MITSUBISHI <CONTROL / DRIVER IC>
M54995P/FP
Bi-CMOS 8-BIT SERIAL-INPUT LATCHED DRIVER
DESCRIPTION
The M54995 is a semiconductor integrated circuit consisting of 8
stages of CMOS shift registers and latches with serial inputs and
serial or parallel outputs. It is based on Bi-CMOS process
technology, and has 8 bipolar drivers at the parallel outputs.
PIN CONFIGURATION (TOP VIEW)
Clock
Serial input
Logic GND
T
→
S-IN
→
L-GND
V
CC
S-OUT
←
1
2
16
→
O1
15
→
O2
14
→
O3
13
→
O4
12
→
O5
11
→
O6
10
→
O7
9
Parallel outputs
M54995P/FP
3
4
5
6
7
8
FEATURES
q
Serial input and serial or parallel output
q
Serial output enables cascade connection
q
Built-in latch for each stage
q
Enable input provides output control
q
Low supply current (standby current I
CC
≤10µA)
q
Serial I/O level is compatible with typical CMOS devices
q
Driver features: High withstand voltage (BV
CEO
≥30V)
q
Wide operating temperature range T
a
=-20 – +75°C
Power supply
Serial output
Latch input
LATCH
Enable input
→
EN
→
Driver GND
P-GND
→
O8
Outline 16P4(P)
16P2N-A(FP)
of the next stage.
For parallel output. When the clock pulse changes from low to
high, latch input (LATCH) is high and output enable input (EN) is
low the serial input data at S-IN appears at output O1 and the other
data already present is shifted sequentially to outputs O2 through
O8.
The parallel outputs are inverted.
When the latch input is held low, the latch retains the stored data.
When the EN input is high, outputs O1 through O8 all turn off. As
the internal logic is unstable when the power is turned on, the EN
input should be kept high (setting outputs O1 through O8 off) until
input data is set and the internal logic is initialized.
L-GND is the GND of CMOS logic circuit and P-GND is the GND of
output driver circuits O1 through O8 which employ bipolar
transistors capable of large drive currents.
APPLICATION
Dot drivers for thermal print heads. Serial/parallel conversion.
Drivers for relays and solenoids.
FUNCTION
The M54995 consists of 8 stages of D-type flip flops connected to
8 latches.
Data is input to serial input S-IN, and clock pulses are input to
clock input T. When the clock changes from low to high, the input
data enters the first shift register and data already in the shift
registers is shifted sequentially.
The serial output S-OUT is used to connect multiple M54995 to
expand the number of parallel outputs. S-OUT is connected to S-IN
BLOCK DIAGRAM
O1
16
O2
15
O3
14
Parallel outputs
O4
13
O5
12
O6
11
O7
10
O8
9
Power supply
V
CC
4
8 P-GND
Driver GND
Enable input
EN 7
Q
L
D
L
Q
D
L
Q
D
L
Q
D
L
Q
D
L
Q
D
L
Q
D
L
Q
D
Latch input LATCH 6
Serial input
S-IN 2
D
T
Q
D
T
Q
D
T
Q
D
T
Q
D
T
Q
D
T
Q
D
T
Q
D
T
Q
5 S-OUT Serial output
Clock
T 1
3
L-GND
Logic GND
MITSUBISHI <CONTROL / DRIVER IC>
M54995P/FP
Bi-CMOS 8-BIT SERIAL-INPUT LATCHED DRIVER
TIMING CHART
Serial input
Clock
S-IN
T
Latch input LATCH
Enable input
EN
O1
O2
O3
O4
Parallel outputs
O5
O6
O7
O8
Serial output S-OUT
*The state of the shaded part is unstable.
INPUT/OUTPUT CIRCUIT DIAGRAM
1
Inputs with pullup resistor
(EN, LATCH)
2
V
CC
Inputs with pulldown resistor
(T, S-IN)
V
CC
R
IN
R
IN
L-GND
L-GND
3
Serial output
(S-OUT)
V
CC
4
Parallel outputs
(O1 – O8)
V
CC
P-GND
L-GND
L-GND
MITSUBISHI <CONTROL / DRIVER IC>
M54995P/FP
Bi-CMOS 8-BIT SERIAL-INPUT LATCHED DRIVER
ABSOLUTE MAXIMUM RATINGS
(T
a
=-20 to 75°C, unless otherwise noted)
Symbol
V
CC
V
I
V
O
I
O
P
d
T
opr
T
stg
Supply voltage
Input voltage
Output voltage
Output current
Power dissipation
Operating temperature
Storage temperature
S-OUT
O1 – O8 : OFF
O1 – O8 : ON
T
a
=25°C
M54995P
M54995FP
Parameter
Conditions
Ratings
-0.5 – +8
-0.5 – V
CC
+0.5
-0.5 – V
CC
+0.5
-0.5 – 30
60
1.25
0.8
-20 – 75
-55 – 125
Unit
V
V
V
mA
W
°C
°C
RECOMMENDED OPERATING DONDITION
Symbol
V
CC
V
O
I
O
Parameter
Supply voltage
Output apply voltage
Output current (per circuit)
Conditions
Min.
