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ISL1220 データシート(PDF) 2 Page - Intersil Corporation

部品番号 ISL1220
部品情報  I2C짰 Real Time Clock/Calendar with Frequency Output
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メーカー  INTERSIL [Intersil Corporation]
ホームページ  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL1220 データシート(HTML) 2 Page - Intersil Corporation

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2
FN6315.0
June 22, 2006
Block Diagram
I2C
INTERFACE
CONTROL
LOGIC
ALARM
FREQUENCY
OUT
RTC
DIVIDER
SDA
BUFFER
CRYSTAL
OSCILLATOR
POR
SWITCH
SCL
BUFFER
SDA
SCL
X1
X2
VDD
VBAT
INTERNAL
SUPPLY
VTRIP
SECONDS
MINUTES
HOURS
DAY OF WEEK
DATE
MONTH
YEAR
USER
SRAM
CONTROL
REGISTERS
FOUT
IRQ
GND
Pin Descriptions
PIN
NUMBER
SYMBOL
DESCRIPTION
1
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.
2
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.
3VBAT
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.
4
GND
Ground.
5
NC
No Connection
6FOUT
Frequency Output (FOUT). Open drain output, Programmable to be active/disabled in battery back up mode.
7
SDA
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.
8
SCL
The Serial Clock (SCL) input is used to clock all serial data into and out of the device.
9IRQ
Interrupt Output. Open drain output, active low.
10
VDD
Power supply.
ISL1220


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