M54977 데이터 시트보기 (PDF) - Mitsumi
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M54977 Datasheet PDF : 6 Pages
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MITSUBISHI <CONTROL / DRIVER IC>
M54977P
Bi-CMOS 12-BIT SERIAL-INPUT LATCHED DRIVER
Setting the LATCH input to “L” will prevent data from entering the
latch.
When the EN input is set to “H”, all outputs (O1 – O12) will be set
to OFF. Since the internal logic state of the IC is uncertain at
power-on time, set the EN input to “H” (and outputs O1 – O12 will
set to OFF) until the input data is set and the internal logic state
has been determined.
L-GND is the ground of the CMOS logic circuit section and P-GND
is the ground for the output driver section (O1 – O12), which is
made up of bipolar transistors that are capable of driving large
currents.
TIMING CHART
Serial input S-IN
Clock T
Latch input LATCH
Enable input EN
O1
O2
O3
O4
O5
O6
Parallel outputs
O7
O8
O9
O10
O11
O12
Serial output S-OUT
*The state of the shaded part is unstable.
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