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| ISL12021 Datasheet, PDF (2/24 Pages) Intersil Corporation – Real Time Clock with On Chip Temp Compensation ±5ppm | |||
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ISL12021
Ordering Information
PART NUMBER
(Note)
Coming Soon
ISL12021IVZ*
PART MARKING
12021 IVZ
VDD RANGE
2.7V to 5.5V
TEMP RANGE
(°C)
-40 to +85
PACKAGE
(Pb-free)
14 Ld TSSOP
PKG DWG #
M14.173
ISL12021CVZ*
12021 CVZ
2.7V to 5.5V
-20 to +70
14 Ld TSSOP
M14.173
*Add â-Tâ suffix for 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.
Block Diagram
SDA
SCL
SDA
BUFFER
SCL
BUFFER
I2C
INTERFACE
CONTROL
LOGIC
REGISTERS
X1
X2
VDD
VTRIP
VBAT
GND
CRYSTAL
OSCILLATOR
RTC
DIVIDER
POR
FREQUENCY
OUT
SWITCH
INTERNAL
SUPPLY
ALARM
BR. OUT. ALM.
SECONDS
MINUTES
HOURS
DAY OF WEEK
DATE
MONTH
YEAR
CONTROL
REGISTERS
USER
SRAM
IRQ
FOUT
LVRST
Pin Descriptions
PIN
NUMBER
1
2
3
4
5
6
7
8
9
10
11
12
13
14
SYMBOL
N/C
X1
X2
VBAT
GND
LVRST
N/C
N/C
FOUT
SDA
SCL
IRQ
VDD
N/C
DESCRIPTION
No connect.
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.
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. X2 should be left open when X1 is driven from external source.
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.
Ground.
Low Voltage Reset pin for VCC Brown Out Mode. Open drain Configuration
No connect.
No Connect
FOUT Frequency Output, Frequency selectable through Control Register
Serial Data (SDA). 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 ORâed with other open drain or open collector outputs.
Serial Clock (SCL). The SCL input is used to clock all serial data into and out of the device.
Interrupt Output IRQ. Interrupt pin. Open drain configuration.
VDD. Power supply.
No connect.
2
FN6451.0
March 30, 2007
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