LATCHED DRIVER. M54977P Datasheet

M54977P DRIVER. Datasheet pdf. Equivalent

Part M54977P
Description Bi-CMOS 12-BIT SERIAL-INPUT LATCHED DRIVER
Feature MITSUBISHI M54977P Bi-CMOS 12-BIT SERIAL-INPUT LATCHED DRIVER DESCRIPTION The.
Manufacture Mitsubishi
Datasheet
Download M54977P Datasheet

MITSUBISHI M54977P Bi-CMOS 12-BIT SERI M54977P Datasheet
Recommendation Recommendation Datasheet M54977P Datasheet





M54977P
MITSUBISHI <CONTROL / DRIVER IC>
M54977P
Bi-CMOS 12-BIT SERIAL-INPUT LATCHED DRIVER
DESCRIPTION
The M54977P is a semiconductor integrated circuit fabricated
using Bi-CMOS technology. It contains a serial input to
serial/parallel output 12-bit CMOS shift register and CMOS latch as
well as bipolar 12-bit parallel-output driver.
FEATURES
q Serial input to serial/parallel output
q Cascade connections possible through serial output
q Latch circuit included for each stage
q Enable input for output control
q Low supply current .................................. ICC 10µA at standby
q Serial input/output level is compatible with standard CMOS
q Driver : Withstand voltage ...................................... BVCEO 30V
Large drive current ................................ (IO(max)=200mA)
q Wide operating temperature range ..................... Ta=-20 – +75°C
PIN CONFIGURATION (TOP VIEW)
Clock
T1
Serial input S-IN 2
Logic GND L-GND 3
VCC 4
Serial output S-OUT 5
Latch input LATCH 6
Enable input EN 7
Parallel outputs
O12 8
O11 9
Driver GND P-GND 10
20 O1
19 O2
18 O3
17 O4
16 O5
15 O6
14 O7
13 O8
12 O9
11 O10
Parallel outputs
Outline 20P4
APPLICATION
Thermal printer head dot driver, Serial-to parallel conversion,
Relay, solenoid driver
FUNCTION
The M54977P consists of an 12-bit D-type flip-flop, the output of
which is connected to 12 latches.
When data is applied to the serial data input (S-IN) and a clock
pulse is applied to clock input (T), an “L” to “H” change of the clock
will cause the data input signals to enter the internal shift registers
and the data in the shift registers will be shifted in order.
Using a number of M54977P units for bit expansion in series will
entail connecting serial output (S-OUT) to S-IN of the next-stage
M54977P.
In parallel output, when the latch input is set to “H” and the output-
control input (enable input EN) is “L”, a clock pulse changing from
“L” to “H” will cause the serial data input signal to appear at output
O1, and the data will be shifted in order at outputs O2 – O12.
The parallel output will yield a signal that is inverted with respect to
the serial data input.
BLOCK DIAGRAM
Power supply VCC 4
Parallel outputs
O1 O2 O3 O4 O5 O6 O7 O8 O9 O10 O11 O12
20 19 18 17 16 15 14 13 12 11 9 8
10
P-GND
Driver GND
EN
Enable input
7
LATCH
Latch input
6
S-IN 2
Serial input
Clock T 1
QQQQQQQQQQQQ
LD LD LD LD LD LD LD LD LD LD LD LD
DQ DQ DQ DQ DQ DQ DQ DQ DQ DQ DQ DQ
TTTT TT T TTTT T
3
L-GND
5
S-OUT
Serial output



M54977P
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
Parallel outputs
O6
O7
O8
O9
O10
O11
O12
Serial output S-OUT
*The state of the shaded part is unstable.





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