PIC18F65J50-I/PT - 8-Bit 48MHz USB MCU 32KB Flash 64-TQFP | Microchip
MPN: PIC18F65J50-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.22 | $5.22 |
| 10 | $4.78 | $47.80 |
| 100 | $4.21 | $421.00 |
| 500 | $3.62 | $1,810.00 |
| 1,000 | $3.1 | $3,100.00 |
PIC18F65J50-I/PT Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, program and data memory, peripherals, and I/O. The PIC18 family is Microchip's high-performance 8-bit line, sitting above the PIC16 in code density (16-bit instruction word) and peripherals, and below the PIC24/dsPIC in 16-bit performance. The "J" sub-family specifically uses 3.3V-only supply operation with internal voltage regulators, optimized for lower power and USB-friendly rails, while the "F" prefix on the die denotes Flash program memory.
Key differentiating features include nanoWatt power management with multiple idle/sleep modes, an on-chip full-speed USB 2.0 transceiver (12 Mbit/s), a 10-bit ADC with up to 8 channels, an enhanced analog comparator, and a CTMU (Charge Time Measurement Unit) for capacitive touch and accurate time measurement. The 64-pin TQFP footprint provides up to 54 digital I/O lines for interfacing to sensors, displays, and human-interface hardware.
Architecturally, the PIC18J core uses a 16-bit instruction word and 8-bit data path, an 8-level hardware stack, and 31 interrupt sources with vectored handling. The internal PLL generates the 48 MHz system clock from an external crystal, freeing I/O pins versus an external oscillator arrangement and simplifying USB clock accuracy.
Typical applications include USB human-interface devices (HID, CDC, vendor-class), embedded sensor hubs with LIN bus, industrial control panels with multi-serial bridges, and low-power connected nodes that benefit from nanoWatt sleep modes and direct USB device connectivity.
When designing with this MCU, ensure the supply rail is held within 2.0-3.6 V for J-family parts (some peripheral specs extend higher), keep the 48 MHz decoupling tight to the VDD pins, and use a 12 MHz crystal with the internal PLL when USB is required for the ±0.25% clock-accuracy budget.
This page synthesizes distributor pricing, drop-in same-family alternatives from the PIC18 J-line, and practical design notes not aggregated on the Microchip product page.
Drop-in alternatives for PIC18F65J50-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 PIC18F65J50-I/PT (same form factor and footprint) — differing in Package, ADC, Operating Temperature, Timers, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F66J50-I/PT
✅ Drop-In✓ In Stock
$5.05 / Unit
View Datasheet →PIC18F65J11-I/PT
✅ Drop-In✓ In Stock
$4.35 / Unit
View Datasheet →PIC18F65J10-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.4 / Unit
View Datasheet →PIC18F65J50T-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.3 / Unit
View Datasheet →PIC18F66J50T-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.1 / Unit
View Datasheet →PIC18F63J90-I/PT
✅ Drop-In✓ In Stock
$3.75 / Unit
View Datasheet →PIC18F65J50-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18J (8-bit data, 16-bit instruction) |
| Maximum CPU Clock | 48 MHz (12 MIPS) |
| Program Memory (Flash) | 32 KB (16K x 16) |
| Data RAM | 3,936 bytes |
| Supply Voltage | 4.2 V to 5.5 V (datasheet primary spec, also operates 2.0-3.6 V per J-family) |
| I/O Pins | 54 |
| USB | Full-Speed USB 2.0 device, 12 Mbit/s, on-chip transceiver |
| Serial Interfaces | 2x EUSART (LIN-capable), 1x I2C (Master), 1x SPI (up to 10 Mbit/s) |
| ADC | 10-bit, up to 8 channels |
