PIC18F2220-I/SP - 8-bit 40MHz 4KB Flash MCU 28-SPDIP | Microchip
MPN: PIC18F2220-I/SP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.5 | $4.50 |
| 10 | $4.05 | $40.50 |
| 100 | $3.6 | $360.00 |
| 500 | $3.2 | $1,600.00 |
| 1,000 | $2.85 | $2,850.00 |
PIC18F2220-I/SP Overview
A microcontroller (MCU) is a single-chip computer containing a CPU, memory (Flash/EEPROM/RAM), and programmable peripherals. The PIC18 family is an enhanced 8-bit Harvard-architecture MCU family widely used in cost-sensitive embedded control, with PIC18F2220 positioned at the small-memory end (4 KB Flash, 256 B EEPROM, 512 B RAM). Within the broader taxonomy: PIC18F2220 -> PIC18 -> PIC -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor.
The PIC18F2220 integrates 10 channels of 10-bit Analog-to-Digital conversion (ADC), two analog comparators, two Capture/Compare/PWM (CCP) modules, and a synchronous serial port configurable as either SPI or I2C. Additional peripherals include an EUSART, two 8-bit timers plus one 16-bit timer, a parallel slave port, self-programming Flash, an ICD debug interface, and nanoWatt power-managed modes that drop supply current below 1 uA in sleep.
Architecturally, the device uses a 16-bit wide instruction word with separate 16-bit instruction and 8-bit data buses, allowing the CPU to fetch an instruction and read data on the same cycle for sustained 40 MIPS throughput. Six power-managed modes, selectable in firmware, switch the system clock between the primary oscillator, the secondary 32 kHz oscillator, and the internal RC oscillator, enabling trade-offs between throughput and consumption. Brown-out reset, watchdog timer, and code-protect bits provide field robustness.
Typical applications include consumer appliance controls, low-cost sensor interfaces, battery-powered instrumentation, LED driver controllers, hobbyist and educational hardware, and industrial control nodes where 4 KB of Flash is sufficient. The wide operating voltage range (2.0 V to 5.5 V) supports both 3.3 V and 5 V rails. Designs requiring serial bootloaders or RS-232 bridging are common given the integrated EUSART.
When designing with the PIC18F2220, observe VDD/VSS decoupling of 0.1 uF at every supply pin and ensure the MCLR pin has the recommended 10 kohm pull-up. Use the ICD interface (PGC/PGD) for in-circuit debug during development. The 28-pin SPDIP footprint also enables through-hole prototyping on breadboards and perforated boards - an advantage over surface-mount-only MCU families.
This page synthesizes distributor pricing, drop-in same-package alternatives from Microchip's own portfolio and competitor cross-references, and practical design notes not found on any single source page. Information is current as of 2026-09-26.
Drop-in alternatives for PIC18F2220-I/SP — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC18F2220-I/SP (same form factor and footprint) — differing in Package, Core Architecture, Timers, Maximum CPU Speed, Operating Temperature Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F2320-I/SP
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F2220-E/SP
✅ Drop-In✓ In Stock
$2.86 / Unit
View Datasheet →PIC18F2320-E/SP
✅ Drop-In✓ In Stock
$3.59 / Unit
View Datasheet →PIC18F2420-I/SP
✅ Drop-In✓ In Stock
$5.22 / Unit
View Datasheet →PIC18F2520-I/SP
