ISL1208 Intersil Corporation, ISL1208 Datasheet - Page 2

• Manufacturer Part Number: ISL1208
• Manufacturer: Intersil Corporation

Block Diagram
Pin Descriptions
NUMBER
PIN
1
2
3
4
5
6
7
8
V
V
SDA
SCL
BAT
IRQ/F
DD
SYMBOL
X1
X2
V
GND
SDA
SCL
V
X1
X2
BAT
DD
OUT
V
TRIP
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.
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.
This input provides a backup supply voltage to the device. V
V
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.
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 configuration register.
Power supply.
BUFFER
BUFFER
DD
SDA
SCL
2
OSCILLATOR
supply fails. This pin should be tied to ground if not used.
CRYSTAL
POR
INTERNAL
SWITCH
SUPPLY
INTERFACE
I
2
C
FREQUENCY
DIVIDER
RTC
OUT
ISL1208
CONTROL
ALARM
DESCRIPTION
LOGIC
RTC
BAT
supplies power to the device in the event that the
Day of Week
REGISTERS
CONTROL
Seconds
Minutes
Hours
Month
SRAM
USER
Date
Year
F
IRQ/
OUT
FN8085.2