Texas Instruments
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8-bit serial-in, parallel-out shift register with output latch. The standard way to turn three microcontroller pins into eight outputs, and they chain.
| Part number | 74HC595 |
|---|---|
| Manufacturer | Texas Instruments |
| Category | Integrated Circuits › Shift Registers |
| Package | DIP-16 |
| Pins | 16 |
| Resolution | 8 bit |
74HC595 pinout
| Pin | Name | Type | Description |
|---|---|---|---|
| 1 | Q1 | output | Parallel output 1 |
| 2 | Q2 | output | Parallel output 2 |
| 3 | Q3 | output | Parallel output 3 |
| 4 | Q4 | output | Parallel output 4 |
| 5 | Q5 | output | Parallel output 5 |
| 6 | Q6 | output | Parallel output 6 |
| 7 | Q7 | output | Parallel output 7 |
| 8 | GND | ground | Ground |
| 9 | Q7S | output | Serial out to the next device |
| 10 | MR | input | Master reset, active low — tie high |
| 11 | SHCP | input | Shift register clock |
| 12 | STCP | input | Storage register clock (latch) |
| 13 | OE | input | Output enable, active low — tie low |
| 14 | DS | input | Serial data in |
| 15 | Q0 | output | Parallel output 0 |
| 16 | VCC | power | Supply, 2–6V |
Schematic symbol and footprint
Schematic symbol
Footprint: DIP-16 — to scale, pad 1 in yellow (mm). Check against the datasheet before ordering PCBs.