| Pin | Name | Function |
|---|---|---|
| 1 | Q1 | Parallel output 1 |
| 2 | Q2 | Parallel output 2 |
| 3 | Q3 | Parallel output 3 |
| 4 | Q4 | Parallel output 4 |
| 5 | Q5 | Parallel output 5 |
| 6 | Q6 | Parallel output 6 |
| 7 | Q7 | Parallel output 7 |
| 8 | GND | Ground |
| 9 | Q7' (SER OUT) | Serial output, for chaining to next chip |
| 10 | MR | Master reset (active low) |
| 11 | SH_CP | Shift register clock |
| 12 | ST_CP | Storage/latch clock |
| 13 | OE | Output enable (active low) |
| 14 | DS (SER) | Serial data input |
| 15 | Q0 | Parallel output 0 |
| 16 | VCC | Power supply |
Summary
8-bit serial-in, parallel-out shift register. Lets you control 8 output pins (like LEDs or a 7-segment display) using just 3 microcontroller pins — commonly chained together to control many outputs at once.
- Type: 8-bit serial-in, parallel-out shift register
- Supply voltage: 2V - 6V (typically 5V)
- Interface: 3-wire (Data, Clock, Latch)
- Output current: Up to ~35mA per pin