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ISL12028IB27Z Datenblatt(PDF) 1 Page - Intersil Corporation

Teilenummer ISL12028IB27Z
Bauteilbeschribung  Real Time Clock/Calendar with I2C Bus??and EEPROM
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Hersteller  INTERSIL [Intersil Corporation]
Direct Link  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL12028IB27Z Datenblatt(HTML) 1 Page - Intersil Corporation

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1
®
ISL12028, ISL12028A
Real Time Clock/Calendar with I2C Bus™
and EEPROM
The ISL12028 device is a low power real time clock with
clock/calendar, power-fail indicator, clock output and crystal
compensation, two periodic or polled alarms (CMOS output),
intelligent battery backup switching, CPU Supervisor,
integrated 512x8-bit EEPROM configured in 16 bytes per
page.
The oscillator uses an external, low-cost 32.768kHz crystal.
The real-time clock tracks time with separate registers for
hours, minutes and seconds. The device has calendar
registers for date, month, year and day of the week. The
calendar is accurate through 2099, with automatic leap year
correction.
The ISL12028 and ISL12028A Power Control Settings are
different. The ISL12028 uses the Legacy Mode Setting, and
the ISL12028A uses the Standard Mode Setting.
Applications that have VBAT > VDD will require only the
ISL12028A. Please refer to “Power Control Operation” on
page 14 for more details. Also, please refer to “I2C
Communications During Battery Backup and LVR Operation”
on page 25 for important details.
Pinout
ISL12028, ISL12028A
(14 LD TSSOP, SOIC)
TOP VIEW
Features
• Real Time Clock/Calendar
- Tracks time in Hours, Minutes and Seconds
- Day of the Week, Day, Month and Year
- 3 Selectable Frequency Outputs
• Two Non-Volatile Alarms
- Settable on the Second, Minute, Hour, Day of the Week,
Day, or Month
- Repeat Mode (Periodic Interrupts)
• Automatic Backup to Battery or SuperCap
- Power Failure Detection
- 800nA Battery Supply Current
• On-Chip Oscillator Compensation
- Internal Feedback Resistor and Compensation
Capacitors
- 64 Position Digitally Controlled Trim Capacitor
- 6 Digital Frequency Adjustment Settings to ±30ppm
• 512x8 Bits of EEPROM:
- 16-Byte Page Write Mode (32 total pages)
- 8 Modes of BlockLock™ Protection
- Single Byte Write Capability
- Data Retention: 50 years
- Endurance: >2,000,000 Cycles Per Byte
• CPU Supervisor Functions:
- Power On Reset, Low Voltage Sense
- Watchdog Timer (0.25s, 0.75s and 1.75s)
•I2C Interface
- 400kHz Data Transfer Rate
• 14 Ld SOIC and 14 Ld TSSOP Packages
• Pb-Free (RoHS Compliant)
Applications
• Utility Meters
• HVAC Equipment
• Audio/Video Components
• 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
NC = No internal connection
NC
NC
X1
X2
1
2
3
4
13
14
12
11
5
6
7
10
9
8
RESET
GND
VDD
VBAT
IRQ/FOUT
NC
SCL
NC
SDA
NC
Data Sheet
FN8233.8
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.
I2C Bus™ is a trademark owned by NXP Semiconductors Netherlands, B.V.
BlockLock™ is a trademark of Intersil Corporation or one of its subsidiaries. Copyright Intersil Americas Inc. 2005, 2006, 2008, 2010.
All Rights Reserved. All other trademarks mentioned are the property of their respective owners.
August 9, 2010


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