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) — PIC18F24K20-I/SS (SSOP-28-208mil)
Quick answers covering Pinout, IPC-7351B Land Pattern dimensions, and CAD export formatsWhat is the Pinout and operating voltage specification of PIC18F24K20-I/SS (SSOP-28-208mil)?
Manufactured by MICROCHIP, the PIC18F24K20-I/SS is housed in a SSOP-28-208mil package with 28 pins and a 0.65 mm lead pitch, supporting a VCC supply range of 1.8V to 3.6V. Key pins include: 1 (MCLR#/VPP/RE3: Multiplexed I/O & Peripheral Pin MCLR#/VPP/RE3 (General)), 2 (AN0/C12IN0-/RA0: Multiplexed I/O & Peripheral Pin AN0/C12IN0-/RA0 (General)), 3 (AN1/C12IN1-/RA1: Multiplexed I/O & Peripheral Pin AN1/C12IN1-/RA1 (General)), 4 (NC: No Connect (Leave Floating)), 5 (AN3/VREF+/C1IN+/RA3: Multiplexed I/O & Peripheral Pin AN3/VREF+/C1IN+/RA3 (General)), 6 (T0CKI/C1OUT/RA4: Multiplexed I/O & Peripheral Pin T0CKI/C1OUT/RA4 (General)).
What are the IPC-7351B PCB Footprint dimensions for PIC18F24K20-I/SS?
Normalized from the official datasheet mechanical drawing per IPC-7351B (Density Level B Nominal), PIC18F24K20-I/SS (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 PIC18F24K20-I/SS?
You can download the verified open-hardware (CERN-OHL-P-2.0) CAD library bundle for PIC18F24K20-I/SS (MICROCHIP, 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) & PIC18F24K20 Family VariantsExpand static table
| Pin # | Signal Name | Electrical Type | Functional Description & Design Notes |
|---|---|---|---|
| 1 | MCLR#/VPP/RE3 | Digital_IO | Signal terminal MCLR#/VPP/RE3 (I/O, 1.8V to 3.6V domain). Multiplexed alternate functions: MCLR#/VPP/RE3. Supported peripheral buses: General. |
| 2 | AN0/C12IN0-/RA0 | Digital_IO | Signal terminal AN0/C12IN0-/RA0 (I/O, 1.8V to 3.6V domain). Multiplexed alternate functions: AN0/C12IN0-/RA0. Supported peripheral buses: General. |
| 3 | AN1/C12IN1-/RA1 | Digital_IO | Signal terminal AN1/C12IN1-/RA1 (I/O, 1.8V to 3.6V domain). Multiplexed alternate functions: AN1/C12IN1-/RA1. Supported peripheral buses: General. |
| 4 | NC | No_Connect | No Connect (Leave Floating) |
| 5 | AN3/VREF+/C1IN+/RA3 | Analog | Signal terminal AN3/VREF+/C1IN+/RA3 (Analog, 1.8V to 3.6V domain). Multiplexed alternate functions: AN3/VREF+/C1IN+/RA3. Supported peripheral buses: General. |
| 6 | T0CKI/C1OUT/RA4 | Digital_IO | Signal terminal T0CKI/C1OUT/RA4 (I/O, 1.8V to 3.6V domain). Multiplexed alternate functions: T0CKI/C1OUT/RA4. Supported peripheral buses: General. |
| 7 | NC | No_Connect | No Connect (Leave Floating) |
| 8 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| 9 | OSC1/CLKIN/RA7 | Digital_IO | Signal terminal OSC1/CLKIN/RA7 (I/O, 1.8V to 3.6V domain). Multiplexed alternate functions: OSC1/CLKIN/RA7. Supported peripheral buses: RTC/CLK. |
