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Xicor
Xicor


X1288

2-Wire RTC Real Time Clock/Calendar/CPU Supervisor with EEPROM



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X1288 pdf
Preliminary Information
New Features
Repetitive Alarms &
Temperature Compensation
2-WireRTC Real Time Clock/Calendar/CPU Supervisor with EEPROM
X1288
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 setting to ±30ppm
• CPU Supervisor Functions
— Power On Reset, Low Voltage Sense
— Watchdog Timer (SW Selectable: 0.25s, 0.75s,
1.75s, off)
• 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
— 16-Lead 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
RESET
Control
Decode
Logic
8
OSC
Compensation
Oscillator
Frequency 1Hz
Divider
Timer
Calendar
Logic
Control/
Registers
(EEPROM)
Status
Registers
(SRAM)
Alarm
Watchdog
Timer
Low Voltage
Reset
Time
Keeping
Registers
(SRAM)
Compare
Alarm Regs
(EEPROM)
256K
EEPROM
ARRAY
Battery
Switch
Circuitry
VCC
VBACK
*I2C is a Trademark of Philips.
REV 1.1.30 3/24/04
www.xicor.com
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X1288 pdf
Preliminary Information
PIN DESCRIPTIONS
X1288
X1
X2
NC
NC
NC
NC
RESET
VSS
16-pin SOIC
1 16
2 15
3 14
4 13
5 12
6 11
7 10
89
VCC
VBACK
PHZ/IRQ
NC
NC
NC
SCL
SDA
14-pin TSSOP
X1
X2
NC
NC
NC
RESET
VSS
1
2
3
4
5
6
7
14
13
12
11
10
9
8
VCC
VBACK
PHZ/IRQ
NC
NC
SCL
SDA
NC = No internal connection
ORDERING INFORMATION
VCC Range
4.5–5.5V
VTRIP Range
4.63V±112mV
Package
16L SOIC
14L TSSOP
4.5–5.5V
4.38V±112mV 16L SOIC
14L TSSOP
2.7–5.5V
2.85V±100mV 16L SOIC
14L TSSOP
2.7–5.5V
2.65V±100mV 16L SOIC
14L TSSOP
Operating
Temperature Range
0–70°C
-40–85°C
0–70°C
-40–85°C
0–70°C
-40–85°C
0–70°C
-40–85°C
0–70°C
-40–85°C
0–70°C
-40–85°C
0–70°C
-40–85°C
0–70°C
-40–85°C
Part Number
X1288S16-4.5A
X1288S16I-4.5A
X1288V14-4.5A
X1288V14I-4.5A
X1288S16
X1288S16I
X1288V14
X1288V14I
X1288S16-2.7A
X1288S16I-2.7A
X1288V14-2.7A
X1288V14I-2.7A
X1288S16-2.7
X1288S16I-2.7
X1288V14-2.7
X1288V14I-2.7
REV 1.1.30 3/24/04
www.xicor.com
2 of 31



Part Number X1288
Description 2-Wire RTC Real Time Clock/Calendar/CPU Supervisor with EEPROM
Maker Xicor - Xicor
Total Page 31 Pages
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