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參數(shù)資料
| 型號： | RS5C321B |
| 廠商： | RICOH COMPANY LTD |
| 元件分類： | XO, clock |
| 英文描述： | ULTRA-COMPACT SERIAL REAL-TIME CLOCK ICs WITH 32.768kHz |
| 中文描述： | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
| 封裝： | 0.65 MM PITCH, SSOP-8 |
| 文件頁數(shù)： | 26/33頁 |
| 文件大小： | 252K |
| 代理商： | RS5C321B |
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RS5C321A/B
22
11. Typical Application
*
1) Connect the capacitance of the oscillation circuit to the VSS pin.
*
2) Mount the high-and low-frequency by-pass capacitors in parallel and very close to the RS5C321.
*
3) Connect the pull-up resistor of the 32KOUT pin to two different positions depending on whether the resistor is in use during battery back-up:
(I)
When not in use during battery back-up.............Position A in the above figure
(II)
When in use during battery back-up...................Position B in the above figure
*
4) When using a “D” circuit in place of “C”, note that forward voltage of diode should be minimized to eliminate applying excess voltage to input pins.
(Take the utmost care on system powering-ON and-OFF).
VCC
VSS
OSCIN
OSCOUT
VDD
VSS
32KOUT
CE
SCLK/SCLK
SIO
CPU
RS5C321A/B
System power
supply
B
A
System power supply
VDD
D
C
or
System
power
supply
10. 32.768kHz Clock Output
32KOUT outputs 32.768kHz clock pulse, the pin switches to high impedance when no output is made. 32.768kHz
clock is controllable by CLEN bit. Set the CE pin to “L” after power-on.
CLEN bit
32KOUT pin
0
32.768kHz clock pulse
1
High Inpedance
CLEN bit is set to 0 when XSTP is set to 1. (oscillation halt detecting or initial power on)
MAX. 61.0μs
CLEN bit
32KOUT pin
MAX. 91.6μs
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| RS5C338A | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:3-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICs WITH VOLTAGE MONITORING FUNCTION |
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