| 10 | OSC2/CLKOUT/RA6 | Digital_IO | Signal terminal OSC2/CLKOUT/RA6 (I/O, 1.8V to 3.6V domain). Multiplexed alternate functions: OSC2/CLKOUT/RA6. Supported peripheral buses: RTC/CLK. |
| 11 | T1OSO/T13CKI/RC0 | Digital_IO | Signal terminal T1OSO/T13CKI/RC0 (I/O, 1.8V to 3.6V domain). Multiplexed alternate functions: T1OSO/T13CKI/RC0. Supported peripheral buses: General. |
| 12 | T1OSI/CCP2(1)/RC1 | Digital_IO | Signal terminal T1OSI/CCP2(1)/RC1 (I/O, 1.8V to 3.6V domain). Multiplexed alternate functions: T1OSI/CCP2(1)/RC1. Supported peripheral buses: General. |
| 13 | CCP1/P1A/RC2 | Digital_IO | Signal terminal CCP1/P1A/RC2 (I/O, 1.8V to 3.6V domain). Multiplexed alternate functions: CCP1/P1A/RC2. Supported peripheral buses: General. |
| 14 | SCK/SCL/RC3 | Digital_IO | Signal terminal SCK/SCL/RC3 (I/O, 1.8V to 3.6V domain). Multiplexed alternate functions: SCK/SCL/RC3. Supported peripheral buses: SPI, I2C. |
| 15 | RC4/SDI/SDA | Digital_IO | Signal terminal RC4/SDI/SDA (I/O, 1.8V to 3.6V domain). Multiplexed alternate functions: RC4/SDI/SDA. Supported peripheral buses: I2C. |
| 16 | RC5/SDO | Digital_IO | Signal terminal RC5/SDO (I/O, 1.8V to 3.6V domain). Multiplexed alternate functions: RC5/SDO. Supported peripheral buses: General. |
| 17 | RC6/TX/CK | Digital_IO | Signal terminal RC6/TX/CK (I/O, 1.8V to 3.6V domain). Multiplexed alternate functions: RC6/TX/CK. Supported peripheral buses: General. |
| 18 | RC7/RX/DT | Digital_IO | Signal terminal RC7/RX/DT (I/O, 1.8V to 3.6V domain). Multiplexed alternate functions: RC7/RX/DT. 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 1.8V to 3.6V domain (Max rating: 3.6V). |
| 21 | RB0/INT0/FLT0/AN12 | Digital_IO | Signal terminal RB0/INT0/FLT0/AN12 (I/O, 1.8V to 3.6V domain). Multiplexed alternate functions: RB0/INT0/FLT0/AN12. Supported peripheral buses: General. |
| 22 | IO11 | Digital_IO | GPIO11 / RTC_GPIO11 / TOUCH11 / ADC2_CH0 / FSPID |
| 23 | RB2/INT2/AN8/P1B | Digital_IO | Signal terminal RB2/INT2/AN8/P1B (I/O, 1.8V to 3.6V domain). Multiplexed alternate functions: RB2/INT2/AN8/P1B. Supported peripheral buses: General. |
| 24 | IO13 | Digital_IO | GPIO13 / RTC_GPIO13 / TOUCH13 / ADC2_CH2 / FSPIQ |
| 25 | RB4/KBI0/AN11/P1D | Digital_IO | Signal terminal RB4/KBI0/AN11/P1D (I/O, 1.8V to 3.6V domain). Multiplexed alternate functions: RB4/KBI0/AN11/P1D. Supported peripheral buses: General. |
| 26 | RB5/KBI1/PGM | Digital_IO | Signal terminal RB5/KBI1/PGM (I/O, 1.8V to 3.6V domain). Multiplexed alternate functions: RB5/KBI1/PGM. Supported peripheral buses: General. |
| 27 | RB6//KBI2/PGC | Digital_IO | Signal terminal RB6//KBI2/PGC (I/O, 1.8V to 3.6V domain). Multiplexed alternate functions: RB6//KBI2/PGC. Supported peripheral buses: General. |
| 28 | RB7/KBI3/PGD | Digital_IO | Signal terminal RB7/KBI3/PGD (I/O, 1.8V to 3.6V domain). Multiplexed alternate functions: RB7/KBI3/PGD. Supported peripheral buses: General. |










