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ISL12022MIBZ-T Datenblatt(PDF) 2 Page - Intersil Corporation

Teilenummer ISL12022MIBZ-T
Bauteilbeschribung  Low Power RTC with Battery Backed SRAM,Integrated 짹5ppm Temperature Compensation and Auto Daylight Saving
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Hersteller  INTERSIL [Intersil Corporation]
Direct Link  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL12022MIBZ-T Datenblatt(HTML) 2 Page - Intersil Corporation

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2
FN6668.7
June 4, 2010
Block Diagram
Pin Configuration
ISL12022M
(20 LD SOIC)
TOP VIEW
I2C
INTERFACE
CONTROL
LOGIC
ALARM
FREQUENCY
OUT
RTC
DIVIDER
SDA
BUFFER
CRYSTAL
OSCILLATOR
POR
SWITCH
SCL
BUFFER
SDA
SCL
VDD
VBAT
INTERNAL
SUPPLY
VTRIP
SECONDS
MINUTES
HOURS
DAY OF WEEK
DATE
MONTH
YEAR
USER
SRAM
CONTROL
REGISTERS
GND
REGISTERS
TEMPERATURE
SENSOR
FREQUENCY
CONTROL
IRQ/FOUT
+
-
NC
NC
NC
GND
NC
NC
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
NC
NC
GND
VDD
NC
NC
GND
VBAT
NC
NC
NC
IRQ/FOUT
SCL
SDA
Pin Descriptions
PIN
NUMBER
SYMBOL
DESCRIPTION
1, 2, 3, 4, 5,
9, 10, 16,
17, 18, 19,
20
NC
No Connection. Do not connect to a signal or supply voltage.
7VBAT
Backup Supply. 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 can be connected to a battery, a
supercapacitor or tied to ground if not used. See the Battery Monitor parameter in the “DC Operating
Characteristics-RTC” table on page 4. This pin should be tied to ground if not used.
11
SDA
Serial Data. SDA is a bi-directional pin used to transfer data into and out of the device. It has an
open drain output and may be OR’ed with other open drain or open collector outputs. The input buffer
is always active (not gated) in normal mode.
An open drain output requires the use of a pull-up resistor. The output circuitry controls the fall time
of the output signal with the use of a slope controlled pull-down. The circuit is designed for 400kHz
I2C interface speeds. It is disabled when the backup power supply on the VBAT pin is activated.
ISL12022M


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