Rainbow Electronics BU4028B - Manual

1
Standard ICs
BCD-to-decimal decoder
BU4028B
The BU4028B is a decoder which converts BCD signals to decimal signals.
Of the ten outputs Q
0
to Q
9
, those corresponding to the A to D input codes are set to “H”, and the others are all set to
“L”.
If inputs A to C are used and input D is used as disabled input, the BU4028B can also be used as a 1-of-8 decoder.
•
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 1LS-TTL input.
•
Block diagram
Q 2
Q 4
Q 8
Q 7
Q 9
Q 5
Q 6
Q 0
B
C
D
A
Q 1
Q 3
2 Q 2
Q 4
Q 7
Q 9
Q 5
Q 6
Q 0 3
4
5
6
7
8
15
14
13
12
11
10
9 V SS
1 V DD
B
C
IN
D
A
Q 1
Q 3
Q 8
16
•
Logic circuit diagram
A
B
C
D
Q 0
Q 1
Q 2
Q 3
Q 4
Q 5
Q 6
Q 7
Q 8
Q 9