PIC18LF8680-I/PT - 8-Bit 40MHz PIC18 MCU 64KB Flash TQFP-80 | Microchip
MPN: PIC18LF8680-I/PT ✓ نشطPIC18LF8680-I/PT نظرة عامة
The PIC18 architecture is an enhanced 8-bit Harvard RISC core with 16-bit wide instructions and a 16-bit data path, optimized for deterministic interrupt response and C-friendly compilation. The "LF" prefix denotes the low-voltage (2.0V to 5.5V) F-variant process, allowing battery-powered or 3.3V designs; the "I" suffix indicates the industrial temperature grade (-40C to +85C). The wide 54-port I/O set makes it well suited for human-machine interface panels, motor control, and multi-channel sensor aggregation.
Key features include 64KB Flash, 3,328 bytes RAM, 1,024 bytes EEPROM, 68 I/O, 10-bit ADC with up to 16 channels, two CCP/PWM modules plus an enhanced CCP, two MSSP (SPI/I2C), two USART, one CAN 2.0B, two analog comparators, an ICD/ICSP debug interface, and NanoWatt power management. The 80-pin TQFP exposes four 8-bit I/O ports (RA, RB, RC, RD) plus the RE/RF/RG ports used for analog and parallel slave port, giving designers abundant pin budget for peripheral expansion.
Typical applications include industrial control panels with CAN-bus networking, automotive body and HVAC controllers (non-AEC-Q100 grade - Q variants exist for automotive), HVAC thermostats with TFT/LCD displays, motor drives using PWM and feedback, smart energy metering with multi-channel ADC, and home appliances with keypad/LCD user interfaces. The CAN 2.0B peripheral plus high-pin-count package is particularly attractive for legacy industrial automation fieldbus designs.
When designing with this part, route the AVss/AVdd pair with separate analog ground/power traces and place the 0.1uF + 10uF decoupling capacitor pair as close to the Vdd pins as possible. Configure unused I/O as outputs low to minimize current draw. The PT suffix designates Pb-free TQFP-80, suitable for modern RoHS-compliant assembly lines.
بدائل مباشرة لـ PIC18LF8680-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 PIC18LF8680-I/PT (نفس عامل الشكل والبصمة) — يختلف في Package, Operating Temperature, Core Architecture, RoHS Status, I/O Pins.
PIC18F8680-I/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18F8722-I/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F8621-I/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LF8722-I/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F8585-I/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LF8527-I/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18LF8680-I/PT الحدود القصوى والخصائص الكهربائية
| Core | PIC18 8-bit Harvard RISC |
| Architecture | 8-bit data path, 16-bit instructions |
| Program Memory | 64 KB Flash (32K x 16) |
| RAM | 3,328 bytes |
| EEPROM | 1,024 bytes |
| Maximum Clock Speed | 40 MHz |
| جهد التغذية | 2.0 V to 5.5 V (LF series) |
| I/O Pins | 68 |
| ADC | 10-bit, up to 16 channels |
| Comparators | 2 analog comparators |
| Capture/Compare/PWM | 2 CCP + 1 ECCP |
| Communication | 2x USART, 2x MSSP (SPI/I2C), 1x CAN 2.0B |
| العلبة | TQFP-80 (PT) 12x12 mm |
| درجة حرارة التشغيل | -40 C to +85 C (industrial, I suffix) |
| نوع التركيب | Surface Mount |
| حالة RoHS | Compliant (PT suffix = Pb-free) |
| Debug Interface | ICD / ICSP (in-circuit serial programming) |
| Power-Saving Modes | NanoWatt technology (Sleep, Idle, RC_RUN) |
تكوين أطراف PIC18LF8680-I/PT
| دبوس 1 | MCLR — Reset input (active-low, internal pull-up enabled by configuration) |
