Rohm BU4528 Dual monostable multivibrator Datasheet

Standard ICs
Dual monostable multivibrator
BU4528B / BU4528BF
The BU4528B and BU4528BF are monostable multivibrators with trigger and reset functions that can be activated.
Each chip has two built-in circuits.
Triggers can initiate both rising and falling in response to Input A and Input B. As the output monostable pulse width
is determined by the time constant of the external resistance (Rx) and the capacitor (Cx), a wide range of output
pulse widths can be set.
Setting the RESET input to "L" enables external asynchronous resetting and this RESET input can be utilized to
reduce the time from the trigger disable input or the power on until the BU4528B and BU4528BF are ready for monostable operation.
•1)Features
Low power dissipation.
2) Wide range of operating power supply voltages.
3) High input impedance.
4) High fan-out.
5) Direct drive of 2 L-TTL inputs and 1 LS-TTL input.
•Block diagram
T11
1
16 VDD
T21
2
15 T12
RESET1
3
14 T22
A1
4
13 RESET2
B1
5
12 A2
Q1
6
11 B2
Q1
7
10 Q2
VSS
8
9
•Truth table
•Logic circuit diagram
INPUT
RESET
A
OUTPUT
B
Q
Q
CX
RX
VDD
H
H
H
Q2
L
H
H
H
H
L, H,
T1
L
Not Triggered
H
Not Triggered
Not Triggered
H
L
L
X
X
L
X
X
Not Triggered
L, H,
A
B
T2
Q
Q
RESET
Not Triggered
H
1
Standard ICs
BU4528B / BU4528BF
•Absolute maximum ratings (Ta = 25°C, V
SS
Parameter
= 0V)
Symbol
Limits
Unit
Power supply voltage
VDD
– 0.3 ~ + 18
V
Power dissipation
Pd
1000 (DIP), 500 (SOP)
mW
Operating temperature
Topr
– 40 ~ + 85
°C
Storage temperature
Tstg
– 55 ~ + 150
°C
– 0.3 ~ VDD + 0.3
V
VIN
Input voltage
characteristics
•DCElectrical
characteristics (unless otherwise noted, Ta = 25°C, V
Parameter
Input high level voltage
Input low level voltage
Min.
Max.
Unit
3.5
—
—
VIH
7.0
—
—
11.0
—
—
15
—
—
1.5
5
—
—
3.0
—
—
4.0
Conditions
VDD (V)
5
V
V
—
10
—
10
15
Input high level current
IIH
—
—
0.3
µA
15
VIH = 15V
Input low level current
IIL
—
—
– 0.3
µA
15
VIL = 0V
4.95
—
—
9.95
—
—
14.95
—
—
—
—
0.05
—
—
0.05
Output high level voltage
Output low level voltage
VOH
VOL
—
Output high level current
Output low level current
Static current dissipation
2
= 0V)
Symbol
VIL
Typ.
SS
IOH
IOL
IDD
5
V
10
IO = 0mA
15
5
V
10
IO = 0mA
—
0.05
15
– 0.16
—
—
5
VOH = 4.6V
– 0.4
—
—
10
VOH = 9.5V
– 1.2
—
—
15
VOH = 13.5V
0.44
—
—
1.1
—
—
3.0
—
—
—
—
20
—
—
40
—
—
80
mA
mA
5
VOL = 0.4V
10
VOL = 0.5V
15
VOL = 1.5V
5
µA
10
15
VI = VDD or GND
Standard ICs
BU4528B / BU4528BF
Switching characteristics (Ta = 25°C, CL = 50pF, VSS = 0V)
Parameter
Output rise time
Output fall time
Propagation delay time,
A or B to Q or Q
Propagation delay time,
A or B to Q or Q
Propagation delay,
Reset to Q or Q
Minimum input
pulse width
Output pulse width
Output pulse width
Minimum trigger time
Input capacitance
Symbol
tTLH
tTHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tWIN
tWOUT1
tWOUT2
trr
CIN
Min.
Typ.
Max.
Unit
—
100
—
ns
5
—
50
—
ns
10
—
40
—
ns
15
—
100
—
ns
5
—
50
—
ns
10
—
40
—
ns
15
—
325
—
ns
5
—
120
—
ns
10
—
90
—
ns
15
—
705
—
ns
5
—
290
—
ns
10
—
210
—
ns
15
—
325
—
ns
5
—
90
—
ns
10
—
60
—
ns
15
—
1000
—
ns
5
—
300
—
ns
10
—
250
—
ns
15
—
70
—
ns
5
—
30
—
ns
10
—
30
—
ns
15
—
550
—
ns
5
—
350
—
ns
10
VDD (V)
—
300
—
ns
15
25
40
55
µs
5
10
50
90
µs
10
15
55
95
µs
15
—
0
—
ns
5
—
0
—
ns
10
—
0
—
ns
15
—
5
—
pF
—
Conditions
—
—
CX = 15pF, RX = 5kΩ
CX = 1000pF, RX = 10kΩ
CX = 15pF, RX = 5kΩ
CX = 1000pF, RX = 10kΩ
CX = 1000pF, RX = 10kΩ
CX = 15pF, RX = 5kΩ
CX = 15pF, RX = 5kΩ
CX = 1000pF, RX = 10kΩ
CX = 1000pF, RX = 10kΩ
CX = 15pF, RX = 5kΩ
—
3
Standard ICs
BU4528B / BU4528BF
•Measurement circuits
VDD
RX
CX
VDD
T2
T1
A
Q
B
Q
RESET
P.G.
P.G.
P.G.
CL
CL
VSS
Fig. 1 Switching time measurement circuit
20ns
20ns
90%
50%
50%
10%
A
20ns
20ns
B
90%
50%
10%
20ns
20ns
RESET
90%
50%
10%
tPLH
tWOUT
tPLH
tr
tf
90%
90%
50%
50%
50%
50%
10%
10%
Q
tPHL
tPHL
tPHL
tr
tf
tPHL
Q
90%
50%
50%
50%
50%
10%
tWOUT
Fig. 2 Switching time waveform
4
trr
Standard ICs
BU4528B / BU4528BF
•Timing chart
AIN
BIN
RESET
Q
Q
tN
tN
t1
t2
t3
tN
tN : (Cx > 0.01µF) tN ⱌ [0.2 + 0.1 (VDD – VSS) ] · RxCx
5
t1, t2, t3 : t1,t2 ,t3 < tN
: TRIGGER
: RESET
: RETRIGGER
Fig. 3
•Electrical characteristic curve
POWER DISSIPATION: Pd (mW)
1200
1000
DIP16
800
600
SOP16
400
200
0
0
25
50
75
100
125
150
AMBIENT TEMPERATURE: Ta (°C)
Fig. 4 Power dissipation vs. Ta
•External dimensions (Units: mm)
BU4528B
BU4528BF
10.0 ± 0.2
0.51Min.
3.2 ± 0.2 4.25 ± 0.3
6.2 ± 0.3
7.62
0.3 ± 0.1
2.54
0.5 ± 0.1
16
9
1
8
1.27
0.4 ± 0.1
0.15 ± 0.1
8
0.11
1
1.5 ± 0.1
9
6.5 ± 0.3
16
4.4 ± 0.2
19.4 ± 0.3
0.3Min.
0° ~ 15°
0.15
DIP16
SOP16
5
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