MSC1164GS-K データシートの表示（PDF） - Oki Electric Industry
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MSC1164GS-K Datasheet PDF : 13 Pages
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¡ Semiconductor
FUNCTIONAL DESCRIPTION
Function Table
MSC1164
CLK DIN
H
L
R-1 R-2 R-3 R-4
H R1n R2n R3n
L R1n R2n R3n
•••••••••••••••
R-20
R19n
R19n
DOUT
R19n
R19n
CL
CHG LS
R.X HVO.X
L
X
X
X
L
H
H
X
X
H
H
L
H
H
H
H
L
H
L
L
H
L
L
X
NC
L: Low Level, H: High Level, X: Don't Care, NC: Change
NOTES ON USE
1. The MSC1164 is designed as a grid/anode driver of VFD.
The data applied to the data input pin is read into the shift register at the rising edge of the
clock and shifted sequencially to the shift register synchronizing with the clock.
The shift register output drives the output driver, passing through the latch and the NOR
circuit.
Setting the CL pin to "L" makes all driver outputs go into "L". This function can be used for
setting display blanking.
2. The contents of the shift register are undefined after power is turned on.
Therefore, two or more driver outputs may go into "H" at the same time after power-on. (If
it happens, an overloading beyond the power dissipation limit may occur to cause a device
break-down.)
To avoid this, take the following procedure:
1) Turn on the power of the logic portion while holding the CL pin to "L".
2) Turn on the power of the driver portion.
3) Apply a "L" level signal to the DIN pin and send clock pulses by the specified number
of grids to reset ("L") the entire contents of the shift register.
4) Initialize the driver outputs to "L".
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