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MITSUBISHI
M54992P/FP
Bi-CMOS 24-BIT SERIAL-INPUT LATCHED DRIVER
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.
PIN CONFIGURATION (TOP VIEW)
GND 1 O6 2 O5 3 36 GND 35 O7 Parallel outputs 34 O8 33 NC 32 O9 31 O10 30 O11 29 O12 Parallel outputs O4 4 Parallel outputs O3 5 O2 6 O1 7 Serial input Clock S-IN 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 ICC1mA) q Serial I/O level is compatible with typical CMOS devices q Driver features: High withstand voltage (BVCEO30V) Capable of large drive currents (IO(max)=100mA) q Wide operating temperrature range Ta=-10 - +75C
M54992P
T9
28 EN 27 VCC 26 O13 25 O14
Enable input
Latch input LATCH 10 O24 11 O23 12 Parallel outputs O22 13
Parallel outputs 24 O15 23 O16 22 NC 21 O17 Parallel outputs 20 O18 19 GND O21 14 NC 15
APPLICATION
Dot drivers of thermal printer heads, serial/parallel conversion. Drivers for relays and solenoids.
Parallel outputs
O20 16 O19 17
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 O1 and the other data already present is shifted sequentially to outputs O2 through O24. 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 O24 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 O24 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 O24 which employ bipolar 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 VCC falls short of the fixed level, all outputs (O1 - O24) are compulsorily set to the OFF state.
Serial input Clock Parallel outputs Parallel outputs Enable input
GND 18
Outline 36P4E
EN
1
36 VCC 35 O13 34 O14 33 O15 32 O16 31 O17 30 O18 29 28 27 26 O19 25 O20 24 O21 23 O22 22 O23 21 O24 20 SO Serial input Parallel outputs GND Parallel outputs
O12 2 O11 3 O10 4 O9 5 O8 6 O7 7 8 GND 9 10 O6 11 O5 12 O4 13 O3 14 O2 15 O1 16 S-IN 17 T 18
Outline 36P2R-A
M54992FP
19 LATCH Latch input
NC: no connection
MITSUBISHI
M54992P/FP
Bi-CMOS 24-BIT SERIAL-INPUT LATCHED DRIVER
BLOCK DIAGRAM
Parallel outputs O1 O2 O3 O4 O5 O6
- -
O12 O13
- -
O19
O20
O21
O22
O23
O24
Q L D L
Q D L
Q D L
Q D L
Q D L
Q D L
Q D L
Q D L
Q D L
Q D
LATCH Latch input
Output misoperation prevention circuit
S-IN Serial input
D T
Q
D T
Q
D T
Q
D T
Q
D T
Q
D T
Q
D T
Q
D T
Q
D T
Q
D T
Q
TRUTH TABLE
S-IN L L H H H Input Output O1-O24 EN LATCH T S-OUT L L IN L t-1 L H IN L L L L IN H t-1 L H IN H H H H IN H L T: IN means to input following signal
1 2 23 24
T Clock
L : low level H : high level t-1 : previous state H output : OFF state L output : ON state
S-OUT Serial output (M54992FP)
VCC Power supply GND
EN Enable input
MITSUBISHI
M54992P/FP
Bi-CMOS 24-BIT SERIAL-INPUT LATCHED DRIVER
INPUT/OUTPUT CIRCUIT DIAGRAM
1 Inputs with pullup resistor (EN, LATCH) 2 Inputs with pulldown resistor (T, S-IN)
VCC
VCC
RIN
RIN
GND
GND
3
Serial output (M54992FP) (S-OUT)
4
Parallel outputs (O1 - O24)
VCC
VCC
GND GND
MITSUBISHI
M54992P/FP
Bi-CMOS 24-BIT SERIAL-INPUT LATCHED DRIVER
ABSOLUTE MAXIMUM RATINGS (Ta=-10 to 75C, unless otherwise noted)
Symbol VCC VI VO IO Pd Topr Tstg Supply voltage Input voltage Output voltage Output current Power dissipation Operating temperature Storage temperature Ta=25C Mounted on a board M54992P M54992FP S-OUT O1 - O24 : OFF M54992FP Parameter Conditions Ratings -0.5 - 8 -0.5 - VCC+0.5 -0.5 - VCC+0.5 -0.5 - 30 120 2.0 1.9 -10 - 75 -55 - 125 Unit V V V V mA W W C C
RECOMMENDED OPERATING CONDITION (Ta=-10 to 75C, unless otherwise noted)
Symbol VCC VO IO Parameter Supply voltage Output apply voltage Output current (per circuit) Test conditions Min. 4 O1 - O24 : OFF O1 - O24 : ON Duty cycle : 50% or below Limits Typ. 5 Max. 6 30 100 Unit V V mA
