ISL12023 Datasheet, PDF (2/28 Pages) Intersil Corporation – Low Power RTC with Battery-Backed SRAM and Embedded Temp Compensation ±5ppm with Auto Daylight Saving

ISL12023
Ordering Information
PART NUMBER
(Note)
PART
MARKING
V_DD RANGE
(V)
TEMP RANGE
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL12023IVZ*
12023 IVZ
2.7 to 5.5
-40 to +85
14 Ld TSSOP
M14.173
*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
BROWNOUT
ALARM
SECONDS
MINUTES
HOURS
DAY OF WEEK
DATE
MONTH
YEAR
CONTROL
REGISTERS
USER
SRAM
IRQ
F_OUT
LVRST
Pin Descriptions
PIN
NUMBER
1, 7, 8, 14
2
3
4
5
6
9
10
11
12
13
SYMBOL
NC
X1
X2
V_BAT
GND
LVRST
F_OUT
SDA
SCL
IRQ
V_DD
DESCRIPTION
No connect. Do not connect.
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.
Low Voltage Reset pin for VCC Brownout Mode. Open drain configuration
Frequency Output. Frequency selectable through Control Register. Open drain configuration.
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.
Serial Clock. The SCL input is used to clock all serial data into and out of the device.
Interrupt Output. Provides active low interrupt signal. Open drain configuration.
Power Supply.
2
FN6682.2
June 24, 2009