M54992FP Mitsubishi Electronics America, Inc., M54992FP Datasheet

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M54992FP

Manufacturer Part Number
M54992FP
Description
Bi-cmos 24-bit Serial-input Latched Driver
Manufacturer
Mitsubishi Electronics America, Inc.
Datasheet
1.M54992FP.pdf (7 pages)

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DESCRIPTION
The M54992 is a semiconductor integrated circuit consisting of 24
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 24 bipolar drivers at the parallel outputs.
FEATURES
APPLICATION
Dot drivers of thermal printer heads, serial/parallel conversion.
Drivers for relays and solenoids.
FUNCTION
The M54992 consists of 24 stages of D-type flip flops connected to
24 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 M54992 to
expand the number of parallel outputs. S-OUT is connected to S-IN
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 O
data already present is shifted sequentially to outputs O
O
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 O
the internal logic is unstable when the power is turned on, the EN
input should be kept high (setting outputs O
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 O
transistors capable of large drive currents.
An output load prevention circuit is built in this IC to prevent
misoperation at power ON/OFF. Therefore, when V
the fixed level, all outputs (O
OFF state.
24
Serial input and serial or parallel output
Serial output enables cascade connection
Built-in latch for each stage
Enable input provides output control
Low supply current (standby current I
Serial I/O level is compatible with typical CMOS devices
Driver features: High withstand voltage (BV
Wide operating temperrature range T
Capable of large drive currents (I
.
1
through O
1
– O
O(max)
24
) are compulsorily set to the
1
a
CC
through O
24
=-10 – +75 C
=100mA)
1mA)
which employ bipolar
1
CEO
through O
24
30V)
CC
1
all turn off. As
and the other
falls short of
24
2
off) until
through
Bi-CMOS 24-BIT SERIAL-INPUT LATCHED DRIVER
PIN CONFIGURATION (TOP VIEW)
Parallel outputs
Parallel outputs
Parallel outputs
Parallel outputs
Parallel outputs
Serial input
Serial input
Latch input
Enable input
Clock
Clock
MITSUBISHI <CONTROL / DRIVER IC>
LATCH
GND
GND
GND
S-IN
S-IN
O
O
O
O
O
O
O
O
O
NC
EN
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
24
23
22
21
20
19
12
11
10
T
T
6
5
4
3
2
1
9
8
7
6
5
4
3
2
1
Outline 36P2R-A
10
11
12
13
14
15
16
17
18
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
Outline 36P4E
1
2
3
4
5
6
7
8
9
M54992P/FP
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
O
GND
O
O
NC
O
O
O
O
EN
V
O
O
O
O
NC
O
O
GND
V
O
O
O
O
O
O
O
O
O
O
O
SO
LATCH
CC
CC
17
7
8
9
10
11
12
13
14
15
16
17
18
13
14
15
16
18
GND
19
20
21
22
23
24
NC: no connection
Parallel outputs
Parallel outputs
Parallel outputs
Parallel outputs
Enable input
Parallel outputs
Parallel outputs
Serial input
Latch input

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M54992FP Summary of contents

Page 1

DESCRIPTION The M54992 is a semiconductor integrated circuit consisting of 24 stages of CMOS shift registers and latches with serial inputs and serial or parallel outputs based on Bi-CMOS process technology, and has 24 bipolar drivers at the ...

Page 2

BLOCK DIAGRAM TRUTH TABLE Input S-IN T LATCH ...

Page 3

... INPUT/OUTPUT CIRCUIT DIAGRAM 1 Inputs with pullup resistor (EN, LATCH Serial output (M54992FP) (S-OUT GND Bi-CMOS 24-BIT SERIAL-INPUT LATCHED DRIVER 2 Inputs with pulldown resistor (T, S-IN GND 4 Parallel outputs (O 1 MITSUBISHI <CONTROL / DRIVER IC> M54992P/ GND – GND ...

Page 4

... OFF – Duty cycle : 50% or below =5V, unless otherwise noted) CC Test conditions Ta=-10 – – S- =0V EN, LATCH M54992FP (S-OUT) V =4. =0. =100mA O – =80mA O – =30V(output: OFF) O – ...

Page 5

... High-to-low level output propagation time t PHL From input EN to output ON MITSUBISHI <CONTROL / DRIVER IC> Bi-CMOS 24-BIT SERIAL-INPUT LATCHED DRIVER 2.5V 2. 2.5V 2.5V 10% t w(T) t r(T) t d(T-L) 2.5V 2.5V t w(L) =5V, unless otherwise noted) CC Test conditions M54992FP L(S-OUT) R =100 L(ON) (N=1–24) C =15pF L M54992P/FP 90% 90% 10 (T) Limits Unit Min. Typ. Max. ...

Page 6

... TEST CIRCUIT Input V CC M54992P/ TIMING CHART Clock T 2.5V t PLH Serial output S-OUT (M54992FP) Enable input EN Output O N (N=1 – 24) Bi-CMOS 24-BIT SERIAL-INPUT LATCHED DRIVER R L The input waveform: t Output The capacitance C probe input capacitance 2.5V t PHL 2.5V 2.5V t PHL t PLH 2.5V MITSUBISHI <CONTROL / DRIVER IC> ...

Page 7

... Encircled figure means the number of 160 output circuits that operate concurrently. 140 120 100 Duty cycle (%) Duty cycle vs. allowable output current (M54992FP) 200 180 160 140 120 100 Duty cycle (%) Driver output V vs ...

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