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PIC18F2520-I

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Microchip Tech Microcontrollers (MCU/MPU/SOC), SOIC-28-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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PIC18F2520-I

Microchip Tech · Microcontrollers (MCU/MPU/SOC) · SOIC-28-300mil

PIC18F2520-I from Microchip Tech, in a SOIC-28-300mil. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 MCLR/VPP/RE3 input Master Clear (Reset) input is active-low when MCLRE is set; otherwise pin functions as digital input RE3, and VPP is the programming voltage input.
2 RA0/AN0 bidirectional Digital I/O with TTL input levels, also analog input 0 and comparator C1- input.
3 RA1/AN1 bidirectional Digital I/O with TTL input levels, also analog input 1 and comparator C2- input.
4 RA2/AN2/VREF-/CVREF bidirectional Digital I/O with TTL input levels, also analog input 2, A/D low reference voltage input VREF-, or comparator voltage reference output CVREF.
5 RA3/AN3/VREF+ bidirectional Digital I/O with TTL input levels, also analog input 3 or A/D high reference voltage input VREF+.
6 RA4/T0CKI/C1OUT bidirectional Digital I/O with Schmitt Trigger input, also Timer0 external clock input T0CKI or comparator 1 output C1OUT.
7 RA5/AN4/SS/HLVDIN/C2OUT bidirectional Digital I/O with TTL input levels, also analog input 4, MSSP SPI slave select SS, High/Low-Voltage Detect input HLVDIN, or comparator 2 output C2OUT.
8 VSS power_in Ground reference for logic and I/O pins.
9 OSC1/CLKI/RA7 input Oscillator crystal or external clock input (ST buffer in RC mode, CMOS otherwise); pin becomes general purpose I/O RA7 when not used as an oscillator pin.
10 OSC2/CLKO/RA6 output Oscillator crystal output in crystal modes, CLKO (FOSC/4) in RC and EC modes, or general purpose I/O RA6 in RCIO, INTIO2 and ECIO modes.
11 RC0/T1OSO/T13CKI bidirectional Digital I/O with Schmitt Trigger input, also Timer1 oscillator output T1OSO or Timer1/Timer3 external clock input T13CKI.
12 RC1/T1OSI/CCP2 bidirectional Digital I/O with Schmitt Trigger input, also Timer1 oscillator input T1OSI or CCP2 capture input/compare and PWM output (default CCP2 pin when CCP2MX is set).
13 RC2/CCP1 bidirectional Digital I/O with Schmitt Trigger input, also CCP1 capture input or compare/PWM output.
14 RC3/SCK/SCL bidirectional Digital I/O with Schmitt Trigger input, also MSSP synchronous serial clock SCK (SPI mode) or SCL (I2C mode).
15 RC4/SDI/SDA bidirectional Digital I/O with Schmitt Trigger input, also MSSP SPI data input SDI or I2C data I/O SDA.
16 RC5/SDO bidirectional Digital I/O with Schmitt Trigger input, also MSSP SPI data output SDO.
17 RC6/TX/CK bidirectional Digital I/O with Schmitt Trigger input, also EUSART asynchronous transmit TX or synchronous clock CK.
18 RC7/RX/DT bidirectional Digital I/O with Schmitt Trigger input, also EUSART asynchronous receive RX or synchronous data DT.
19 VSS power_in Ground reference for logic and I/O pins.
20 VDD power_in Positive supply for logic and I/O pins; PIC18F devices operate from 4.2V to 5.5V and PIC18LF devices from 2.0V to 5.5V.
21 RB0/INT0/FLT0/AN12 bidirectional Digital I/O with TTL input and programmable weak pull-up, also external interrupt 0 INT0, Enhanced PWM fault input FLT0, or analog input 12.
22 RB1/INT1/AN10 bidirectional Digital I/O with TTL input and programmable weak pull-up, also external interrupt 1 INT1 or analog input 10.
23 RB2/INT2/AN8 bidirectional Digital I/O with TTL input and programmable weak pull-up, also external interrupt 2 INT2 or analog input 8.
24 RB3/AN9/CCP2 bidirectional Digital I/O with TTL input and programmable weak pull-up, also analog input 9 or CCP2 capture/compare/PWM (alternate CCP2 pin when CCP2MX is cleared).
25 RB4/KBI0/AN11 bidirectional Digital I/O with TTL input and programmable weak pull-up, also interrupt-on-change pin KBI0 or analog input 11.
26 RB5/KBI1/PGM bidirectional Digital I/O with TTL input and programmable weak pull-up, also interrupt-on-change pin KBI1 or low-voltage ICSP programming enable pin PGM.
27 RB6/KBI2/PGC bidirectional Digital I/O with TTL input and programmable weak pull-up, also interrupt-on-change pin KBI2 or in-circuit debugger and ICSP programming clock PGC.
28 RB7/KBI3/PGD bidirectional Digital I/O with TTL input and programmable weak pull-up, also interrupt-on-change pin KBI3 or in-circuit debugger and ICSP programming data PGD.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package SOIC-28-300mil
Category Embedded Processors & Controllers
Pins 28

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply voltage (standard F device, not LF) VDD 4.2 5.5 V Standard Enhanced Flash 'F' device (PIC18F2520, not PIC18LF2520); Section 1.3 10
Operating frequency 40 MHz PIC18F2520 column of Table 1-1, printed as 'DC, 40 MHz' 9
Maximum recommended analog source impedance 2.5 kΩ A/D analog input source impedance, Section 19.1 230
External resistor REXT (RC oscillator) REXT 3 100 kΩ RC oscillator mode, recommended values 27
External capacitor CEXT (RC oscillator) CEXT 20 pF RC oscillator mode, recommended CEXT > 20 pF 27
MCLR pull-up resistor for power-on Reset 1 10 kΩ MCLR tied through resistor to VDD for POR 45
A/D maximum device frequency, TAD = 2 TOSC 2.86 MHz ADCS<2:0> = 000; PIC18F2X20/4X20 column of Table 19-1 231
A/D maximum device frequency, TAD = 4 TOSC 5.71 MHz ADCS<2:0> = 100; PIC18F2X20/4X20 column of Table 19-1 231
A/D maximum device frequency, TAD = 8 TOSC 11.43 MHz ADCS<2:0> = 001; PIC18F2X20/4X20 column of Table 19-1 231
A/D maximum device frequency, TAD = 16 TOSC 22.86 MHz ADCS<2:0> = 101; PIC18F2X20/4X20 column of Table 19-1 231
A/D maximum device frequency, TAD = 32 TOSC 40 MHz ADCS<2:0> = 010; PIC18F2X20/4X20 column of Table 19-1 231
A/D maximum device frequency, TAD = 64 TOSC 40 MHz ADCS<2:0> = 110; PIC18F2X20/4X20 column of Table 19-1 231
A/D maximum device frequency, TAD = internal RC 1 MHz ADCS<2:0> = x11 (RC); PIC18F2X20/4X20 column of Table 19-1; see footnote 1 231

CAD (KiCad official)

  • Symbol: PIC18F2520-I
  • Footprint: Package_SO:SOIC-28W_7.5x17.9mm_P1.27mm
  • 3D model: SOIC-28-300mil (KiCad packages3D, STEP)
  • 3D model files: pic18f2520-i-etched.step / pic18f2520-i-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); pic18f2520-i.step / pic18f2520-i.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Microchip Tech datasheet (412 pp, sha256 7f882378ad20764a, retrieved 2026-10-18, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF