PIC18F4580-I/P - 8-bit MCU, 32KB Flash, ECAN, 40-PDIP | Microchip
MPN: PIC18F4580-I/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.5 | $8.50 |
| 10 | $7.65 | $76.50 |
| 100 | $6.42 | $642.00 |
| 500 | $5.74 | $2,870.00 |
| 1,000 | $5.1 | $5,100.00 |
PIC18F4580-I/P Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), data memory (RAM), and programmable peripherals (ADC, timers, communication blocks). The PIC18F4580 belongs to the PIC18 family, an 8-bit Harvard-architecture core line from Microchip, sitting between the legacy PIC16 family and the 16-bit dsPIC/PIC24 families. MCUs are the smallest tier of the broader microprocessor hierarchy - microcontroller -> embedded processor -> system-on-chip (SoC) -> semiconductor - and are the building blocks of virtually every embedded product.
Key features include hardware ECAN 2.0B with bus mastering capability, 10-bit ADC with up to 11 channels and auto-acquisition, nanoWatt power management with multiple idle/sleep modes, 4 hardware timers, and an enhanced 14-bit instruction set. The ECAN block supports CAN 2.0A/B active and passive filters with FIFO buffering, allowing deterministic in-vehicle and industrial-CAN bus communication.
The PIC18F4580 uses an enhanced Harvard core with separate program and data buses, an 8-bit ALU, and 16-bit wide instructions for compact code density. Its Flash is rated for 100K erase/write cycles and supports self-programming under firmware control - useful for bootloader-based field updates. The 32KB Flash is one of the larger densities in the legacy 8-bit PIC18 family and supports the C18 and XC8 compilers.
Typical applications include CAN-connected industrial sensors, automotive body/comfort ECUs, HVAC controls, building-automation gateways, RS-485 to CAN bridges, and legacy industrial-control replacements. The ECAN peripheral makes the PIC18F4580-I/P particularly suited for older CAN nodes where pin-compatible migration from PIC16/PIC18F248 is needed.
When designing with this device, allocate the 32KB Flash carefully: bootloader, ECAN stack, and application together can exceed 16KB. Use a 4-layer board or generous ground pour around the oscillator pins to reduce EMI on the 40 MHz clock, which can otherwise couple into the ADC.
This page synthesizes DigiKey/Mouser/Octopart pricing, Microchip datasheet specifications, pin-compatible drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC18F4580-I/P — 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 PIC18F4580-I/P (same form factor and footprint) — differing in Package, Timers, Operating Temperature, Program Memory (Flash), Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F4585-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F448-I/P
✅ Drop-In✓ In Stock
$4.42 / Unit
View Datasheet →PIC18F4580-E/P
✅ Drop-In✓ In Stock
$4.41 / Unit
View Datasheet →PIC18F452-I/P
✅ Drop-In✓ In Stock
$5.1 / Unit
View Datasheet →PIC18F4520-I/P
✅ Drop-In✓ In Stock
$5.35 / Unit
View Datasheet →PIC18F4580-I/P Maximum Ratings & Electrical Characteristics
| Core | PIC18 (8-bit Harvard) |
| Instruction Set | Enhanced PIC18, 16-bit wide |
| Program Memory (Flash) | 32 KB (16K x 16) |
| RAM | 1536 bytes |
| EEPROM | 256 bytes |
| Max CPU Frequency | 40 MHz |
| Supply Voltage (VDD) | 4.2 V to 5.5 V |
| I/O Pins | 36 |
| Package | 40-pin PDIP (DIP-40) |
| Operating Temperature | -40 C to +85 C (Industrial) |
| ADC | 10-bit, up to 11 channels |
| CAN | ECAN 2.0A/B (1 module) |
| Timers | 4 (Timer0/1/2/3) |
| Communication | 1x UART, 1x SPI, 1x I2C, 1x ECAN |
| PWM Channels | 2 (10-bit CCP) |
| Internal Oscillator | 8 MHz (with PLL to 32 MHz, software selectable) |
