Diodes 74HC594 - Manual (Page 2)

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