PIC18F44J11T-I/ML - 48MHz 8-bit MCU, 16KB Flash, 44-QFN
MPN: PIC18F44J11T-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.1 | $4.10 |
| 10 | $3.55 | $35.50 |
| 100 | $2.85 | $285.00 |
| 500 | $2.45 | $1,225.00 |
| 1,000 | $2.1 | $2,100.00 |
| 3,000 | $1.85 | $5,550.00 |
PIC18F44J11T-I/ML Overview
What is an 8-bit microcontroller? An 8-bit MCU is a self-contained computing IC that executes instructions on 8-bit data paths and integrates CPU, Flash program memory, RAM, peripherals (timers, ADC, communication interfaces), and I/O in a single chip. 8-bit MCUs sit within the broader taxonomy of microcontrollers -> embedded controllers -> semiconductor ICs. PIC18 devices specifically use Microchip's enhanced Harvard RISC architecture targeting cost-sensitive and low-power embedded designs.
Key features of the PIC18F44J11 include a 10-bit ADC with up to 13 input channels, two UART modules, two SPI/I2C-capable MSSP peripherals, two analog comparators, a hardware RTCC, and the Peripheral Pin Select (PPS) feature that allows digital peripheral I/O to be remapped to a wide set of physical pins. Deep Sleep mode current is specified in the nanoWatt XLP family at extremely low microamp levels, making the part attractive for battery-powered designs.
Architecturally the PIC18F44J11 combines an enhanced RISC core with internal 31 kHz-48 MHz oscillator options including an 8MHz HFINTOSC with PLL, on-chip 16 KB self-programmable Flash, and 4 KB SRAM, with deep sleep and run-time configurable oscillator switching. The ICSP (In-Circuit Serial Programming) and ICD (In-Circuit Debug) interfaces are exposed on dedicated pins, enabling production programming and field debugging through Microchip's MPLAB toolchain.
Typical applications include USB/HID human-interface peripherals (when paired with a USB transceiver), consumer appliances, industrial control front-ends, low-cost sensor hubs, and battery-powered metering devices where deep sleep current and integrated AFE reduce BOM. The wide operating voltage range and 36 I/O count also suit multi-channel acquisition boards and protocol bridges.
When designing with this part, ensure the 44-QFN exposed pad is soldered to a sufficient copper pour to meet the package thermal resistance specification, choose decoupling values per the datasheet's recommended capacitor network, and reserve RB0/RB1/RB6/RB7 (or their PPS alternatives) for ICSP/ICD during layout. The 'T' in the suffix indicates Tape and Reel packaging and the 'I' indicates the -40C to +85C industrial temperature range.
Drop-in alternatives for PIC18F44J11T-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 PIC18F44J11T-I/ML (same form factor and footprint) — differing in Package, ADC, Core Architecture, Operating Temperature, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F44J11-I/ML
✅ Drop-In✓ In Stock
$1.85 / Unit
View Datasheet →PIC18F46J11-I/ML
✅ Drop-In✓ In Stock
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View Datasheet →PIC18F45J11-I/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.25 / Unit
View Datasheet →PIC18F46J50-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F44J10-I/ML
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F44K22-I/ML
✅ Drop-In✓ In Stock
$2.1 / Unit
View Datasheet →PIC18F44J11T-I/ML Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 8-bit RISC (Harvard) |
| Program Memory (Flash) | 16 KB (8K x 16) |
| Data RAM | 4 KB |
| Maximum CPU Speed | 48 MHz (12 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| I/O Voltage Domain | 4.2 V to 5.5 V (5V tolerant I/O) |
| Digital I/O Pins | 36 |
| ADC | 10-bit, up to 13 channels |
| Package | 44-pin QFN with exposed pad (8 mm x 8 mm) |
| Operating Temperature | -40 C to +85 C (Industrial) |
| UART | 2 |
| SPI / I2C (MSSP) | 2 |
| Analog Comparators | 2 |
| Peripheral Pin Select (PPS) | Yes |
