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PDF M54977 Data sheet ( Hoja de datos )
| Número de pieza | M54977 | |
| Descripción | Bi-CMOS 12-BIT SERIAL-INPUT LATCHED DRIVER | |
| Fabricantes | Mitsubishi | |
| Logotipo |  |
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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
T→ 1
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
1 page  
MITSUBISHI <CONTROL / DRIVER IC>
M54977P
Bi-CMOS 12-BIT SERIAL-INPUT LATCHED DRIVER
TIMING REQUIREMENTS (Ta=-20 to 75°C, unless otherwise noted)
Symbol
f(T)
tw(T)
tw(L)
tsu
th
td(T-L)
tr(T)
tf(T)
Parameter
Clock frequency
Clock pulse width
Latch pulse width
Data setup time
Data hold time
Clock-latch time
Clock pulse rise time
Clock pulse fall time
Test conditions
Input duty cycle: 40 – 60%
TIMING CHART
Serial input
S-IN
2.5V
2.5V
Limits
Min. Typ. Max.
Unit
2 MHz
200 ns
200 ns
100 ns
100 ns
400 ns
500 ns
500 ns
tsu th
Clock
T
2.5V
tw(T)
2.5V
10%
90%
tr(T)
90%
10%
tf(T)
td(T-L)
Latch input LATCH
2.5V
2.5V
tw(L)
SWITCHING CHARACTERISTICS (Ta=25°C, VCC=5V, unless otherwise noted)
Symbol
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
Parameter
Test conditions
Low-to-high-level output propagation time, From input T to output S-OUT
High-to-low-level output propagation time, From input T to output S-OUT
Low-to-high-level output propagation time, From input T to output ON
High-to-low-level output propagation time, From input T to output ON
Low-to-high-level output propagation time, From input EN to output ON
High-to-low-level output propagation time, From input EN to output ON
VIH=5V
VIL=0V
RL(S-OUT)=∞
RL(ON)=100Ω
(N=1–12)
CL=15pF
Min.
Limits
Typ.
(0.15)
(0.15)
(2)
(0.5)
(2)
(0.5)
Max.
0.3
0.3
10
2
10
2
Unit
µs
µs
µs
µs
µs
µs
TIMING CHART
Clock
T
Serial output S-OUT
2.5V
tPLH
2.5V
2.5V
tPHL
2.5V
Enable input
EN
Output
ON
tPLH
2.5V
tPHL
2.5V
2.5V
tPLH
2.5V
2.5V
tPHL
2.5V
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet M54977.PDF ] | |
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