M54977 Просмотр технического описания (PDF) - Mitsumi

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M54977

Bi-CMOS 12-BIT SERIAL-INPUT LATCHED DRIVER

Mitsumi 

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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