74HC595 - 8-Bit Shift Registers With 3-State Output Registers
QB |
1 |
16 |
VCC |
QC |
2 |
15 |
QA |
QD |
3 |
14 |
SER |
QE |
4 |
13 |
OE |
QF |
5 |
12 |
RCLK |
QG |
6 |
11 |
SRCLK |
QH |
7 |
10 |
SRCLR |
GND |
8 |
9 |
QH' |
- VCC
- Positive voltage (commonly 5V or 3.3V)
- GND
- Ground
- QA – QH
- Shift register output after latch
- QH'
- Shift register output of the last bit, before latching. Used to daisy-chain to SER input of next shift register
- OE
- Output enable
- SER
- Serial input data
- SRCLK
- Serial input clock
- RCLK
- Serial input clock
- SRCLR
- Shift register clear