PIC18F46J11T-I/PT - 64KB Flash 8-bit MCU TQFP-44 | Microchip
MPN: PIC18F46J11T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.4 | $8.40 |
| 10 | $7.55 | $75.50 |
| 100 | $6.85 | $685.00 |
| 500 | $6.2 | $3,100.00 |
| 1,000 | $5.65 | $5,650.00 |
PIC18F46J11T-I/PT Overview
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (Flash/ROM), data memory (RAM), and peripherals on one die. Within the MCU taxonomy, the PIC18F46J11 belongs to the 8-bit PIC family, sits below the 16-bit dsPIC and PIC24 families, and above 4-bit legacy controllers; it is categorized as a general-purpose, low-power (nanoWatt XLP) embedded controller targeting cost-sensitive consumer and industrial designs.
Key features include Peripheral Pin Select (PPS) for flexible signal routing, a Charge Time Measurement Unit (CTMU) for capacitive touch and precise time measurement, two MSSP (SPI/I2C) ports, two USART modules, a 12-bit A/D with up to 13 channels, deep-sleep current in the nanoampere range, and an internal 31 kHz to 8 MHz oscillator with PLL. The 44-pin TQFP exposes up to 36 digital I/O lines plus dedicated analog and timer pins, giving designers generous headroom for mixed-signal designs.
Architecturally, the PIC18F46J11 uses a Harvard-style RISC core with a single-cycle 16-bit instruction word, 8-bit data path, hardware multiply, and a 16-level hardware stack. Its nanoWatt XLP technology enables deep-sleep currents below 1 uA with RTC retention, making it suitable for battery-powered endpoints where energy harvesting or coin-cell operation is required. PPS allows remapping of digital peripherals onto most I/O pins post-reset, simplifying PCB routing and BOM changes late in the design cycle.
Typical applications include USB/HID human-interface devices, capacitive-touch user panels, low-cost graphic LCD controllers, sensor-hub aggregation nodes, white-goods motor control, and industrial CAN-LIN gateway bridge nodes. It is also widely used as a connectivity companion (I2C/SPI slave) to higher-end MCUs in IoT appliances, and as a general-purpose platform in university embedded courses due to its free MPLAB X IDE toolchain.
When designing with the PIC18F46J11, observe the dual-rail requirement: VBAT/Vddcore from 2.0V to 3.6V plus a separate I/O rail. Decouple both rails with 100 nF plus bulk capacitance placed within 5 mm of each supply pin, and respect the analog/digital Vss split to keep ADC SNR within datasheet limits. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not collected in a single place on the manufacturer datasheet.
Drop-in alternatives for PIC18F46J11T-I/PT — 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 PIC18F46J11T-I/PT (same form factor and footprint) — differing in Package, ADC, Core Architecture, I/O Pins, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F46J11-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F45J11T-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F46J50T-I/PT
✅ Drop-In✓ In Stock
$4.42 / Unit
View Datasheet →PIC18F46K22-I/PT
✅ Drop-In✓ In Stock
$2.32 / Unit
View Datasheet →PIC18F46K42-I/PT
✅ Drop-In✓ In Stock
$1.89 / Unit
View Datasheet →PIC18F46J11T-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 (8-bit RISC, enhanced Harvard) |
| Program Memory (Flash) | 64 KB (32K x 16 words) |
| Data RAM | 4 KB |
| Maximum CPU Speed | 48 MHz (12 MIPS) |
| Supply Voltage (VDD core) | 2.0 V to 3.6 V |
| I/O Pin Tolerance (5V tolerant) | Up to 5.5 V on digital I/O |
| Digital I/O Pins | 36 (varies by package) |
