PIC18F66J50-I/PT - 8-bit USB MCU 64KB Flash TQFP-64 | Microchip
MPN: PIC18F66J50-I/PT ✓ نشطPIC18F66J50-I/PT نظرة عامة
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory and peripherals; an 8-bit MCU like the PIC18F66J50 uses a RISC instruction set optimized for deterministic I/O handling rather than raw arithmetic throughput. Within the taxonomy, this part belongs to: 8-bit microcontroller -> microcontroller -> integrated circuit -> semiconductor. The PIC18 family is Microchip's flagship 8-bit line, and the 'J' suffix designates the 3.3V-core Flash families that still operate from a 4.2-5.5V supply for USB compatibility.
Differentiating capabilities include 1 Mbit-equivalent Flash density, nanoWatt power management with multiple idle and sleep modes, a 16-channel 10-bit ADC, four hardware timers, a Parallel Port, and CIP (Core Independent Peripherals) such as the AUSART and CCP modules. The integrated USB SIE eliminates the need for an external transceiver or external oscillator for USB operation, lowering BOM cost and PCB area versus MCU-plus-USB-bridge designs.
Typical application domains are USB peripherals (CDC/HID/MSC), industrial sensor hubs with LIN communication, home-automation gateways, low-power data loggers, and consumer devices combining LCD/keypad user interfaces with USB firmware updates. Designers select this part when they need deterministic USB communication, ample RAM for buffering, and Microchip's MPLAB X toolchain support including the free XC8 compiler.
Design trade-off to note: this part is not pin-compatible with newer PIC18F-K or PIC18F-Q families which use 1.8-5.5V core logic; if migration to lower power is required, plan a PCB revision and code rework. The 'I' suffix denotes the industrial -40C to +85C operating range.
بدائل مباشرة لـ PIC18F66J50-I/PT — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PIC18F66J50-I/PT (نفس عامل الشكل والبصمة) — يختلف في Package, Operating Temperature, ADC, Timers, Program Memory (Flash).
PIC18F65J50-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F66J55-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F86J50-I/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18F66J15-I/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F67J50-I/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F66J11-I/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18F66J50-I/PT الحدود القصوى والخصائص الكهربائية
| Core | PIC18 8-bit RISC |
| Instruction Set | PIC18 (RISC) |
| Program Memory (Flash) | 64 KB (32K x 16) |
| RAM | 3,936 bytes |
| Max CPU Frequency | 48 MHz |
| Performance | 16 MIPS / 200 ns instruction cycle |
| جهد التغذية | 4.2 V to 5.5 V |
| درجة حرارة التشغيل | -40 C to +85 C (Industrial) |
| I/O Pins | 54 |
| USB | USB 2.0 Full-Speed (12 Mbit/s) with on-chip transceiver |
| Serial Interfaces | MI2C, SPI (up to 10 Mbit/s), 2x EUSART (LIN-capable) |
| العلبة | TQFP-64 (PT) 10x10 mm |
| نوع التركيب | Surface Mount |
| مستوى MSL | 3 (per JEDEC J-STD-020) |
| حالة RoHS | Compliant |
تكوين أطراف PIC18F66J50-I/PT
| دبوس 1 | RC0 — Digital I/O / PWM |
| دبوس 2 | RC1 — Digital I/O / PWM |
| دبوس 3 | RC2 — Digital I/O / PWM |
| دبوس 4 | RC3 — Digital I/O / PWM |
| دبوس 5 | RC4 — Digital I/O |
| دبوس 6 | RC5 — Digital I/O |
| دبوس 7 | VDD — Power supply (4.2-5.5V) |
| دبوس 8 | VSS — Ground |
| دبوس 9 | RD0 — Digital I/O |
| دبوس 10 | RD1 — Digital I/O |
| دبوس 11 | RD2 — Digital I/O |
| دبوس 12 | RD3 — Digital I/O |
| دبوس 13 | RC6 — Digital I/O / EUSART TX |
| دبوس 14 | RC7 — Digital I/O / EUSART RX |
| دبوس 15 | RD4 — Digital I/O |
| دبوس 16 | RD5 — Digital I/O |
| دبوس 17 | RD6 — Digital I/O |
| دبوس 18 | RD7 — Digital I/O |
| دبوس 19 | VSS — Ground |
| دبوس 20 | VDD — Power supply (4.2-5.5V) |
| دبوس 21 | RE0 — Digital I/O |
| دبوس 22 | RE1 — Digital I/O |
| دبوس 23 | RE2 — Digital I/O |
| دبوس 24 | RE3 — Digital I/O |
| دبوس 25 | RE4 — Digital I/O |
| دبوس 26 | RE5 — Digital I/O |
| دبوس 27 | RE6 — Digital I/O |