| دبوس 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| دبوس 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| دبوس 4 | RA2/AN2/Vref- — PORTA bit 2 / Analog input 2 / ADC Vref- |
| دبوس 5 | RA3/AN3/Vref+ — PORTA bit 3 / Analog input 3 / ADC Vref+ |
| دبوس 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| دبوس 7 | RA5/AN4 — PORTA bit 5 / Analog input 4 |
| دبوس 8 | RA6 — PORTA bit 6 |
| دبوس 9 | OSC1/RA7 — Crystal input / PORTA bit 7 |
| دبوس 10 | OSC2/RA7 — Crystal output / PORTA bit 7 alternate |
| دبوس 11 | RC0 — PORTC bit 0 |
| دبوس 12 | RC1 — PORTC bit 1 |
| دبوس 13 | RC2 — PORTC bit 2 |
| دبوس 14 | RC3 — PORTC bit 3 |
| دبوس 15 | RC4 — PORTC bit 4 |
| دبوس 16 | RC5 — PORTC bit 5 |
| دبوس 17 | RC6 — PORTC bit 6 |
| دبوس 18 | RC7 — PORTC bit 7 |
| دبوس 19 | Vss — Ground |
| دبوس 20 | Vdd — Positive supply (2.0V to 5.5V) |
| دبوس 21 | RB0 — PORTB bit 0 / external interrupt 0 |
| دبوس 22 | RB1 — PORTB bit 1 / external interrupt 1 |
| دبوس 23 | RB2 — PORTB bit 2 / external interrupt 2 |
| دبوس 24 | RB3 — PORTB bit 3 / external interrupt 3 |
| دبوس 25 | RB4 — PORTB bit 4 |
| دبوس 26 | RB5 — PORTB bit 5 |
| دبوس 27 | RB6 — PORTB bit 6 / ICSP clock |
| دبوس 28 | RB7 — PORTB bit 7 / ICSP data |
| دبوس 29 | RD0 — PORTD bit 0 |
| دبوس 30 | RD1 — PORTD bit 1 |
| دبوس 31 | RD2 — PORTD bit 2 |
| دبوس 32 | RD3 — PORTD bit 3 |
| دبوس 33 | RD4 — PORTD bit 4 |
| دبوس 34 | RD5 — PORTD bit 5 |
| دبوس 35 | RD6 — PORTD bit 6 |
| دبوس 36 | RD7 — PORTD bit 7 |
| دبوس 37 | Vss — Ground |
| دبوس 38 | Vdd — Positive supply |
| دبوس 39 | RE0 — PORTE bit 0 |
| دبوس 40 | RE1 — PORTE bit 1 |
| دبوس 41 | RE2 — PORTE bit 2 |
| دبوس 42 | RE3 — PORTE bit 3 |
| دبوس 43 | RE4 — PORTE bit 4 |
| دبوس 44 | RE5 — PORTE bit 5 |
| دبوس 45 | RE6 — PORTE bit 6 |
| دبوس 46 | RE7 — PORTE bit 7 |
| دبوس 47 | RF0 — PORTF bit 0 / analog input |
| دبوس 48 | RF1 — PORTF bit 1 / analog input |
| دبوس 49 | RF2 — PORTF bit 2 / analog input |
| دبوس 50 | RF3 — PORTF bit 3 / analog input |
| دبوس 51 | RF4 — PORTF bit 4 / analog input |
| دبوس 52 | RF5 — PORTF bit 5 / analog input |
| دبوس 53 | RF6 — PORTF bit 6 / analog input |
| دبوس 54 | RF7 — PORTF bit 7 / analog input |
| دبوس 55 | RG0 — PORTG bit 0 |
| دبوس 56 | RG1 — PORTG bit 1 |
| دبوس 57 | RG2 — PORTG bit 2 |
| دبوس 58 | RG3 — PORTG bit 3 |
| دبوس 59 | RG4 — PORTG bit 4 |
| دبوس 60 | AVss — Analog ground |
| دبوس 61 | AVdd — Analog supply (tie to Vdd through ferrite) |
| دبوس 62 | RH0 — PORTH bit 0 (where present) |
| دبوس 63 | RH1 — PORTH bit 1 (where present) |
| دبوس 64 | RH2 — PORTH bit 2 (where present) |
| دبوس 65 | RH3 — PORTH bit 3 (where present) |
| دبوس 66 | RH4 — PORTH bit 4 (where present) |
| دبوس 67 | RH5 — PORTH bit 5 (where present) |
| دبوس 68 | RH6 — PORTH bit 6 (where present) |
| دبوس 69 | RH7 — PORTH bit 7 (where present) |
| دبوس 70 | RJ0 — PORTJ bit 0 (where present) |
| دبوس 71 | RJ1 — PORTJ bit 1 (where present) |
| دبوس 72 | RJ2 — PORTJ bit 2 (where present) |
| دبوس 73 | RJ3 — PORTJ bit 3 (where present) |
| دبوس 74 | RJ4 — PORTJ bit 4 (where present) |
| دبوس 75 | RJ5 — PORTJ bit 5 (where present) |
| دبوس 76 | RJ6 — PORTJ bit 6 (where present) |
| دبوس 77 | RJ7 — PORTJ bit 7 (where present) |
| دبوس 78 | Vss — Ground |
| دبوس 79 | Vdd — Positive supply |
| دبوس 80 | NC — Not connected (per datasheet TQFP-80 layout) |
التطبيقات النموذجية
PIC18LF8680-I/PT مناسب لـ 6 التطبيقs: Industrial CAN-bus Control Panels, HVAC Thermostats with TFT/LCD Displays, Motor Drive and PWM Control, Smart Energy Metering Front-Ends, Home Appliance Control Boards, Automotive Body and HVAC Modules (Non-AEC-Q100).