4
Limits
Typ.
5
Max.
6
30
50
Unit
V
V
mA
O1 – O8 : OFF
O1 – O8 : ON
ELECTRICAL CHARACTERISTICS
(T
a
=25°C, V
CC
=5V, unless otherwise noted)
Symbol
V
IH
V
IL
I
IH
I
IL
R
IN
V
OH
V
OL
I
OH
I
OL
V
OL1
V
OL2
I
OLK
I
CC1
I
CC2
Parameter
High-level input voltage
Low-level input voltage
High-level input current
Low-level input current
Input resistance
High-level output voltage
Low-level output voltage
High-level output current
Low-level output current
Low-level output voltage
Output leak current
Supply current
Test conditions
T
a
=20 – 75°C, V
CC
=4 – 6V
S-IN, T
EN, LATCH
S-OUT
S-OUT
S-OUT
S-OUT
O1 – O8
O1 – O8
V
IH
=5V
V
IL
=0V
50
4.9
0.1
-100
400
0.5
0.6
50
10
3
Min.
0.7V
CC
0
Limits
Typ.
Max.
V
CC
0.3V
CC
100
-100
Unit
V
V
µA
µA
kΩ
V
V
µA
µA
V
V
µA
µA
mA
|
IO
|≤1µA
V
OH
=4.5V
V
OL
=0.4V
I
OL
=50mA
I
OL
=60mA
V
O
=30V
Input: open, All driver outputs: OFF
One driver output is ON.
TIMING REQUIREMENTS
(T
a
=-20 to 75°C, unless otherwise noted)
Symbol
f
(T)
t
w(T)
t
w(L)
t
su
t
h
t
d(T-L)
t
r(T)
t
f(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%
200
200
100
100
400
500
500
Min.
Limits
Typ.
Max.
2
Unit
MHz
ns
ns
ns
ns
ns
ns
ns
MITSUBISHI <CONTROL / DRIVER IC>
M54995P/FP
Bi-CMOS 8-BIT SERIAL-INPUT LATCHED DRIVER
TIMING CHART
Serial data input
S-IN
2.5V
2.5V
t
su
t
h
90%
Clock
T
2.5V
t
w(T)
t
d(T-L)
2.5V
10%
t
r(T)
90%
10%
t
f(T)
Latch input LATCH
2.5V
t
w(L)
2.5V
SWITCHING CHARACTERISTICS
(T
a
=25°C, V
CC
=5V, unless otherwise noted)
Symbol
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
Parameter
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 O
N
High-to-low-level output propagation time
From input T to output O
N
Low-to-high-level output propagation time
From input EN to output O
N
High-to-low-level output propagation time
From input EN to output O
N
Input
V
CC
Test conditions
Min.
Limits
Typ.
Max.
0.3
Unit
µs
µs
µs
µs
µs
µs
V
IH
=5V
V
IL
=0V
R
L
(S-OUT)=∞
R
L
(O
N
)=100Ω
(N=1–8)
C
L
=15pF
5
10
5
10
0.3
TEST CIRCUIT
R
L
PG
50Ω
M54995P/FP
C
L
Output
The input waveform: t
r
≤
20ns, t
f
≤
20ns
The capacitance C
L
includes the wiring stray capacitance and probe
input capacitance.
TIMING CHART
Clock
T
2.5V
t
PLH
Serial output S-OUT
2.5V
2.5V
2.5V
t
PHL
Enable input
EN
t
PLH
2.5V
t
PHL
2.5V
2.5V
t
PLH
2.5V
2.5V
t
PHL
2.5V
Output
O
N
MITSUBISHI <CONTROL / DRIVER IC>
M54995P/FP
Bi-CMOS 8-BIT SERIAL-INPUT LATCHED DRIVER
TYPICAL CHARACTERISTICS
(T
a
=25°C, V
CC
=5V, unless otherwise noted)
Thermal derating
(Absolute maximum rating)
1.5
M54995P
100
Duty cycle vs. output current
(M54995P/FP)
Power dissipation P
d
(W)
Output current I
OL
(mA)
75
1.0
M54995FP
50
T
a
= 75°C
Repetitive frequency
>10H
Z
Each figure in a circle shows
the number of output circuits which
operate simultaneously.
Current value : output current per circuit
0
20
40
60
80
1
–
8
0.5
25
0
0
25
50
75
100
0
100
Ambient temperature T
a
(°C)
Duty cycle (%)
Driver output V
OL
vs. I
OL
7
V
CC
vs. I
CC
(Only one output is ON.)
Low-level output current I
OL
(mA)
100
6
Supply current I
CC
(mA)
5
4
3
2
1
T
a
= -20°C
T
a
= 25°C
T
a
= 75°C
50
0
0
100
200
300
400
500
0
0
5
10
Low-level output voltage V
OL
(mV)
Supply voltage V
CC
(V)
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