| A/D Converter | 12-bit, up to 13 input channels |
| Communication Interfaces | 2x MSSP (SPI/I2C), 2x USART (EUSART) |
| Timers | 5x 8/16-bit with capture/compare |
| PWM Outputs | Up to 5 channels (ECCP + CCP) |
| Special Features | PPS, CTMU, nanoWatt XLP, Deep Sleep, internal oscillator with PLL |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Package | 44-pin TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
PIC18F46J11T-I/PT Pin Configuration
| Pin 1 | RB3/AN9/C1INA/CCP2A — PORTB bit 3 / analog input 9 / comparator input / CCP2 output |
| Pin 2 | RB2/AN8/C1INB — PORTB bit 2 / analog input 8 / comparator input |
| Pin 3 | RB1/AN7/C1INC — PORTB bit 1 / analog input 7 / comparator input |
| Pin 4 | RB0/AN6 — PORTB bit 0 / analog input 6 |
| Pin 5 | VSS — Ground reference for digital I/O |
| Pin 6 | VDD — Digital I/O supply (2.0V to 3.6V) |
| Pin 7 | RA0/ANO — PORTA bit 0 / analog input 0 |
| Pin 8 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Pin 9 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| Pin 10 | RA3/AN3 — PORTA bit 3 / analog input 3 |
| Pin 11 | RA4/AN4/T0CKI — PORTA bit 4 / analog input 4 / Timer0 clock input |
| Pin 12 | RA5/AN5 — PORTA bit 5 / analog input 5 |
| Pin 13 | VDDCORE — Regulated core supply output (1.8V to 3.6V) |
| Pin 14 | ENVREG — Internal voltage regulator enable |
| Pin 15 | RD0/PMD0 — PORTD bit 0 / PSP/EMUC data bit 0 |
| Pin 16 | RD1/PMD1 — PORTD bit 1 / PSP/EMUC data bit 1 |
| Pin 17 | RD2/PMD2 — PORTD bit 2 / PSP/EMUC data bit 2 |
| Pin 18 | RD3/PMD3 — PORTD bit 3 / PSP/EMUC data bit 3 |
| Pin 19 | RC4/SDA1/SDI1 — PORTC bit 4 / I2C SDA / SPI1 data in |
| Pin 20 | RC5/SCL1/SCK1 — PORTC bit 5 / I2C SCL / SPI1 clock |
| Pin 21 | RC6/TX1/CK1 — PORTC bit 6 / USART1 TX / clock out |
| Pin 22 | RC7/RX1/DT1 — PORTC bit 7 / USART1 RX / data in |
| Pin 23 | RD4/PMD4/SDO2 — PORTD bit 4 / PSP data bit 4 / SPI2 data out |
| Pin 24 | RD5/PMD5/SDI2 — PORTD bit 5 / PSP data bit 5 / SPI2 data in |
| Pin 25 | RD6/PMD6/SCK2 — PORTD bit 6 / PSP data bit 6 / SPI2 clock |
| Pin 26 | RD7/PMD7/SS2 — PORTD bit 7 / PSP data bit 7 / SPI2 slave select |
| Pin 27 | VSS — Ground reference (second) |
| Pin 28 | VDD — Digital I/O supply (second) |
| Pin 29 | RE0/PMRD/P2D — PORTE bit 0 / PSP read strobe / PWM2 D |
| Pin 30 | RE1/PMWR/P2C — PORTE bit 1 / PSP write strobe / PWM2 C |
| Pin 31 | RE2/PMCS/P2B — PORTE bit 2 / PSP chip select / PWM2 B |
| Pin 32 | AVDD — Analog supply (must equal VDD) |
| Pin 33 | AVSS — Analog ground reference |
| Pin 34 | RA6/CLKO/OSC2 — PORTA bit 6 / system clock output / crystal OSC2 |
| Pin 35 | RA7/CLKI/OSC1 — PORTA bit 7 / system clock input / crystal OSC1 |
| Pin 36 | RC0/T1CKI — PORTC bit 0 / Timer1 clock input |
| Pin 37 | RC1/CCP2 — PORTC bit 1 / CCP2 PWM/capture/compare |
| Pin 38 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM/capture/compare |
| Pin 39 | RC3/INT0 — PORTC bit 3 / external interrupt 0 |
| Pin 40 | MCLR — Master Clear (active-low reset) / programming voltage input |
| Pin 41 | RB4/CCP3 — PORTB bit 4 / CCP3 output |
| Pin 42 | RB5 — PORTB bit 5 |
| Pin 43 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 44 | RB7/PGD — PORTB bit 7 / ICSP data |
Typical Applications
PIC18F46J11T-I/PT is suitable for 7 applications: Capacitive Touch User Interface, Low-Power Wireless Sensor Hub, White-Goods and Appliance Control Board, Industrial IoT Edge Node, Graphical LCD and Segment Display Controller, USB HID Peripheral Device, Battery Charger and Power Management Front-End.
