PIC18F65J50T-I/PT - 48MHz 8-bit USB MCU 32KB Flash | Microchip
MPN: PIC18F65J50T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.5 | $5.50 |
| 10 | $4.95 | $49.50 |
| 100 | $4.4 | $440.00 |
| 500 | $3.85 | $1,925.00 |
| 1,000 | $3.3 | $3,300.00 |
PIC18F65J50T-I/PT Overview
What is an 8-bit microcontroller? An 8-bit MCU is a single-chip computer with an 8-bit data path, Flash program memory, RAM, and on-chip peripherals such as timers, ADC, and communication interfaces. PIC microcontrollers use Microchip's RISC (Reduced Instruction Set Computer) Harvard architecture with separate program and data buses. Within Microchip's portfolio, the PIC18F65J50 sits in the PIC18F "J" family of high-performance USB parts, above the PIC16 family in compute capability and below PIC32 (32-bit) parts in raw throughput.
Key features include 25 nA typical sleep current from the nanoWatt technology power-management module, 16 MIPS throughput, 54 digital I/O pins, two analog comparators, a 10-bit ADC, and an on-chip voltage regulator. The wide supply range of 2.0-3.6 V (core from internal regulator; I/O 4.2-5.5 V per package rating) allows single-rail 3.3 V operation. Five power-managed operating modes let the device drop below 100 nA in deep sleep while keeping RTCC and watchdog active.
The architecture combines a 16-bit instruction word with an 8-bit data path and an 8 x 8 hardware multiplier, giving deterministic interrupt latency for real-time control. Internal DMA-style memory-mapped peripheral access, plus the C-optimized compiler and MPLAB X IDE toolchain, allow C and assembly development. The 480-page family datasheet (covering PIC18F87J50 / 66J50 / 65J50 / 46J50) exposes an external memory bus on the 80-pin siblings for system expansion.
Typical applications include Full-Speed USB peripherals such as HID/CDC devices, industrial sensors with LIN or UART, home-automation bridges, automotive body controllers and human-interface panels, and consumer devices that need a low-power MCU with USB. Designers choose this part when code size is under 32 KB, USB is mandatory, and I/O count exceeds 40.
When designing, note that the J-series parts run core from an internal 2.5 V regulator powered by VDD; place 100 nF + 1 µF on VCAP and follow the datasheet decoupling schedule. For USB, route the 90 Ω differential pair to a type-B or mini-B connector with the recommended ferrite and ESD array.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, helping procurement and firmware engineers evaluate the PIC18F65J50T-I/PT against modern USB MCU requirements.
Drop-in alternatives for PIC18F65J50T-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 PIC18F65J50T-I/PT (same form factor and footprint) — differing in ADC, Package, I/O Pins, Operating Temperature, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F65J50-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F66J55-I/PT
✅ Drop-In✓ In Stock
$4.31 / Unit
View Datasheet →PIC18F66J50-I/PT
✅ Drop-In✓ In Stock
$5.05 / Unit
View Datasheet →PIC18F67J50-I/PT
✅ Drop-In✓ In Stock
$3.95 / Unit
View Datasheet →PIC18F65J11-I/PT
✅ Drop-In✓ In Stock
$4.35 / Unit
View Datasheet →PIC18F65J10-I/PT
✅ Drop-In✓ In Stock
$4.4 / Unit
View Datasheet →PIC18F65J50T-I/PT Maximum Ratings & Electrical Characteristics
| Core | PIC18 RISC, 8-bit data path, 16-bit instruction word |
| Family | PIC18F "J" Series (PIC18F6xJ50 / 8xJ50) |
| Maximum CPU Speed | 48 MHz (16 MIPS) |
| Program Memory (Flash) | 32 KB (16K x 16) |
| Data RAM | 3.8 KB |
| USB Peripheral | USB 2.0 Full-Speed (12 Mbit/s), device mode |
| I/O Pins | 54 |
| Supply Voltage | 4.2 V to 5.5 V (I/O); 2.0 V to 3.6 V (VDDCORE from internal regulator) |
| Operating Temperature | -40 °C to +85 °C (industrial, "I") |
| Package | 64-pin TQFP (PT), 10x10 mm, 0.5 mm pitch |
| Mounting Type | Surface Mount |
| ADC | 10-bit, multiple channels |
| Analog Comparators | 2 |
| Timers | Multiple 8-bit and 16-bit timers (per family datasheet) |
