Mechanical Dimensions & Land Pattern (SSOP-28-208mil)
Extracted from Datasheet & IPC-7351B NormalizedRecommended Companion BOM & Drop-In Equivalents
Passive external components per reference schematic and 1:1 pin-compatible alternatives| Designator / Replacement MPN | Value / Package | Function & PCB Layout Rule |
|---|---|---|
| N/A BOM | Per application circuit SSOP-28-208mil | Size power & signal trace widths for rated load current following IPC-2221 clearance rules. |
Technical Frequently Asked Questions (FAQ) — FT232RL-REEL (SSOP-28-208mil)
Quick answers covering Pinout, IPC-7351B Land Pattern dimensions, and CAD export formatsWhat is the Pinout and operating voltage specification of FT232RL-REEL (SSOP-28-208mil)?
Manufactured by FTDI, the FT232RL-REEL is housed in a SSOP-28-208mil package with 28 pins and a 0.65 mm lead pitch, supporting a VCC supply range of 3.3 - 5.25 V. Key pins include: 1 (TXD: Multiplexed I/O & Peripheral Pin TXD (UART)), 2 (DTR: Multiplexed I/O & Peripheral Pin DTR (UART)), 3 (RTS: Multiplexed I/O & Peripheral Pin RTS (UART)), 4 (VCCIO: Power Supply Input (VCCIO — 3.3 - 5.25 V)), 5 (RXD: Multiplexed I/O & Peripheral Pin RXD (UART)), 6 (RI: Multiplexed I/O & Peripheral Pin RI (General)).
What are the IPC-7351B PCB Footprint dimensions for FT232RL-REEL?
Normalized from the official datasheet mechanical drawing per IPC-7351B (Density Level B Nominal), FT232RL-REEL (SSOP-28-208mil) has a nominal body envelope of 5.30 × 10.20 mm, pitch e = 0.65 mm, and 28 copper pads.
Where can I download KiCad (.kicad_mod, .kicad_sym), Fusion 360 (.lbr), and 3D STEP models for FT232RL-REEL?
You can download the verified open-hardware (CERN-OHL-P-2.0) CAD library bundle for FT232RL-REEL (FTDI, SSOP-28-208mil) directly on this page, including KiCad 8 Footprints (.kicad_mod), Schematic Symbols (.kicad_sym), Autodesk Fusion 360 / Eagle (.lbr), and 3D STEP AP214 / WebGL GLB models.
Static Reference Appendix: Pinout Table (28 pins) & FT232 Family VariantsExpand static table
| Pin # | Signal Name | Electrical Type | Functional Description & Design Notes |
|---|---|---|---|
| 1 | TXD | Digital_IO | Signal terminal TXD (I/O, 3.3 - 5.25 V domain). Multiplexed alternate functions: TXD. Supported peripheral buses: UART. |
| 2 | DTR | Digital_IO | Signal terminal DTR (I/O, 3.3 - 5.25 V domain). Multiplexed alternate functions: DTR. Supported peripheral buses: UART. |
| 3 | RTS | Digital_IO | Signal terminal RTS (I/O, 3.3 - 5.25 V domain). Multiplexed alternate functions: RTS. Supported peripheral buses: UART. |
| 4 | VCCIO | Power_In | Primary positive power supply input (VCCIO) operating in the 3.3 - 5.25 V domain (Max rating: 5.25V). |
| 5 | RXD | Digital_IO | Signal terminal RXD (I/O, 3.3 - 5.25 V domain). Multiplexed alternate functions: RXD. Supported peripheral buses: UART. |
| 6 | RI | Digital_IO | Signal terminal RI (I/O, 3.3 - 5.25 V domain). Multiplexed alternate functions: RI. Supported peripheral buses: General. |
| 7 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 8 | NC | Digital_IO | Signal terminal NC (I/O, 3.3 - 5.25 V domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 9 | DSR | Digital_IO | Signal terminal DSR (I/O, 3.3 - 5.25 V domain). Multiplexed alternate functions: DSR. Supported peripheral buses: UART. |
| 10 | DCD | Digital_IO | Signal terminal DCD (I/O, 3.3 - 5.25 V domain). Multiplexed alternate functions: DCD. Supported peripheral buses: General. |
| 11 | CTS | Digital_IO | Signal terminal CTS (I/O, 3.3 - 5.25 V domain). Multiplexed alternate functions: CTS. Supported peripheral buses: UART. |
| 12 | CBUS4 | Digital_IO | Signal terminal CBUS4 (I/O, 3.3 - 5.25 V domain). Multiplexed alternate functions: CBUS4. Supported peripheral buses: General. |
| 13 | CBUS2 | Digital_IO | Signal terminal CBUS2 (I/O, 3.3 - 5.25 V domain). Multiplexed alternate functions: CBUS2. Supported peripheral buses: General. |
| 14 | CBUS3 | Digital_IO | Signal terminal CBUS3 (I/O, 3.3 - 5.25 V domain). Multiplexed alternate functions: CBUS3. Supported peripheral buses: General. |
| 15 | USBDP | Digital_IO | Signal terminal USBDP (I/O, 3.3 - 5.25 V domain). Multiplexed alternate functions: USBDP. Supported peripheral buses: USB. |
| 16 | USBDM | Digital_IO | Signal terminal USBDM (I/O, 3.3 - 5.25 V domain). Multiplexed alternate functions: USBDM. Supported peripheral buses: USB. |
| 17 | 3V3OUT | Power_In | Primary positive power supply input (3V3OUT) operating in the 3.3 - 5.25 V domain (Max rating: 5.25V). |
| 18 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 19 | RESET | Digital_IO | Active-low hardware reset terminal (RESET): pulling this pin Low resets the processor core and peripherals. |
| 20 | VCC | Power_In | Primary positive power supply input (VCC) operating in the 3.3 - 5.25 V domain (Max rating: 5.25V). |
| 21 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 22 | CBUS1 | Digital_IO | Signal terminal CBUS1 (I/O, 3.3 - 5.25 V domain). Multiplexed alternate functions: CBUS1. Supported peripheral buses: General. |
| 23 | CBUS0 | Digital_IO | Signal terminal CBUS0 (I/O, 3.3 - 5.25 V domain). Multiplexed alternate functions: CBUS0. Supported peripheral buses: General. |
| 24 | NC | Digital_IO | Signal terminal NC (I/O, 3.3 - 5.25 V domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 25 | AGND | GND | 0V electrical ground return terminal (AGND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 26 | TEST | Digital_IO | Signal terminal TEST (I/O, 3.3 - 5.25 V domain). Multiplexed alternate functions: TEST. Supported peripheral buses: General. |
| 27 | OSCI | Digital_IO | Signal terminal OSCI (I/O, 3.3 - 5.25 V domain). Multiplexed alternate functions: OSCI. Supported peripheral buses: RTC/CLK. |
| 28 | OSCO | Digital_IO | Signal terminal OSCO (I/O, 3.3 - 5.25 V domain). Multiplexed alternate functions: OSCO. Supported peripheral buses: RTC/CLK. |











