PIC18F4439-E/P - 8-Bit 40MHz MCU 12KB Flash 40-DIP | Microchip
MPN: PIC18F4439-E/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.1 | $8.10 |
| 10 | $7.25 | $72.50 |
| 100 | $6.05 | $605.00 |
| 500 | $5.4 | $2,700.00 |
| 1,000 | $4.85 | $4,850.00 |
PIC18F4439-E/P Overview
An 8-bit microcontroller (MCU) is a self-contained computing element that integrates a CPU core, program memory, RAM, non-volatile data storage, and a range of peripherals on a single silicon die. Within the broader semiconductor taxonomy it sits at: MCU -> microcontroller -> embedded processor -> semiconductor device. The PIC18 family from Microchip Technology uses an enhanced Harvard RISC architecture with 16-bit wide instructions and a 8-bit data path, which simplifies compiler code generation while delivering deterministic interrupt response.
Key features include 12KB Flash program memory organized as 6K x 16 words, the motor-control PWM module with dedicated motion-feedback interfaces, four 16-bit timer/counters, two analog comparators, and the nanoWatt Technology power-managed sleep modes that allow the device to wake on interrupt while drawing microamp-level standby current. The 'E' suffix denotes the extended industrial temperature grade (-40C to +125C), distinguishing it from the 'I' (-40C to +85C) variant.
The PIC18F4439 architectural advantage is its integrated single-phase motor-control kernel (with Power Control PWM and Motion Feedback Module), which removes the need for an external DSP or dedicated motor-controller IC in fan, pump, and small compressor drive designs. Combined with 10-bit ADC, 36 I/O, and nanoWatt Technology, it gives designers a one-chip analog/digital/motion platform.
Typical applications include single-phase induction motor control (fans, pumps, compressors), white goods (washing machines, dishwashers, refrigerators), HVAC blowers, small industrial drives, and general-purpose 5V embedded control with motor actuation. The extended -40C to +125C temperature range and through-hole PDIP package make it especially suited to hobbyist, prototyping, and rugged industrial enclosures.
When designing with this part, verify that the 4.2V to 5.5V supply range matches your system rail; if 3.3V operation is needed, select the 'LF' low-voltage variant instead. Always place a 100 nF decoupling capacitor within 5 mm of each VDD/VSS pair and ensure the MCLR reset network follows Microchip's recommended RC values for reliable power-on behavior.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, providing an at-a-glance engineering comparison for PIC18F4439-E/P selection, replacement, and sourcing decisions.
Drop-in alternatives for PIC18F4439-E/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 PIC18F4439-E/P (same form factor and footprint) — differing in Operating Temperature, Package, Mounting Type, Communication, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F4439-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F4439-E/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.25 / Unit
View Datasheet →PIC18F4423-E/P
✅ Drop-In✓ In Stock
$2.68 / Unit
View Datasheet →PIC18F4331-I/PT
✅ Drop-In✓ In Stock
$3.05 / Unit
View Datasheet →PIC18F4410-I/P
✅ Drop-In✓ In Stock
$4.7 / Unit
View Datasheet →PIC18F45K80-E/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F4439-E/P Maximum Ratings & Electrical Characteristics
| Manufacturer | Microchip Technology |
| Series | PIC 18F |
| Core Processor | PIC18 |
| Core Size | 8-bit |
| Maximum Clock Speed | 40 MHz |
| Program Memory Size | 12 KB (6K x 16) |
| Program Memory Type | Flash |
| Supply Voltage (VDD) | 4.2 V to 5.5 V |
| I/O Pins | 36 |
| A/D Converter | 10-bit |
| Package Type | PDIP-40 (DIP-40, 0.600 inch) |
| Mounting Type | Through-Hole |
| Operating Temperature | -40C to +125C (E = Extended grade) |
| Special Features | Single-phase motor control kernel, nanoWatt Technology, Power Control PWM |
| RoHS Status | Compliant (Pb-free marking per Microchip product page) |
PIC18F4439-E/P Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input / 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 — PORTA bit 5 / Analog input 4 |
| Pin 8 | RE0/RD — PORTE bit 0 / Read control for parallel slave port |
| Pin 9 | RE1/WR — PORTE bit 1 / Write control for parallel slave port |
| Pin 10 | RE2/CS — PORTE bit 2 / Chip select for parallel slave port |
| Pin 11 | VDD — Positive supply voltage |
| Pin 12 | VSS — Ground reference |
| Pin 13 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Pin 14 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| 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 | RD0/PSP0 — PORTD bit 0 / Parallel slave port bit 0 |
