ISL12022 Datasheet, PDF (2/28 Pages) Intersil Corporation – Real Time Clock with On Chip ±5ppm Temp Compensation

ISL12022
Ordering Information
PART NUMBER
(Note)
PART
MARKING
V_DD RANGE
(V)
TEMP RANGE
(°C)
PACKAGE
(Pb-free)
PKG.
DWG. #
ISL12022IBZ*
12022 IBZ
2.7 to 5.5
-40 to +85
8 Ld SOIC
M8.15
*Add “-T” suffix for 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.
Block Diagram
SDA
SCL
SDA
BUFFER
SCL
BUFFER
I²C
INTERFACE
CONTROL
LOGIC
REGISTERS
X1
X2
V_DD
V_TRIP
V_BAT
GND
CRYSTAL
OSCILLATOR
RTC
DIVIDER
POR
FREQUENCY
OUT
SWITCH
INTERNAL
SUPPLY
TEMPERATURE
SENSOR
FREQUENCY
CONTROL
ALARM
SECONDS
MINUTES
HOURS
DAY OF WEEK
DATE
MONTH
YEAR
CONTROL
REGISTERS
USER
SRAM
IRQ/F_OUT
Pin Descriptions
PIN
NUMBER
1
2
3
4
5
SYMBOL
X1
X2
V_BAT
GND
SDA
DESCRIPTION
Crystal Input. 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.
Crystal Output. 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. X2 should be left open when X1 is driven from external source.
Backup Supply. This input provides a backup supply voltage to the device. V_BAT supplies power to the device in the
event that the V_DD supply fails. This pin should be tied to ground if not used.
Ground.
Serial Data. SDA is a bi-directional 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
Serial Clock. The SCL input is used to clock all serial data into and out of the device.
7
IRQ/F_OUT Interrupt Output/Frequency Output. Multi-functional pin that can be used as interrupt or frequency output pin. The
function is set via the configuration register. It is an open-drain output.
8
V_DD
Power Supply.
2
FN6659.2
June 23, 2009