| Timers | 5x 8/16-bit timers |
| Package | 64-pin TQFP (PT), 10 x 10 mm, 1.0 mm height |
| Operating Temperature | -40C to +85C (Industrial, "I" suffix) |
| Mounting Type | Surface Mount (TQFP) |
| RoHS Status | Compliant (per DigiKey listing) |
PIC18F65J50-I/PT Pin Configuration
| Pin 1 | RC1/T1OSI — I/O port C bit 1 / Timer1 oscillator input |
| Pin 2 | RC2/P1A/CCP1 — I/O port C bit 2 / PWM output / CCP1 |
| Pin 3 | RC3 — I/O port C bit 3 |
| Pin 4 | RC4 — I/O port C bit 4 |
| Pin 5 | RC5 — I/O port C bit 5 |
| Pin 6 | RC6/TX1 — I/O port C bit 6 / EUSART1 async transmit |
| Pin 7 | RC7/RX1 — I/O port C bit 7 / EUSART1 async receive |
| Pin 8 | RE0/RD — I/O port E bit 0 / Parallel-port read |
| Pin 9 | RE1/WR — I/O port E bit 1 / Parallel-port write |
| Pin 10 | RE2/CS — I/O port E bit 2 / Parallel-port chip-select |
| Pin 11 | VDD — Positive supply |
| Pin 12 | VSS — Ground |
| Pin 13 | OSC1/CLKIN/RA7 — Crystal input / external clock / I/O |
| Pin 14 | OSC2/CLKOUT/RA6 — Crystal output / clock-out / I/O |
| Pin 15 | RC0 — I/O port C bit 0 |
| Pin 16 | RB0/INT0/FLT0 — I/O port B bit 0 / external interrupt |
| Pin 17 | RB1/INT1 — I/O port B bit 1 / external interrupt |
| Pin 18 | RB2/INT2 — I/O port B bit 2 / external interrupt |
| Pin 19 | RB3/INT3 — I/O port B bit 3 / external interrupt |
| Pin 20 | RB4 — I/O port B bit 4 |
| Pin 21 | RB5 — I/O port B bit 5 |
| Pin 22 | RB6/PGC — I/O port B bit 6 / ICSP clock |
| Pin 23 | RB7/PGD — I/O port B bit 7 / ICSP data |
| Pin 24 | VUSB — Internal USB transceiver supply |
| Pin 25 | D- — USB data minus |
| Pin 26 | D+ — USB data plus |
| Pin 27 | MCLR/RE3 — Master clear reset / I/O port E bit 3 |
| Pin 28 | RA0/AN0 — I/O port A bit 0 / analog input 0 |
| Pin 29 | RA1/AN1 — I/O port A bit 1 / analog input 1 |
| Pin 30 | RA2/AN2/VREF- — I/O port A bit 2 / analog input 2 / VREF- |
| Pin 31 | RA3/AN3/VREF+ — I/O port A bit 3 / analog input 3 / VREF+ |
| Pin 32 | RA4/T0CKI — I/O port A bit 4 / Timer0 clock input |
| Pin 33 | RA5/AN4/SS1 — I/O port A bit 5 / analog input 4 / SPI slave-select |
| Pin 34 | AVDD — Analog positive supply |
| Pin 35 | AVSS — Analog ground |
| Pin 36 | RD0/PSP0 — I/O port D bit 0 / parallel slave port |
| Pin 37 | RD1/PSP1 — I/O port D bit 1 / parallel slave port |
| Pin 38 | RD2/PSP2 — I/O port D bit 2 / parallel slave port |
| Pin 39 | RD3/PSP3 — I/O port D bit 3 / parallel slave port |
| Pin 40 | RD4/PSP4 — I/O port D bit 4 / parallel slave port |
| Pin 41 | RD5/PSP5 — I/O port D bit 5 / parallel slave port |
| Pin 42 | RD6/PSP6 — I/O port D bit 6 / parallel slave port |
| Pin 43 | RD7/PSP7 — I/O port D bit 7 / parallel slave port |
| Pin 44 | VSS — Ground |
| Pin 45 | VDD — Positive supply |
| Pin 46 | RF7/SS2 — I/O port F bit 7 / SPI2 slave-select |
| Pin 47 | RF6/AN11 — I/O port F bit 6 / analog input 11 |
| Pin 48 | RF5/AN10 — I/O port F bit 5 / analog input 10 |
| Pin 49 | RF4/AN9 — I/O port F bit 4 / analog input 9 |
| Pin 50 | RF3/AN8 — I/O port F bit 3 / analog input 8 |
| Pin 51 | RF2/AN7 — I/O port F bit 2 / analog input 7 |
| Pin 52 | RF1/AN6/C2OUT — I/O port F bit 1 / analog input 6 / comparator 2 output |
| Pin 53 | RF0/AN5 — I/O port F bit 0 / analog input 5 |
| Pin 54 | RG6 — I/O port G bit 6 |
| Pin 55 | RG7 — I/O port G bit 7 |
| Pin 56 | RG0 — I/O port G bit 0 |
| Pin 57 | RG1 — I/O port G bit 1 |
| Pin 58 | RG2 — I/O port G bit 2 |
| Pin 59 | RG3 — I/O port G bit 3 |
| Pin 60 | RG4 — I/O port G bit 4 |
| Pin 61 | RG5 — I/O port G bit 5 |
| Pin 62 | SCK1/SCL1 — SPI1 clock / I2C1 clock |
| Pin 63 | SDI1/SDA1 — SPI1 data in / I2C1 data |
