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FN6315.0
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. 2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
ISL1220
I2C Real Time Clock/Calendar with Frequency Output
Low Power RTC with 8 Bytes of Battery
Backed SRAM and Separate FOUT
The ISL1220 device is a low power real time clock with
timing and crystal compensation, clock/calendar, power fail
indicator, periodic or polled alarm, intelligent battery backup
switching, battery-backed user SRAM and separate FOUT
and IRQ outputs.
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.
Pinout
ISL1220
(10 LD MSOP)
TOP VIEW
Features
Real Time Clock/Calendar
- Tracks Time in Hours, Minutes, and Seconds
- Day of the Week, Day, Month, and Year
Frequency Output pin
- 15 Selectable Output Frequencies
Single Alarm with Separate Interrupt pin
- Settable to the Second, Minute, Hour, Day of the Week,
Day, or Month
- Single Event or Pulse Interrupt Mode
Automatic Backup to Battery or Super Cap
Power Failure Detection
On-Chip Oscillator Compensation
8 Bytes Battery-Backed User SRAM
I2C Interface
- 400kHz Data Transfer Rate
400nA Battery Supply Current
Small Package Option
- 10 Ld MSOP Package
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
Ordering Information
PART
NUMBER
(Note)
PART
MARKING
VDD
RANGE
TEMP.
RANGE
(°C)
PACKAGE
(Pb-Free)
ISL1220IUZ
1220Z
2.7V to 5.5V -40 to +85 10 Ld MSOP
ISL1220IUZ-T 1220Z
2.7V to 5.5V -40 to +85 10 Ld MSOP
Tape and Reel
NOTE: Intersil Pb-free 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.
1
2
3
4
10
9
8
7
5
6
X1
X2
VBAT
GND
NC
VDD
IRQ
SCL
SDA
FOUT
Data Sheet
June 22, 2006
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