74HC594 Datasheet, PDF (2/10 Pages) NXP Semiconductors – 8-bit shift register with output register

Pin Descriptions
Pin Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin Name
Q1
Q2
Q3
Q4
Q5
Q6
Q7
GND
Q7S
SHR
SHCP
STCP
STR
DS
Q0
V_CC
Description
Parallel Data Output 1
Parallel Data Output 2
Parallel Data Output 3
Parallel Data Output 4
Parallel Data Output 5
Parallel Data Output 6
Parallel Data Output 7
Ground
Serial Data Output
Shift Register Reset active low
Shift Register Clock Input
Storage Register Clock Input
Storage Register Reset active low
Serial Data input
Parallel Data Output 0
Supply Voltage
Functional Diagram
Logic Diagram
DS
SHCP
SHR
STCP
STR
STAGE 0
D
Q
FF0
CP
R
STAGES 1 TO 6
D
Q
STAGE 7
D
Q
FF7
CP
R
D
Q
LATCH
CP
R
D
Q
LATCH
CP
R
74HC594
Q0
Q1 Q2 Q3 Q4 Q5 Q6
Q7
74AHC594
Document number: DS35484 Rev. 3 - 2
2 of 10
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June 2013
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