參數(shù)資料
型號(hào)： R2025S
廠商： RICOH COMPANY LTD
元件分類： XO, clock
英文描述： High precision I2C-Bus Real-Time Clock Module
中文描述： REAL TIME CLOCK, PDSO14
封裝： 10.10 X 7.40 MM, 3.10 MM HEIGHT, SOP-14
文件頁(yè)數(shù)： 39/47頁(yè)
文件大小： 524K
代理商： R2025S
R2025S/D
39
Connection of /INTRA and /INTRB Pin
The /INTRA and /INTRB pins follow the N-channel open drain output logic and contains no protective diode on the
power supply side. As such, it can be connected to a pull-up resistor of up to 5.5 volts regardless of supply
voltage.
System power supply
VDD
/INTRA or /INTRB
*1)
B
A
Backup power supply
VSS
Connection of 32KOUT Pin
As the 32KOUT pin is CMOS output, the power supply voltage of the R2025S/D and any devices to be connected
to the 32KOUT should be same. When the devices is powered down, the 32KOUT output should be disabled.
When the CLKC pin is connected to the system power supply through the pull-up resistor, the pull-up resistor
should be 0
to 10k
, and the 32KOUT pin should be connect to the host through the resistor (approx. 10k
).
VDD
CLKC
VSS
System power supply
32KOUT
RN5VL
XXC
Back-up power supply
VDD
Host
VSS
Back-up power supply
System power supply
Approx. 10K
32KOUT
0 to10K
CLKC
*1) Depending on whether the /INTRA and
/INTRB pins are to be used during battery
backup, it should be connected to a pull-up
resistor at the following different positions:
(1) Position A in the left diagram when it is not to
be used during battery backup.
(2) Position B in the left diagram when it is to be
used during battery backup.
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