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Renesas Electronics Components Datasheet

ISL1218 Datasheet

Low Power RTC

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ISL1218
Low Power RTC with Battery Backed SRAM
The ISL1218 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 and 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
VDD
MARKING RANGE
TEMP.
RANGE
(°C)
PACKAGE
(Pb-Free)
ISL1218IBZ 1218IBZ
2.7V to -40 to +85 8 Ld SOIC
5.5V
ISL1218IBZ-T 1218IBZ
2.7V to -40 to +85 8 Ld SOIC
5.5V
Tape and Reel
ISL1218IUZ 1218Z
2.7V to -40 to +85 8 Ld MSOP
5.5V
ISL1218IUZ-T 1218Z
2.7V to -40 to +85 8 Ld MSOP
5.5V
Tape and Reel
NOTE: Intersil Pb-free plus anneal 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
ISL1218
(8 LD MSOP, SOIC)
TOP VIEW
X1
X2
VBAT
GND
1
2
3
4
8 VDD
7 IRQ/FOUT
6 SCL
5 SDA
DATASHEET
FN6313
Rev.0.00
Jun 22, 2006
Features
• Real Time Clock/Calendar
- Tracks Time in Hours, Minutes, and Seconds
- Day of the Week, Day, Month, and Year
• 15 Selectable Frequency Outputs
• 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
• 8 Bytes Battery-Backed User SRAM
• I2C Interface
- 400kHz Data Transfer Rate
• 400nA Battery Supply Current
• Same Pin Out as ST M41Txx and Maxim DS13xx Devices
• Small Package Options
- 8 Ld MSOP and SOIC Packages
• 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
FN6313 Rev.0.00
Jun 22, 2006
Page 1 of 21


Renesas Electronics Components Datasheet

ISL1218 Datasheet

Low Power RTC

No Preview Available !

ISL1218
Block Diagram
SDA
SCL
SDA
BUFFER
SCL
BUFFER
I2C
INTERFACE
RTC
CONTROL
LOGIC
X1
X2
VDD
VTRIP
VBAT
CRYSTAL
OSCILLATOR
RTC
DIVIDER
POR
FREQUENCY
OUT
SWITCH
INTERNAL
SUPPLY
ALARM
SECONDS
MINUTES
HOURS
DAY OF WEEK
DATE
MONTH
YEAR
CONTROL
REGISTERS
USER
SRAM
IRQ/
FOUT
Pin Descriptions
PIN
NUMBER
SYMBOL
DESCRIPTION
1 X1 The X1 pin is the input of an inverting amplifier and is intended to be connected to one pin of an external 32.768kHz
quartz crystal. X1 can also be driven directly from a 32.768kHz source.
2 X2 The X2 pin is the output of an inverting amplifier and is intended to be connected to one pin of an external 32.768kHz
quartz crystal.
3
VBAT
This input provides a backup supply voltage to the device. VBAT supplies power to the device in the event that the
VDD supply fails. This pin should be tied to ground if not used.
4
GND
Ground.
5
SDA
Serial Data (SDA) is a bidirectional pin used to transfer serial data into and out of the device. It has an open drain
output and may be wire OR’ed with other open drain or open collector outputs.
6 SCL The Serial Clock (SCL) input is used to clock all serial data into and out of the device.
7 IRQ/FOUT Interrupt Output/Frequency Output is a multi-functional pin that can be used as interrupt or frequency output pin. The
function is set via the configuration register.
8
VDD
Power supply.
FN6313 Rev.0.00
Jun 22, 2006
Page 2 of 21


Part Number ISL1218
Description Low Power RTC
Maker Renesas
Total Page 21 Pages
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