PIC18F26Q84T-I/SO - 64KB Flash 8-bit MCU CAN-FD 28-SOIC | Microchip
MPN: PIC18F26Q84T-I/SO ✓ Hoạt độngPIC18F26Q84T-I/SO Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), working memory (RAM), and a rich set of peripheral interfaces (ADC, timers, communication controllers) on one die. Within the product taxonomy, an MCU sits under microprocessor ICs -> microcontrollers -> 8-bit microcontrollers -> Flash microcontrollers. The PIC18-Q84 family specifically targets cost-optimized real-time control and CAN-FD-connected nodes where determinism and reduced firmware burden matter more than raw CPU throughput.
Key features include a 12-bit ADC with computation (ADC2), a 5-bit DAC, multiple Core Independent Peripherals such as CWG, CCP, PWM, UTMR, HLT, and a windowed watchdog (WWDT), plus a CAN FD controller. The 8-bit PIC18 core delivers deterministic interrupt latency and a Harvard bus architecture. The 28-SOIC package provides an easy-to-handle surface-mount footprint with 25 usable I/O pins.
Typical applications include automotive body and sensor networks, industrial CAN-FD nodes, building automation gateways, HVAC controllers, and sensor fusion front-ends. The built-in CAN FD peripheral removes the need for an external transceiver-side MCU on small sub-nodes, while the 12-bit ADC and op-amp peripherals simplify analog front-end designs.
When designing with this device, allocate sufficient headroom for the CAN-FD message buffers in RAM and confirm the PCB layout meets IEC 61000-4-2 ESD guidelines for automotive/industrial CAN bus protection. Programming is supported by MPLAB X IDE and the MPLAB Code Configurator (MCC).
Bộ thay thế dễ dàng lắp đặt cho PIC18F26Q84T-I/SO — 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 PIC18F26Q84T-I/SO (cùng hình factor và footprint) — khác nhau ở Operating Temperature, Package, ADC, Program Memory (Flash), EEPROM.
PIC18F26Q84-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F26Q84-E/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F26Q43T-I/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F26K83-I/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F26K42-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F26Q10-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F26Q84T-I/SO Tỷ lệ tối đa & tính chất điện
| Core | PIC18 8-bit |
| Program Memory (Flash) | 64 KB |
| Data RAM | 8 KB |
| Maximum CPU Frequency | 64 MHz |
| Operating Voltage Range | 1.8 V to 5.5 V |
| ADC | 12-bit, ADC2 (with computation) |
| DAC | 5-bit |
| Comparators | Yes |
| PWM / CCP / CWG | Yes (CIPs) |
| UTMR (Universal Timer) | Yes |
| HLT (Hardware Limit Timer) | Yes |
| Windowed Watchdog (WWDT) | Yes |
| CAN FD | Yes |
| I/O Pins | 25 (max) |
| Hộp | 28-pin SOIC (SO) |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +85C (Industrial, 'I') |
| Cấp MSL | 1 |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân PIC18F26Q84T-I/SO
| Chân 1 | MCLR — Master Clear (reset, active-low) |
| Chân 2 | RA0 — Port A bit 0 / analog input |
| Chân 3 | RA1 — Port A bit 1 / analog input |
| Chân 4 | RA2 — Port A bit 2 / analog input |
| Chân 5 | RA3 — Port A bit 3 / analog input |
| Chân 6 | RA4 — Port A bit 4 / analog input |
| Chân 7 | RA5 — Port A bit 5 / analog input |
| Chân 8 | VSS — Ground |
| Chân 9 | RA7 — Port A bit 7 / OSC1 |
| Chân 10 | RA6 — Port A bit 6 / OSC2 |
| Chân 11 | RC0 — Port C bit 0 |
| Chân 12 | RC1 — Port C bit 1 |
| Chân 13 | RC2 — Port C bit 2 |
| Chân 14 | RC3 — Port C bit 3 |
| Chân 15 | RC4 — Port C bit 4 |
| Chân 16 | RC5 — Port C bit 5 |
| Chân 17 | RC6 — Port C bit 6 / CAN TX |
| Chân 18 | RC7 — Port C bit 7 / CAN RX |
| Chân 19 | VSS — Ground |
| Chân 20 | VDD — Positive supply |
| Chân 21 | RB0 — Port B bit 0 / interrupt |
| Chân 22 | RB1 — Port B bit 1 |
| Chân 23 | RB2 — Port B bit 2 |
| Chân 24 | RB3 — Port B bit 3 |
| Chân 25 | RB4 — Port B bit 4 |
| Chân 26 | RB5 — Port B bit 5 |
| Chân 27 | RB6 — Port B bit 6 / ICD PGC |
| Chân 28 | RB7 — Port B bit 7 / ICD PGD |
Ứng dụng tiêu biểu
PIC18F26Q84T-I/SO phù hợp cho 6 Áp dụngs: CAN-FD Industrial Sensor Nodes, Building Automation Gateways, Automotive Body Electronics, HVAC and Climate Controllers, Sensor Fusion Front-Ends, Industrial Control Communication Modules.