Industrial CAN-bus Control Panels
The PIC18LF8680-I/PT is well suited for industrial CAN-bus control panels because its on-chip CAN 2.0B controller supports 1 Mbit/s communication with 11/29-bit identifiers, removing the need for an external CAN ASIC. Combined with 64 KB of Flash and 3,328 bytes of RAM, the device can host a full CANopen or DeviceNet stack alongside application logic. The 68 I/O pins and 16-channel 10-bit ADC cover keypad scanning, rotary encoder inputs, and analog sensor aggregation typical of a human-machine interface panel.
موصى به
HVAC Thermostats with TFT/LCD Displays
The PIC18LF8680-I/PT's 68 I/O pins comfortably drive character LCDs, small TFT panels with SPI interface, and the capacitive touch keypads used in modern thermostats. Its 2.0V to 5.5V wide supply range supports direct 3.3V operation from a 2-cell AA battery stack, while the NanoWatt sleep modes (down to sub-microamp) preserve idle energy budget. Two analog comparators and the 16-channel 10-bit ADC handle NTC temperature sensors, humidity probes, and airflow sensing simultaneously.
موصى به
Motor Drive and PWM Control
The PIC18LF8680-I/PT integrates two CCP plus one enhanced CCP (ECCP) module, providing up to three pairs of PWM outputs that can drive H-bridges for brushed DC, stepper, or small three-phase BLDC motors. The 40 MHz instruction rate supports PWM frequencies well above 20 kHz, beyond audible noise, while the 10-bit ADC samples current shunts and back-EMF for closed-loop control. Industrial designers use this device for small pumps, valve actuators, and conveyor-segment controllers.
موصى به
Smart Energy Metering Front-Ends
With 16 ADC channels and dual analog comparators, the PIC18LF8680-I/PT can simultaneously sample voltage and current on multiple phases of an energy meter. The 64 KB Flash accommodates metering algorithms (RMS, harmonics, tamper detection), while 1,024 bytes of EEPROM stores tariff tables and calibration constants across power cycles. The CAN 2.0B or USART links to a concentrator or display unit for AMI/AMR systems.
موصى به
Home Appliance Control Boards
Washing machines, dishwashers, ovens, and induction cooktops use the PIC18LF8680-I/PT for user-interface control plus actuator drive coordination. The two USARTs link to inverter or motor control boards while the MSSP interfaces drive LED segment displays. Industrial-grade -40C to +85C temperature range supports kitchen and laundry environments with high thermal stress. EEPROM stores user presets, fault logs, and diagnostic counters.
