-40 to 85
0 to 70
0 to 70
PACKAGE
8 Ld SOIC (150 mil)
8 Ld SOIC (150 mil) (Pb-free)
8 Ld SOIC (150 mil)
8 Ld SOIC (150 mil) (Pb-free)
8 Ld TSSOP (4.4mm)
8 Ld TSSOP (4.4mm) (Pb-free)
PKG. DWG. #
MDP0027
MDP0027
MDP0027
MDP0027
M8.173
M8.173
X1226V8I*
1226I
-40 to 85 8 Ld TSSOP (4.4mm)
M8.173
X1226V8IZ* (Note)
1226IZ
-40 to 85 8 Ld TSSOP (4.4mm) (Pb-free)
M8.173
*Add "T1" suffix for tape and reel.
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate
termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
PIN CONFIGURATION
X1
X2
PHZ/IRQ
VSS
8 LD SOIC
18
27
36
45
VCC
VBACK
SCL
SDA
VBACK
VCC
X1
X2
8 LD TSSOP
18
27
36
45
SCL
SDA
VSS
PHZ/IRQ
2 FN8098.3
May 8, 2006



Part Number X1226
Description Real Time Clock/Calendar
Maker Intersil Corporation - Intersil Corporation
Total Page 25 Pages
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