CAN-FD Industrial Sensor Nodes
The PIC18F26Q84T-I/SO is purpose-built for CAN-FD-connected industrial sensor nodes where deterministic communication and integrated analog front-end matter most. Its hardware CAN FD controller supports ISO 11898-1:2015 frames at 1 Mbps nominal bit rate, while the 12-bit ADC2 with computation (averaging, oversampling, threshold compare) can digitize sensor signals without CPU intervention via DMA-like Core Independent Peripheral (CIP) chaining. The 8 KB SRAM comfortably holds CAN-FD message objects, ADC double buffers, and a small real-time OS or state machine. Compared with external-CAN solutions, integrating the CAN-FD controller on-die saves $0.30-$0.50 BOM and reduces PCB area. The 1.8V-5.5V supply range lets the same PCB run from 3.3V sensors or 5V industrial rails. For harsh environments the industrial -40C to +85C temperature grade is appropriate, and Microchip's MPLAB Code Configurator generates CIP setup code automatically.
Được đề xuất
Building Automation Gateways
Building automation gateways benefit from the PIC18F26Q84T-I/SO's combination of CAN-FD bus connectivity and rich Core Independent Peripherals. In a typical BACnet or KNX-to-CAN bridge, the MCU aggregates sensor messages, runs CIP-driven PWM for HVAC damper control, and forwards packets to a host controller. The 64 KB Flash accommodates gateway firmware plus a small bootloader for OTA updates, while the 8 KB SRAM holds protocol buffers. The 12-bit ADC2 reads thermistor/resistive sensor inputs with hardware averaging, freeing the core for stack processing. Compared with discrete CAN-MCU designs, integrating peripherals into one 28-SOIC device reduces BOM and PCB footprint by roughly 30%. The industrial temperature grade suits unconditioned equipment rooms.
Được đề xuất
Automotive Body Electronics
Within automotive body electronics - door modules, mirror controllers, seat-position memory, lighting controllers - the PIC18F26Q84T-I/SO delivers CAN-FD bandwidth and Core Independent Peripheral flexibility at a competitive cost. The integrated CAN FD controller manages 500 kbps-2 Mbps body bus traffic, while the CWG (Complementary Waveform Generator) and PWM peripherals drive LED matrix lighting and motor pre-drivers without firmware intervention. Hardware windowed watchdog (WWDT) and HLT (Hardware Limit Timer) CIPs improve functional safety, detecting runaway code or stuck states that a pure firmware loop could miss. The 12-bit ADC2 with on-chip computation reads multiple position sensors via round-robin sequencing. For non-safety-critical body ECUs the industrial temperature grade is often sufficient; safety-critical domains require the AEC-Q100-qualified PIC18-Q84 family variants offered by Microchip.
Được đề xuất
HVAC and Climate Controllers
HVAC and climate controllers leverage the PIC18F26Q84T-I/SO's 12-bit ADC2 with computation for temperature/humidity sensing and its PWM/CWG peripherals for fan and valve actuation. The Universal Timer (UTMR) and CCP modules capture tachometer pulses from fan motors, while the Hardware Limit Timer (HLT) can shut down outputs on over-temperature events without CPU intervention. With 64 KB Flash the firmware can hold full PID control loops, defrost state machines, and Modbus/CAN-FD communication stacks. The industrial -40C to +85C temperature range supports rooftop and basement equipment installations. Designers can use MPLAB Code Configurator (MCC) to generate peripheral setup code, reducing development time by approximately 40% versus manual SFR configuration.
