ISL12024 Intersil Corporation, ISL12024 Datasheet - Page 2

• Manufacturer Part Number: ISL12024
• Description: Real-Time Clock/Calendar
• Manufacturer: Intersil Corporation

Block Diagram
Pin Descriptions
SOIC
IRQ/F
PIN NUMBER
1
2
3
4
5
6
7
8
OUT
SCL
SDA
32.768kHz
TSSOP
INTERFACE
DECODER
3
4
5
6
7
8
1
2
SERIAL
SELECT
IRQ/F
SYMBOL
X1
X2
V
GND
SDA
SCL
V
X1
X2
BAT
DD
CONTROL
DECODE
8
OUT
2
LOGIC
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. (See “Application Section”
on page 20)
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. (See “Application Section” on page 20)
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 control register. This output is an open drain configuration.
Ground.
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.
The Serial Clock (SCL) input is used to clock all serial data into and out of the device. The input buffer on
this pin is always active (not gated).
This input provides a backup supply voltage to the device. V
that the V
Power Supply.
REGISTERS
CONTROL/
(EEPROM)
DD
OSCILLATOR
COMPENSATION
supply fails. This pin should be tied to ground if not used.
OSC
ISL12024
FREQUENCY
REGISTERS
DIVIDER
STATUS
(SRAM)
1Hz
DESCRIPTION
CALENDAR
ALARM
TIMER
LOGIC
ALARM REGS
BAT
COMPARE
REGISTERS
EEPROM
(EEPROM)
ARRAY
KEEPING
(SRAM)
TIME
4k
supplies power to the device in the event
CIRCUITRY
BATTERY
SWITCH
October 18, 2006
V
V
FN6370.1
DD
BAT