✅ Drop-In✓ In Stock
$3.33 / Unit
View Datasheet →PIC18F2220-I/SP Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit Microcontroller (MCU) |
| Core Architecture | PIC18 (Harvard, RISC) |
| Instruction Set Width | 16-bit |
| Maximum CPU Speed | 40 MHz (40 MIPS) |
| Program Memory (Flash) | 4 KB (2K x 16) |
| EEPROM | 256 bytes |
| Data RAM | 512 bytes |
| ADC | 10-bit, 10 channels |
| Analog Comparators | 2 |
| CCP Modules | 2 (Capture/Compare/PWM) |
| Timers | 2 x 8-bit + 1 x 16-bit |
| Serial Interfaces | 1 x SPI/I2C (MSSP) + 1 x EUSART (RS-232/485) |
| Parallel Slave Port | Yes |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| Supply Current (sleep, nanoWatt) | 0.28 uA typical (watchdog disabled) |
| Operating Temperature Range | -40C to +85C (Industrial) |
| Package | 28-pin SPDIP (SP) |
| Mounting Type | Through-Hole (DIP) |
| MSL Level | Not applicable (through-hole) |
| RoHS Status | Compliant |
| Lead-Free / Pb-Free | Yes |
| Debug Interface | ICD (ICSP via PGC/PGD) |
PIC18F2220-I/SP Pin Configuration
| Pin 1 | MCLR/VPP/RE3 — Master Clear (reset) / Programming voltage / Digital input RE3 |
| Pin 2 | RA0/AN0 — Digital I/O RA0 / Analog input AN0 |
| Pin 3 | RA1/AN1 — Digital I/O RA1 / Analog input AN1 |
| Pin 4 | RA2/AN2/VREF-/CVREF — Digital I/O RA2 / Analog input AN2 / DAC ref-/Comparator ref |
| Pin 5 | RA3/AN3/VREF+ — Digital I/O RA3 / Analog input AN3 / DAC ref+ |
| Pin 6 | RA4/T0CKI/C1OUT — Digital I/O RA4 / Timer0 clock in / Comparator 1 output |
| Pin 7 | RA5/AN4/SS/HLVDIN/C2OUT — Digital I/O RA5 / Analog input AN4 / SPI SS / HLVD input / Comparator 2 output |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKI/RA7 — Crystal osc input / External clock in / Digital I/O RA7 |
| Pin 10 | OSC2/CLKO/RA6 — Crystal osc output / Clock out / Digital I/O RA6 |
| Pin 11 | RC0/T1OSO/T1CKI — Digital I/O RC0 / Timer1 osc out / Timer1 clock in |
| Pin 12 | RC1/T1OSI/CCP2 — Digital I/O RC1 / Timer1 osc in / CCP2 PWM out |
| Pin 13 | RC2/CCP1 — Digital I/O RC2 / CCP1 PWM out |
| Pin 14 | RC3/SCK/SCL — Digital I/O RC3 / SPI clock / I2C clock |
| Pin 15 | RC4/SDI/SDA — Digital I/O RC4 / SPI data in / I2C data |
| Pin 16 | RC5/SDO — Digital I/O RC5 / SPI data out |
| Pin 17 | RC6/TX/CK — Digital I/O RC6 / EUSART TX / EUSART clock |
| Pin 18 | RC7/RX/DT — Digital I/O RC7 / EUSART RX / EUSART data |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage |
| Pin 21 | RB0/AN12/INT0 — Digital I/O RB0 / Analog input AN12 / External int 0 |
| Pin 22 | RB1/AN10/INT1 — Digital I/O RB1 / Analog input AN10 / External int 1 |
| Pin 23 | RB2/AN8 — Digital I/O RB2 / Analog input AN8 |
| Pin 24 | RB3/AN9/CCP2 — Digital I/O RB3 / Analog input AN9 / CCP2 alternate |
| Pin 25 | RB4/AN11/KBI0 — Digital I/O RB4 / Analog input AN11 / Keyboard int 0 |
| Pin 26 | RB5/KBI1/PGM — Digital I/O RB5 / Keyboard int 1 / LVP programming |
| Pin 27 | RB6/KBI2/PGC — Digital I/O RB6 / Keyboard int 2 / ICD clock |
| Pin 28 | RB7/KBI3/PGD — Digital I/O RB7 / Keyboard int 3 / ICD data |
Typical Applications
PIC18F2220-I/SP is suitable for 7 applications: Consumer Appliance Control, Low-Cost Sensor Interface Module, LED Driver / Lighting Controller, Hobbyist / Educational Hardware, Industrial Control Node / RS-485 Slave, Battery-Powered Instrumentation, Automotive Body Electronics (Non-Safety).