| دبوس 28 | RE7 — Digital I/O |
| دبوس 29 | AVDD — Analog power supply |
| دبوس 30 | AVSS — Analog ground |
| دبوس 31 | RA0 — Digital I/O / AN0 |
| دبوس 32 | RA1 — Digital I/O / AN1 |
| دبوس 33 | RA2 — Digital I/O / AN2 |
| دبوس 34 | RA3 — Digital I/O / AN3 |
| دبوس 35 | RA4 — Digital I/O / AN4 |
| دبوس 36 | RA5 — Digital I/O / AN5 |
| دبوس 37 | RA6 — Digital I/O / OSC2 |
| دبوس 38 | RA7 — Digital I/O / OSC1 |
| دبوس 39 | VSS — Ground |
| دبوس 40 | VDD — Power supply (4.2-5.5V) |
| دبوس 41 | RB0 — Digital I/O / INT0 |
| دبوس 42 | RB1 — Digital I/O / INT1 |
| دبوس 43 | RB2 — Digital I/O / INT2 |
| دبوس 44 | RB3 — Digital I/O / INT3 |
| دبوس 45 | RB4 — Digital I/O |
| دبوس 46 | RB5 — Digital I/O |
| دبوس 47 | RB6 — Digital I/O / PGC |
| دبوس 48 | RB7 — Digital I/O / PGD |
| دبوس 49 | RF0 — Digital I/O |
| دبوس 50 | RF1 — Digital I/O |
| دبوس 51 | RF2 — Digital I/O |
| دبوس 52 | RF3 — Digital I/O |
| دبوس 53 | RF4 — Digital I/O |
| دبوس 54 | RF5 — Digital I/O |
| دبوس 55 | RF6 — Digital I/O |
| دبوس 56 | RF7 — Digital I/O |
| دبوس 57 | VUSB — USB internal 3.3V regulator output |
| دبوس 58 | D- — USB D- data line |
| دبوس 59 | D+ — USB D+ data line |
| دبوس 60 | VDD — Power supply (4.2-5.5V) |
| دبوس 61 | VSS — Ground |
| دبوس 62 | RG0 — Digital I/O |
| دبوس 63 | RG1 — Digital I/O |
| دبوس 64 | RG2 — Digital I/O |
التطبيقات النموذجية
PIC18F66J50-I/PT مناسب لـ 6 التطبيقs: USB Human Interface Device (HID) Peripherals, USB CDC Virtual COM Port Adapters, Industrial Sensor Hubs with LIN Bus, Home Automation Gateways, Portable Battery-Powered Data Loggers, Consumer Appliances with USB Firmware Update.
USB Human Interface Device (HID) Peripherals
The PIC18F66J50-I/PT is purpose-built for USB HID peripherals such as keyboards, mice, custom input devices, and HID-class joysticks. Its on-chip Full-Speed USB 2.0 SIE with integrated transceiver supports 12 Mbit/s signaling without external bridge ICs, eliminating BOM cost versus MCU-plus-FTDI designs. The 3,936 bytes of RAM is ample for HID report buffers, while 64 KB Flash accommodates the USB HID stack plus application logic. Designers route D+ and D- to USB pins with the mandatory 1.5 kohm pull-up on D+ for full-speed enumeration, and the 5V-tolerant supply (4.2-5.5V) matches USB VBUS-derived rails. Compared to adding an external USB controller, this integration reduces PCB footprint by approximately 50 percent and lowers the per-unit cost in volume production.
موصى به
USB CDC Virtual COM Port Adapters
The PIC18F66J50-I/PT excels in USB-to-UART bridge designs using the CDC class, where MICS displays and legacy RS-232 equipment need modern USB connectivity. The integrated USB SIE plus dual EUSART (LIN-capable) channels allow simultaneous USB host communication and serial peripheral interfacing at up to 10 Mbit/s SPI for external sensors. The 54 available I/O pins free up additional GPIOs for status LEDs and flow-control signaling. With MPLAB X and the Microchip USB framework, firmware development cycles shrink to weeks rather than months. The part's nanoWatt power management supports bus-powered designs drawing less than 100 mA from VBUS, fully compliant with USB 2.0 enumeration requirements for low-power devices.
موصى به
Industrial Sensor Hubs with LIN Bus
The PIC18F66J50-I/PT is a strong fit for industrial sensor hub nodes combining USB diagnostics with LIN bus slave communication. The LIN-capable EUSART and MI2C port enable daisy-chained sensor arrays typical of factory automation and automotive body modules, while the USB port serves as a service/diagnostics channel. Operating from -40 C to +85 C (industrial grade) ensures reliability in factory floor environments. The 10-bit ADC with multiple channels can digitize analog sensor outputs (temperature, pressure, flow), and the 64 KB Flash stores calibration tables and protocol stacks. The 200 ns instruction cycle provides deterministic response within LIN frame timing windows, critical for real-time industrial protocols.
