PIC18F44J10T-I/ML - 8-bit 40MHz PIC MCU 16KB Flash 44-QFN | Microchip
MPN: PIC18F44J10T-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.1 | $5.10 |
| 10 | $4.58 | $45.80 |
| 100 | $3.69 | $369.00 |
| 500 | $3.12 | $1,560.00 |
| 1,000 | $2.78 | $2,780.00 |
PIC18F44J10T-I/ML Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), data memory (RAM), and peripherals such as timers, ADC, USART, I2C and SPI onto one die. Within the broader semiconductor taxonomy, an MCU sits at the lowest tier of computing devices - below microprocessors (MPU) and digital signal processors (DSP). The PIC18 family is Microchip's high-performance 8-bit line featuring a 16-bit modified Harvard architecture, 77 instruction set, and nanoWatt Technology for power-managed operation. PIC18J sub-family members, like the PIC18F44J10, operate from a 2.0 V to 3.6 V core rail with 5.5 V tolerant digital I/O.
Key specifications include a 40 MHz maximum operating frequency (10 MIPS), 16 KB Flash program memory, 2 KB SRAM data memory, 36 digital I/O pins, a 10-bit ADC with up to 13 channels, two USART modules (one enhanced with LIN master capability), two MSSP (I2C/SPI) ports with I2C address masking, and two CCP/ECCP modules. The 44-pin QFN package with exposed pad yields a compact 8 mm x 8 mm footprint suitable for high-density PCB layouts.
The PIC18F44J10 uses an enhanced 16-bit instruction set with hardware multiply, dedicated peripheral registers, and nanoWatt Technology power management including idle, sleep and run-time peripheral disabling. The 2.5 V / 3.3 V core supply with 5.5 V tolerant I/O simplifies interfacing to legacy 5 V logic, while the 64-level hardware stack with software-pushable overflow handling allows complex state machines.
Typical applications include industrial control and human-machine interface (HMI) panels, USB-to-UART bridges, sensor hubs with LIN bus, low-cost graphic LCD controllers, embedded data loggers, and consumer appliances requiring serial connectivity. Two MSSP peripherals with I2C address masking make it especially useful in multi-slave sensor networks.
Designers should observe the 3.0 V minimum core supply (typical 3.3 V) and place a decoupling 0.1 µF capacitor on every VDD/VSS pair within 3 mm of the pin. The exposed thermal pad must be soldered to a continuous ground plane to meet the 50 mW per pin power dissipation budget and to satisfy the IPC-7351 thermal relief footprint.
This page synthesizes Microchip datasheet specifications, DigiKey live distributor pricing, package-consistent drop-in alternatives, and practical design notes that complement the manufacturer's product page and shorten the engineering evaluation cycle.
Drop-in alternatives for PIC18F44J10T-I/ML — 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 PIC18F44J10T-I/ML (same form factor and footprint) — differing in Core Architecture, Package, Operating Temperature, Program Memory (Flash), Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F44J10-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F4410T-I/ML
✅ Drop-In✓ In Stock
$2.4 / Unit
View Datasheet →PIC18F4420T-I/ML
✅ Drop-In✓ In Stock
$2.65 / Unit
View Datasheet →PIC18F4458T-I/ML
✅ Drop-In✓ In Stock
$4.25 / Unit
View Datasheet →PIC18F4450T-I/ML
✅ Drop-In✓ In Stock
$3.83 / Unit
View Datasheet →PIC18F4439T-I/ML
✅ Drop-In✓ In Stock
$3.32 / Unit
View Datasheet →PIC18F44J10T-I/ML Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 (8-bit RISC, 16-bit modified Harvard) |
| Program Memory Type | Flash |
| Program Memory Size | 16 KB (8K x 16) |
| Maximum CPU Frequency | 40 MHz |
| MIPS Performance | 10 MIPS |
| Supply Voltage (VDD) | 2.0 V to 3.6 V (3.3 V typical) |
| I/O Voltage Tolerance | 5.5 V tolerant digital I/O |
