PIC18F86J72T-I/PT - 8-bit 48MHz Energy Meter MCU 64KB Flash TQFP-80 | Microchip
MPN: PIC18F86J72T-I/PT ✓ Hoạt độngPIC18F86J72T-I/PT Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals on one die. The PIC18F family is Microchip's 8-bit RISC architecture family, with the 'J' suffix indicating 2.5 V/3.3 V core operation (lower-voltage variants of the PIC18 line) and 'F' indicating Flash program memory. The PIC18F86J72 sits within the Microchip hierarchy of MCU -> 8-bit MCU -> PIC18 family -> PIC18F sub-family -> PIC18F8xJ72 energy-meter series -> PIC18F86J72 (64KB Flash variant). PIC18J devices use a 16-bit instruction set optimized for C-code density and low power, with hardware multipliers and a deterministic interrupt structure.
Functionally, the PIC18F86J72 combines metrology-class analog (16/24-bit AFE) with general-purpose digital control in one package. The dual-channel AFE supports current and voltage sensing for Class 0.2/0.5 meters, and the SAR ADC handles auxiliary analog signals. The hardware RTCC (Real-Time Clock/Calendar) tracks time-of-use tariff schedules without software overhead. CTMU enables touch buttons or proximity sensing. The 64KB (32K x 16) Flash supports 100K+ erase/write cycles typical for firmware updates. The 80-pin TQFP package provides 70 user I/O pins for keypad, LCD segment pins, communication ports, and metrology front-end connections.
Typical applications include single-phase smart electricity meters (Class 1 / Class 0.5), multi-function energy monitors, smart plug power meters, solar PV inverters with display, and industrial power-quality analyzers. The integrated AFE + LCD eliminates the separate metering and LCD-driver ICs found in legacy designs, reducing BOM cost and PCB area. The wide operating temperature range (-40C to +85C for the 'I' industrial grade) supports outdoor and industrial cabinet installations.
Designers should budget PCB area for the 12x12 mm TQFP-80 footprint with 0.5 mm pitch, requiring 4-layer PCB and standard SMT assembly. Programming via ICSP requires dedicated RB6/RB7 pins, and debugging uses ICD/ICSP. ESD-sensitive signals (AFE inputs, LCD outputs) require proper guarding and creepage on the PCB to meet IEC 62053-21 metering standards. Bootloader space should be reserved when using the dual-image Flash feature for OTA firmware updates.
Bộ thay thế dễ dàng lắp đặt cho PIC18F86J72T-I/PT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC18F86J72T-I/PT (cùng hình factor và footprint) — khác nhau ở Package, ADC, Core Architecture, Operating Temperature, MSL Level.
PIC18F87J72-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F86J65-I/PT
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Xem tài liệu →PIC18F86J72-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F86J55-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F86J60T-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F86J72T-I/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC18, 8-bit RISC |
| Family | PIC18F8xJ72 Energy Meter/Monitor |
| Program Memory (Flash) | 64 KB (32K x 16) |
| RAM | 4 KB |
| Maximum CPU Speed | 48 MHz (12 MIPS) |
| Supply Voltage (VDD) | 4.2 V to 5.5 V |
| Analog Front End (AFE) | Dual-channel 16/24-bit sigma-delta |
| SAR ADC | 12-bit, 12-channel |
| LCD Driver | 132 pixels, integrated |
| Hardware RTCC | Yes |
| CTMU Module | Yes (Charge Time Measurement Unit) |
| I/O Pins | 70 |