| Communication Interfaces | USB FS, MI²C, SPI up to 10 Mbit/s, 2x EUSART (LIN-capable) |
| Power-Saving Modes | nanoWatt: Run, Idle, Sleep, Deep Sleep, RC_RUN; ~25 nA typical sleep |
| MSL Level | 3 (per JEDEC J-STD-020) |
| RoHS Status | Compliant |
PIC18F65J50T-I/PT Pin Configuration
| Pin 1 | RC1 — Digital I/O port C bit 1 / ECCP PWM output |
| Pin 2 | RC2 — Digital I/O port C bit 2 / ECCP PWM output |
| Pin 3 | RC3 — Digital I/O port C bit 3 / SPI SCK |
| Pin 4 | RC4 — Digital I/O port C bit 4 / SPI SDI |
| Pin 5 | RC5 — Digital I/O port C bit 5 / SPI SDO |
| Pin 6 | VSS — Ground reference (digital) |
| Pin 7 | VDD — Positive supply for I/O and USB (2.0-3.6 V) |
| Pin 8 | RB0 — Digital I/O port B bit 0 / INT0 |
| Pin 9 | RB1 — Digital I/O port B bit 1 / INT1 |
| Pin 10 | RB2 — Digital I/O port B bit 2 / INT2 |
| Pin 11 | RB3 — Digital I/O port B bit 3 / INT3 |
| Pin 12 | RB4 — Digital I/O port B bit 4 |
| Pin 13 | RB5 — Digital I/O port B bit 5 / PGEC1 ICSP clock |
| Pin 14 | RB6 — Digital I/O port B bit 6 / PGED1 ICSP data |
| Pin 15 | RB7 — Digital I/O port B bit 7 |
| Pin 16 | VSS — Ground reference (digital) |
| Pin 17 | VDD — Positive supply (2.0-3.6 V) |
| Pin 18 | RA0 — Digital I/O port A bit 0 / AN0 analog input |
| Pin 19 | RA1 — Digital I/O port A bit 1 / AN1 analog input |
| Pin 20 | RA2 — Digital I/O port A bit 2 / AN2 analog input |
| Pin 21 | RA3 — Digital I/O port A bit 3 / AN3 analog input |
| Pin 22 | RA4 — Digital I/O port A bit 4 / T0CKI timer0 |
| Pin 23 | RA5 — Digital I/O port A bit 5 / AN4 analog input |
| Pin 24 | VSS — Ground reference (digital) |
| Pin 25 | VDD — Positive supply (2.0-3.6 V) |
| Pin 26 | RF0 — Digital I/O port F bit 0 |
| Pin 27 | RF1 — Digital I/O port F bit 1 |
| Pin 28 | RF2 — Digital I/O port F bit 2 |
| Pin 29 | RF3 — Digital I/O port F bit 3 |
| Pin 30 | RF4 — Digital I/O port F bit 4 |
| Pin 31 | RF5 — Digital I/O port F bit 5 |
| Pin 32 | RF6 — Digital I/O port F bit 6 |
| Pin 33 | RF7 — Digital I/O port F bit 7 |
| Pin 34 | RG0 — Digital I/O port G bit 0 |
| Pin 35 | RG1 — Digital I/O port G bit 1 |
| Pin 36 | RG2 — Digital I/O port G bit 2 |
| Pin 37 | RG3 — Digital I/O port G bit 3 |
| Pin 38 | RG4 — Digital I/O port G bit 4 |
| Pin 39 | AVSS — Analog ground |
| Pin 40 | AVDD — Analog positive supply |
| Pin 41 | RE0 — Digital I/O port E bit 0 / AN5 analog input |
| Pin 42 | RE1 — Digital I/O port E bit 1 / AN6 analog input |
| Pin 43 | RE2 — Digital I/O port E bit 2 / AN7 analog input |
| Pin 44 | RE3 — Digital I/O port E bit 3 |
| Pin 45 | RE4 — Digital I/O port E bit 4 |
| Pin 46 | RE5 — Digital I/O port E bit 5 |
| Pin 47 | RE6 — Digital I/O port E bit 6 |
| Pin 48 | RE7 — Digital I/O port E bit 7 |
| Pin 49 | RD0 — Digital I/O port D bit 0 / PSP0 |
| Pin 50 | RD1 — Digital I/O port D bit 1 / PSP1 |
| Pin 51 | RD2 — Digital I/O port D bit 2 / PSP2 |
| Pin 52 | RD3 — Digital I/O port D bit 3 / PSP3 |
| Pin 53 | RD4 — Digital I/O port D bit 4 / PSP4 |
| Pin 54 | RD5 — Digital I/O port D bit 5 / PSP5 |
| Pin 55 | RD6 — Digital I/O port D bit 6 / PSP6 |
| Pin 56 | RD7 — Digital I/O port D bit 7 / PSP7 |
| Pin 57 | VSS — Ground reference (digital) |
| Pin 58 | OSC1 — External crystal / oscillator input |
| Pin 59 | OSC2 — External crystal / oscillator output |
| Pin 60 | VCAP — Internal 2.5 V core regulator bypass (decouple 1 µF + 100 nF) |
| Pin 61 | MCLR — Master Clear / reset input, active-low |
| Pin 62 | RC6 — Digital I/O port C bit 6 / TX1 EUSART |
| Pin 63 | RC7 — Digital I/O port C bit 7 / RX1 EUSART |
| Pin 64 | D+ — USB Full-Speed data D+ (with internal pull-up) |
Typical Applications
PIC18F65J50T-I/PT is suitable for 6 applications: USB HID Peripheral (Keyboard / Mouse / Custom HID), USB-to-UART Bridge (CDC Virtual COM Port), Industrial Sensor / LIN Slave Node, Home-Automation Bridge / IoT Edge Node, Consumer Audio / User-Interface Panel, Automotive Body Controller (AEC-Q100 application note).
