ISL1219 Intersil Corporation, ISL1219 Datasheet - Page 2

• Manufacturer Part Number: ISL1219
• Description: Real Time Clock/Calendar
• Manufacturer: Intersil Corporation

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Block Diagram
Pin Descriptions
NUMBER
PIN
10
1
2
3
4
5
6
7
8
9
V
GND
EVIN
SDA
V
SCL
BAT
IRQ/F
DD
SYMBOL
X1
X2
EVDET
V
EVIN
GND
SDA
SCL
V
X1
X2
BAT
DD
OUT
V
TRIP
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.
V
the V
Ground.
Event Input (EVIN). The EVIN is an input pin that is used to detect an externally monitored event. When a high signal
is present at the EVIN pin an “event” is detected.
Event Detect Output, active when EVIN is triggered. Open drain output.
Serial Data (SDA). 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.
Serial Clock (SCL). The SCL input is used to clock all serial data into and out of the device.
Interrupt Output IRQ, /Frequency Output F
output pin. The function is set via the configuration register.
V
BUFFER
BUFFER
BAT.
DD.
SDA
SCL
2
OSCILLATOR
DD
Power supply.
This input provides a backup supply voltage to the device. V
CRYSTAL
supply fails. This pin should be tied to ground if not used.
POR
INTERNAL
SWITCH
SUPPLY
INTERFACE
I
2
C
FREQUENCY
DIVIDER
OUT
RTC
ISL1219
OUT.
CONTROL
ALARM
DESCRIPTION
Multi-functional pin that can be used as interrupt or frequency
LOGIC
BAT
supplies power to the device in the event that
DAY OF WEEK
REGISTERS
SECONDS
CONTROL
MINUTES
MONTH
HOURS
SRAM
YEAR
USER
DATE
EVDET
F
IRQ/
OUT
August 14, 2006
FN6314.1