Mechanical Dimensions & Land Pattern (PLCC-44(16.6x16.6))
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 PLCC-44(16.6x16.6) | Size power & signal trace widths for rated load current following IPC-2221 clearance rules. |
Technical Frequently Asked Questions (FAQ) — PIC16F877-20I/L (PLCC-44(16.6x16.6))
Quick answers covering Pinout, IPC-7351B Land Pattern dimensions, and CAD export formatsWhat is the Pinout and operating voltage specification of PIC16F877-20I/L (PLCC-44(16.6x16.6))?
Manufactured by MICROCHIP, the PIC16F877-20I/L is housed in a PLCC-44(16.6x16.6) package with 44 pins and a 1.27 mm lead pitch, supporting a VCC supply range of 2.0V to 5.5V. Key pins include: 1 (NC: Multiplexed I/O & Peripheral Pin NC (General)), 2 (MCLR/VPP: Multiplexed I/O & Peripheral Pin MCLR/VPP (General)), 3 (RA0/AN0: Multiplexed I/O & Peripheral Pin RA0/AN0 (General)), 4 (RA1/AN1: Multiplexed I/O & Peripheral Pin RA1/AN1 (General)), 5 (RA2/AN2/VREF-: Multiplexed I/O & Peripheral Pin RA2/AN2/VREF- (General)), 6 (RA3/AN3/VREF+: Multiplexed I/O & Peripheral Pin RA3/AN3/VREF+ (General)).
What are the IPC-7351B PCB Footprint dimensions for PIC16F877-20I/L?
Normalized from the official datasheet mechanical drawing per IPC-7351B (Density Level B Nominal), PIC16F877-20I/L (PLCC-44(16.6x16.6)) has a nominal body envelope of 16.60 × 16.60 mm, pitch e = 1.27 mm, and 44 copper pads.
Where can I download KiCad (.kicad_mod, .kicad_sym), Fusion 360 (.lbr), and 3D STEP models for PIC16F877-20I/L?
You can download the verified open-hardware (CERN-OHL-P-2.0) CAD library bundle for PIC16F877-20I/L (MICROCHIP, PLCC-44(16.6x16.6)) 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 (44 pins) & PIC16F877 Family VariantsExpand static table
| Pin # | Signal Name | Electrical Type | Functional Description & Design Notes |
|---|---|---|---|
| 1 | NC | NC | Signal terminal NC (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 2 | MCLR/VPP | Digital_IO | Signal terminal MCLR/VPP (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: MCLR/VPP. Supported peripheral buses: General. |
| 3 | RA0/AN0 | Digital_IO | Signal terminal RA0/AN0 (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: RA0/AN0. Supported peripheral buses: General. |
| 4 | RA1/AN1 | Digital_IO | Signal terminal RA1/AN1 (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: RA1/AN1. Supported peripheral buses: General. |
| 5 | RA2/AN2/VREF- | Analog | Signal terminal RA2/AN2/VREF- (Analog, 2.0V to 5.5V domain). Multiplexed alternate functions: RA2/AN2/VREF-. Supported peripheral buses: General. |
| 6 | RA3/AN3/VREF+ | Analog | Signal terminal RA3/AN3/VREF+ (Analog, 2.0V to 5.5V domain). Multiplexed alternate functions: RA3/AN3/VREF+. Supported peripheral buses: General. |
| 7 | RA4/T0CKI | Digital_IO | Signal terminal RA4/T0CKI (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: RA4/T0CKI. Supported peripheral buses: General. |
| 8 | RA5/AN4/SS | Digital_IO | Signal terminal RA5/AN4/SS (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: RA5/AN4/SS. Supported peripheral buses: General. |
| 9 | RE0/AN5/RD | Digital_IO | Signal terminal RE0/AN5/RD (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: RE0/AN5/RD. Supported peripheral buses: General. |
| 10 | RE1/AN6/WR | Digital_IO | Signal terminal RE1/AN6/WR (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: RE1/AN6/WR. Supported peripheral buses: General. |
| 11 | RE2/AN7/CS | Digital_IO | Signal terminal RE2/AN7/CS (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: RE2/AN7/CS. Supported peripheral buses: General. |
| 12 | VDD | Power_In | Primary positive power supply input (VDD) operating in the 2.0V to 5.5V domain (Max rating: 5.5V). |
| 13 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| 14 | OSC1/CLKIN | Digital_IO | Signal terminal OSC1/CLKIN (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: OSC1/CLKIN. Supported peripheral buses: RTC/CLK. |
| 15 | OSC2/CLKOUT | Digital_IO | Signal terminal OSC2/CLKOUT (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: OSC2/CLKOUT. Supported peripheral buses: RTC/CLK. |