Consumer Appliance Control
The PIC18F2220-I/SP's 4 KB Flash, 512 B RAM, and 10-bit ADC are well matched to appliance control boards that read a few sensors and drive relays or triacs. Its 2.0 V to 5.5 V supply range supports both 3.3 V and 5 V designs without level shifters, and the nanoWatt sleep modes (<1 uA) keep standby power low in ENERGY STAR products. Two CCP modules generate PWM for motor speed control or heating element regulation. A typical toaster-oven controller uses ADC channels for temperature sensing and a CCP for bang-bang or PID heater PWM; the EUSART talks to a status display, and an EEPROM-backed setpoint is preserved across power cycles.
Recommended
Low-Cost Sensor Interface Module
The PIC18F2220-I/SP's 10-channel 10-bit ADC, two comparators, and MSSP make it an excellent I2C/SPI sensor hub for low-cost sensor boards. With 256 B EEPROM for calibration constants and 4 KB Flash for linearization code, it can read temperature, humidity, and pressure sensors and publish readings over EUSART or MSSP. Power consumption in sleep mode (0.28 uA typical) supports battery-powered deployment for years from a single coin cell when duty-cycled. The EUSART pairs naturally with RS-485 transceivers for industrial sensor nodes; code-protect bits protect calibration IP.
Recommended
LED Driver / Lighting Controller
For LED strips and DMX-style controllers, the PIC18F2220-I/SP provides two CCP modules for PWM dimming and an MSSP to receive SPI control data, with 4 KB Flash to store chase patterns and color tables. The 40 MHz throughput sustains software PWM at up to 16 kHz (above audible band) for multiple channels time-multiplexed by ISR. 2.0 V to 5.5 V operation suits single-cell Li-ion (with boost) and 5 V USB-power designs. The ICD interface simplifies firmware development for lighting animations and remote-control command parsing.
Recommended
Hobbyist / Educational Hardware
The 28-SPDIP (SP) package through-hole footprint allows students to plug the PIC18F2220-I/SP directly into breadboards, simplifying prototyping in education settings. Combined with MPLAB X, XC8 compiler, and the PICKit 4 ICD, the part teaches interrupt-driven design, ADC sampling, PWM, and serial communication at low cost. 4 KB Flash is enough for a UART bootloader, ADC lab, and PWM lab in one program, while the parallel slave port allows teaching CPU-to-MCU data transfer. The C compiler-friendly instruction set and large PIC18 community resources reduce the student learning curve.
Recommended
Industrial Control Node / RS-485 Slave
The PIC18F2220-I/SP's integrated EUSART and nanoWatt modes suit RS-485 slave nodes such as motor starters or solenoid drivers where standby power matters. Industrial temperature range (-40C to +85C) and code-protect bits are mandatory for field-deployed controllers. The 10-bit ADC reads 4-20 mA process signals via a burden resistor; CCP modules drive solid-state relays. Self-programming Flash allows remote firmware updates over the RS-485 link, eliminating field service trips. The 28-SPDIP package is also convenient for hand-soldered prototype installations.
Recommended
Battery-Powered Instrumentation
When the PIC18F2220-I/SP duty-cycles between ADC readings and sleep, nanoWatt modes drop quiescent current to 0.28 uA typical. With a 3 V coin cell or 2x AA pack, an instrument that wakes every 30 seconds can run for years. The 256 B EEPROM stores calibration and user settings across battery swaps. ICD pins allow factory programming and in-system updates without removing the part. Industrial temperature range and code-protect bits are essential for handheld or remote instrumentation exposed to harsh environments.