| Digital I/O Pins | 36 |
| ADC | 10-bit, up to 13 channels |
| Communication Interfaces | 2x USART (LIN-capable), 2x MSSP (I2C/SPI with I2C address masking) |
| Capture/Compare/PWM | 2x CCP + 1x ECCP |
| Operating Temperature Range | -40 °C to +85 °C (Industrial, 'I') |
| Package | 44-pin QFN (8x8 mm) with exposed pad |
| Mounting Type | Surface Mount (Tape & Reel) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC18F44J10T-I/ML Pin Configuration
| Pin 1 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| Pin 2 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| Pin 3 | RA2/AN2/VREF- — Port A bit 2 / Analog input 2 / ADC VREF- |
| Pin 4 | RA3/AN3/VREF+ — Port A bit 3 / Analog input 3 / ADC VREF+ |
| Pin 5 | RA4/AN4 — Port A bit 4 / Analog input 4 |
| Pin 6 | RA5/AN5 — Port A bit 5 / Analog input 5 |
| Pin 7 | RA6/OSC2 — Port A bit 6 / Oscillator output |
| Pin 8 | RA7/OSC1 — Port A bit 7 / Oscillator input |
| Pin 9 | VSS1 — Ground reference for logic and I/O pins |
| Pin 10 | VDD1 — Positive supply for logic and I/O pins (3.3 V typical) |
| Pin 11 | RB0/INT0/FLT0 — Port B bit 0 / External interrupt 0 / ECCP fault input |
| Pin 12 | RB1/INT1 — Port B bit 1 / External interrupt 1 |
| Pin 13 | RB2/INT2 — Port B bit 2 / External interrupt 2 |
| Pin 14 | RB3/INT3/ECCP2/P2A — Port B bit 3 / External interrupt 3 / ECCP2 channel A |
| Pin 15 | RB4/KBI0 — Port B bit 4 / Keyboard interrupt 0 |
| Pin 16 | RB5/KBI1 — Port B bit 5 / Keyboard interrupt 1 |
| Pin 17 | RB6/KBI2/PGC — Port B bit 6 / Keyboard interrupt 2 / ICSP clock |
| Pin 18 | RB7/KBI3/PGD — Port B bit 7 / Keyboard interrupt 3 / ICSP data |
| Pin 19 | VSS2 — Ground reference (second) |
| Pin 20 | VDD2 — Positive supply (second) (3.3 V typical) |
| Pin 21 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pin 22 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer1 oscillator input / CCP2 |
| Pin 23 | RC2/CCP1/P1A — Port C bit 2 / CCP1 / Enhanced PWM output P1A |
| Pin 24 | RC3/SCL1/SCK1 — Port C bit 3 / I2C1 clock / SPI1 clock |
| Pin 25 | RC4/SDA1/SDI1 — Port C bit 4 / I2C1 data / SPI1 data in |
| Pin 26 | RC5/SDO1 — Port C bit 5 / SPI1 data out |
| Pin 27 | RC6/TX1/CK1 — Port C bit 6 / USART1 async transmit / sync clock |
| Pin 28 | RC7/RX1/DT1 — Port C bit 7 / USART1 async receive / sync data |
| Pin 29 | VSS3 — Ground reference (third) |
| Pin 30 | VDD3 — Positive supply (third) (3.3 V typical) |
| Pin 31 | RD0/PSP0 — Port D bit 0 / Parallel slave port bit 0 |
| Pin 32 | RD1/PSP1 — Port D bit 1 / Parallel slave port bit 1 |
| Pin 33 | RD2/PSP2 — Port D bit 2 / Parallel slave port bit 2 |
| Pin 34 | RD3/PSP3 — Port D bit 3 / Parallel slave port bit 3 |
| Pin 35 | RD4/PSP4 — Port D bit 4 / Parallel slave port bit 4 |
| Pin 36 | RD5/PSP5/P1B — Port D bit 5 / Parallel slave port bit 5 / PWM P1B |
| Pin 37 | RD6/PSP6/P1C — Port D bit 6 / Parallel slave port bit 6 / PWM P1C |
| Pin 38 | RD7/PSP7/P1D — Port D bit 7 / Parallel slave port bit 7 / PWM P1D |
| Pin 39 | RE0/RD — Port E bit 0 / Parallel slave port read control |
| Pin 40 | RE1/WR — Port E bit 1 / Parallel slave port write control |
| Pin 41 | RE2/CS — Port E bit 2 / Parallel slave port chip select |
| Pin 42 | VSS4 — Ground reference (fourth) |
| Pin 43 | VDD4 — Positive supply (fourth) (3.3 V typical) |
| Pin 44 | MCLR/RA5 — Master clear reset input (active low) / alternate RA5 |
| Pin 45 | EP — Exposed thermal pad - must be soldered to ground plane for thermal dissipation |
Typical Applications
PIC18F44J10T-I/ML is suitable for 7 applications: Industrial Control and HMI Panel, USB-to-UART Bridge, Sensor Hub with LIN Bus, Low-Cost Graphic LCD Controller, Embedded Data Logger, Consumer Appliance with Serial Connectivity, IoT Sensor Node with SPI Display.
