74HC594 Philips, 74HC594 Datasheet - Page 4

• Manufacturer Part Number: 74HC594
• Description: 8-bit shift register with output register
• Manufacturer: Philips

Philips Semiconductors
FUNCTION TABLE
Note
1. H = HIGH voltage level
December 1991
X
X
X
X
SH
8-bit shift register with output register
L = LOW voltage level
NC = no change
X = don’t care.
CP
= LOW-to-HIGH transition
X
X
X
ST
CP
INPUTS
L
X
L
H
H
H
SH
R
X
L
H
H
H
X
ST
R
handbook, halfpage
X
X
X
H
X
X
D
S
14
10
12
13
11
L
NC
L
Q
NC
Q
OUTPUTS
Q
SH R
6
6
D S
SH CP
ST R
ST CP
7
’
n
’
Fig.4 Functional diagram.
NC
L
L
NC
Q
Q
Q
n
n
’
’
n
8-BIT STORAGE REGISTER
8-STAGE SHIFT REGISTER
Q 0 Q 1 Q 2 Q 3 Q 4 Q 5 Q 6 Q 7
15
a LOW level on SH
a LOW level on ST
empty shift register loaded into storage register.
logic HIGH level shifted into shift register stage 0. Contents of all
shift register stages shifted through, e.g. previous state of stage
6 (internal Q
contents of shift register stages (internal Q
the storage register and parallel output stages.
contents of shift register shifted through. Previous contents of
shift register transferred to the storage register and the parallel
output stages.
1
2
4
3
4
6
5
’) appears on the serial output (Q
6
R
7
R
only affects the storage registers.
only affects the shift registers.
Q 7 '
MBC320
FUNCTION
9
74HC/HCT594
n
’) are transferred to
Product specification
7
’).