Mechanical Dimensions & Land Pattern (SOIC-18-300mil)
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-18-300mil | Size power & signal trace widths for rated load current following IPC-2221 clearance rules. |
Technical Frequently Asked Questions (FAQ) — PIC16F628-04/SO (SOIC-18-300mil)
Quick answers covering Pinout, IPC-7351B Land Pattern dimensions, and CAD export formatsWhat is the Pinout and operating voltage specification of PIC16F628-04/SO (SOIC-18-300mil)?
Manufactured by MICROCHIP, the PIC16F628-04/SO is housed in a SOIC-18-300mil package with 18 pins and a 1.27 mm lead pitch, supporting a VCC supply range of 3.0V to 5.5V. Key pins include: 1 (RA2/AN2/VREF: Multiplexed I/O & Peripheral Pin RA2/AN2/VREF (General)), 2 (RA3/AN3/CMP1: Multiplexed I/O & Peripheral Pin RA3/AN3/CMP1 (General)), 3 (RA4/TOCKI/CMP2: Multiplexed I/O & Peripheral Pin RA4/TOCKI/CMP2 (General)), 4 (RA5/MCLR/VPP: Multiplexed I/O & Peripheral Pin RA5/MCLR/VPP (General)), 5 (VSS: Ground Reference Pin (VSS)), 6 (RB0/INT: Multiplexed I/O & Peripheral Pin RB0/INT (General)).
What are the IPC-7351B PCB Footprint dimensions for PIC16F628-04/SO?
Normalized from the official datasheet mechanical drawing per IPC-7351B (Density Level B Nominal), PIC16F628-04/SO (SOIC-18-300mil) has a nominal body envelope of 7.50 × 11.55 mm, pitch e = 1.27 mm, and 18 copper pads.
Where can I download KiCad (.kicad_mod, .kicad_sym), Fusion 360 (.lbr), and 3D STEP models for PIC16F628-04/SO?
You can download the verified open-hardware (CERN-OHL-P-2.0) CAD library bundle for PIC16F628-04/SO (MICROCHIP, SOIC-18-300mil) 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 (18 pins) & PIC16F628 Family VariantsExpand static table
| Pin # | Signal Name | Electrical Type | Functional Description & Design Notes |
|---|---|---|---|
| 1 | RA2/AN2/VREF | Analog | Signal terminal RA2/AN2/VREF (Analog, 3.0V to 5.5V domain). Multiplexed alternate functions: RA2/AN2/VREF. Supported peripheral buses: General. |
| 2 | RA3/AN3/CMP1 | Digital_IO | Signal terminal RA3/AN3/CMP1 (I/O, 3.0V to 5.5V domain). Multiplexed alternate functions: RA3/AN3/CMP1. Supported peripheral buses: General. |
| 3 | RA4/TOCKI/CMP2 | Digital_IO | Signal terminal RA4/TOCKI/CMP2 (I/O, 3.0V to 5.5V domain). Multiplexed alternate functions: RA4/TOCKI/CMP2. Supported peripheral buses: General. |
| 4 | RA5/MCLR/VPP | Digital_IO | Signal terminal RA5/MCLR/VPP (I/O, 3.0V to 5.5V domain). Multiplexed alternate functions: RA5/MCLR/VPP. Supported peripheral buses: General. |
| 5 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| 6 | RB0/INT | Digital_IO | Signal terminal RB0/INT (I/O, 3.0V to 5.5V domain). Multiplexed alternate functions: RB0/INT. Supported peripheral buses: General. |
| 7 | RB1/RX/DT | Digital_IO | Signal terminal RB1/RX/DT (I/O, 3.0V to 5.5V domain). Multiplexed alternate functions: RB1/RX/DT. Supported peripheral buses: General. |
| 8 | RB2/TX/CK | Digital_IO | Signal terminal RB2/TX/CK (I/O, 3.0V to 5.5V domain). Multiplexed alternate functions: RB2/TX/CK. Supported peripheral buses: General. |
| 9 | RB3/CCP1 | Digital_IO | Signal terminal RB3/CCP1 (I/O, 3.0V to 5.5V domain). Multiplexed alternate functions: RB3/CCP1. Supported peripheral buses: General. |
| 10 | RB4/PGM | Digital_IO | Signal terminal RB4/PGM (I/O, 3.0V to 5.5V domain). Multiplexed alternate functions: RB4/PGM. Supported peripheral buses: General. |
| 11 | RB5 | Digital_IO | Signal terminal RB5 (I/O, 3.0V to 5.5V domain). Multiplexed alternate functions: RB5. Supported peripheral buses: General. |
| 12 | RB6/T1OSO/T1CKI/PGC | Digital_IO | Signal terminal RB6/T1OSO/T1CKI/PGC (I/O, 3.0V to 5.5V domain). Multiplexed alternate functions: RB6/T1OSO/T1CKI/PGC. Supported peripheral buses: General. |
| 13 | RB7/T1OSI/PGD | Digital_IO | Signal terminal RB7/T1OSI/PGD (I/O, 3.0V to 5.5V domain). Multiplexed alternate functions: RB7/T1OSI/PGD. Supported peripheral buses: General. |
| 14 | VDD | Power_In | Primary positive power supply input (VDD) operating in the 3.0V to 5.5V domain (Max rating: 5.5V). |
| 15 | RA6/OSC2/CLKOUT | Digital_IO | Signal terminal RA6/OSC2/CLKOUT (I/O, 3.0V to 5.5V domain). Multiplexed alternate functions: RA6/OSC2/CLKOUT. Supported peripheral buses: RTC/CLK. |
| 16 | RA7/OSC1/CLKIN | Digital_IO | Signal terminal RA7/OSC1/CLKIN (I/O, 3.0V to 5.5V domain). Multiplexed alternate functions: RA7/OSC1/CLKIN. Supported peripheral buses: RTC/CLK. |
| 17 | RA0/AN0 | Digital_IO | Signal terminal RA0/AN0 (I/O, 3.0V to 5.5V domain). Multiplexed alternate functions: RA0/AN0. Supported peripheral buses: General. |
| 18 | RA1/AN1 | Digital_IO | Signal terminal RA1/AN1 (I/O, 3.0V to 5.5V domain). Multiplexed alternate functions: RA1/AN1. Supported peripheral buses: General. |