| Pin 64 | SDO1 — SPI1 data out |
Typical Applications
PIC18F65J50-I/PT is suitable for 6 applications: USB Human-Interface Devices (HID), Industrial Sensor Hubs with LIN Bus, Embedded USB-to-Serial Bridges, Medical Data Acquisition Modules, Automotive LIN/CAN Gateway Nodes, Smart Home / IoT Connected Sensor Nodes.
USB Human-Interface Devices (HID)
The PIC18F65J50-I/PT is ideal for USB HID peripherals such as keyboards, mice, game controllers, and custom input devices. The on-chip Full-Speed USB 2.0 transceiver removes the need for an external PHY, and the 48 MHz PLL provides the ±0.25% clock accuracy required for USB enumeration. With 32 KB Flash and 3,936 bytes RAM, the MCU can host Microchip's free MLA HID stack while leaving room for vendor-specific report descriptors. Typical designs pair the MCU with a 12 MHz fundamental-mode crystal, 22 ohm series resistors on D+/D-, and standard bulk-cap decoupling on the VDD/VSS pairs; designers get a BOM-light, single-chip USB solution that draws sub-milliamps in suspend mode thanks to nanoWatt technology.
Recommended
Industrial Sensor Hubs with LIN Bus
The PIC18F65J50-I/PT's two LIN-capable EUSART modules make it a strong fit for industrial sensor hubs that aggregate analog/digital sensor data over a LIN backbone. Combined with the 10-bit ADC and CTMU for capacitive sensing, designers can build multi-sensor nodes that wake on a LIN command, sample, and reply. The 54 digital I/O lines allow direct multiplexing to multiple sensor channels. Compared to a discrete UART + MCU solution, this integrated device cuts BOM count and PCB area; the nanoWatt sleep currents extend battery life on maintenance-free industrial sensors that are expected to last years on a single cell.
Recommended
Embedded USB-to-Serial Bridges
The PIC18F65J50-I/PT is well-suited for USB-to-UART/SPI/I2C bridges that replace legacy RS-232 ports on legacy industrial equipment. The integrated USB 2.0 device port appears as a CDC virtual COM port or vendor-class device, while the EUSART and I2C peripherals expose the legacy buses to the host. The 48 MHz core and 3,936-byte RAM are sufficient to buffer CDC traffic and bridge to the downstream interface, all without an external PHY. Designers can leverage Microchip's MLA CDC stack to ship a Windows/macOS/Linux driverless bridge.
Recommended
Medical Data Acquisition Modules
The PIC18F65J50-I/PT's 10-bit ADC, ample I/O count, and USB device connectivity enable medical data-acquisition modules that stream sensor readings to a host PC for analysis. Combined with the CTMU for thermistor-style temperature measurement and the analog comparator for threshold detection, the MCU can host a complete patient-side measurement front end. The industrial -40C to +85C range covers most medical environments; for higher-reliability medical applications requiring FDA documentation, the same pinout is offered with extended characterization.
Recommended
Automotive LIN/CAN Gateway Nodes
The PIC18F65J50-I/PT's two LIN-capable EUSART modules and nanoWatt sleep modes make it suitable for automotive gateway nodes that aggregate LIN sub-network traffic and bridge to a USB diagnostic port for service technicians. The 54 I/O lines accommodate multiple LIN channels and status LEDs, and the industrial temperature grade handles under-dash automotive environments. Designers should verify the application against AEC-Q100 requirements; if AEC-Q100 is mandatory, look at the equivalent "-E" or "-Q" part numbers from Microchip's PIC18 automotive product line.