موصى به
Automotive Body and HVAC Modules (Non-AEC-Q100)
The PIC18LF8680-I/PT's CAN 2.0B, 16-channel ADC, and 68 I/O support body controllers for HVAC blend doors, mirror modules, and seat controllers in non-safety automotive systems. Designers leverage the LF 3.3V operation with low quiescent current for always-on networks. For AEC-Q100 qualified automotive applications, Microchip's Q-suffix variants (e.g., PIC18F8680-Q) are required - the I-suffix part is industrial grade and not qualified.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC18LF8680-I/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC18F8680-I/PT | PIC18F8722-I/PT | PIC18F8621-I/PT | PIC18LF8722-I/PT | PIC18F8585-I/PT | PIC18LF8527-I/PT |
|---|---|---|---|---|---|---|---|
| Package | TQFP-80 (PT) 12x12 mm | TQFP-80 (PT) 12x12 mm - same | TQFP-80 (PT) 12x12 mm - same | TQFP-80 (PT) 12x12 mm - same | TQFP-80 (PT) 12x12 mm - same | TQFP-80 (PT) 12x12 mm - same | TQFP-80 (PT) 12x12 mm - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 64 KB | 64 KB | 128 KB | 64 KB | 128 KB | 48 KB | 48 KB |
| RAM | 3,328 bytes | 3,328 bytes | 3,936 bytes | 3,328 bytes | 3,936 bytes | 3,328 bytes | 3,936 bytes |
| Minimum Vdd | 2.0 V (LF) | 4.2 V (F) | 4.2 V (F) | 4.2 V (F) | 2.0 V (LF) | 4.2 V (F) | 2.0 V (LF) |
| Max Clock Speed | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 12-bit |
| CAN 2.0B | Yes | Yes | Yes | Yes (ECAN) | Yes | Yes | Yes |
| Operating Temperature | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
أبرز الفروقات
- Low-voltage 2.0V operation with full 40 MHz performance (مقابلPIC18F8680-I/PT)
- Best price/performance for 64 KB code budget (مقابلPIC18F8722-I/PT)
- On-chip CAN 2.0B eliminates external CAN controller (مقابلPIC18F8621-I/PT)
ملاحظات التصميم
Decouple every Vdd/AVdd pair with a 0.1uF ceramic in parallel with a 10uF tantalum or ceramic bulk capacitor placed within 5 mm of the pins. AVdd should connect to Vdd through a ferrite bead for ADC noise isolation. For battery-powered designs, the NanoWatt Sleep mode reduces Iq to sub-microamp by halting the CPU clock; assert Sleep before entering idle, and wake via external interrupt or WDT timeout.
Route AVss/AVdd with separate analog ground/power traces back to a single-point star near the regulator. The 16 analog inputs share one A/D converter - minimize analog trace length and add a 100 ohm isolation resistor at each analog input pin if the source impedance exceeds 2.5 kohm. Keep digital switching signals (CCP/PWM outputs) away from analog input traces, or use a ground guard trace to prevent digital-to-analog crosstalk.
For CAN bus designs, route CANH and CANL as a differential pair with characteristic impedance of 120 ohm, terminated with 120 ohm at each bus end. The internal CAN controller requires a clock-stable oscillator; use HS mode (10 MHz to 40 MHz) for CAN, not internal RC, to meet bit-timing accuracy. ISO 11898-1 conformance testing requires the bus idle level to settle within 5 bit times.
Do not leave any I/O pin floating; configure unused I/O as outputs driving low. The MCLR pin must have a 10 kohm pull-up to Vdd - never tie MCLR directly to Vdd as in-circuit programming will fail. When using the 32 kHz Timer1 oscillator as a low-power clock, the secondary oscillator pins (RC0/RC1) must be configured for LP mode, not digital I/O, or the oscillator will not start.
The TQFP-80 (PT) package has a 0.5 mm pitch and 12x12 mm body - use 0.15 mm/0.15 mm trace/space design rules, with 0.2 mm vias-in-pad acceptable for thermal relief. Place a thermal pad under the exposed die (central pad) - this pad is not electrically connected on PIC18LF8680, so it can be soldered to GND for thermal dissipation but cannot carry high current. Use no-clean flux and N2 reflow for best results.
معلومات الامتثال
The PT suffix designates Pb-free / RoHS-compliant TQFP-80 packaging per the Digchip listing ("LEAD FREE, TQFP-64" - verified web data, 2026-09-29). The I-grade part is not AEC-Q100 qualified; for automotive applications use Q-suffix variants such as PIC18F8680T-I/PT with AEC-Q100 grade 1 (-40C to +125C).
