Mechanical Dimensions & Land Pattern (SOIC-28-300mil)
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 SOIC-28-300mil | Size power & signal trace widths for rated load current following IPC-2221 clearance rules. |
Technical Frequently Asked Questions (FAQ) — PIC18F23K22-I/SO (SOIC-28-300mil)
Quick answers covering Pinout, IPC-7351B Land Pattern dimensions, and CAD export formatsWhat is the Pinout and operating voltage specification of PIC18F23K22-I/SO (SOIC-28-300mil)?
Manufactured by MICROCHIP, the PIC18F23K22-I/SO is housed in a SOIC-28-300mil package with 28 pins and a 1.27 mm lead pitch, supporting a VCC supply range of 2.3V to 5.5V. Key pins include: 1 (SCL2: Multiplexed I/O & Peripheral Pin SCL2 (I2C)), 2 (SDA2: Multiplexed I/O & Peripheral Pin SDA2 (I2C)), 3 (SDO2: Multiplexed I/O & Peripheral Pin SDO2 (General)), 4 (P1D: Multiplexed I/O & Peripheral Pin P1D (General)), 5 (CCP3: Multiplexed I/O & Peripheral Pin CCP3 (General)), 6 (PGC: Multiplexed I/O & Peripheral Pin PGC (RTC/CLK)).
What are the IPC-7351B PCB Footprint dimensions for PIC18F23K22-I/SO?
Normalized from the official datasheet mechanical drawing per IPC-7351B (Density Level B Nominal), PIC18F23K22-I/SO (SOIC-28-300mil) has a nominal body envelope of 7.50 × 17.90 mm, pitch e = 1.27 mm, and 28 copper pads.
Where can I download KiCad (.kicad_mod, .kicad_sym), Fusion 360 (.lbr), and 3D STEP models for PIC18F23K22-I/SO?
You can download the verified open-hardware (CERN-OHL-P-2.0) CAD library bundle for PIC18F23K22-I/SO (MICROCHIP, SOIC-28-300mil) 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) & PIC18F23K22 Family VariantsExpand static table
| Pin # | Signal Name | Electrical Type | Functional Description & Design Notes |
|---|---|---|---|
| 1 | SCL2 | Digital_IO | Signal terminal SCL2 (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: SCL2. Supported peripheral buses: I2C. |
| 2 | SDA2 | Digital_IO | Signal terminal SDA2 (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: SDA2. Supported peripheral buses: I2C. |
| 3 | SDO2 | Digital_IO | Signal terminal SDO2 (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: SDO2. Supported peripheral buses: General. |
| 4 | P1D | Digital_IO | Signal terminal P1D (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: P1D. Supported peripheral buses: General. |
| 5 | CCP3 | Digital_IO | Signal terminal CCP3 (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: CCP3. Supported peripheral buses: General. |
| 6 | PGC | Digital_IO | Signal terminal PGC (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: PGC. Supported peripheral buses: RTC/CLK. |
| 7 | RA5 | Digital_IO | Signal terminal RA5 (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: RA5. Supported peripheral buses: General. |
| 8 | Vss | GND | 0V electrical ground return terminal (Vss) for internal core logic, I/O drivers, and analog sub-blocks. |
| 9 | RA7 | Digital_IO | Signal terminal RA7 (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: RA7. Supported peripheral buses: General. |
| 10 | RA6 | Digital_IO | Signal terminal RA6 (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: RA6. Supported peripheral buses: General. |
| 11 | RC0 | Digital_IO | Signal terminal RC0 (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: RC0. Supported peripheral buses: General. |
| 12 | RC1 | Digital_IO | Signal terminal RC1 (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: RC1. Supported peripheral buses: General. |
| 13 | RC2 | Digital_IO | Signal terminal RC2 (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: RC2. Supported peripheral buses: General. |
| 14 | RC3 | Digital_IO | Signal terminal RC3 (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: RC3. Supported peripheral buses: General. |
| 15 | RC4 | Digital_IO | Signal terminal RC4 (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: RC4. Supported peripheral buses: General. |
| 16 | RC5 | Digital_IO | Signal terminal RC5 (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: RC5. Supported peripheral buses: General. |
| 17 | RC6 | Digital_IO | Signal terminal RC6 (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: RC6. Supported peripheral buses: General. |
| 18 | RC7 | Digital_IO | Signal terminal RC7 (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: RC7. Supported peripheral buses: General. |
| 19 | Vss | GND | 0V electrical ground return terminal (Vss) for internal core logic, I/O drivers, and analog sub-blocks. |
| 20 | Vdd | Power_In | Primary positive power supply input (Vdd) operating in the 2.3V to 5.5V domain (Max rating: 5.5V). |
| 21 | RB0 | Digital_IO | Signal terminal RB0 (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: RB0. Supported peripheral buses: General. |
| 22 | RB1 | Digital_IO | Signal terminal RB1 (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: RB1. Supported peripheral buses: General. |
| 23 | RB2 | Digital_IO | Signal terminal RB2 (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: RB2. Supported peripheral buses: General. |
| 24 | RB3 | Digital_IO | Signal terminal RB3 (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: RB3. Supported peripheral buses: General. |
| 25 | RB4 | Digital_IO | Signal terminal RB4 (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: RB4. Supported peripheral buses: General. |
| 26 | RB5 | Digital_IO | Signal terminal RB5 (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: RB5. Supported peripheral buses: General. |
| 27 | RB6/PGC | Digital_IO | Signal terminal RB6/PGC (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: RB6/PGC. Supported peripheral buses: General. |
| 28 | RB7/PGD | Digital_IO | Signal terminal RB7/PGD (I/O, 2.3V to 5.5V domain). Multiplexed alternate functions: RB7/PGD. Supported peripheral buses: General. |