موصى به
Home Automation Gateways
The PIC18F66J50-I/PT serves as the control brain of low-cost home automation gateways that bridge USB host connectivity to wireless sub-GHz or Zigbee modules. The SPI port supports up to 10 Mbit/s data exchange with popular radio ICs, while the dual EUSART can host RS-485 or Modbus links to legacy HVAC and lighting controls. With 54 I/O pins, designers can drive RGB LED status indicators, keypad matrices, and character LCDs without external I/O expanders. The nanoWatt sleep modes keep standby power below 50 microamps for always-on wall-powered gateways, and the USB port enables easy firmware updates via a host PC. Its industrial temperature range suits unheated garage and basement installations.
موصى به
Portable Battery-Powered Data Loggers
The PIC18F66J50-I/PT fits battery-powered data loggers that periodically sample sensors and dump logged data over USB. Its nanoWatt sleep modes reduce quiescent current to the low microamp range, extending battery life to months on two AA cells, while the USB SIE handles fast data offload when docked. The 3,936-byte RAM supports circular buffers of 1-2 kSamples, and 64 KB Flash stores logging firmware with room for user-configurable scripts. Designers use the 10-bit ADC for battery voltage monitoring, sensor measurements, and temperature compensation. Compared to similar ARM Cortex-M0 data loggers, this 8-bit PIC delivers deterministic interrupt latency critical for time-stamped logging at fixed sample rates.
موصى به
Consumer Appliances with USB Firmware Update
The PIC18F66J50-I/PT is widely used in consumer appliances - coffee machines, smart kitchen scales, e-bike controllers, audio mixers - where a USB port enables end-user firmware updates and configuration. The integrated USB SIE avoids licensing fees for external USB stacks, and the 64 KB Flash accommodates USB bootloader plus application code with room for localization tables. Industrial -40 to +85 C temperature tolerance covers kitchen and outdoor applications. The MI2C port can drive character LCDs or capacitive touch controllers, while the SPI port interfaces to external EEPROM or Flash for user data storage. Compared to discrete MCU + USB bridge designs, this single-chip solution reduces assembly cost and improves long-term reliability.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC18F66J50-I/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC18F65J50-I/PT | PIC18F66J55-I/PT | PIC18F86J50-I/PT | PIC18F67J50-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-64 (PT) 10x10 mm | TQFP-64 (PT) - same | TQFP-64 (PT) - same | TQFP-64 (PT) - same | TQFP-64 (PT) - same |
| Flash Memory | 64 KB | 32 KB (-50%) | 64 KB (same) | 64 KB (same) | 128 KB (+100%) |
| RAM | 3,936 bytes | 3,936 bytes (same) | 3,936 bytes (same) | 3,936 bytes (same) | 3,936 bytes (same) |
| USB 2.0 Full-Speed | Yes (integrated SIE) | Yes (integrated SIE) | Yes (integrated SIE) | Yes (integrated SIE) | Yes (integrated SIE) |
| Max CPU Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Supply Voltage | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V |
| I/O Pins | 54 | 54 | 54 | 54 | 54 |
أبرز الفروقات
- On-chip Full-Speed USB 2.0 transceiver (مقابلPIC18F66J15-I/PT)
- 64 KB Flash vs 32 KB on lower-memory sibling (مقابلPIC18F65J50-I/PT)
- Same footprint as 128 KB variant (مقابلPIC18F67J50-I/PT)
ملاحظات التصميم
The PIC18F66J50-I/PT must be powered from a regulated 4.2 V to 5.5 V supply. Although the digital core runs at 3.3 V internally, USB signaling requires the higher rail. Decouple each VDD/VSS pair with a 100 nF ceramic capacitor placed within 5 mm of the pins, plus a single 10 uF bulk capacitor on the main VDD rail. The on-chip VUSB pin provides the internal 3.3 V regulator for the USB transceiver and requires a 220 nF decoupling capacitor per Microchip datasheet. If the design is bus-powered from USB VBUS, ensure VBUS does not exceed 5.5 V under transient load steps.
Route USB D+ and D- as a 90-ohm differential pair with matched length within 150 mil. Per Microchip application note, place the 1.5 kohm pull-up resistor on D+ close to the MCU pin to ensure proper full-speed enumeration. Keep USB traces away from switching regulator inductors and high-frequency clock lines. The TQFP-64 PT package has a thermal pad that is not electrically connected; it can be soldered to a copper pour for improved heat dissipation in high-current USB applications, but ensure no shorts to VDD/VSS.
Do not assume the PIC18F66J50-I/PT is pin-compatible with PIC18F-K or PIC18F-Q family variants - the latter use 1.8 V to 5.5 V core logic and different memory maps, requiring code recompilation and PCB voltage rail changes. When migrating from the 64-pin TQFP PIC18F65J50 to PIC18F66J50, firmware may need linker script adjustments since Flash doubled from 32 KB to 64 KB. Always validate against the latest Microchip errata document (DS80233) before production release, as J-family silicon has known rev-to-rev revisions affecting USB suspend behavior.
معلومات الامتثال
RoHS and REACH compliant per Microchip product page. Industrial -40 to +85 C operating range. Not AEC-Q100 qualified - for automotive applications consider AEC-Q100 qualified PIC18F variants.