| Pin 20 | RD1/PSP1 — PORTD bit 1 / Parallel slave port bit 1 |
| Pin 21 | RD2/PSP2 — PORTD bit 2 / Parallel slave port bit 2 |
| Pin 22 | RD3/PSP3 — PORTD bit 3 / Parallel slave port bit 3 |
| Pin 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 25 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| Pin 26 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| Pin 27 | RD4/PSP4 — PORTD bit 4 / Parallel slave port bit 4 |
| Pin 28 | RD5/PSP5 — PORTD bit 5 / Parallel slave port bit 5 |
| Pin 29 | RD6/PSP6 — PORTD bit 6 / Parallel slave port bit 6 |
| Pin 30 | RD7/PSP7 — PORTD bit 7 / Parallel slave port bit 7 |
| Pin 31 | VSS — Ground reference |
| Pin 32 | VDD — Positive supply voltage |
| Pin 33 | RB0/INT0/FLTA — PORTB bit 0 / External interrupt 0 / PWM fault A |
| Pin 34 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| Pin 35 | RB2/INT2 — PORTB bit 2 / External interrupt 2 |
| Pin 36 | RB3/INT3 — PORTB bit 3 / External interrupt 3 / PGM (low-voltage programming) |
| Pin 37 | RB4 — PORTB bit 4 |
| Pin 38 | RB5 — PORTB bit 5 |
| Pin 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 40 | RB7/PGD — PORTB bit 7 / ICSP data |
Typical Applications
PIC18F4439-E/P is suitable for 6 applications: Single-Phase Induction Motor Control, HVAC Blower and Fan Speed Controllers, White Goods and Appliance Control, Small Industrial Pumps and Compressors, General-Purpose 5V Embedded Control, Renewable Energy Micro-Inverter Controllers.
Single-Phase Induction Motor Control
The PIC18F4439-E/P integrates a Power Control PWM module and Motion Feedback Module specifically tuned for single-phase induction motor commutation. Its 40 MHz core and 10-bit ADC sample back-EMF at rates sufficient for closed-loop torque control in 50/60 Hz fan and pump drives. The 36 I/O pins expose Hall-sensor inputs, triac gate drivers, and zero-cross detect signals, allowing a complete variable-speed drive on one IC without an external motor controller. NanoWatt Technology idle modes drop quiescent current below 1 uA when the motor is stopped, meeting energy-star standby budgets for white goods.
Recommended
HVAC Blower and Fan Speed Controllers
Variable-speed HVAC blowers use the PIC18F4439-E/P motor kernel to compute RPM from the back-EMF feedback module and adjust PWM duty in real time. The 10-bit ADC resolves supply voltage and temperature sensor inputs for over-current and over-temperature shutdown. Extended -40C to +125C operation supports rooftop unit and outdoor condenser installations where ambient swings exceed the industrial 85C ceiling. The 40-pin PDIP package suits serviceable field-replacement modules where through-hole soldering aids field rework.
Recommended
White Goods and Appliance Control
Washing machines, dishwashers, and refrigerators benefit from the PIC18F4439-E/P combined motor-control plus general-purpose I/O on one die. The 12KB Flash fits appliance-class firmware including motor commutation, user-interface scanning, and safety diagnostics. The 36 I/O drives 7-segment displays, keypads, water-level sensors, and door-switch interlatches. Extended temperature grade survives the steam and heat of under-counter laundry installations. NanoWatt Technology sleep modes preserve Energy Star standby power budgets when the appliance is idle.
Recommended
Small Industrial Pumps and Compressors
Fractional-HP pumps and small compressors (1/8 HP to 1/2 HP) use the PIC18F4439-E/P to implement sensorless or Hall-sensor based variable-speed control. The motor-control PWM kernel handles soft-start ramps, current limiting, and stall recovery without an external DSP. The 4.2V to 5.5V supply range supports standard 5V industrial backplanes. Extended temperature grade supports outdoor pump stations and rooftop compressor installations. 12 KB Flash holds the control law, fault log, and serial-modbus interface for SCADA integration.
Recommended
General-Purpose 5V Embedded Control
Outside of motor control, the PIC18F4439-E/P serves as a general-purpose 5V MCU for legacy industrial PLCs, scientific instrumentation, and educational platforms. Its 40 MHz core, 12KB Flash, and 36 I/O match the kind of mid-range compute envelope that hobbyists expect from a classic PIC18. The through-hole PDIP package is breadboard-friendly, making the device a popular choice for university labs and prototyping kits where SOIC/QFN fine-pitch parts are impractical. Peripherals include USART, SPI, I2C, four timers, and two comparators.
