MC74HC589AD ONSEMI [ON Semiconductor], MC74HC589AD Datasheet - Page 5

• Manufacturer Part Number: MC74HC589AD
• Description: 8-Bit Serial or Parallel-Input/Serial-Output Shift Register with 3-State Output
• Manufacturer: ONSEMI [ON Semiconductor]

LR = latch register contents
SR = shift register contents
a–h = data at parallel data inputs A–H
D = data (L, H) at serial data input S A
Force output into high
impedance state
Load parallel data into
data latch
Transfer latch contents to
shift register
Contents of input latch
and shift register are
unchanged
Load parallel data into
data latch and shift
register
Shift serial data into shift
register
Load parallel data in data
latch and shift serial data
into shift register
Operation
Output
Enable
H
L
L
L
L
L
L
Parallel Load
Serial Shift/
H
H
H
H
X
L
L
L, H,
L, H,
Latch
Clock
FUNCTION TABLE
http://onsemi.com
Inputs
X
X
MC74HC589A
L, H,
L, H,
Clock
Shift
5
X
X
X
U = remains unchanged
X = don’t care
Z = high impedance
* = depends on Latch Clock input
Serial
Input
S A
X
X
X
X
X
D
D
Parallel
Inputs
A–H
a–h
a–h
a–h
X
X
X
X
Contents
Latch
Data
a–h
a–h
a–h
U
U
X
*
Resulting Function
SR N
SR N
LR N
Contents
SR A = D,
SR A = D,
Register
Shift
a–h
X
U
U
SR N+1
SR N+1
SR N
SR G
SR G
Output
LR H
Q H
U
U
Z
h
SR H
SR H