MC14557 ONSEMI [ON Semiconductor], MC14557 Datasheet - Page 2

• Manufacturer Part Number: MC14557
• Description: 1-to-64 Bit Variable Length Shift Register
• Manufacturer: ONSEMI [ON Semiconductor]

NOTE: Length equals the sum of the binary length control
L32
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1









subscripts plus one.
L16
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1









LENGTH SELECT TRUTH TABLE
Q is the output of the first selected shift
X = Don’t Care
Rst
register stage.
0
0
0
0
1
15
14
13
12
L8
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
3
4
5
6
7
9
2
1









CLOCK
RESET
V
CE
L2
L1
SS
http://onsemi.com
PIN ASSIGNMENT
A/B
B
A
L4
BLOCK DIAGRAM
X
Inputs
0
1
0
1
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
1









RESET
CLOCK
CE
B
A
A/B SELECT
L1
L2
L4
L8
L16
L32
TRUTH TABLE
MC14557B
1
2
3
4
5
6
7
8
V
V
DD
L2
SS
Clock
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
0
1
1
0
0









= PIN 16
2
X
= PIN 8
1
1
L1
16
15
14
13
12
11
10
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
1









9
CE
0
0
X
Q
Q
L4
V
L8
L16
L32
Q
Q
A/B SEL
DD
Register Length
Output
Q
B
A
B
A
33 Bit
33 Bits
34 Bits
34 Bits
61 Bits
62 Bits
63 Bits
64 Bit
64 Bits
10
11
0
2 Bit
2 Bits
3 Bits
3 Bits
4 Bits
4 Bits
5 Bits
5 Bits
6 Bits
6 Bits
1 Bit