| Deep Sleep Current | nanoWatt XLP low-power mode |
| ICSP / ICD Debug | Yes (RB0/1/6/7 or PPS) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC18F44J11T-I/ML Pin Configuration
| Pin 1 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Pin 2 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Pin 3 | RA2/AN2/VREF- — PORTA bit 2 / Analog input 2 / ADC VREF- |
| Pin 4 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / ADC VREF+ |
| Pin 5 | RA4/AN4 — PORTA bit 4 / Analog input 4 |
| Pin 6 | RA5/AN5 — PORTA bit 5 / Analog input 5 |
| Pin 7 | RA6 — PORTA bit 6 |
| Pin 8 | RA7 — PORTA bit 7 |
| Pin 9 | VSS — Digital ground |
| Pin 10 | VDD — Positive digital supply |
| Pin 11 | RB0/INT0 — PORTB bit 0 / External interrupt 0 |
| Pin 12 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| Pin 13 | RB2/INT2 — PORTB bit 2 / External interrupt 2 |
| Pin 14 | RB3/INT3 — PORTB bit 3 / External interrupt 3 |
| Pin 15 | RB4 — PORTB bit 4 |
| Pin 16 | RB5 — PORTB bit 5 |
| Pin 17 | RB6/ICSPCLK — PORTB bit 6 / ICSP clock |
| Pin 18 | RB7/ICSPDAT — PORTB bit 7 / ICSP data |
| Pin 19 | RC0 — PORTC bit 0 |
| Pin 20 | RC1 — PORTC bit 1 |
| Pin 21 | RC2 — PORTC bit 2 |
| Pin 22 | RC3 — PORTC bit 3 |
| Pin 23 | RC4 — PORTC bit 4 |
| Pin 24 | RC5 — PORTC bit 5 |
| Pin 25 | RC6 — PORTC bit 6 |
| Pin 26 | RC7 — PORTC bit 7 |
| Pin 27 | VSS — Digital ground |
| Pin 28 | VDD — Positive digital supply |
| Pin 29 | RD0 — PORTD bit 0 |
| Pin 30 | RD1 — PORTD bit 1 |
| Pin 31 | RD2 — PORTD bit 2 |
| Pin 32 | RD3 — PORTD bit 3 |
| Pin 33 | RD4 — PORTD bit 4 |
| Pin 34 | RD5 — PORTD bit 5 |
| Pin 35 | RD6 — PORTD bit 6 |
| Pin 36 | RD7 — PORTD bit 7 |
| Pin 37 | RE0 — PORTE bit 0 |
| Pin 38 | RE1 — PORTE bit 1 |
| Pin 39 | RE2 — PORTE bit 2 |
| Pin 40 | VSS — Digital ground |
| Pin 41 | VDD — Positive digital supply |
| Pin 42 | VSS — Digital ground |
| Pin 43 | OSC1 — Crystal oscillator input |
| Pin 44 | OSC2 — Crystal oscillator output |
Typical Applications
PIC18F44J11T-I/ML is suitable for 6 applications: USB HID Human Interface Devices, Industrial Sensor Hubs, Battery-Powered Remote Sensor Nodes, Consumer Appliance Control Boards, Multi-Channel Data Acquisition Front-Ends, Protocol Bridges and Converters.
USB HID Human Interface Devices
The PIC18F44J11T-I/ML's 48MHz PIC18 core, 36 digital I/O and integrated USB-ready peripheral set make it a strong fit for HID devices like keyboards, mice, and game controllers. The 16KB of Flash holds USB stacks and HID descriptors, while 4KB RAM buffers incoming HID reports. Its nanoWatt XLP deep-sleep current lowers battery drain on wireless peripherals, and the 5V-tolerant I/O simplifies interfacing with legacy sensors. Pair the MCU with a USB transceiver IC and Microchip's free USB framework to shorten HID firmware development.
Recommended
Industrial Sensor Hubs
Industrial sensor hubs demand a fast ADC, many I/O, and rugged industrial temperature support - all met by the PIC18F44J11T-I/ML. The 10-bit ADC with up to 13 channels digitizes sensor signals at sample rates suitable for vibration, temperature, and pressure monitoring. With 36 I/O, the part can drive status LEDs, communicate over RS-232/RS-485 via two UARTs, and connect to SPI/I2C sensors through two MSSP modules. Its -40C to +85C industrial temperature rating supports factory automation cabinets and outdoor enclosures.
Recommended
Battery-Powered Remote Sensor Nodes
The PIC18F44J11T-I/ML is built on nanoWatt XLP technology, making it ideal for battery-powered wireless sensor endpoints. Deep sleep currents in the nanoamp range extend coin-cell and lithium-pack life across multi-year deployment scenarios. The 2.0V-3.6V VDD range lets the part run directly from a single lithium or two AA cells without a boost regulator. Peripheral Pin Select (PPS) gives flexibility to assign UART/SPI to any I/O, simplifying board layout for compact remote nodes.