| 16 | RC0/T1OSO/T1CKI | Digital_IO | Signal terminal RC0/T1OSO/T1CKI (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: RC0/T1OSO/T1CKI. Supported peripheral buses: General. |
| 17 | NC | NC | Signal terminal NC (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 18 | STATUS | Digital_IO | Signal terminal STATUS (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: STATUS. Supported peripheral buses: General. |
| 19 | OPTION_REG | Digital_IO | Signal terminal OPTION_REG (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: OPTION_REG. Supported peripheral buses: General. |
| 20 | INTCON | Digital_IO | Signal terminal INTCON (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: INTCON. Supported peripheral buses: General. |
| 21 | PIE1 | Digital_IO | Signal terminal PIE1 (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: PIE1. Supported peripheral buses: General. |
| 22 | PIR1 | Digital_IO | Signal terminal PIR1 (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: PIR1. Supported peripheral buses: General. |
| 23 | PIE2 | Digital_IO | Signal terminal PIE2 (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: PIE2. Supported peripheral buses: General. |
| 24 | PIR2 | Digital_IO | Signal terminal PIR2 (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: PIR2. Supported peripheral buses: General. |
| 25 | PCON | Digital_IO | Signal terminal PCON (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: PCON. Supported peripheral buses: General. |
| 26 | PCLATH | Digital_IO | Signal terminal PCLATH (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: PCLATH. Supported peripheral buses: General. |
| 27 | FSR | Digital_IO | Signal terminal FSR (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: FSR. Supported peripheral buses: General. |
| 28 | NC | NC | Signal terminal NC (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 29 | TRISA | Digital_IO | Signal terminal TRISA (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: TRISA. Supported peripheral buses: General. |
| 30 | RD4/PSP4 | Digital_IO | Signal terminal RD4/PSP4 (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: RD4/PSP4. Supported peripheral buses: General. |
| 31 | TRISB | Digital_IO | Signal terminal TRISB (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: TRISB. Supported peripheral buses: General. |
| 32 | RD6/PSP6 | Digital_IO | Signal terminal RD6/PSP6 (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: RD6/PSP6. Supported peripheral buses: General. |
| 33 | TRISC | Digital_IO | Signal terminal TRISC (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: TRISC. Supported peripheral buses: General. |
| 34 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| 35 | TRISD | Digital_IO | Signal terminal TRISD (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: TRISD. Supported peripheral buses: General. |
| 36 | PORTE | Digital_IO | Signal terminal PORTE (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: PORTE. Supported peripheral buses: General. |
| 37 | TRISE | Digital_IO | Signal terminal TRISE (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: TRISE. Supported peripheral buses: General. |
| 38 | RB2 | Digital_IO | Signal terminal RB2 (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: RB2. Supported peripheral buses: General. |
| 39 | RB3/PGM | Digital_IO | Signal terminal RB3/PGM (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: RB3/PGM. Supported peripheral buses: General. |
| 40 | NC | NC | Signal terminal NC (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 41 | EECON2 | Digital_IO | Signal terminal EECON2 (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: EECON2. Supported peripheral buses: General. |
| 42 | EECON1 | Digital_IO | Signal terminal EECON1 (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: EECON1. Supported peripheral buses: General. |
| 43 | RB6/PGC | Digital_IO | Signal terminal RB6/PGC (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: RB6/PGC. Supported peripheral buses: General. |
| 44 | RB7/PGD | Digital_IO | Signal terminal RB7/PGD (I/O, 2.0V to 5.5V domain). Multiplexed alternate functions: RB7/PGD. Supported peripheral buses: General. |













