ISL12026 Intersil Corporation, ISL12026 Datasheet - Page 2

• Manufacturer Part Number: ISL12026
• Manufacturer: Intersil Corporation

Block Diagram
Pin Descriptions
IRQ/F
SOIC
PIN NUMBER
1
2
3
4
5
6
7
8
OUT
SCL
SDA
32.768kHz
TSSOP
INTERFACE
DECODER
SERIAL
3
4
5
6
7
8
1
2
SELECT
X1
X2
IRQ/F
SYMBOL
V
GND
CONTROL
SDA
SCL
V
DECODE
8
X1
X2
BAT
LOGIC
DD
OUT
2
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)
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)
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)
OSCILLATOR
DD
COMPENSATION
supply fails. This pin should be tied to ground if not used.
OSC
FREQUENCY
DIVIDER
REGISTERS
ISL12026
STATUS
(SRAM)
1Hz
CALENDAR
ALARM
DESCRIPTION
TIMER
LOGIC
ALARM REGS
COMPARE
REGISTERS
EEPROM
(EEPROM)
ARRAY
KEEPING
BAT
(SRAM)
TIME
4K
supplies power to the device in the event
CIRCUITRY
BATTERY
SWITCH
April 13, 2006
V
V
DD
BAT
FN8231.3