PIC18F45Q43T-I/MP - 8-bit MCU, 32KB Flash, 64MHz | Microchip
MPN: PIC18F45Q43T-I/MP ✓ Hoạt độngPIC18F45Q43T-I/MP Tóm tắt
An 8-bit microcontroller (MCU) is a programmable microprocessor-on-a-chip optimized for embedded control. It integrates a CPU, non-volatile program memory (Flash), volatile data memory (SRAM), EEPROM for parameter storage, and a rich set of peripherals such as timers, ADC, PWM, communication interfaces (UART, SPI, I2C), and increasingly, on-chip analog and logic peripherals. PIC18 devices sit in the hierarchy 8-bit MCU -> PIC18 family -> enhanced mid-range core -> low-power XLP technology platform. They are widely used for deterministic real-time control in industrial, automotive, consumer, and IoT products.
Key features of the PIC18F45Q43 include three 16-bit dual-output PWMs (six PWM channels), a 12-bit ADC with computation (ADCC), an 8-bit DAC, comparators, six channels of DMA, vectored interrupts with fixed three-cycle latency, and high/low priority selection. The device operates from 1.8 V to 5.5 V, supports eXtreme Low Power (XLP) sleep currents in the nanoamp range, and integrates a 32 kHz internal oscillator plus a 64 MHz HFINTOSC for flexible clocking.
Architecturally, the Q43 family is built around Core Independent Peripherals that can be chained through the Peripheral Pin Select (PPS) and event system to perform sensor reading, signal generation, and protection functions without waking the CPU. The result is reduced firmware complexity, deterministic interrupt response, and lower average power consumption. Memory-mapped configuration registers allow fine-grained tuning of analog, timing, and interconnect behavior.
Typical applications include industrial sensor nodes, low-power IoT edge devices, motor and lighting control, USB-CDC human-interface devices, and consumer appliances requiring small footprint and tight code/data integration. The 40-pin QFN package suits space-constrained PCBs while exposing 36 I/O lines.
For design success, place a 0.1 uF decoupling capacitor adjacent to each VDD pin and a bulk capacitor near the AVdd rail. Always configure unused pins as outputs low and use the PPS system to remap peripherals instead of hard-wiring signals. Verify in-circuit programming via ICSP requires dedicated PGC/PGD pins and proper MCLR pull-up design.
This page aggregates distributor pricing, drop-in Q43 and Q10 alternatives, application guidance, and design notes not collected in any single manufacturer document.
Bộ thay thế dễ dàng lắp đặt cho PIC18F45Q43T-I/MP — 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 PIC18F45Q43T-I/MP (cùng hình factor và footprint) — khác nhau ở Package, DAC, ADC, Program Memory (Flash), Core Architecture.
PIC18F45Q43-I/MP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F45Q43-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F46Q43T-I/MP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F45Q10T-I/MP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F45K42T-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F45Q10-I/MP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F45Q43T-I/MP Tỷ lệ tối đa & tính chất điện
| Core | PIC18 enhanced mid-range 8-bit |
| Maximum CPU Clock Frequency | 64 MHz |
| Instruction Throughput | 16 MIPS |
| Program Memory (Flash) | 32 KB |
| Data SRAM | 2 KB |
| Data EEPROM | 1 KB |
| Operating Voltage Range | 1.8 V to 5.5 V |
| I/O Pins | 36 |
| ADC | 12-bit ADCC |
| DAC | 8-bit |
| PWM Channels | 6 (3x 16-bit dual-output) |
| DMA Channels | 6 |
| Comparators | Yes |
| Hộp | 40-pin QFN (MP) 5x5 mm |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 1 |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18F45Q43T-I/MP
| Chân 1 | ICSPDAT/RA0 — ICSP data / Port A bit 0 |
| Chân 2 | ICSPCLK/RA1 — ICSP clock / Port A bit 1 |
| Chân 3 | MCLR/RA3 — Reset input (active low) / Port A bit 3 |
| Chân 4 | RA4 — Port A bit 4 |
| Chân 5 | RA5 — Port A bit 5 |
| Chân 6 | RA6 — Port A bit 6 |
| Chân 7 | RA7 — Port A bit 7 |
| Chân 8 | VSS — Ground reference |
| Chân 9 | VDD — Positive supply voltage |
| Chân 10 | RB0 — Port B bit 0 (PPS-remappable) |
| Chân 11 | RB1 — Port B bit 1 (PPS-remappable) |
