1
®
FN8101.1
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.
X1286
2-Wire™ RTC, 256k (32k x 8)
Intersil 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 settings to
±30ppm
• Battery Switch or Super Cap Input
• 32K x 8 Bits of EEPROM
— 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
• 2-Wire™ Interface interoperable with I
2
C*
— 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
— 8 Ld EIAJ SOIC and 14 Ld TSSOP
• Repetitive Alarms
• Temperature Compensation
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
X2
Oscillator
Frequency
Timer
Logic
Divider
Calendar
8
Control/
Registers
1Hz
Time
Keeping
Registers
Alarm Regs
Compare
Mask
Control
Decode
Logic
Alarm
(EEPROM)
(EEPROM)
SCL
SDA
Serial
Interface
Decoder
256K
EEPROM
ARRAY
Registers
Status
(SRAM)
Select
PHZ/IRQ
V
CC
V
BACK
32.768kHz
(SRAM)
Battery
Circuitry
Switch
OSC
Compensation
Data Sheet April 14, 2006
2
FN8101.1
April 14, 2006
PIN DESCRIPTIONS
X1
X2
V
BACK
V
CC
NC
NC
NC
V
SS
1
2
3
4
13
14
12
11
14 LD TSSOP
NC
NC
SCL
NC
PHZ/IRQ
SDA
5
6
7
9
10
8
X1
X2
V
BACK
V
CC
PHZ/IRQ
SCL
SDA
V
SS
1
2
3
4
7
8
6
5
8 LD EIAJ SOIC
Ordering Information
PART NUMBER PART MARKING V
CC
RANGE (V) TEMP. RANGE (°C) PACKAGE PKG. DWG. #
X1286A8* X1286A 2.7 to 5.5 0 to 70 8 Ld EIAJ SOIC
X1286A8I* X1286A I -40 to 85 8 Ld EIAJ SOIC
X1286V14* X1286 V 0 to 70 14 Ld TSSOP (4.4mm) MDP0044
X1286V14Z* (Note) X1286 VZ 0 to 70 14 Ld TSSOP (4.4mm)
(Pb-free)
MDP0044
X1286V14I* X1286 VI -40 to 85 14 Ld TSSOP (4.4mm) MDP0044
X1286V14IZ* (Note) X1286 VIZ -40 to 85 14 Ld TSSOP (4.4mm)
(Pb-free)
MDP0044
*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.
X1286