| Mounting Type | Through-Hole |
| MSL Level | 1 (Not Moisture Sensitive) |
| RoHS Status | Compliant |
PIC18F4580-I/P Pin Configuration
| Pin 1 | MCLR/VPP — Master Clear (reset) input / ICSP programming voltage |
| Pin 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Pin 4 | RA2/AN2/VREF- — PORTA bit 2 / Analog input 2 / ADC VREF- |
| Pin 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / ADC VREF+ |
| Pin 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI slave select |
| Pin 8 | RE0/RD/AN5 — PORTE bit 0 / Read control / Analog input 5 |
| Pin 9 | RE1/WR/AN6 — PORTE bit 1 / Write control / Analog input 6 |
| Pin 10 | RE2/CS/AN7 — PORTE bit 2 / Chip select / Analog input 7 |
| Pin 11 | VDD — Positive supply voltage (4.2-5.5 V) |
| Pin 12 | VSS — Ground reference |
| Pin 13 | OSC1/CLKI/RA7 — Crystal oscillator input / External clock input / PORTA bit 7 |
| Pin 14 | OSC2/CLKO/RA6 — Crystal oscillator output / Clock output / PORTA bit 6 |
| Pin 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pin 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 PWM output |
| Pin 17 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| Pin 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin 19 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 20 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 21 | RC6/TX/CK — PORTC bit 6 / UART TX / UART clock |
| Pin 22 | RC7/RX/DT — PORTC bit 7 / UART RX / UART data |
| Pin 23 | RB0/INT0 — PORTB bit 0 / External interrupt 0 |
| Pin 24 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| Pin 25 | RB2/INT2 — PORTB bit 2 / External interrupt 2 |
| Pin 26 | RB3/CCP2 — PORTB bit 3 / CCP2 alternate |
| Pin 27 | RB4 — PORTB bit 4 (interrupt-on-change) |
| Pin 28 | RB5 — PORTB bit 5 (interrupt-on-change) |
| Pin 29 | RB6/PGC — PORTB bit 6 / ICSP clock (interrupt-on-change) |
| Pin 30 | RB7/PGD — PORTB bit 7 / ICSP data (interrupt-on-change) |
| Pin 31 | VSS — Ground reference |
| Pin 32 | VDD — Positive supply voltage (4.2-5.5 V) |
| Pin 33 | RD0/PSP0 — PORTD bit 0 / Parallel slave port bit 0 |
| Pin 34 | RD1/PSP1 — PORTD bit 1 / Parallel slave port bit 1 |
| Pin 35 | RD2/PSP2 — PORTD bit 2 / Parallel slave port bit 2 |
| Pin 36 | RD3/PSP3 — PORTD bit 3 / Parallel slave port bit 3 |
| Pin 37 | RD4/PSP4 — PORTD bit 4 / Parallel slave port bit 4 |
| Pin 38 | RD5/PSP5 — PORTD bit 5 / Parallel slave port bit 5 |
| Pin 39 | RD6/PSP6/TX2 — PORTD bit 6 / Parallel slave port bit 6 / ECAN TX |
| Pin 40 | RD7/PSP7/RX2 — PORTD bit 7 / Parallel slave port bit 7 / ECAN RX |
Typical Applications
PIC18F4580-I/P is suitable for 7 applications: Industrial CAN Sensor Nodes, Automotive Body & HVAC ECUs, Building Automation Gateways, Industrial Motor Auxiliary Control, Legacy Industrial Control Replacement, CAN-to-UART Protocol Bridge, Power Metering and Energy Monitoring.
Industrial CAN Sensor Nodes
The PIC18F4580-I/P fits industrial CAN sensor nodes because its integrated ECAN 2.0A/B controller eliminates the need for an external MCP2515 CAN controller, reducing PCB area and BOM cost. With 32 KB Flash, it runs CANOpen or DeviceNet slave stacks with room left over for sensor calibration tables. The 36 I/O pins handle digital inputs and outputs directly, while the 10-bit ADC with up to 11 channels reads analog sensors. Hardware acceptance filtering in ECAN reduces CPU load compared to software bit-banged CAN. At 40 MHz, the part handles 10-bit ADC conversions in under 20 us while maintaining CAN bus responsiveness. Typical 4.2-5.5 V supply draws directly from a 5V industrial rail without level shifters.
