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R2023T-E2-F Datasheet(PDF) 3 Page - RICOH electronics devices division

Part # R2023T-E2-F
Description  2-wire Serial Interface Real Time Clock IC
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Manufacturer  RICOH [RICOH electronics devices division]
Direct Link  http://www.ricoh.com
Logo RICOH - RICOH electronics devices division

R2023T-E2-F Datasheet(HTML) 3 Page - RICOH electronics devices division

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R2023x
3
* R2023K (FFP12) is the discontinued product as of February, 2016.
PIN DESCRIPTION
Symbol
Item
Description
SCL
Serial Clock
Line
The SCL pin is used to input clock pulses synchronizing the input and
output of data to and from the SDA pin.
Allows a maximum input
voltage of 5.5v regardless of supply voltage.
SDA
Serial Data Line
The SDA pin is used to input and output data intended for writing and
reading in synchronization with the SCL pin.
Allows a maximum input
voltage of 5.5v regardless of supply voltage.
Nch. open drain output.
INTRA
Interrupt
Output A
The INTRA pin is used to output alarm interrupt (Alarm_D) and periodic
interrupt signals to the CPU.
Disabled at power-on from 0V. N-channel
open drain output.
Allows a maximum pull-up voltage of 5.5v
regardless of supply voltage.
INTRB
Interrupt
Output B
The INTRB pin is used to output alarm interrupt (Alarm_W) to the CPU.
Disabled at power-on from 0V. N-channel open drain output.
Allows a
maximum pull-up voltage of 5.5v regardless of supply voltage.
32KOUT
32kHz Clock
Output
The 32KOUT pin is used to output 32.768-kHz clock pulses.
The pin is
CMOS push-pull output.
The output is disabled and held “L” when
CLKC pin is set to “L” or open, or certain register setting.
This pin is
enabled at power-on from 0v.
CLKC
Clock Control
The CLKC pin is used to control output of the 32KOUT pin.
The clock
output is disabled and held “L” when this pin is set to “L” or open.
Incorporated pull down register.
OSCIN
OSCOUT
Oscillation
Circuit
Input / Output
The OSCIN and OSCOUT pins are used to connect the 32.768-kHz
crystal oscillator (with all other oscillation circuit components built into
the R2023x).
VDD
VSS
Positive/Negati
ve Power
Supply Input
The VDD pin is connected to the power supply.
The VSS pin is
grounded.
(VSS)
Please connect to ground line, or do not connect any lines.
N.C.
No Connection


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