Industrial Control and HMI Panel
The PIC18F44J10T-I/ML fits industrial HMI panels and control boards where 40 MHz / 10 MIPS performance, 5.5 V tolerant I/O, and LIN-bus capable USARTs are required. Its 36 digital I/O drive 25 mA per pin, enough to sink LED matrix rows directly or interface to 5 V optocouplers without level shifters. The two MSSP peripherals (I2C/SPI) with I2C address masking simplify multi-slave sensor networks - a keypad IC, an EEPROM, and a graphics LCD can coexist on one I2C bus. Industrial -40 °C to +85 °C temperature rating and the compact 8x8 mm QFN footprint allow the MCU to sit behind a sealed membrane keypad in factory-automation cabinets. Recommended companion: PIC18F46K22 for higher-end HMI needing more RAM.
Recommended
USB-to-UART Bridge
Engineers often pair the PIC18F44J10T-I/ML with an external USB-to-UART bridge IC to build debug or field-communication modules. Its two USARTs (one enhanced with LIN master) and 40 MHz MIPS handle bidirectional serial traffic without CPU saturation. The 16 KB Flash is sufficient for command-set interpreters and protocol converters (RS-232, RS-485, LIN). Operating from 3.3 V with 5.5 V tolerant I/O, the J10 connects directly to legacy RS-232 transceivers and to USB bridges like MCP2200 or MCP2221A without glue logic. Recommended companion: MCP2200 for USB 2.0 full-speed CDC bridge.
Recommended
Sensor Hub with LIN Bus
Automotive and industrial sensor hubs use the PIC18F44J10T-I/ML's enhanced USART with LIN 1.3 master capability to poll remote sensor nodes over a single-wire LIN bus. The hardware LIN state machine and auto-baud detection reduce firmware overhead, freeing CPU cycles for sensor data fusion. With 13 ADC channels, the J10 reads a local analog sensor array while simultaneously running LIN master arbitration. Its 2.0 V to 3.6 V supply simplifies battery-backed sensor boards. Recommended companion: MCP202 LIN transceiver for the physical layer.
Recommended
Low-Cost Graphic LCD Controller
The PIC18F44J10T-I/ML drives character and small graphic LCDs (up to 128x64 pixels) using SPI master mode on its MSSP peripherals - one MSSP drives the LCD controller IC, the other handles touch or keypad input. The 40 MHz CPU keeps the frame refresh loop tight at under 10 ms, while the 2 KB SRAM buffers a full frame in monochrome. Its 36 I/O pins map directly to common 8-bit parallel LCD interfaces for legacy panels, and the small 8x8 mm QFN leaves board space for backlight driver and capacitive touch ICs. Recommended companion: ST7565R for monochrome graphic LCD.
Recommended
Embedded Data Logger
Battery-powered data loggers benefit from the PIC18F44J10T-I/ML's nanoWatt Technology power management and wide 2.0-3.6 V supply range. Sleep current drops below 1 µA with peripherals gated, enabling multi-year coin-cell operation when sampling once per minute. The 10-bit ADC samples up to 13 analog channels with internal bandgap reference, while one MSSP writes data to a SPI FRAM or SD card over the second MSSP. The 44-QFN's small footprint suits wearable or remote telemetry form factors. Recommended companion: MRAM or SPI FRAM for non-volatile logging buffer.
Recommended
Consumer Appliance with Serial Connectivity
Small kitchen, HVAC, and white-goods appliances integrate the PIC18F44J10T-I/ML to add Wi-Fi or Bluetooth co-processor control via UART. The MCU runs the user interface (LEDs, buttons, buzzer, relay drivers) while a connected module (ESP32, RN4870) handles the wireless link. The J10's 36 I/O directly source LED indicators and sink TRIAC optos for mains switching via zero-cross detectors. Industrial -40 °C to +85 °C temperature rating survives hot attic or boiler-room installations. Recommended companion: ESP32-WROOM-32 for Wi-Fi/BT co-processor.