ELECTRICAL CHARACTERISTICS (Ta=25C, VCC=5V, unless otherwise noted)
Symbol VIH VIL IIH IIL VOH VOL IOH IOL VOL1 VOL2 IOLK ICC1 Supply current ICC2 VT+ VTMisoperation prevention supply voltage. One driver output is ON. -- 2.9 2.6 3.5 3.4 3.1 5.0 3.9 3.6 mA V V Parameter High-level input voltage Low-level input voltage High-level input current Low-level input current High-level output voltage Low-level output voltage High-level output current Low-level output current Low-level output voltage Output leak current Test conditions Ta=-10 - 75C, VCC=4 - 6V T, S-IN EN, LATCH |IO|1A M54992FP (S-OUT) VOH=4.5V VOL=0.4V IOL=100mA O1 - O24 IOL=80mA O1 - O24 VO=30V(output: OFF) O1 - O24 Input: open All driver outputs are OFF. VIH=5V VIL=0V Min. 0.7VCC 0 -- -- 4.9 -- -100 400 -- -- -- -- Limits Typ. Max. VCC 0.3VCC 25 -25 -- 0.1 -- -- 0.55 0.4 50 1 Unit V V A A V V A A V V A mA
TIMING REQUIREMENTS (Ta=-10 to 75C, 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: 45 - 55% 100 100 50 20 400 500 500 Min. Limits Typ. Max. 4 Unit MHz ns ns ns ns ns ns ns
MITSUBISHI
M54992P/FP
Bi-CMOS 24-BIT SERIAL-INPUT LATCHED DRIVER
TIMING CHART
Serial input
S-IN 2.5V 2.5V
tsu
th
90% Clock input T 2.5V 2.5V 10% tw(T) tr(T) td(T-L) Latch input LATCH
90%
10%
tf(T)
2.5V
2.5V
tw(L)
SWITCHING CHARACTERISTICS (Ta=25C, VCC=5V, unless otherwise noted)
Symbol tPLH tPHL tPLH tPHL tPLH tPHL 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 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 Test conditions M54992FP VIH=5V VIL=0V Min. Limits Typ. Max. 0.2 0.2 10 RL(S-OUT)= RL(ON)=100 (N=1-24) CL=15pF 5 5 10 Unit s s s s s s
MITSUBISHI
M54992P/FP
Bi-CMOS 24-BIT SERIAL-INPUT LATCHED DRIVER
TEST CIRCUIT
Input VCC
RL PG 50
M54992P/FP
CL
Output
The input waveform: tr 20ns, tf 20ns The capacitance CL includes the wiring stray capacitance and probe input capacitance.
TIMING CHART
Clock
T
2.5V tPLH
2.5V tPHL
Serial output
S-OUT 2.5V 2.5V
(M54992FP)
Enable input
EN
2.5V tPHL tPLH tPLH 2.5V 2.5V 2.5V
2.5V tPHL
Output
ON (N=1 - 24)
2.5V
MITSUBISHI
M54992P/FP
Bi-CMOS 24-BIT SERIAL-INPUT LATCHED DRIVER
TYPICAL CHARACTERISTICS (VCC=5V, unless otherwise noted)
Duty cycle vs. allowable output current (M54992P)
200 180 160 Corrector current is a current per circuit. Repetition frequency 10Hz Encircled figure means the number of output circuits that operate concurrently.
Duty cycle vs. allowable output current (M54992P)
200 180 Corrector current is a current per circuit. Repetition frequency 10Hz Encircled figure means the number of output circuits that operate concurrently.
Output current IO (mA)
140 120 100 80 60 40 20 0 0 20 40 60 80 100
1
Output current IO (mA)
160 140 120 100 80 60 40 20 0 0
-
24
1 - 14 15 16 20 24
20
40
60
80
100
Duty cycle (%)
Duty cycle (%)
Duty cycle vs. allowable output current (M54992FP)
200 180 160 Corrector current is a current per circuit. Repetition frequency 10Hz Encircled figure means the number of output circuits that operate concurrently.
Duty cycle vs. allowable output current (M54992FP)
200 180
Output current IO (mA)
140 120 100 80 60 40 20 0 0 20 40 60 80 100
1
Output current IO (mA)
160 140 120 100 80 60 40 20 0 0 20 40 60 80 100
1 18 20 24
-
22
-
14
24 23
13
Duty cycle (%)
Duty cycle (%)
Thermal derating (Absolute maximum ratings)
3 200
Driver output VOL vs. IOL
Low-level output current IOL (mA)
Ta = -25C Ta = 25C
Power dissipation Pd (W)
2 M54992P 1.9 M54992FP
Ta = 75C 100
1.2 1 1.1
0 0 25 50 75 100
0 0 0.5 1.0
Ambient temperature Ta (C)
Low-level output voltage VOL (V)

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