| Chân 12 | RB2 — Port B bit 2 (PPS-remappable) |
| Chân 13 | RB3 — Port B bit 3 (PPS-remappable) |
| Chân 14 | RB4 — Port B bit 4 (PPS-remappable) |
| Chân 15 | RB5 — Port B bit 5 (PPS-remappable) |
| Chân 16 | RB6 — Port B bit 6 (PPS-remappable, ICSPCLK) |
| Chân 17 | RB7 — Port B bit 7 (PPS-remappable, ICSPDAT) |
| Chân 18 | VSS — Ground reference |
| Chân 19 | VDD — Positive supply voltage |
| Chân 20 | RC0 — Port C bit 0 (PPS-remappable) |
| Chân 21 | RC1 — Port C bit 1 (PPS-remappable) |
| Chân 22 | RC2 — Port C bit 2 (PPS-remappable) |
| Chân 23 | RC3 — Port C bit 3 (PPS-remappable) |
| Chân 24 | RC4 — Port C bit 4 (PPS-remappable) |
| Chân 25 | RC5 — Port C bit 5 (PPS-remappable) |
| Chân 26 | RC6 — Port C bit 6 (PPS-remappable, TX) |
| Chân 27 | RC7 — Port C bit 7 (PPS-remappable, RX) |
| Chân 28 | RD0 — Port D bit 0 (PPS-remappable) |
| Chân 29 | RD1 — Port D bit 1 (PPS-remappable) |
| Chân 30 | VSS — Ground reference |
| Chân 31 | VDD — Positive supply voltage |
| Chân 32 | RD2 — Port D bit 2 (PPS-remappable) |
| Chân 33 | RD3 — Port D bit 3 (PPS-remappable) |
| Chân 34 | RD4 — Port D bit 4 (PPS-remappable) |
| Chân 35 | RD5 — Port D bit 5 (PPS-remappable) |
| Chân 36 | RD6 — Port D bit 6 (PPS-remappable) |
| Chân 37 | RD7 — Port D bit 7 (PPS-remappable) |
| Chân 38 | VSS — Ground reference |
| Chân 39 | VDD — Positive supply voltage |
| Chân 40 | RE3 — Port E bit 3 |
| Chân EP | EP — Exposed thermal pad - connect to ground |
Ứng dụng tiêu biểu
PIC18F45Q43T-I/MP phù hợp cho 7 Áp dụngs: Industrial Sensor Node with Battery Power, Low-Power IoT Edge Device with Wireless Link, BLDC Motor and Lighting Control, USB-CDC Human Interface Device (HID), Consumer Appliance Control Board, Automotive Body and Lighting Module, Medical Monitoring Wearable.
Industrial Sensor Node with Battery Power
The PIC18F45Q43T-I/MP suits battery-powered industrial sensor nodes because of its 32 KB Flash and 1.8-5.5 V wide-supply operation, which covers both coin-cell and 3.6 V LiSOCl2 chemistries. Its eXtreme Low Power (XLP) sleep currents in the nanoamp range and event-driven Core Independent Peripherals let the device wake on a sensor threshold without CPU intervention, extending battery life to multi-year deployments. Six DMA channels move data between peripherals and memory without waking the core, and the 12-bit ADCC with oversampling enables high-precision temperature, pressure, or flow measurements from bridge sensors while keeping the CPU in Idle.
Được đề xuất
Low-Power IoT Edge Device with Wireless Link
The PIC18F45Q43T-I/MP pairs with sub-GHz or BLE modules as an edge controller that aggregates sensor data, runs lightweight filtering, and forwards packets via UART/SPI. Its 64 MHz core (16 MIPS) handles protocol stack offload while six PWM channels drive actuators; the 2 KB SRAM buffer accommodates bursty radio traffic, and 1 KB EEPROM stores configuration persistently across power cycles. The PPS system allows flexible SPI/I2C/UART pin mapping to the wireless module without remapping firmware, easing PCB layout.
Được đề xuất
BLDC Motor and Lighting Control
The three 16-bit dual-output PWMs (six channels total) on the PIC18F45Q43T-I/MP generate complementary drive signals for three-phase BLDC or brushless DC fan motor commutation. Combined with the on-chip comparators and 12-bit ADCC, the MCU implements sensorless back-EMF zero-cross detection and overcurrent protection in hardware, reducing firmware load. The 64 MHz core executes field-oriented control loops at 16 MIPS while PPS remaps PWM outputs to any GPIO, simplifying PCB layout for high-current half-bridges.
Được đề xuất
USB-CDC Human Interface Device (HID)
The PIC18F45Q43T-I/MP can implement USB-CDC virtual COM port devices using an external USB transceiver and on-chip UART, supporting 12 Mbps full-speed USB through PPS. The 32 KB Flash is sufficient for CDC class driver plus application logic, and the 2 KB SRAM buffers CDC packets without flow-control stalls. Designers benefit from Microchip's free USB framework for PIC18, validated against the device's interrupt priorities and PPS configuration.