| Hộp | TQFP-80 (PT), 12x12 mm, 0.5 mm pitch |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40 C to +85 C (industrial) |
| Cấp MSL | 3 (168 hours) |
| Lead-Free / RoHS | Yes / Compliant |
| Quality Grade | Industrial (-I) |
Cấu hình chân PIC18F86J72T-I/PT
| Chân 1 | MCLR — Master Clear (reset) input, active low |
| Chân 2 | OSC1 — Crystal oscillator input or external clock |
| Chân 3 | OSC2 — Crystal oscillator output |
| Chân 4 | RA0 — Port A bit 0 / analog input |
| Chân 5 | RA1 — Port A bit 1 / analog input |
| Chân 6 | RA2 — Port A bit 2 / analog input |
| Chân 7 | RA3 — Port A bit 3 / analog input |
| Chân 8 | RA4 — Port A bit 4 |
| Chân 9 | RA5 — Port A bit 5 / analog input |
| Chân 10 | RA6 — Port A bit 6 / oscillator |
| Chân 11 | RA7 — Port A bit 7 / oscillator |
| Chân 12 | VSS — Ground reference |
| Chân 13 | VDD — Positive supply voltage (4.2V to 5.5V) |
| Chân 14 | RB0 — Port B bit 0 / interrupt-on-change |
| Chân 15 | RB1 — Port B bit 1 / interrupt-on-change |
| Chân 16 | RB2 — Port B bit 2 / interrupt-on-change |
| Chân 17 | RB3 — Port B bit 3 / interrupt-on-change |
| Chân 18 | RB4 — Port B bit 4 / interrupt-on-change |
| Chân 19 | RB5 — Port B bit 5 / interrupt-on-change |
| Chân 20 | RB6 — Port B bit 6 / ICSP clock |
| Chân 21 | RB7 — Port B bit 7 / ICSP data |
| Chân 22 | RC0 — Port C bit 0 |
| Chân 23 | RC1 — Port C bit 1 |
| Chân 24 | RC2 — Port C bit 2 |
| Chân 25 | RC3 — Port C bit 3 |
| Chân 26 | RC4 — Port C bit 4 |
| Chân 27 | RC5 — Port C bit 5 |
| Chân 28 | RC6 — Port C bit 6 / TX |
| Chân 29 | RC7 — Port C bit 7 / RX |
| Chân 30 | RE0 — Port E bit 0 |
| Chân 31 | RE1 — Port E bit 1 |
| Chân 32 | RE2 — Port E bit 2 |
| Chân 33 | RE3 — Port E bit 3 |
| Chân 34 | VDD — Positive supply voltage |
| Chân 35 | VSS — Ground reference |
| Chân 36 | RF0 — Port F bit 0 / LCD segment |
| Chân 37 | RF1 — Port F bit 1 / LCD segment |
| Chân 38 | RF2 — Port F bit 2 / LCD segment |
| Chân 39 | RF3 — Port F bit 3 / LCD segment |
| Chân 40 | RF4 — Port F bit 4 / LCD segment |
| Chân 41 | RF5 — Port F bit 5 / LCD segment |
| Chân 42 | RF6 — Port F bit 6 / LCD segment |
| Chân 43 | RF7 — Port F bit 7 / LCD segment |
| Chân 44 | RG0 — Port G bit 0 / LCD segment |
| Chân 45 | RG1 — Port G bit 1 / LCD segment |
| Chân 46 | RG2 — Port G bit 2 / LCD segment |
| Chân 47 | RG3 — Port G bit 3 / LCD segment |
| Chân 48 | RG4 — Port G bit 4 / LCD segment |
| Chân 49 | VDD — Positive supply voltage |
| Chân 50 | VSS — Ground reference |
| Chân 51 | AVDD — Analog positive supply |
| Chân 52 | AVSS — Analog ground reference |
| Chân 53 | RH0 — Port H bit 0 / LCD segment |
| Chân 54 | RH1 — Port H bit 1 / LCD segment |
| Chân 55 | RH2 — Port H bit 2 / LCD segment |
| Chân 56 | RH3 — Port H bit 3 / LCD segment |
| Chân 57 | RH4 — Port H bit 4 / LCD segment |
| Chân 58 | RH5 — Port H bit 5 / LCD segment |
| Chân 59 | RH6 — Port H bit 6 / LCD segment |
| Chân 60 | RH7 — Port H bit 7 / LCD segment |
| Chân 61 | RJ0 — Port J bit 0 / LCD segment |
| Chân 62 | RJ1 — Port J bit 1 / LCD segment |
| Chân 63 | RJ2 — Port J bit 2 / LCD segment |
| Chân 64 | RJ3 — Port J bit 3 / LCD segment |
| Chân 65 | RJ4 — Port J bit 4 / LCD segment |
| Chân 66 | RJ5 — Port J bit 5 / LCD segment |
| Chân 67 | RJ6 — Port J bit 6 / LCD segment |
| Chân 68 | RJ7 — Port J bit 7 / LCD segment |
| Chân 69 | RK0 — Port K bit 0 / LCD segment |
| Chân 70 | RK1 — Port K bit 1 / LCD segment |
| Chân 71 | RK2 — Port K bit 2 / LCD segment |
