參數(shù)資料
型號(hào)： MSM6542-02RS
廠商： OKI ELECTRIC INDUSTRY CO LTD
元件分類(lèi)： 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取
英文描述： 0 TIMER(S), REAL TIME CLOCK, PDIP18
封裝： 0.300 INCH, PLASTIC, DIP-18
文件頁(yè)數(shù)： 6/54頁(yè)
文件大小： 406K
代理商： MSM6542-02RS
Semiconductor
MSM6542-01/02/03
81
XT and XT (X'tal OSC)
These pins are the connecting terminals to connect the capacitors and crystal oscillator at
32.768kHz as shown below.
VDD
or
GND
5M
TYP.
200K
TYP.
XT
32.768
kHz
C1
C2
XT MSM6542
Example
(Equivalent series resistance < 30 k
C
1, C2 = 15 to 30 pF)
Note:
Oscillation accuracy and allowable values of the equivalent series resistor for the
crystal oscillator depend on the value of the capacitor used for oscillation. For
selection of a crystal oscillator and the value of the capacitor needed for it,
consult the crystal oscillator manufacturer.
To supply external 32.768 kHz clocks, enter CMOS output or pulled-up TTL output to the XT
pin and leave the XT pin open.
V
DD and VSS
These are power supply pins. Connect the V
SS pin to ground and supply positive power to the
V
DD pin.
The 1 Hz, 30 sec ADJ, STOP/START, and 68/80 pins described below are used only for the
MSM6542-03.
1 Hz
This output pin is used to confirm the oscillation frequency. It outputs 1-Hz pluses at a duty
cycle of 50%.
This pin provides one-second output from the clock counter. Therefore, it is cleared to a low
when the REST bit is high or 30-second adjustment is performed. When STOP function is
performed, the output stops at whatever level the output is at that instant.
This pin provides CMOS output level, regardless of the level of the CS
1 pin. If a load is connected
to this pin during standby operation, the battery will be quickly dissipated.
=
相關(guān)PDF資料
PDF描述
MSM6542-03GS-VK 0 TIMER(S), REAL TIME CLOCK, PDSO24
MSM6542-03RS 0 TIMER(S), REAL TIME CLOCK, PDIP24
MSM65513-GS-VK 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP64
MSM65513-JS 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQCC68
MSM65513-XXSS 8-BIT, MROM, 10 MHz, MICROCONTROLLER, PDIP64
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