Capacitive Touch User Interface
The PIC18F46J11T-I/PT is an ideal host for capacitive touch panels because its integrated CTMU (Charge Time Measurement Unit) provides sub-nanosecond timing resolution for measuring capacitance changes as low as femtofarads. With up to 13 ADC channels and PPS, the designer can route touch sensor lines to any spare I/O pin without remapping the PCB. The 12 MIPS throughput handles debounce, gesture decoding, and slider/wheel algorithms in firmware, while nanoWatt XLP keeps sleep current below 1 uA between touch events for battery-powered remote controls, white-goods control panels, and IoT wall switches. Compared with discrete touch controllers, integrating the MCU saves $0.30 to $0.80 BOM cost per node.
Recommended
Low-Power Wireless Sensor Hub
The PIC18F46J11T-I/PT's nanoWatt XLP technology makes it a strong choice for wireless sensor hubs that spend most of their life in deep-sleep and only wake on interrupt or RTCC. With deep-sleep current below 1 uA and a wake-up time under 10 us, the MCU can be paired with sub-GHz transceivers (SX1276, CC1101) to build battery-life-optimized LoRa or 6LoWPAN nodes that last 10+ years on 2x AA cells. The 5V-tolerant I/O allows direct connection to industrial 5V analog sensors without level shifters. PPS and CTMU extend the platform with optional flow, temperature, and humidity sensing on the same PCB without redesign.
Recommended
White-Goods and Appliance Control Board
In white-goods control boards (washing machines, dishwashers, induction cookers, microwaves), the PIC18F46J11T-I/PT delivers the right mix of 12 MIPS throughput, 64 KB of Flash for motor-control firmware, and 36 digital I/O lines for driving relays, triacs, and seven-segment displays. Its 5V-tolerant I/O interfaces directly with legacy 5V sensor and keypad subsystems still common in appliance designs, and the PWM/ECCP blocks handle brushless DC or universal motor control. The industrial temperature grade (-40C to +85C) and 25+ year Microchip supply continuity make it a long-life platform for major appliance brands.
Recommended
Industrial IoT Edge Node
The PIC18F46J11T-I/PT sits comfortably at the edge of industrial networks, aggregating Modbus RTU, I2C sensor, and analog inputs before forwarding over RS-485, CAN, or a wireless module. Its two USARTs and two MSSP ports handle multiple fieldbuses simultaneously, while the 12-bit ADC reads thermocouples, 4-20 mA loops, and 0-10 V analog sensors with 1 mV typical resolution. The PPS remapping capability lets designers re-route peripheral pins late in the PCB layout cycle when EMI compliance issues force a redesign. Deep-sleep current below 1 uA keeps energy-harvested or battery-backed edge nodes alive for years.
Recommended
Graphical LCD and Segment Display Controller
Driving 128x64 graphic LCDs, TFT modules, or large multi-digit seven-segment displays requires sustained I/O throughput and PWM channels for backlight/contrast control. The PIC18F46J11T-I/PT drives these displays over SPI or 8-bit parallel at refresh rates well above 60 Hz with margin for animated icons, menus, and waveform plots. Its 4 KB RAM holds full-frame display buffers for 128x64 monochrome LCDs without external memory. The 5V-tolerant I/O allows direct drive of common LCD modules specified at 5V logic, while the 3.3V core keeps MCU power dissipation low.
Recommended
USB HID Peripheral Device
When the PIC18F46J11T-I/PT is paired with an external USB transceiver such as the MCP2210 or an FTDI bridge, it can implement low-cost USB HID peripherals - keyboards, mice, HID-class custom controls, and game controllers - at a fraction of the cost of dedicated USB MCUs. The two USARTs and two MSSP peripherals manage USB signalling, status LEDs, key-scanning matrix, and SPI flash storage for macros. The 64 KB Flash accommodates full USB descriptor tables, HID report handlers, and application firmware in one chip, while PPS allows flexible PCB routing of USB D+/D- and indicator LEDs.