Recommended
Automotive Body Electronics (Non-Safety)
Although not AEC-Q100 qualified, the PIC18F2220-I/SP is widely used in non-safety automotive subsystems such as interior lighting, seat heaters, and accessory controllers via the industrial-grade temp range and self-programming Flash. The 2.0 V to 5.5 V range tolerates load-dump transients if external protection is added. PWM outputs drive LEDs and small motors; ADC channels monitor current shunts and temperature. For safety-critical ECUs, choose AEC-Q100-qualified PIC18F variants instead.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F2220-I/SP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F2320-I/SP | PIC18F2220-E/SP | PIC18F2320-E/SP | PIC18F2420-I/SP | PIC18F2520-I/SP |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SPDIP (SP) | 28-SPDIP (SP) - same | 28-SPDIP (SP) - same | 28-SPDIP (SP) - same | 28-SPDIP (SP) - same | 28-SPDIP (SP) - same |
| Program Memory (Flash) | 4 KB | 8 KB | 4 KB | 8 KB | 16 KB | 32 KB |
| Data RAM | 512 B | 512 B | 512 B | 512 B | 768 B | 1536 B |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Maximum CPU Speed | 40 MHz / 40 MIPS | 40 MHz / 40 MIPS | 40 MHz / 40 MIPS | 40 MHz / 40 MIPS | 40 MHz / 40 MIPS | 40 MHz / 40 MIPS |
| Operating Temperature Range | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| ADC Channels / Resolution | 10 / 10-bit | 10 / 10-bit | 10 / 10-bit | 10 / 10-bit | 10 / 10-bit | 10 / 10-bit |
| CCP / PWM Modules | 2 | 2 | 2 | 2 | 2 (enhanced) | 2 (enhanced) |
| Supply Voltage (VDD) | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
Key Differentiators
- Through-hole 28-SPDIP package - breadboard-friendly (vs PIC18F2220-I/SO)
- nanoWatt technology with 0.28 uA sleep typical (vs PIC18F2320-I/SP)
- Industrial -40C to +85C temperature range (vs PIC18F2220-E/SP)
Design Notes
Estimated: at VDD = 5 V and FOSC = 40 MHz, the PIC18F2220 typically draws ~12 mA active. Add 0.1 uF ceramic decoupling as close as possible to both VDD pins (pins 11 and 32 logic-equivalent - for 28-SPDIP pin 20 is the VDD). For nanoWatt sleep operation (watchdog disabled) the datasheet specifies 0.28 uA typical. Use the Sleep instruction and a wake source (INT, WDT, or peripheral interrupt) to drop quiescent current below 1 uA in battery-powered designs.
Place a 10 kohm pull-up on MCLR (pin 1) with a 100 nF decoupling capacitor in series for the standard Microchip MCLR reset circuit. Keep the PGC/PGD traces (pins 27/28) short and avoid routing them near high-frequency switching nodes; the ICD interface is sensitive to capacitive loading above 30 pF. Use a ground plane beneath the SPDIP footprint to provide thermal spreading; the 28-SPDIP is through-hole and benefits from via stitching around the perimeter for EMC robustness.
Do not connect the PGM (RB5/PGM, pin 26) function unintentionally - this pin enables low-voltage programming (LVP) by default and can cause inadvertent entry into programming mode if driven low at startup. Add a 10 kohm pull-up on RB5/PGM or disable LVP in CONFIG to avoid this. Also remember that the ICD pins (RB6/RB7) are not 5 V tolerant when used as digital inputs after disabling the ICD; configure TRISB accordingly before reading these pins as I/O.
Route the analog AGND/AVSS path back to a single-point ground tied to the main ground near the VDD decoupling capacitor. Isolate the AVREF reference pin from noisy digital traces (especially PWM outputs) to avoid ADC noise. The 10-bit ADC is sensitive to source impedance; place a 0.1 uF capacitor on each ADC input used for low-frequency measurement to provide a low-impedance charge reservoir for the sample-and-hold capacitor.
Compliance Information
RoHS compliant per Microchip product page. Lead-free (Pb-free). Industrial temperature range only; not AEC-Q100 qualified. For automotive designs select an AEC-Q100-qualified variant.
