PIC18F2439T-E/SO - 8-bit 12KB Flash MCU Motor Control | Microchip
MPN: PIC18F2439T-E/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.95 | $6.95 |
| 10 | $6.18 | $61.80 |
| 100 | $5.32 | $532.00 |
| 500 | $4.68 | $2,340.00 |
| 1,000 | $4.1 | $4,100.00 |
PIC18F2439T-E/SO Overview
What is a PIC18F microcontroller? PIC18F is Microchip's high-performance 8-bit Flash MCU family built on a Harvard RISC architecture with hardware multiplier. PIC18F parts occupy the middle of the 8-bit portfolio between baseline PIC10/12/16 and 16-bit dsPIC33 devices, balancing code density, peripheral integration, and C-compiler friendliness for cost-sensitive real-time control.
The PIC18F2439 includes a dedicated Power Control PWM module with up to four PWM outputs, a 10-bit ADC with auto-sampling, a Capture/Compare/PWM (CCP) module, an enhanced USART, and a 4x phase-locked loop option for system clock flexibility. Three power-managed operating modes allow designers to trade switching frequency for quiescent current in standby. Integrated peripherals reduce BOM cost in fan, pump, and single-phase induction motor drive applications.
Typical applications include single-phase induction motor control for white goods and HVAC blowers, ceiling fans and pumps, low-cost BLDC driver boards, sensor signal conditioning nodes, and general-purpose industrial control loops requiring deterministic 8-bit performance.
When designing with this part, the T-suffix denotes tape-and-reel packaging, the E denotes the extended operating temperature grade (-40C to +125C), and the /SO indicates the 28-pin SOIC footprint. Validate the ICSP programming interface against the chosen in-circuit programmer, and confirm PWM dead-time and ADC acquisition timing against motor commutation requirements.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical motor-control design notes beyond the manufacturer datasheet excerpt.
Drop-in alternatives for PIC18F2439T-E/SO — 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 PIC18F2439T-E/SO (same form factor and footprint) — differing in ADC, Core Architecture, Instruction Set, Package, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F2431T-E/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F2439-E/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F4431T-E/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ12MC202T-E/SO
✅ Drop-In✓ In Stock
$3.05 / Unit
View Datasheet →DSPIC33FJ12MC202-E/SO
✅ Drop-In✓ In Stock
$3.21 / Unit
View Datasheet →PIC18F2423T-I/SO
✅ Drop-In✓ In Stock
$2.52 / Unit
View Datasheet →PIC18F2439T-E/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18F (8-bit Harvard RISC) |
| Program Memory (Flash) | 12 KB (6K x 16) |
| Maximum CPU Frequency | 40 MHz |
| Operating Voltage (Vdd) | 5 V (typical industrial range) |
| Package | 28-pin SOIC (SO, 0.295 inch / 7.50 mm body width) |
| Mounting Type | Surface Mount |
| Temperature Grade (E suffix) | -40C to +125C (extended, automotive-grade) |
| Temperature Grade (I suffix, related parts) | -40C to +85C (industrial) |
| ADC | 10-bit successive approximation |
| Power Control PWM Module | Up to 4 PWM outputs (PIC18F2439 motor control kernel) |
| Capture/Compare/PWM (CCP) | 1 enhanced CCP module |
| Communication | Enhanced USART, I2C/SPI (SSP) |
| Instruction Set | PIC18F (77 instructions, 16-bit opcode, hardware multiplier) |
| ICSP Programming | In-Circuit Serial Programming supported |
| RoHS Status | Compliant |
PIC18F2439T-E/SO Pin Configuration
| Pin 1 | MCLR/RE3 — Master Clear (reset) input or digital input RE3 |
| 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 / SSP slave select |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/RA7 — Crystal oscillator input / PORTA bit 7 |
| Pin 10 | OSC2/RA6 — Crystal oscillator output / PORTA bit 6 |
| Pin 11 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock |
| Pin 12 | RC1/T1OSI — PORTC bit 1 / Timer1 oscillator input |
| Pin 13 | RC2/CCP1 — PORTC bit 2 / Capture-Compare-PWM 1 output |
| Pin 14 | RC3 — PORTC bit 3 |
| Pin 15 | RC4 — PORTC bit 4 |
| Pin 16 | RC5 — PORTC bit 5 |
| Pin 17 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| Pin 18 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage |
| Pin 21 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| Pin 22 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| Pin 23 | RB2 — PORTB bit 2 |
| Pin 24 | RB3 — PORTB bit 3 |
| Pin 25 | RB4 — PORTB bit 4 |
| Pin 26 | RB5 — PORTB bit 5 |
| Pin 27 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 28 | RB7/PGD — PORTB bit 7 / ICSP data |
Typical Applications
PIC18F2439T-E/SO is suitable for 6 applications: Single-Phase Induction Motor Control, HVAC Blower and Fan Drives, White Goods and Appliance Control, Low-Cost BLDC Driver Boards, Industrial Sensor Signal Conditioning, Pump and Compressor Control.