Được đề xuất
Consumer Appliance Control Board
The PIC18F45Q43T-I/MP integrates the peripherals needed for white-goods control boards: PWMs for triac/SCR firing, ADC for temperature and line-voltage sensing, comparators for zero-cross detection, and EEPROM for last-state memory. Its 1.8-5.5 V supply works directly from rectified mains via a small LDO, and XLP nanoamp sleep modes enable standby power below 0.1 W to meet Energy Star and EU ecodesign regulations for household appliances.
Được đề xuất
Automotive Body and Lighting Module
Although PIC18F45Q43T-I/MP is rated -40C to +85C industrial grade, the same die family extends to AEC-Q100 qualified automotive variants (PIC18F46Q43-E/MP etc.), and design practices transfer directly. The 12-bit ADCC reads LIN/CAN bus levels, while six DMA channels offload bus traffic to RAM without CPU wake, ideal for body controllers managing interior lighting and door modules. The 40-pin QFN footprint survives automotive vibration when properly board-mounted with underbody epoxy.
Được đề xuất
Medical Monitoring Wearable
The PIC18F45Q43T-I/MP suits low-power medical wearables like pulse oximeters and continuous glucose monitor dongles because its XLP sleep currents in the nanoamp range enable weeks-long battery life. The 12-bit ADCC samples photodiode or bio-impedance signals at low duty cycle, and the 8-bit DAC drives bias currents for sensor front-ends. With 1 KB EEPROM storing calibration data, the device retains accuracy across device lifetimes, important for medical-grade measurements.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F45Q43T-I/MP — 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 | PIC18F45Q43-I/MP | PIC18F46Q43T-I/MP | PIC18F45Q10T-I/MP | PIC18F45K42T-I/ML |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-QFN (MP) 5x5 mm | 40-QFN (MP) 5x5 mm | 40-QFN (MP) 5x5 mm | 40-QFN (MP) 5x5 mm | 40-QFN (ML) 5x5 mm |
| Flash Memory | 32 KB | 32 KB | 64 KB | 32 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 4 KB | 2 KB | 2 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Maximum Clock | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| DMA Channels | 6 | 6 | 6 | 0 (no DMA) | 0 (no DMA) |
| Operating Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Bảo phân biệt quan trọng
- Six DMA channels for peripheral-to-memory offload (vsPIC18F45Q10T-I/MP)
- Event system enabling peripheral-to-peripheral signalling (vsPIC18F45K42T-I/ML)
- 12-bit ADCC with hardware oversampling and averaging (vsPIC18F45Q10T-I/MP)
- Vectored interrupts with fixed 3-cycle latency (vsPIC18F45Q43-I/P)
Ghi chú thiết kế
Decoupling: place a 0.1 uF X7R ceramic capacitor within 3 mm of every VDD pin and a single 1-10 uF bulk capacitor adjacent to the VDD/AVDD pair. The Q43 internal regulator responds to fast current transients when Core Independent Peripherals switch state; insufficient bulk capacitance causes brown-out resets under PWM or DMA load. For battery applications, add a 100 nF cap on the MCLR line to prevent spurious resets from voltage dips during sleep-wake transitions.
Layout: The 40-QFN exposed thermal pad (EP) must be soldered to a continuous ground copper pour, with thermal vias to inner ground planes for heat dissipation. Keep the ICSP clock/data traces short and away from PWM outputs and high-current switching nodes to avoid programming glitches. PPS routing requires that peripheral signals share the same I/O bank to avoid skew; group UART/SPI lines on adjacent pins to minimize latency.
Common pitfalls: (1) Configuring unused pins as analog inputs without disabling them causes additional current draw; always set unused pins to digital outputs low. (2) PPS lock on the PPSLOCK register must follow Microchip's unlock sequence or PPS writes silently fail. (3) The 12-bit ADCC requires its own voltage regulator settling time after wake-from-sleep; allow at least 5 us before triggering conversions. (4) EEPROM writes are not blocked by interrupts - guard writes with atomic sequences if the application uses ISRs that read the same locations.
Clock routing: If using an external crystal, place the load capacitors within 5 mm of the OSC1/OSC2 pins, keep traces short and symmetric, and guard them with a ground ring. The internal 64 MHz HFINTOSC is factory-trimmed to +/-2% and is recommended for low-EMI applications, eliminating the external crystal layout entirely. When switching from HFINTOSC to crystal, allow 1 ms startup before re-enabling peripherals to avoid frequency drift during boot.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. Standard industrial grade -40C to +85C; for AEC-Q100 automotive grade use PIC18F46Q43-E/MP or equivalent -E suffix parts.