Recommended
Smart Home / IoT Connected Sensor Nodes
The PIC18F65J50-I/PT enables battery-friendly IoT nodes that report temperature, humidity, occupancy, or contact status via USB-tethered or LIN-bridged paths. The nanoWatt sleep modes drop the current draw to microamps when the bus is quiet, allowing multi-year battery life in intermittently-sampled applications. With 32 KB Flash, designers can host lightweight IP stacks or vendor-specific protocols without external memory. The wide operating temperature (-40C to +85C) supports indoor and sheltered outdoor installations, and the 64-TQFP provides ample I/O for multi-sensor fan-out.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F65J50-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F66J50-I/PT | PIC18F65J11-I/PT | PIC18F65J10-I/PT | PIC18F63J90-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-TQFP (PT) 10x10 mm | 64-TQFP (PT) 10x10 mm | 64-TQFP (PT) 10x10 mm | 64-TQFP (PT) 10x10 mm | 64-TQFP (PT) 10x10 mm |
| Max CPU Clock | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 40 MHz (10 MIPS) |
| Flash Memory | 32 KB (16K x 16) | 64 KB (+100%) | 32 KB (same) | 32 KB (same) | 8 KB (smaller) |
| USB 2.0 Device | Full-Speed, on-chip transceiver | Full-Speed, on-chip transceiver | None (no USB PHY) | None (no USB PHY) | None (no USB PHY) |
| EUSART (LIN-capable) | 2 | 2 | 2 | 2 | 2 |
| I/O Pins | 54 | 54 | 54 | 54 | 54 |
| Operating Temperature | -40C to +85C (I-grade) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Largest Flash in same 64-TQFP footprint at +100% memory (vs PIC18F66J50-I/PT)
- USB 2.0 Full-Speed on-chip transceiver (vs PIC18F65J11-I/PT)
- Sustained 48 MHz / 12 MIPS throughput (vs PIC18F63J90-I/PT)
Design Notes
The PIC18F65J50-I/PT uses an internal 3.3V regulator to power the core from the external 4.2-5.5V supply rail; bulk-decoupling on VDD/VSS pairs and AVdd/AVss pairs must be tight (0.1 uF ceramic + 10 uF bulk) to keep regulator noise off the ADC references. For USB, ensure VUSB has the recommended 220 nF decoupling and the D+/D- 1.5 k pull-up to VUSB is present only on D+ for Full-Speed enumeration.
J-family PIC18 devices operate primarily at 2.0-3.6V even though the datasheet primary spec lists 4.2-5.5V. The "4.2-5.5V" figure in some listings reflects a different bias. Always check the specific datasheet page for VDDMIN before migrating from F-series designs; under-voltage causes erratic Flash programming and unstable USB enumeration. Do not exceed the absolute-maximum VDD of 5.5V during ICSP programming.
Place the 12 MHz fundamental-mode crystal within 5 mm of OSC1/OSC2 with symmetrical traces over a continuous ground pour to meet the USB Full-Speed clock-accuracy budget. Keep the D+/D- pair matched-length with 90 ohm differential impedance, and route them far from switching traces like PWM outputs (RC2/P1A in this part). Use a ground-moat around the USB bus to reduce common-mode noise.
Estimated: at full 48 MHz CPU clock drawing 25 mA typ from 5V, dissipation is 0.125 W, well within the 64-TQFP's ~50 C/W theta_JA on a 2-layer board. However, USB bus-powered designs can deliver 500 mA to downstream loads, which raises local ambient inside the enclosure; derate ambient by 5-10 C for hot enclosures. No external heatsink is needed for this MCU's own dissipation.
Compliance Information
RoHS and lead-free per DigiKey listing. Standard PIC18F65J50-I/PT is industrial-grade (-40C to +85C); AEC-Q100 automotive variants are available under different ordering codes (-E or -Q suffix) per Microchip PIC18 automotive product line.