Recommended
Battery Charger and Power Management Front-End
The PIC18F46J11T-I/PT's 12-bit ADC, PWM channels, and 5V-tolerant I/O make it a flexible front-end for multi-chemistry battery chargers, solar charge controllers, and uninterruptible power supply monitors. The ADC reads battery voltage, charge current, and temperature inputs with 1 mV resolution, while the ECCP/CCP PWM outputs drive buck, boost, or synchronous rectification MOSFET bridges. NanoWatt XLP deep-sleep keeps standby losses negligible in always-on systems, and the wide operating temperature range supports outdoor solar deployments. Designers often pair the 'J11 with companion half-bridge drivers (e.g., MCP14A0901) for high-current solar MPPT stages.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F46J11T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F46J11-I/PT | PIC18F45J11T-I/PT | PIC18F46J50T-I/PT | PIC18F46K22-I/PT | PIC18F46K42-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin TQFP (10x10 mm) | 44-pin TQFP - same | 44-pin TQFP - same | 44-pin TQFP - same | 44-pin TQFP - same | 44-pin TQFP - same |
| Flash Memory | 64 KB | 64 KB | 32 KB | 64 KB | 64 KB | 64 KB |
| RAM | 4 KB | 4 KB | 4 KB | 4 KB | 3.8 KB | 8 KB |
| Max CPU Speed | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS |
| USB Support | No | No | No | Yes (USB 2.0 FS) | No | No |
| NanoWatt XLP / Deep Sleep | Yes (< 1 uA) | Yes (< 1 uA) | Yes (< 1 uA) | Yes (< 1 uA) | No XLP | No XLP |
| Peripheral Pin Select (PPS) | Yes | Yes | Yes | Yes | No | Yes |
| Core Architecture | PIC18 J-series (3.3V, 5V-tolerant I/O) | PIC18 J-series - same | PIC18 J-series - same | PIC18 J-series - same | PIC18 K-series (5V) | PIC18 K-series (5V) |
Key Differentiators
- NanoWatt XLP deep-sleep < 1 uA (vs PIC18F46K22-I/PT)
- Native 5V-tolerant I/O on 3.3V core (vs PIC18F46K42-I/PT)
- Peripheral Pin Select for flexible routing (vs PIC18F46K22-I/PT)
- Integrated CTMU for capacitive touch (vs PIC18F46K42-I/PT)
Design Notes
The PIC18F46J11T-I/PT uses a dual-rail supply scheme: VDD supplies the I/O ring (2.0V to 3.6V) and VDDCORE is regulated internally to power the CPU core. Place a 100 nF X7R decoupling capacitor within 5 mm of each VDD/VDDCORE/AVDD pin, and add a 10 uF bulk capacitor near the supply entry point. Hold ENVREG (pin 14) low in normal operation to enable the internal regulator. When using the internal regulator, VDDCORE must NOT be driven externally - only a bulk capacitor is required on that pin. AVDD must be tied to VDD to maintain ADC accuracy.
Do not exceed 3.6V on VDD or 5.5V on any digital I/O pin (the I/O is 5V-tolerant on the J-series, but VDD itself is not). Brown-out and watchdog timer configuration must be reviewed in every revision - a missing BOR can cause Flash corruption on slow-rising supplies. The MCLR pin (40) is mandatory on production boards even when not used for reset; leave it tied through a 10 kohm pull-up to VDD to prevent spurious resets from EMI.
Estimated: at maximum 48 MHz operation with 3.6V VDD and all 36 I/O pins driving 10 mA capacitive loads, the PIC18F46J11T-I/PT dissipates roughly 100 mW internally, well within the TQFP-44 thermal envelope (theta_JA ~ 50 C/W on a 4-layer JEDEC test board). The dominant thermal load in typical applications is the I/O output drive current; cap the total source/sink current per PORT to the datasheet limits (e.g. 200 mA per PORTB) and to 250 mA for the whole chip to avoid tripping thermal protection.
Route the analog AVSS/AVDD pair as a Kelvin connection back to the supply via separate traces, and keep the AVDD decoupling within 3 mm of the package. The ICSP/ICD pins (RB6/PGC, RB7/PGD, MCLR) must be accessible on the PCB - Microchip recommends adding a 6-pin 0.1-inch header or test pads for field upgrades. Place the ICSP connector on the board edge to avoid having to disassemble the enclosure for firmware updates.
Compliance Information
RoHS compliant per Microchip product page. Industrial temperature grade (-40C to +85C). AEC-Q100 not applicable - this is a consumer/industrial-grade MCU; automotive customers should select PIC18F46J11-I/PT qualified variants or move to dsPIC33 or PIC32 families.