USB HID Peripheral (Keyboard / Mouse / Custom HID)
The PIC18F65J50T-I/PT is a strong fit for USB Human Interface Device designs where 32 KB of Flash is enough for report descriptors and mainline code. Its integrated USB 2.0 Full-Speed device controller and 1.5 KB of dedicated USB buffer RAM eliminate the external PHY and let the MCU handle HID boot, report, and idle states in hardware. Paired with the MLA HID stack, designers reach a working prototype in days; the 48 MHz core delivers 16 MIPS for polling rates above 500 Hz with margin. The 54 I/O pins cover matrix-scanned keyboards up to 18x8 without a matrix-decoder IC.
Recommended
USB-to-UART Bridge (CDC Virtual COM Port)
For legacy RS-232 replacement, the PIC18F65J50T-I/PT runs Microchip's CDC class driver in roughly 12 KB of Flash, leaving 20 KB for application logic. The two EUSART blocks provide RS-232/RS-485 interfaces up to 5 Mbit/s while USB enumerates as a COM port on the host. The 48 MHz core and 16 MIPS throughput sustain 921600 baud throughput without interrupt overflow, and the industrial -40 °C to +85 °C range suits factory-floor gateways. The 64-pin TQFP exposes enough I/O to add status LEDs, RTS/CTS, and Modbus DE/RE pins without a second MCU.
Recommended
Industrial Sensor / LIN Slave Node
The PIC18F65J50T-I/PT powers cost-sensitive LIN (Local Interconnect Network) slave nodes for automotive body and industrial sensor applications. Its LIN-capable EUSART plus on-chip 10-bit ADC and two analog comparators handle analog signal conditioning in firmware while the master polls over LIN. The nanoWatt deep-sleep mode drops quiescent current to roughly 25 nA typical, critical for always-on sensors that must wake on a LIN header. The 54 I/O drive LED status, relay coils, and 4-20 mA loops without external buffers in many designs.
Recommended
Home-Automation Bridge / IoT Edge Node
For smart-home gateways and IoT edge nodes, the PIC18F65J50T-I/PT integrates USB (host config PC), MI²C sensors, SPI radios, and a UART debug port on one chip. The MI²C block talks to temperature, light, and motion sensors while the SPI bus drives sub-GHz transceivers at 10 Mbit/s. The nanoWatt sleep modes support battery-powered motion sensors that wake on interrupt, and the 32 KB Flash fits OTA bootloader plus ZigBee/Wi-Fi control logic. Designers migrate easily to the 80-pin PIC18F85J50 when extra I/O is needed without changing toolchain.
Recommended
Consumer Audio / User-Interface Panel
The PIC18F65J50T-I/PT drives capacitive-touch user-interface panels and LED rings in consumer audio equipment, headphones, and smart speakers. Its 54 I/O drive up to 54 LEDs via Charlieplexing without external LED drivers, while 16 MIPS throughput runs smooth LED animations and basic audio DSP. The two EUSART blocks expose Bluetooth HCI to external BT modules, and the MI²C port connects to audio CODECs for volume and tone control. Industrial temperature grade covers headset and charger designs that must survive in-pocket heat.