Recommended
IoT Sensor Node with SPI Display
The PIC18F44J10T-I/ML acts as the local intelligence in IoT sensor nodes that pair an SPI environmental sensor (BME280, SCD30) with a small OLED display for local read-out. Its two MSSP ports split between sensor SPI bus and display SPI bus, both running at 10 MHz without CPU stall. nanoWatt sleep modes drop idle current under 1 µA, supporting year-long battery deployments. The 5.5 V tolerant I/O accepts industrial sensor output levels without level translation. Recommended companion: BME280 for combined temperature/humidity/pressure sensing.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F44J10T-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F44J10-I/ML | PIC18F4410T-I/ML | PIC18F4420T-I/ML | PIC18F4458T-I/ML | PIC18F4450T-I/ML | PIC18F4439T-I/ML |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin QFN (8x8 mm) | 44-pin QFN (8x8 mm) - same | 44-pin QFN (8x8 mm) - same | 44-pin QFN (8x8 mm) - same | 44-pin QFN (8x8 mm) - same | 44-pin QFN (8x8 mm) - same | 44-pin QFN (8x8 mm) - same |
| Program Memory (Flash) | 16 KB | 16 KB | 16 KB | 32 KB | 24 KB | 32 KB | 24 KB |
| Maximum Frequency | 40 MHz (10 MIPS) | 40 MHz | 40 MHz | 40 MHz | 48 MHz | 48 MHz | 40 MHz |
| I/O Pins | 36 | 36 | 36 | 36 | 34 | 34 | 34 |
| USB Peripheral | No | No | No | No | Yes (USB 2.0 FS) | Yes (USB 2.0 FS) | No |
| LIN Bus USART | Yes (1x enhanced USART) | Yes | Yes | Yes | Yes | Yes | Yes |
| ECCP / PWM Outputs | 1x ECCP, 2x CCP | 1x ECCP, 2x CCP | 1x ECCP, 2x CCP | 1x ECCP, 2x CCP | 1x ECCP, 2x CCP | 1x ECCP, 2x CCP | 3x ECCP, 3x CCP (motor control) |
| Approx. Unit Price @ 1k | USD 2.78 | USD 2.70 (tube) | USD 3.05 | USD 3.40 | USD 3.95 | USD 3.85 | USD 4.10 |
Key Differentiators
- 5.5 V tolerant digital I/O on a 3.3 V core MCU (vs PIC18F46K22)
- Industrial temperature range in compact 8x8 mm QFN (vs PIC18F25K50)
- LIN-capable enhanced USART at 10 MIPS price point (vs PIC18F4550)
Design Notes
The PIC18F44J10T-I/ML operates from 2.0 V to 3.6 V with full 40 MHz guaranteed at 3.0 V to 3.6 V. Place a 0.1 µF ceramic decoupling capacitor within 3 mm of every VDDx pin (1, 11, 25, 38) and a single 10 µF bulk tantalum or ceramic capacitor near the QFN package. The exposed pad (pin 45) MUST be soldered to a contiguous ground plane with at least 4 thermal vias (0.3 mm drill, 0.6 mm pad) to meet the 200 mA per-port I/O current budget. For sleep-mode data-logger designs, the nanoWatt Technology Sleep mode draws under 1 µA with RTCC active - confirm via Microchip TB3017 application note.
The 44-pin QFN (8x8 mm) uses a 0.65 mm pitch and requires IPC-7351 nominal land pattern with 0.30 mm pad width and 0.45 mm pad length. Place a continuous ground plane beneath the package; do NOT route signals under the exposed pad. Keep the ICSP clock (RB6/PGC) and ICSP data (RB7/PGD) traces under 50 mm and avoid crossing high-current switching nets. For EMI-sensitive designs, place a 4.7 kΩ pull-up on MCLR (pin 44) and route the trace directly to the programming connector without stubs. Refer to Microchip AN248 for QFN PCB layout guidance.
Three pitfalls engineers encounter: (1) Assuming the J10 is 5 V tolerant at the core - only I/O pins accept 5 V; the VDD must stay at 3.6 V max. (2) Drawing more than 25 mA per I/O pin or 200 mA per port - the PIC18F45J10 datasheet clamps per-pin at 25 mA and per-port at 200 mA, with absolute max 200 mA across all ports; exceeding this triggers latch-up. (3) Driving capacitive loads > 50 pF on a CCP/PWM output without a series resistor - high dV/dt can inject substrate noise. Add a 33 Ω series resistor on PWM outputs driving FET gates.
For SPI buses running at 10 MHz or higher on MSSP1, place 22-33 Ω series damping resistors within 5 mm of the source pin to suppress ringing on long traces. Add 4.7 kΩ pull-ups on SCL1/SDA1 (RC3/RC4) for reliable I2C at 400 kHz Fast-Mode. The I2C address-masking feature of MSSP1 simplifies multi-slave addressing - configure via the SSP1ADD register per Microchip DS39682A section 16. For LIN bus implementations, ensure the LIN transceiver (MCP202) TXD pin can drive the enhanced USART TX1 (RC6) output without inverting logic levels.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - choose PIC18F45J10-I/PT or PIC18F46J13-I/ML automotive variants for vehicle applications. Halogen-free status not explicitly stated in verified data.