Được đề xuất
Sensor Fusion Front-Ends
Sensor fusion front-ends combining accelerometers, gyroscopes, pressure sensors, and temperature sensors benefit from the PIC18F26Q84T-I/SO's multiple ADC channels and Core Independent Peripheral (CIP) chaining. The 12-bit ADC2 with computation (oversampling, averaging, threshold compare) can sample multiple sensor channels autonomously via DMA-like triggers, offloading the CPU. The hardware op-amp peripherals provide gain stages for low-output sensors without external amplifiers, saving $0.10-$0.20 BOM per channel. With 8 KB SRAM and 64 KB Flash the MCU holds sensor calibration tables, simple Kalman-filter firmware, and a CAN-FD uplink to the central controller. The 1.8V-5.5V supply supports coin-cell, 3.3V regulated, or 5V direct sensor power. Compared with discrete ADC-plus-MCU designs, integration reduces board area by approximately 25%.
Được đề xuất
Industrial Control Communication Modules
Industrial control communication modules - CAN-FD repeaters, gateway bridges, protocol converters - use the PIC18F26Q84T-I/SO as the local supervisor and message-handling MCU. Its CAN FD controller handles bus arbitration, error confinement, and frame filtering in hardware, leaving firmware bandwidth for protocol translation. The 64 KB Flash stores gateway tables and Modbus/CANopen stacks, while the 8 KB SRAM buffers message objects. The 12-bit ADC monitors bus supply voltage for diagnostics, and the WWDT CIP forces a clean reset on firmware hang. Compared with NXP or ST equivalents, the PIC18F26Q84T-I/SO offers competitive CAN-FD integration with Microchip's extensive CIP ecosystem, which can cut firmware complexity by 20-30% on real-time control tasks. The industrial temperature grade and 28-SOIC footprint suit DIN-rail and PCB-mount modules.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F26Q84T-I/SO — 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 | PIC18F26Q84-I/SO | PIC18F26Q84-E/SO | PIC18F26Q43T-I/SO | PIC18F26K83-I/SO | PIC18F26K42-I/SO | PIC18F26Q10-I/SO |
|---|---|---|---|---|---|---|---|
| Package | 28-SOIC | 28-SOIC (same) | 28-SOIC (same) | 28-SOIC (same) | 28-SOIC (same) | 28-SOIC (same) | 28-SOIC (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | PIC18 8-bit | PIC18 8-bit | PIC18 8-bit | PIC18 8-bit | PIC18 8-bit | PIC18 8-bit | PIC18 8-bit |
| Flash Memory | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB |
| RAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| Maximum Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| CAN FD | Yes | Yes | Yes | No | No | No | No |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +125C (extended) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Bảo phân biệt quan trọng
- Hardware CAN FD controller on-die (vsPIC18F26K83-I/SO)
- Industrial temperature grade -40C to +85C standard (vsPIC18F26Q84-E/SO)
- Larger SRAM (8 KB) for protocol buffers (vsPIC18F26Q10-I/SO)
Ghi chú thiết kế
Place a 100 nF decoupling capacitor as close as possible to each VDD pin (pin 20) and a bulk 10 uF tantalum or ceramic capacitor on the main supply rail. The PIC18F26Q84T-I/SO can operate from 1.8V to 5.5V; in 5V designs, add a ferrite bead in series with the analog VDD rail to reduce digital switching noise from coupling into the 12-bit ADC2 measurements. For low-power sleep modes (e.g., 50 nA Sleep), ensure MCLR is pulled high through a 10 kohm resistor and unused I/O pins are configured as outputs low to eliminate floating-input leakage.
The 28-SOIC package has a thermal resistance (theta JA) of approximately 80 C/W. At maximum operating current in active mode (about 10 mA at 64 MHz), self-heating is negligible (less than 1 C rise). However, in continuous CAN-FD traffic at 1 Mbps with all peripherals active, internal dissipation can reach 30-40 mW, resulting in a 2-3 C junction rise - well within the -40C to +85C industrial range. Estimated: theta_JA 80 C/W x 0.040 W = 3.2 C rise above ambient.
A common design mistake is omitting the ICD (In-Circuit Debugger) connection on pins RB6/RB7 (PGC/PGD). Without these connections, firmware debug via MPLAB X IDE is impossible, and a problematic firmware update can brick the device. Another pitfall is configuring the CAN FD peripheral without enabling the peripheral clock gating in PMD (Peripheral Module Disable) registers, which leaves the CAN module in reset. Finally, do not connect the 12-bit ADC reference pins to noisy digital traces; use a dedicated analog ground island with a single-point connection to digital ground.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Standard industrial -I temperature grade (-40C to +85C); for AEC-Q100 automotive qualification, evaluate the PIC18F26Q84-E/SO family variants.
