ISL1221 Datasheet, PDF (1/24 Pages) Intersil Corporation – Low Power RTC with Battery Backed

ISL1221
®
Real Time Clock/Calendar with Event Detection and Frequency Output
Data Sheet
July 15, 2010
FN6316.1
Low Power RTC with Battery Backed
SRAM and Event Detection
The ISL1221 device is a low power real time clock with
Event Detect and Time Stamp function, timing and crystal
compensation, clock/calendar, power fail indicator, periodic
or polled alarm, intelligent battery backup switching with
separate F_OUT output and 2 Bytes of battery-backed user
SRAM.
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
V_DD
MARKING RANGE
TEMP
RANGE
(°C)
PACKAGE
(Pb-Free)
ISL1221IUZ 1221Z
2.7V to 5.5V -40 to +85 10 Ld MSOP
ISL1221IUZ-T* 1221Z
2.7V to 5.5V -40 to +85 10 Ld MSOP
Tape and Reel
*Please refer to TB347 for details on reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-free material sets, molding compounds/die attach materials,
and 100% matte tin plate plus anneal (e3 termination finish, which is
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
ISL1221
(10 LD MSOP)
TOP VIEW
X1 ₁
X2 ₂
V_{BAT 3}
GND ₄
EVIN ₅
10 ^VDD
9 ^IRQ/EVDET
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
• Security and Event Functions
- Tamper detection with Time Stamp in Normal and
Battery Backed modes
- Event Detection During Battery Backed or Normal
Modes
- Selectable Event Input Sampling Rates Allows Low
Power Operation
- Selectable Glitch Filter on Event Input Monitor
• Separate F_OUT pin with 15 Selectable Frequencies
• Single Alarm
- 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
• 2 Bytes Battery-Backed User SRAM
• I²C Interface
- 400kHz Data Transfer Rate
• 400nA Battery Supply Current
• Small Package
- 10 Ld MSOP
• Pb-Free (RoHS Compliant)
Applications
• Utility Meters
• Set Top Box/Modem
• POS Equipment
• Network Routers, Hubs, Switches, Bridges
• Cellular Infrastructure Equipment
• Fixed Broadband Wireless Equipment
• Test Meters/Fixtures
• Vending Machine Management
• Security and Anti Tampering Applications
- Panel/Enclosure Status
- Warranty Reporting
- Time Stamping Applications
- Patrol/Security Check (Fire or Light Equipment)
- Automotive Applications
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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