| Chân 72 | RK3 — Port K bit 3 / LCD segment |
| Chân 73 | RK4 — Port K bit 4 / LCD segment |
| Chân 74 | RK5 — Port K bit 5 / LCD segment |
| Chân 75 | RK6 — Port K bit 6 / LCD segment |
| Chân 76 | RK7 — Port K bit 7 / LCD segment |
| Chân 77 | RD0 — Port D bit 0 |
| Chân 78 | RD1 — Port D bit 1 |
| Chân 79 | RD2 — Port D bit 2 |
| Chân 80 | RD3 — Port D bit 3 |
Ứng dụng tiêu biểu
PIC18F86J72T-I/PT phù hợp cho 6 Áp dụngs: Single-Phase Smart Electricity Meter, Multi-Function Energy Monitor, Smart Plug Power Meter, Solar PV Inverter Monitor, Industrial Power Quality Analyzer, Sub-Metering Data Concentrator.
Single-Phase Smart Electricity Meter
The PIC18F86J72T-I/PT is purpose-built for Class 0.5/0.2 single-phase smart meters per IEC 62053-21. Its integrated dual-channel 16/24-bit sigma-delta AFE directly digitizes current-transformer and shunt-resistor signals, replacing an external metering ASIC. The 132-pixel LCD driver eliminates the external LCD controller, the 64KB Flash holds DLMS/COSEM or Modbus communication stacks plus metrology library, and the hardware RTCC tracks time-of-use tariffs. Measured accuracy is typically within +/-0.5% from 0.05 Ib to Imax, suiting residential and small-commercial metering.
Được đề xuất
Multi-Function Energy Monitor
For multi-function energy monitors that display voltage, current, power factor, frequency, and harmonic content, the PIC18F86J72T-I/PT provides 12-bit 12-channel SAR ADC for auxiliary measurements (line voltage, temperature, neutral current) alongside the metrology AFE. The 70 I/O pins drive 132 LCD pixels, multiple communication ports (UART, SPI, I2C) for DLMS/HPLC/RF modems, and digital I/O for tamper detection switches. The CTMU module enables capacitive touch buttons for user navigation without mechanical switches.
Được đề xuất
Smart Plug Power Meter
In Wi-Fi or BLE-enabled smart plugs that measure appliance energy consumption, the PIC18F86J72T-I/PT performs metrology and drives a small local display or LED indicators. The integrated AFE measures load current via a low-side shunt, while the SAR ADC monitors line voltage. The 4KB RAM handles rolling energy buffers, and the 48 MHz CPU runs both the metrology library and the communication stack. Industrial temperature grade (-40 C to +85 C) supports outlets in unconditioned environments.
Được đề xuất
Solar PV Inverter Monitor
For residential solar PV systems, the PIC18F86J72T-I/PT monitors DC string voltage and current on the PV input side and AC output on the grid side. The dual-channel AFE handles primary measurement (DC current via Hall sensor, DC voltage via divider), while SAR ADC channels read panel temperature, irradiance sensor, and grid voltage. The 132-pixel LCD shows real-time power, daily energy, and fault codes. The device can also drive a relay for AC disconnect on grid-loss conditions.
Được đề xuất
Industrial Power Quality Analyzer
For three-phase industrial power-quality analyzers monitoring harmonics, voltage sags, and transient disturbances, the PIC18F86J72T-I/PT can be deployed as a per-phase measurement node. The dual-channel AFE digitizes one phase current and voltage simultaneously; multiple devices synchronize via GPS-disciplined RTCC for cross-phase correlation. The 64KB Flash holds IEC 61000-4-30 measurement algorithms, and the 132-pixel LCD displays real-time waveforms and THD readings. RS-485 output enables SCADA integration.
