ISL12022
2
FN6659.3
November 22, 2011
Block Diagram
Pin Configuration
ISL12022
(8 LD SOIC)
TOP VIEW
I2C
INTERFACE
CONTROL
LOGIC
ALARM
FREQUENCY
OUT
RTC
DIVIDER
SDA
BUFFER
CRYSTAL
OSCILLATOR
POR
SWITCH
SCL
BUFFER
SDA
SCL
X1
X2
VDD
VBAT
IRQ/FOUT
INTERNAL
SUPPLY
VTRIP
SECONDS
MINUTES
HOURS
DAY OF WEEK
DATE
MONTH
YEAR
USER
SRAM
CONTROL
REGISTERS
GND
REGISTERS
TEMPERATURE
SENSOR
FREQUENCY
CONTROL
VDD
IRQ/FOUT
SCL
SDA
X1
X2
VBAT
1
2
3
4
8
7
6
5
GND
Pin Descriptions
PIN # SYMBOL
DESCRIPTION
1X1
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.
2X2
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.
3VBAT
Backup Supply. 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.
4GND
Ground.
5SDA
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.
6SCL
Serial Clock. The SCL input is used to clock all serial
data into and out of the device.
7
IRQ/FOUT 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.
8VDD
Power Supply.
Ordering Information
PART NUMBER
PART
MARKING
VDD 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
NOTES:
1. Add “-T*” suffix for tape and reel. Please refer to
TB347 for details on reel specifications.
2. 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.
3. For Moisture Sensitivity Level (MSL), please see device information page for
ISL12022. For more information on MSL please see tech brief
TB363.