参数资料
型号: RV5C387A-F
厂商: RICOH COMPANY LTD
元件分类: 时钟/数据恢复及定时提取
英文描述: 0 TIMER(S), REAL TIME CLOCK, PDSO10
封装: 4 X 2.90 MM, 1.20 MM HEIGHT, SSOP-10
文件页数: 38/49页
文件大小: 330K
代理商: RV5C387A-F
43
RV5C387A
6.2 Connection of INTRA, INTRB or INTRC Pin
The INTRA, INTRB or INTRC pin follows 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.
6.3 Connection of 32KOUT Pin
The 32KOUT pin follows the Nch. open drain output and contains no protective diode on the power supply side. As
such, it can be connected to a device with a supply voltage of up to 5.5 volts regardless of supply voltage, provided
that such connection involves considerations for the supply current requirements of a pull-up resistor, which can be
roughly calculated by the following equation:
I=0.5
×(VDD or VCC)/Rp
System power supply
RV5C387A
32.768kHz
A
B
OSCIN
OSCOUT
V
DD
V
SS
INTRA or INTRB or INTRC
Backup power supply
*
1
OSCIN
OSCOUT
VDD
VSS
32KOUT
System power supply (VCC)
A
B
Backup battery
32.768kHz
Rp
(VDD)
RV5C387A
*
1
*1) Depending on whether the INTRA, INTRB or INTRC pin is 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.
*1) Depending on whether the 32KOUT pin is 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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