Recommended
Automotive Body & HVAC ECUs
The PIC18F4580-I/P suits aftermarket automotive body-control and HVAC ECUs because its industrial -40C to +85C temperature grade and ECAN peripheral allow direct connection to vehicle CAN buses. The 32 KB Flash holds typical body-controller firmware including CAN diagnostics, while 1536 bytes of RAM accommodates CAN mailbox buffers and stack usage. The 4 hardware timers drive PWM outputs for HVAC damper motors and lighting loads. The 40-pin PDIP package is well-suited to prototype and low-volume aftermarket production where through-hole soldering simplifies field service. For OEM automotive designs, pair with the PIC18F4580-E/P extended-temperature variant to meet under-hood thermal requirements.
Recommended
Building Automation Gateways
The PIC18F4580-I/P serves as a CAN-to-RS485 or CAN-to-Modbus gateway for building automation because its ECAN peripheral plus integrated UART provide two independent communication channels in a single chip. The 32 KB Flash fits BACnet or Modbus mapping tables for medium-sized buildings. nanoWatt power management reduces idle-mode current below 1 uA, suitable for always-on infrastructure equipment. The 10-bit ADC reads analog sensors such as temperature and humidity. The 40-pin PDIP form factor supports legacy facility-management field installations that still rely on through-hole parts for serviceability.
Recommended
Industrial Motor Auxiliary Control
The PIC18F4580-I/P works as an auxiliary controller on industrial motor drives where it handles CAN communication with the main VFD plus analog sensor feedback. Its 10-bit ADC with 11 channels reads current shunts, thermistors, and tachometer signals, while two 10-bit PWM channels drive fan control and brake logic. The 36 I/O pins connect to opto-isolated digital inputs from limit switches and contactors. The 32 KB Flash accommodates custom fault detection and field-updatable firmware via in-system programming. Hardware ECAN avoids the latency penalty of software CAN implementations in safety-relevant motor control loops.
Recommended
Legacy Industrial Control Replacement
The PIC18F4580-I/P is widely used as a replacement for obsolete PIC16C / early PIC18F parts in legacy industrial systems because it maintains the 40-pin PDIP footprint and PIC instruction set compatibility. 32 KB Flash is large enough to rehost legacy firmware written for smaller PIC16/PIC18F parts. The ECAN peripheral allows modernization of older RS-485-only designs onto CAN bus without adding external chips. The industrial -40C to +85C grade matches the temperature requirements of factory-floor equipment. The MPLAB ICD 5 in-circuit debugger supports the part, simplifying field service and integration. In-system self-programming enables bootloader-based firmware updates without removing the part from the board.
Recommended
CAN-to-UART Protocol Bridge
The PIC18F4580-I/P excels as a dedicated CAN-to-UART protocol bridge because it has exactly the right peripheral set: one ECAN controller plus one UART, both with hardware FIFOs. The 32 KB Flash fits a custom protocol translation layer plus diagnostics; 1536 bytes of RAM handles buffer and queue management. Hardware ECAN acceptance filtering reduces CPU interrupt load compared to bit-banged solutions, allowing high bus throughput without missing UART bytes. The 36 I/O pins support status LEDs, mode switches, and configuration straps without external logic. The 40-pin PDIP form factor remains serviceable in industrial cabinets where through-hole parts simplify field replacement.