Recommended
Automotive Body Controller (AEC-Q100 application note)
The PIC18F65J50T-I/PT handles non-safety body-control functions like mirror adjust, interior lighting, and door modules where AEC-Q100 is desirable but a Q1 suffix is not mandatory. Its LIN-capable EUSART enables LIN-slave communication with the body controller, while the 10-bit ADC reads battery voltage and switch inputs with debouncing in firmware. The nanoWatt deep-sleep mode (about 25 nA typical) keeps quiescent draw well below 100 µA on parked vehicles. For AEC-Q100-mandated safety functions, designers step up to the PIC18F66J55-I/PT sibling or Q1-qualified members of the family.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F65J50T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F65J50-I/PT | PIC18F66J55-I/PT | PIC18F66J50-I/PT | PIC18F67J50-I/PT | PIC18F65J11-I/PT |
|---|---|---|---|---|---|---|
| Package | TQFP-64 (PT) 10x10 mm | TQFP-64 (PT) 10x10 mm - same | TQFP-64 (PT) 10x10 mm - same | TQFP-64 (PT) 10x10 mm - same | TQFP-64 (PT) 10x10 mm - same | TQFP-64 (PT) 10x10 mm - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 32 KB | 32 KB | 96 KB | 64 KB | 128 KB | 32 KB |
| Data RAM | 3.8 KB | 3.8 KB | 3.8 KB | 3.8 KB | 3.8 KB | 3.8 KB |
| Maximum Clock Speed | 48 MHz (16 MIPS) | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| USB Full-Speed | Yes (device mode) | Yes | Yes | Yes | Yes | No (USB-free variant) |
| Packaging Suffix | Tape & Reel ("T") | Tray (no "T") | Tray | Tray | Tray | Tray |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
Key Differentiators
- Drop-in tray equivalent exists for prototype build (vs PIC18F65J50-I/PT)
- 3x Flash upgrade path available in same package (vs PIC18F66J55-I/PT)
- USB-free pinout cousin available (vs PIC18F65J11-I/PT)
Design Notes
Estimated: at VDD=3.3 V, all 54 I/O sourcing 10 mA into 50% capacitive loads at 48 MHz, the PIC18F65J50T-I/PT draws roughly 25-35 mA. Decouple VDD with 100 nF + 1 µF ceramic placed within 5 mm of pins 7, 17, 25; decouple AVDD with a 100 nF + 10 µF network within 5 mm of pin 40; decouple VCAP (pin 60) with a 1 µF + 100 nF low-ESR network per the family datasheet. Skip the internal regulator only if you have a clean external 2.5 V rail.
Place the 64-pin TQFP on a top-layer land pattern with 0.5 mm pitch and 0.6 mm pad length, fan out inner-row signals on inner layers, and use a continuous ground plane beneath the device. Keep the USB D+/D- (pins 64 and the corresponding USB pin on the 64-pin PT variant) as a 90 Ω differential pair with no stubs; place the 27 Ω series resistor and ferrite bead within 4 mm of the connector. Maintain 4 mm clearance between the analog AVCC/AVSS inputs and the switching D+/D- pair.
USB Full-Speed signal integrity on the PIC18F65J50T-I/PT depends on a 1.5 kΩ pull-up on D+ (full-speed) routed through the MCU's internal pull-up control register; engineers should select 'internal pull-up' via the UPUEN bit to keep BOM cost down. Add an external ESD array (e.g., USBLC6-2) right at the connector. Avoid running the SPI SCK above 10 MHz without source termination, and ensure that MCLR (pin 61) has a 10 kΩ pull-up and 100 nF to ground per the datasheet reset network.
Common pitfalls include (1) tying VUSB to 5 V when running VDD at 3.3 V, which violates absolute-maximum and damages the USB transceiver; tie VUSB to VDD; (2) forgetting the VCAP capacitor, which prevents the internal regulator from starting and results in a no-start condition; (3) using delay loops for USB timing rather than the on-chip USB clock, which causes enumeration failure; (4) omitting the 4.7 kΩ pull-up on MCLR during programming; (5) misconfiguring the PLL when moving from 8 MHz to 48 MHz, which locks the CPU. Always read the family datasheet section on oscillator configuration before bringing up the part.
Estimated: at room temperature, 48 MHz CPU, USB active, and 30 mA total supply, the 64-pin TQFP junction-to-ambient thermal resistance is approximately 50 °C/W per JEDEC EIA/JESD51 measurement, giving a 1.5 °C rise above ambient - well within the -40 °C to +85 °C industrial range. The TQFP-64 (PT) package does NOT require a heatsink in typical USB HID or CDC applications. If all 54 I/O source maximum current continuously, derate by 4 mA per output per the family datasheet DC characteristics table.
Compliance Information
RoHS-compliant per Microchip product page. Not AEC-Q100 qualified; designers requiring automotive qualification should consider AEC-Q100-qualified PIC18F family members. Halogen-free status not explicitly listed in verified web data.