Recommended
Consumer Appliance Control Boards
In consumer appliances such as washers, dishwashers, and small kitchen devices, the PIC18F44J11T-I/ML provides a balance of cost-effective 8-bit computation and rich peripherals. Two UARTs can drive display modules or communicate with inverter motor controllers, while the MSSP peripherals interface to EEPROMs and capacitive touch ICs. The Peripheral Pin Select feature lets designers re-route signals to simplify PCB routing in space-constrained enclosures, and the wide 2.0V-3.6V supply range supports direct Li-ion operation.
Recommended
Multi-Channel Data Acquisition Front-Ends
With a 10-bit ADC and up to 13 analog input channels, the PIC18F44J11T-I/ML is well suited to multi-channel data acquisition front-ends in test and measurement, HVAC, and small-scale process control. Its 48MHz core converts ADC samples fast enough for audio-bandwidth monitoring of multiple channels, and the 4KB SRAM can buffer 1024 10-bit samples per channel before main-loop processing. The 44-QFN footprint keeps the front-end compact while still exposing 36 digital I/O for relays and indicator LEDs.
Recommended
Protocol Bridges and Converters
The PIC18F44J11T-I/ML is widely deployed as a low-cost protocol bridge - for example UART to SPI, I2C to UART, or RS-232 to RS-485 conversion. Two UARTs and two MSSP peripherals provide independent physical interfaces on both sides of the bridge, while 36 I/O give ample pins for status LEDs, control lines, and flow-control signals. The nanoWatt XLP feature set lets bridge nodes enter sleep between transactions, lowering standby current in always-on panels.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F44J11T-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F44J11-I/ML | PIC18F46J11-I/ML | PIC18F45J11-I/ML | PIC18F46J50-I/ML | PIC18F44J10-I/ML | PIC18F44K22-I/ML |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-QFN (8x8mm) ML | 44-QFN (8x8mm) ML - same | 44-QFN - same | 44-QFN - same | 44-QFN - same | 44-QFN - same | 44-QFN - same |
| Flash Memory | 16 KB | 16 KB | 64 KB | 32 KB | 64 KB | 16 KB | 16 KB |
| RAM | 4 KB | 4 KB | 4 KB | 4 KB | 3.8 KB | 4 KB | 4 KB |
| Max CPU Speed | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 40 MHz (10 MIPS) | 64 MHz (16 MIPS) |
| Supply Voltage (VDD) | 2.0V to 3.6V | 2.0V to 3.6V | 2.0V to 3.6V | 2.0V to 3.6V | 2.0V to 3.6V | 2.0V to 3.6V | 2.3V to 5.5V |
| USB Peripheral | External required | External required | External required | External required | Integrated USB 2.0 FS | External required | External required |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Approx Unit Price (qty 1) | $4.10 | $4.10 (same die, tray) | ~$5.50 (more Flash) | ~$4.80 (more Flash) | ~$6.00 (USB + 64KB) | ~$3.85 (lower MIPS) | ~$2.80 (K-series mass volume) |
Key Differentiators
- 16KB Flash in 44-QFN with deep sleep nanoWatt XLP (vs PIC18F25K80-I/SS)
- Peripheral Pin Select (PPS) on 36 I/O (vs PIC18F26K22-I/SP)
- 5V-tolerant I/O with 3.3V core (vs PIC18F46K22-I/ML)
Design Notes
The 44-QFN exposed thermal pad must be soldered to a continuous PCB ground copper pour of at least 1 sq inch to meet the datasheet's thermal resistance spec and to provide the lowest-impedance return path for the digital I/O. Use an array of thermal vias under the pad (typically 0.3mm drill, 1.0mm pitch, plugged or tented on the opposite side) to transfer heat into inner planes.
Place a 100nF decoupling capacitor as close as possible to every VDD pin, with a 10uF bulk capacitor on the main supply rail within 25mm of the MCU. The 2.0V-3.6V rail benefits from a low-quiescent LDO such as the MCP1700 to maximize nanoWatt XLP deep-sleep savings - quiescent current of the regulator becomes part of the system sleep budget and should be <1uA for true low-power nodes.
Reserve RB6 (ICSPCLK) and RB7 (ICSPDAT) on the production PCB. Pull-ups or pull-downs on these pins can interfere with programming/debug unless their drive strength allows the programmer to override them. Failing to expose these pins adds rework cost when firmware needs to be updated on assemblies already in the field.
Route the analog inputs (RA0-RA5) with parallel ground tracks and a guard ring when high-impedance. The 10-bit ADC performance is sensitive to switching-noise coupling from nearby digital lines - keep UART and SPI traces 3-5mm away from analog traces and route them on adjacent layers with a ground plane between them.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - automotive applications should consider PIC18F family variants with AEC-Q100 rating.