Recommended
Renewable Energy Micro-Inverter Controllers
Small-scale solar micro-inverters (typically 100W to 300W class) use the PIC18F4439-E/P motor-control kernel adapted for grid-tie inverter PWM, since the Power Control PWM module generates complementary high-resolution outputs with programmable dead-time. The 10-bit ADC samples PV string current and voltage for MPPT algorithms. Extended temperature grade handles outdoor inverter enclosures that experience full sun loading. 12KB Flash stores MPPT firmware, grid-synchronization routines, and anti-islanding protection.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F4439-E/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F4439-I/P | PIC18F4423-E/P | PIC18F4331-I/P | PIC18F4410-I/P | PIC18F45K80-E/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | PDIP-40 | PDIP-40 (same) | PDIP-40 (same) | PDIP-40 (same) | PDIP-40 (same) | PDIP-40 (same) |
| Program Memory (Flash) | 12 KB | 12 KB (same) | 16 KB (+33%) | 8 KB (-33%) | 16 KB (+33%) | 32 KB (+167%) |
| Maximum Clock | 40 MHz | 40 MHz (same) | 40 MHz (same) | 40 MHz (same) | 40 MHz (same) | 64 MHz (+60%) |
| A/D Converter | 10-bit | 10-bit (same) | 8-bit (lower) | 10-bit (same) | 10-bit (same) | 12-bit (higher) |
| Motor Control Kernel | Yes (single-phase) | Yes (same) | No (general-purpose) | Yes (single-phase) | No (general-purpose) | No (general-purpose) |
| Operating Temperature | -40C to +125C (E grade) | -40C to +85C (I grade) | -40C to +125C (E grade) | -40C to +85C (I grade) | -40C to +85C (I grade) | -40C to +125C (E grade) |
| I/O Pins | 36 | 36 (same) | 36 (same) | 36 (same) | 36 (same) | 36 (same) |
| Approx. Unit Price (qty 1) | $8.10 | $7.20 (-11%) | $8.40 (+4%) | $7.60 (-6%) | $8.30 (+2%) | $9.10 (+12%) |
Key Differentiators
- Dedicated single-phase motor-control kernel eliminates external motor-controller ASIC (vs PIC18F4423-E/P)
- Extended -40C to +125C temperature grade for harsh environments (vs PIC18F4439-I/P)
- 40-pin PDIP through-hole package for breadboard and field-replaceable designs (vs PIC18F45K80-E/P)
Design Notes
Place a 100 nF ceramic decoupling capacitor within 5 mm of each VDD pin (pins 11 and 32) and a bulk 10 uF tantalum or aluminum electrolytic at the PCB power-entry point. The PIC18F4439-E/P draws up to 16 mA at 40 MHz with all peripherals active; ensure the 5V regulator has at least 50% margin. For sleep-mode operation, nanoWatt Technology reduces quiescent current to <1 uA when the system clock is gated off.
The 40-pin PDIP has 2.54 mm (0.100 inch) pin pitch and standard through-hole footprint; reserve a 25 mm x 10 mm minimum land pattern area on the PCB. Keep analog inputs (AN0-AN4) routed away from the PWM output traces and the high-current motor-driver signals; a ground pour under the MCU with a single-point connection to the analog ground star improves ADC noise performance by 1-2 LSB.
The PIC18F4439-E/P MCLR pin (pin 1) must be pulled to VDD through a 10 kohm resistor and have a 100 nF capacitor to ground for proper power-on reset behavior per the Microchip PIC18F4439 datasheet. ICSP programming requires the PGC (RB6, pin 39) and PGD (RB7, pin 40) lines to be reachable via a 6-pin header; add 4.7 kohm series resistors on these lines if they connect to external circuitry to prevent programming conflicts.
At 40 MHz and 5V supply with all peripherals active, the PIC18F4439-E/P dissipates approximately 80 mW internally, well within the PDIP-40 thermal envelope. The extended -40C to +125C grade ensures operation in sealed outdoor enclosures but does not imply high-power dissipation; if your ambient exceeds 70C, derate the clock frequency to 25 MHz to keep junction temperature rise manageable.
Do not apply VDD below 4.2 V - the brown-out reset (BOR) and Flash programming voltages are not guaranteed. If your system runs at 3.3 V, select the PIC18LF4439 variant. Avoid using the parallel slave port (PORTD/PSPx) pins as general-purpose I/O without first disabling the PSP module in the PORTE TRIS register, or you will see bus contention on PORTD. Finally, always read the latest Microchip errata document (DS80392) for known silicon issues before finalizing firmware.
Compliance Information
RoHS and lead-free per Microchip product page markings. Not AEC-Q100 qualified - this is an industrial/consumer grade MCU, not automotive-qualified. REACH compliance declared by Microchip. Conflict-minerals reporting compliant per Microchip's CFSI statements.