Single-Phase Induction Motor Control
The PIC18F2439T-E/SO is purpose-built for single-phase induction motor control. Its dedicated Power Control PWM module delivers up to four complementary outputs with programmable dead-time and fault-input shutdown, eliminating an external PWM controller on fan, pump, and compressor drives. At 40 MHz the device produces 10 MIPS of compute throughput, sufficient for closed-loop V/Hz or vector-control firmware on appliances such as ceiling fans, range hoods, and washing-machine drain pumps. The 10-bit ADC with auto-sampling handles shunt-current and back-EMF feedback at PWM rates up to 25 kHz without CPU intervention. Extended -40C to +125C operation supports under-hood and high-ambient industrial cabinets, while 12 KB Flash accommodates state-machine control plus diagnostic logging in the same firmware image.
Recommended
HVAC Blower and Fan Drives
HVAC blower and ceiling fan drives benefit from the PIC18F2439T-E/SO's integrated motor-control PWM and 10-bit ADC in a 28-pin SOIC. Designers can implement variable-speed profiles with closed-loop RPM feedback by feeding a Hall sensor or back-EMF signal into the ADC and modulating PWM duty cycle in firmware. The PIC18F2439T-E/SO's 40 MHz CPU provides ample headroom for PI control loops and soft-start ramps, while the extended -40C to +125C temperature grade withstands attic and outdoor-cabinet conditions. With 12 KB of Flash the firmware can store multiple speed presets, fault-history logs, and AC-line synchronization tables - features that traditionally required a separate EEPROM. The 28-pin SOIC footprint is friendly to wave-soldered and reflow processes for high-volume appliance production.
Recommended
White Goods and Appliance Control
The PIC18F2439T-E/SO fits dishwasher, washer, and refrigerator control boards where a single MCU must orchestrate motor drive plus user-interface and sensor multiplexing. Its Capture/Compare/PWM (CCP) module can time user-button debounce or zero-cross detection, while the enhanced USART links to a display driver or wireless module. The 12 KB Flash budget comfortably holds IEC 60730 Class B self-test routines that white-goods safety standards increasingly require, and the 10-bit ADC reads thermistor, pressure, and level inputs. Extended -40C to +125C operation covers proximity to compressors and heating elements where ambient temperature regularly exceeds 100C. The 28-pin SOIC and tape-and-reel format suit high-volume SMT lines.
Recommended
Low-Cost BLDC Driver Boards
The PIC18F2439T-E/SO can drive low-cost brushless DC motors in sensorless or Hall-sensor configurations when paired with discrete gate drivers. Although optimized for single-phase induction, the Power Control PWM module still generates the six-step or sinusoidal commutation patterns common in BLDC firmware. At 40 MHz the device runs commutation state machines plus speed PI loops, and the 10-bit ADC samples back-EMF on a freewheeling phase at each PWM cycle. The 28-pin SOIC footprint is compatible with hobbyist and OEM driver boards, and tape-and-reel packaging suits automated assembly. Extended -40C to +125C operation handles outdoor and tool-cabinet environments, while 12 KB Flash holds field-orientation or trapezoidal commutation libraries plus fault handling.
Recommended
Industrial Sensor Signal Conditioning
General industrial sensor-conditioning nodes use the PIC18F2439T-E/SO when local PWM excitation and 10-bit ADC capture are needed in a single chip. The PWM module generates excitation waveforms for strain-gauge bridges, LVDT primaries, and ultrasonic transducers; the on-chip ADC digitizes return signals at up to ~30 kS/s with deterministic timing tied to PWM edges. Enhanced USART and SSP (I2C/SPI) interfaces forward conditioned data to a host PLC or wireless module. The -40C to +125C temperature grade supports outdoor and factory-floor deployments without additional thermal conditioning, and 12 KB Flash holds calibration tables, linearization polynomials, and Modbus or CAN-friendly framing routines.
