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Intersil Electronic Components Datasheet



X1286

Intersil Real Time Clock/Calendar/CPU Supervisor with EEPROM X1286



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X1286 pdf
New Features
Repetitive Alarms &
Temperature Compensation
2-Wire™ RTC, 256K (32K x 8)
®
Intersil Real Time Clock/Calendar/CPU Supervisor with EEPROM X1286
FEATURES
• Real Time Clock/Calendar
— Tracks time in Hours, Minutes, Seconds and Hun-
dredths 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 I2C*
— 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-Lead EIAJ SOIC and 14-Lead TSSOP
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
32.768kHz
X1
X2
PHZ/IRQ
Select
SCL
SDA
Serial
Interface
Decoder
Control
Decode
Logic
8
OSC
Compensation
Oscillator
Frequency 1Hz
Divider
Timer
Calendar
Logic
Control/
Registers
(EEPROM)
Status
Registers
(SRAM)
Alarm
Time
Keeping
Registers
(SRAM)
Compare
Alarm Regs
(EEPROM)
256K
EEPROM
ARRAY
*I2C is a Trademark of Philips.
REV 1.1 7/8/04
www.intersil.com
Battery
Switch
Circuitry
VCC
VBACK
1 of 26



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X1286 pdf
PIN DESCRIPTIONS
X1286
8-pin EIAJ SOIC
X1
X2
PHZ/IRQ
VSS
1
2
3
4
8
7
6
5
VCC
VBACK
SCL
SDA
14- pin TSSOP
X1
X2
NC
NC
NC
PHZ/IRQ
VSS
1
2
3
4
5
6
7
14 VCC
13 VBACK
12 NC
11 NC
10 NC
9 SCL
8 SDA
ORDERING INFORMATION
VCC Range
2.7–5.5V
Package
8L EIAJ SOIC
14L TSSOP
PART MARK INFORMATION
14-Lead TSSOP
EYWW
XXXXX
1286 = 2.7 to 5.5V, 0 to +70°C
1286I = 2.7 to 5.5V, -40 to +85°C
Operating Temperature Range
0–70°C
-40–85°C
0–70°C
-40–85°C
Part Number
X1286A8
X1286A8I
X1286V14
X1286V14I
8-Lead EIAJ SOIC
X1286
EYWWX
Blank = 2.7 to 5.5V, 0 to +70°C
I = 2.7 to 5.5V, -40 to +85°C
REV 1.1 7/8/04
www.intersil.com
2 of 26



Part Number X1286
Description Intersil Real Time Clock/Calendar/CPU Supervisor with EEPROM X1286
Maker Intersil Corporation - Intersil Corporation
Total Page 26 Pages
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