DATASHEET
ISL1220
Low Power RTC with 8 Bytes of Battery Backed SRAM and Separate FOUT
FN6315
Rev 1.00
August 7, 2015
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.
Ordering Information
PART
NUMBER
(Note)
PART
VDD
MARKING RANGE
TEMP.
RANGE
(°C)
PACKAGE
(Pb-Free)
ISL1220IUZ-T 1220Z
2.7V to 5.5V -40 to +85 10 Ld MSOP
Tape and Reel
ISL1220EVALZ Evaluation Board
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.
Pinout
ISL1220
(10 LD MSOP)
TOP VIEW
X1 1
X2 2
VBAT 3
GND 4
NC 5
10 VDD
9 IRQ
8 SCL
7 SDA
6 FOUT
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
FN6315 Rev 1.00
August 7, 2015
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