Recommended
Pump and Compressor Control
Water pumps, oil pumps, and small compressors benefit from the PIC18F2439T-E/SO's combined motor-control PWM, ADC, and over-temperature grade. The device can read pressure-transducer feedback, modulate PWM duty to maintain a setpoint, and execute soft-start routines that reduce inrush current on single-phase AC lines. Extended -40C to +125C operation is essential in pump cabinets where motor heat elevates ambient temperature, and 12 KB Flash holds protection logic for dry-run, over-pressure, and locked-rotor conditions without external components. The 28-pin SOIC package is the de facto footprint for HVAC and pump control PCBs, simplifying sourcing and second-sourcing with the PIC18F2431-E/SO and PIC18F4431-E/SO family siblings.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F2439T-E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F2431T-E/SO | PIC18F2439-E/SO | PIC18F4431T-E/SO | DSPIC33FJ12MC202T-E/SO | DSPIC33FJ12MC202-E/SO | PIC18F2423T-I/SO |
|---|---|---|---|---|---|---|---|
| Package | 28-pin SOIC (SO, 7.50 mm) | 28-pin SOIC (SO, 7.50 mm) - same | 28-pin SOIC (SO, 7.50 mm) - same | 28-pin SOIC (SO, 7.50 mm) - same | 28-pin SOIC (SO, 7.50 mm) - same | 28-pin SOIC (SO, 7.50 mm) - same | 28-pin SOIC (SO, 7.50 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Architecture | PIC18F (8-bit) | PIC18F (8-bit) | PIC18F (8-bit) | PIC18F (8-bit) | dsPIC33 (16-bit) | dsPIC33 (16-bit) | PIC18F (8-bit) |
| Program Memory (Flash) | 12 KB | 8 KB | 12 KB | 16 KB | 12 KB | 12 KB | 16 KB |
| Maximum CPU Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MIPS | 40 MIPS | 40 MHz |
| Temperature Grade (E suffix) | -40C to +125C (extended) | -40C to +125C (extended) | -40C to +125C (extended) | -40C to +125C (extended) | -40C to +125C (extended) | -40C to +125C (extended) | -40C to +85C (industrial) |
| Power Control PWM Module | Yes (4 outputs) | Yes (4 outputs) | Yes (4 outputs) | Yes (8 outputs) | Yes (motor control PWM) | Yes (motor control PWM) | Standard CCP only |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| Packaging Format | Tape & Reel (T) | Tape & Reel (T) | Tube | Tape & Reel (T) | Tape & Reel (T) | Tube | Tape & Reel (T) |
Key Differentiators
- Dedicated Power Control PWM module with up to 4 outputs (vs PIC18F2423T-I/SO)
- Extended -40C to +125C temperature grade standard (vs PIC18F2423T-I/SO)
- Drop-in 28-pin SOIC footprint with verified pin-compatibility across family (vs DSPIC33FJ12MC202T-E/SO)
Design Notes
The PIC18F2439T-E/SO operates from a single 4.2V-5.5V supply on VDD with VSS as ground. Place a 100 nF decoupling capacitor within 5 mm of each VDD pin and a bulk 10 uF tantalum or ceramic on the main VDD rail; the AVDD (if tied out separately on the chosen package variant) requires its own 100 nF low-ESR capacitor to keep ADC reference noise below 1 LSB at full sampling rate.
Estimated: At sustained 40 MHz CPU clock, the PIC18F2439T-E/SO core current draw reaches approximately 16 mA (per Microchip PIC18F2439 datasheet DC characteristics), producing ~80 mW dissipation in the 28-pin SOIC package with theta_JA near 80 C/W on a 2-layer board. Under -40C to +125C ambient the junction-to-ambient temperature rise stays well below the 150C maximum, but a ground copper pour is still recommended to spread heat.
Do not skip the configuration-bit settings for the oscillator and watchdog; leaving the watchdog disabled in a motor-control application exposes the firmware to lockup if PWM interrupts fail. The ICSP pins RB6/PGC and RB7/PGD must not be tied to low-impedance loads during in-circuit programming or else programmer drive contention will reset the device. Always insert 4.7 kohm pull-ups on SDA/SCL for I2C and verify the ADC acquisition time is set above 1.4 us when source impedance exceeds 2.5 kohm.
Keep the analog AVSS/AVDD pair (when brought out on this SOIC variant) routed as a Kelvin star directly back to the regulator ground, separate from the digital switching return path of the PWM outputs. Route the crystal traces between OSC1 and OSC2 within 5 mm of the package, surrounded by a ground guard ring, and never cross them with the PWM output traces which carry dV/dt above 1 V/ns.
Compliance Information
RoHS and lead-free per Microchip product page; AEC-Q100 qualification not formally listed on distributor pages despite the E (extended) temperature suffix, so automotive OEM projects should request the AEC-Q100 letter from Microchip directly.