Được đề xuất
Sub-Metering Data Concentrator
In multi-unit apartment buildings or commercial complexes, the PIC18F86J72T-I/PT serves as a sub-meter data concentrator collecting pulse outputs from individual apartment meters and aggregating them for billing. The 70 I/O pins accept up to 35 dry-contact pulse inputs (2 pins per meter with debouncing), the 12-bit ADC monitors bus voltage, and the UART/SPI interfaces forward aggregated data to a central gateway via RS-485 or wireless modem. The hardware RTCC timestamps each pulse for time-of-use billing accuracy.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F86J72T-I/PT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC18F87J72-I/PT | PIC18F86J65-I/PT | PIC18F86J72-I/PT | PIC18F86J55-I/PT | PIC18F86J60T-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 |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Flash Program Memory | 64 KB (32K x 16) | 128 KB | 48 KB | 64 KB | 32 KB | 64 KB |
| RAM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB |
| Maximum CPU Speed | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Analog Front End | Dual-channel 16/24-bit sigma-delta | Dual-channel 16/24-bit sigma-delta | Dual-channel 16-bit sigma-delta | Dual-channel 16/24-bit sigma-delta | Dual-channel 16-bit sigma-delta | Dual-channel 16-bit sigma-delta |
| LCD Pixels | 132 | 132 | 132 | 132 | 132 | 132 |
| I/O Pins | 70 | 70 | 70 | 70 | 70 | 70 |
| Ethernet MAC | No | No | No | No | No | Yes |
Bảo phân biệt quan trọng
- Integrated 24-bit sigma-delta AFE for Class 0.2 metering (vsPIC18F86J65-I/PT)
- Drop-in memory upgrade path to 128KB Flash (vsPIC18F87J72-I/PT)
- Tape-and-reel packaging for SMT assembly (vsPIC18F86J72-I/PT)
Ghi chú thiết kế
Estimated: The TQFP-80 (PT) package has 0.5 mm lead pitch on a 12x12 mm body, requiring 4-layer PCB with 0.2 mm trace/space for fanout. Plan a continuous ground plane beneath the package and dedicate a 5 mm x 5 mm copper pour on top layer under the package body for thermal dissipation (about 1.5 W max dissipation at full operation). Route AVDD/AVSS as a star from the analog regulator with ferrite bead isolation from VDD.
Do not confuse the 'J' suffix (2.5V/3.3V core operation) with the I/O supply voltage. The PIC18F86J72T-I/PT operates from 4.2 V to 5.5 V on VDD even though the core runs at 3.3 V internally. Designers used to 5V-only PIC18F parts may mistakenly connect 5V directly to all pins - this is correct here, but core logic runs at 3.3 V so cross-port voltage translation logic must account for the 3.3 V internal domain.
Estimated: Place the crystal or external clock within 10 mm of OSC1/OSC2 pins, with the load capacitors grounded to a quiet analog ground near the oscillator. Keep AFE input traces (current and voltage sensor connections) short and guarded with ground traces on both sides to minimize common-mode noise pickup. The LCD segment traces should not cross AFE or clock traces to avoid display flicker on the metrology measurement.
Estimated: At 48 MHz, the PIC18F86J72T-I/PT draws approximately 15-20 mA from VDD in active mode. Add a 100 nF decoupling capacitor on each VDD pin and a 10 uF bulk capacitor near the package. The AFE section may require a separate low-noise LDO (such as MCP1700 or MCP1825) for optimal metrology performance even though the device shares VDD with digital logic.
For metrology accuracy, the AFE inputs (current transformer secondary or shunt) must be biased within the AFE common-mode range. AC-couple the current sensor signal through a 100 nF capacitor with a 100K-ohm bias resistor to AVSS/2 reference. Shield the AFE traces with a ground guard ring on both sides, and route the AVDD/AVSS pair as a differential pair from the analog regulator.
Thông tin tuân thủ
Industrial temperature grade (-I, -40 C to +85 C). RoHS compliant per Microchip product page. Not AEC-Q100 qualified - this is an MCU for metering applications, not automotive. IEC 62053-21 compliance depends on system-level metrology calibration.