Recommended
Power Metering and Energy Monitoring
The PIC18F4580-I/P can serve in CAN-connected power-metering modules because its 10-bit ADC reads current and voltage sensors while ECAN transmits energy data to a centralized building or substation controller. The 32 KB Flash is sufficient for calibration tables, RMS calculation routines, and CANOpen energy-profile objects. The 4 hardware timers drive synchronized ADC sampling at power-line frequency without CPU overhead. nanoWatt sleep modes keep standby consumption low in metered installations where regulatory idle-power limits apply. The industrial -40C to +85C grade matches outdoor metering cabinet environments.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F4580-I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F4585-I/P | PIC18F448-I/P | PIC18F4580-E/P | PIC18F452-I/P | PIC18F4520-I/P |
|---|---|---|---|---|---|---|
| Package | 40-pin PDIP | 40-pin PDIP - same | 40-pin PDIP - same | 40-pin PDIP - same | 40-pin PDIP - same | 40-pin PDIP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 32 KB | 48 KB | 16 KB | 32 KB (same) | 32 KB (same) | 32 KB (same) |
| RAM | 1536 bytes | 3328 bytes | 768 bytes | 1536 bytes (same) | 1536 bytes (same) | 1536 bytes (same) |
| ECAN Module | Yes (1 ECAN) | Yes (1 ECAN) | Legacy CAN 2.0A/B (no ECAN) | Yes (1 ECAN) | No CAN | No CAN |
| Max CPU Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +125 C (Extended) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) |
| Approx. 1pc Price (USD) | 8.50 | ~9.00 | ~7.50 | ~10.50 | ~7.00 | ~6.50 |
Key Differentiators
- Integrated hardware ECAN 2.0A/B controller (vs PIC18F452-I/P)
- More Flash and RAM than the lower-tier PIC18F448 (vs PIC18F448-I/P)
- Enhanced ECAN features vs legacy CAN (vs PIC18F448-I/P)
- Extended temperature variant available in same package (vs PIC18F4580-E/P)
Design Notes
The PIC18F4580-I/P requires a stable 4.2-5.5 V supply; place 100 nF and 10 uF decoupling capacitors as close as possible to the two VDD pins (11 and 32) and the VSS pins (12 and 31). For battery-backed applications, the brown-out reset (BOR) should be enabled in configuration bits to prevent code corruption during supply droops. The nanoWatt idle/sleep modes drop current to microampere levels but require the watchdog timer to be configured to wake the part - never leave WDT disabled in long-idle designs.
Route the ECAN bus (RD6/CAN_TX and RD7/CAN_RX) as a short differential pair matched to 120 ohms characteristic impedance, even on 2-layer boards. Keep the CAN bus traces away from the 40 MHz oscillator traces and parallel to ground pours. Place the MCP2551 CAN transceiver within 50 mm of the MCU. Use a ground plane on the bottom layer for return-current continuity. The 40-pin PDIP allows through-hole prototyping but limits high-frequency signal integrity - for high-speed CAN (>500 kbps) or noisy environments, prefer the TQFP-44 variant on a 4-layer board.
Do not enable the internal PLL when the system supply is below 4.5 V - PIC18F4580 PLL operation requires VDD >= 4.5 V per the datasheet electrical characteristics. In-system programming through PGC/PGD (RB6/RB7) requires those pins to be configured as high-impedance inputs; resistors on PGC/PGD should not exceed 10 kohm or programming may fail. The PIC18F4580 is NOT a drop-in replacement for PIC18F448 in designs that depend on ECAN features - the F448 has only legacy CAN 2.0A/B without ECAN's enhanced filtering. Configuration bits for oscillator, watchdog, and BOR must be set explicitly; relying on factory defaults can result in erratic resets.
The PIC18F4580-I/P in a 40-pin PDIP package has thermal resistance theta_JA of approximately 50 C/W. Estimated: at 40 MHz active CPU + ECAN transmission + ADC sampling, total power dissipation is below 100 mW, giving a junction temperature rise under 5 C above ambient - well within the industrial -40 C to +85 C range. No heatsink is required. However, in a sealed enclosure with no airflow at 85 C ambient, ensure the surrounding circuitry does not elevate the local ambient above 70 C to maintain margin.
The 40 MHz oscillator pins (OSC1/OSC2) can radiate harmonics into the analog inputs (AN0-AN7) if the traces run parallel and unshielded. Estimated: keep the analog traces on the opposite side of the board from the oscillator with a ground moat between them, or use the internal oscillator instead and leave OSC1/OSC2 as GPIO. For precision ADC readings, use the dedicated VREF+/VREF- pins (RA3/RA2) and bypass them with 100 nF + 10 uF capacitors; do not derive ADC reference from VDD if accuracy better than 8 bits is required.
Compliance Information
RoHS compliant per Microchip product page. Not formally AEC-Q100 qualified - Microchip does not list PIC18F4580 on its automotive catalog. For OEM automotive designs, use AEC-Q100 qualified PIC18 alternates or qualify under customer's own automotive program.
