BU4015B Datasheet, PDF (1/4 Pages) Rohm – Dual 4-bit static shift register

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 out-
puts 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}
CLOCK ₁
B
Q3B 2
Q2B 3
Q1A 4
Q0A 5
RESET ₆
A
DA 7
VSS 8
CL R D
Q3 Q2 Q1 Q0
Q0 Q1 Q2 Q3
CL R D
16 VDD
15 DB
14 ^RESET
B
13 Q0B
12 Q1B
11 Q2B
10 Q3A
9
CLOCK
A
•^{Logic circuit diagram}
Q0
Q1
Q2
Q3
D
CLOCK
RESET
DQ
CLR Q
DQ
CLR Q
DQ
CLR Q
DQ
CLR Q
•^{Truth table}
CLOCK D RESET Q0
Q1
Q2
Q3
L
L
L
Q0
Q1
Q2
H
L
H
Q0
Q1
Q2
X
L
No Change
X
X
H
L
L
L
L
X : Irrelevant
1