FTDI
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USB to UART bridge with well-supported drivers on every platform. More expensive than a CH340 and more reliable.
| Part number | FT232RL |
|---|---|
| Manufacturer | FTDI |
| Category | Integrated Circuits › USB & UART Bridge ICs |
| Package | SSOP-28 |
| Pins | 28 |
FT232RL pinout
| Pin | Name | Type | Description |
|---|---|---|---|
| 1 | TXD | output | UART transmit |
| 2 | DTR | output | Data terminal ready |
| 3 | RTS | output | Request to send |
| 4 | VCCIO | power | I/O supply, 1.8–5.25V |
| 5 | RXD | input | UART receive |
| 6 | RI | input | Ring indicator |
| 7 | GND | ground | Ground |
| 8 | NC | nc | Not connected |
| 9 | DSR | input | Data set ready |
| 10 | DCD | input | Carrier detect |
| 11 | CTS | input | Clear to send |
| 12 | CBUS4 | bidirectional | Configurable I/O |
| 13 | CBUS2 | bidirectional | Configurable I/O |
| 14 | CBUS3 | bidirectional | Configurable I/O |
| 15 | USBDP | bidirectional | USB D+ |
| 16 | USBDM | bidirectional | USB D- |
| 17 | 3V3OUT | power out | Internal 3.3V regulator output |
| 18 | GND | ground | Ground |
| 19 | RESET | input | Reset, active low |
| 20 | VCC | power | Supply, 3.3–5.25V |
| 21 | GND | ground | Ground |
| 22 | CBUS1 | bidirectional | Configurable I/O |
| 23 | CBUS0 | bidirectional | Configurable I/O |
| 24 | NC | nc | Not connected |
| 25 | AGND | ground | Analog ground |
| 26 | TEST | input | Test — tie to ground |
| 27 | OSCI | clock | Oscillator in |
| 28 | OSCO | clock | Oscillator out |
Schematic symbol and footprint
Schematic symbol
Footprint: SSOP-28 — to scale, pad 1 in yellow (mm). Check against the datasheet before ordering PCBs.