74vhc595 Fairchild Semiconductor, 74vhc595 Datasheet - Page 2

• Manufacturer Part Number: 74vhc595
• Description: 8-bit Shift Register With Output Latches
• Manufacturer: Fairchild Semiconductor

www.fairchildsemi.com
Pin Descriptions
Timing Diagram
Pin Names
SER
SCK
RCK
SCLR
G
Q
Q’
A
H
- Q
H
Serial Data Input
Shift Register Clock Input
(Active rising edge)
Storage Register Clock Input
(Active rising edge)
Reset Input
3-STATE Output Enable Input
(Active LOW)
Parallel Data Outputs
Serial Data Output
Description
2
Truth Table
SER RCK SCK SCLR G
H
X
X
X
X
L
X
X
X
X
X
Inputs
X
X
X
X
H
H
H
X
X
L
H Q
L Q
L Shift Register cleared
L Shift Register clocked
L Shift Register clocked
L Contents of Shift
Register transferred to
output latches
A
A
Q
Q
Q
thru Q
thru Q
N
N
H
Q
Q
Function
n-1
n-1
H
H
3-STATE
outputs enabled
, Q
, Q
0
0
SER
SER
L
H