MC14557BCP View Datasheet(PDF) - ON Semiconductor
Part Name
Description
Manufacturer
MC14557BCP Datasheet PDF : 8 Pages
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L2 1
L1 2
RESET 3
CLOCK 4
CE 5
B6
A7
VSS 8
16 VDD
15 L4
14 L8
13 L16
12 L32
11 Q
10 Q
9 A/B SEL
Figure 2. Pin Assignment
MC14557B
3
RESET
4
CLOCK
5
CE
6
B
Q
10
7
A
9
A/B SELECT
2
L1
1
L2
15
L4
Q
11
14
L8
13
L16
12
L32
VDD = PIN 16
VSS = PIN 8
Figure 3. Block Diagram
TRUTH TABLE
Inputs
Rst
A/B
Clock
CE
0
0
0
0
1
0
0
0
1
0
1
1
1
X
X
X
Q is the output of the first selected shift
register stage.
X = Don’t Care
Output
Q
B
A
B
A
0
LENGTH SELECT TRUTH TABLE
L32 L16 L8 L4 L2 L1 Register Length
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
1
0
0
0
0
0
1
1
0
0
0
1
0
0
0
0
0
1
0
1
1
0
0
0
0
0
1
0
0
0
0
1
1
1
1
1
0
0
1
1
1
1
0
1
1
1
1
1
1
0
1
1
1
1
1
1
1 Bit
2 Bits
3 Bits
4 Bits
5 Bits
6 Bits
33 Bits
34 Bits
61 Bits
62 Bits
63 Bits
64 Bits
NOTE: Length equals the sum of the binary length control
subscripts plus one.
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