Rainbow Electronics BU4015BF User Manual
1
Standard ICs
Dual 4-bit static shift register
BU4015B / BU4015BF
The BU4015B and BU4015BF are 4-stage static shift registers, each consisting of two circuits.
The D flip-flops for each stage share a common reset input, enabling external asynchronous reset at any point.
Also, the flip-flops at each stage are triggered by the rising edge of the clock input.
“H” level reset input resets the contents of all stages to “L”, regardless of the clock and data input, and sets data outputs Q0 to Q3 to “L”.
•
Features
1) 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
2
Q
3B
Q1A
Q0A
DA
Q2B
3
4
5
6
RESET
A
7
8
15
14
13
12
11
10
9
V
SS
1
CLOCK
B
D
B
VDD
Q0B
Q1B
Q2B
Q3A
RESET
B
CLOCK
A
16
Q3 Q2 Q1
CL R D
Q
0
CL R D
Q
0 Q1 Q2
Q3
•
Logic circuit diagram
D
Q
0 Q1 Q2 Q3
CLOCK
RESET
DQ
CL
Q
R
DQ
CL
Q
R
DQ
CL
Q
R
DQ
CL
Q
R
•
Truth table
CLOCK D RESET Q
0
Q
1
Q
2
Q
3
LL LQ0Q
1
Q
2
HL HQ0Q
1
Q
2
X L No Change
XXH L LL
L
X : Irrelevant
2
Standard ICs BU4015B / BU4015BF
•
Absolute maximum ratings (VSS = 0V, Ta = 25°C)
Parameter Symbol Limits Unit
Power supply voltage V
DD – 0.3 ~ + 18 V
Power dissipation Pd 1000 (DIP), 500 (SOP) mW
Operating temperature Topr – 40 ~ + 85 °C
Storage temperature Tstg – 55 ~ + 150 °C
Input voltage V
IN – 0.3 ~ VDD + 0.3 V
•
Electrical characteristics
DC characteristics (unless otherwise noted, Ta = 25°C, V
SS = 0V)
Parameter Symbol Min. Typ. Max. Unit Conditions
V
DD (V)
Input high level voltage V
IH
3.5 ——
V
5
—7.0 —— 10
11.0 —— 15
Input low level voltage V
IL
——1.5
V
5
———3.0 10
——4.0 15
Input high level current I
IH ——0.3 µ
A15V
IH = 15V
Input low level current I
IL — — – 0.3 µ
A15V
IL = 0V
Output high level voltage V
OH
4.95 ——
V
5
I
O = 0mA9.95 —— 10
14.95 —— 15
Output low level voltage V
OL
——0.05
V
5
I
O = 0mA——0.05 10
——0.05 15
Output high level current I
OH
– 0.16
——
mA
5V
OH = 4.6V
– 0.4 —— 10 V
OH = 9.5V
– 1.2 —— 15 V
OH = 13.5V
Output low level current I
OL
0.44 ——
mA
5VOL = 0.4V
1.1 —— 10 V
OL = 0.5V
3.0 —— 15 V
OL = 1.5V
Static current dissipation I
DD
——20
µ
A
5
V
I = VDD or GND——40 10
——80 15
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