PIC18F45Q43-I/MP - 8-bit 64MHz 32KB Flash XLP MCU | Microchip
MPN: PIC18F45Q43-I/MP ✓ Hoạt độngPIC18F45Q43-I/MP Tóm tắt
An 8-bit microcontroller is a CPU that processes data 8 bits per cycle and is widely used in real-time embedded applications where deterministic latency, low power, and rich on-chip peripherals matter more than raw compute throughput. Within the broader taxonomy, PIC microcontrollers occupy the 8-bit MCU segment, and the PIC18F family represents Microchip's enhanced mid-range core featuring a hardware multiplier, C-compiler-friendly architecture, and linear memory addressing. The Q43 sub-family is positioned for analog-rich, hardware-customizable designs and supersedes earlier Q10/K42 generation devices.
Key features include a 12-bit ADCC supporting Capacitive Voltage Divider (CVD) for touch sensing, configurable logic cells (CLC) for custom digital glue logic, three independent 16-bit PWMs each offering dual outputs on the same time base, and XLP (eXtreme Low Power) technology delivering sub-microamp sleep currents. The device also integrates an 8-bit DAC, multiple UART/SPI/I2C instances, a 32KB self-programmable Flash and a unique Peripheral Pin Select (PPS) routing matrix for flexible signal mapping.
Architecturally, the PIC18F45Q43 uses a modified Harvard bus with a 16-bit instruction word and 8-bit data path, achieving approximately 16 MIPS at 64MHz. The CIP block approach lets analog, timing, and communication tasks run in hardware without CPU intervention, offloading the core in real-time control loops and reducing firmware complexity.
Typical applications include capacitive touch user interfaces, BLDC and DC motor/fan control, LED lighting drivers, IoT sensor nodes, and industrial control subsystems. The wide operating voltage and rich peripheral set make it well suited for 24V industrial bus systems running from simple linear regulators.
When designing with this MCU, always configure PPS before enabling peripherals, keep traces short for the high-speed 16-bit PWM outputs, and stitch adequate ground copper under the QFN thermal pad. Industrial designs must observe the -40C to +85C industrial temperature grade.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes that complement - not duplicate - the manufacturer datasheet, helping engineers select and qualify the PIC18F45Q43-I/MP for production.
Bộ thay thế dễ dàng lắp đặt cho PIC18F45Q43-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 PIC18F45Q43-I/MP (cùng hình factor và footprint) — khác nhau ở ADC, DAC, Package.
PIC18F46Q43-I/MP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F45Q43-E/MP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F45Q43-I/MP Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC18 Enhanced Mid-Range (8-bit data, 16-bit instruction) |
| Family | PIC18F Q43 (XLP) |
| Program Memory (Flash) | 32 KB |
| SRAM | 2 KB |
| EEPROM | 1 KB |
| Maximum CPU Frequency | 64 MHz (16 MIPS) |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| ADC | 12-bit ADC with Computation (ADCC), Capacitive Voltage Divider (CVD) |
| DAC | 8-bit DAC |
| PWM | 3 x 16-bit PWM (six PWM outputs, dual outputs per time base) |
| DMA | 6 channels |
| Comparators | Yes |
| CLC (Configurable Logic Cells) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| ZCD / CWG / WWDT / SCAN-CRC / HLT | Yes |
| Communication | UART, SPI, I2C (multiple instances) |
| Hộp | 40-pin QFN (5x5 mm, MP code, HVQCCN, exposed pad) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| XLP Sleep Current | Sub-microamp (per XLP family spec) |
Cấu hình chân PIC18F45Q43-I/MP
| Chân 1 | I/O/RA0 — PORTA bit 0, analog-capable, CCP/PWM remappable |
| Chân 2 | I/O/RA1 — PORTA bit 1, analog-capable |
| Chân 3 | I/O/RA2 — PORTA bit 2, analog-capable |
| Chân 4 | I/O/RA3 — PORTA bit 3, analog-capable |
| Chân 5 | I/O/RA4 — PORTA bit 4 |
| Chân 6 | I/O/RA5 — PORTA bit 5 |
| Chân 7 | I/O/RA6 — PORTA bit 6 |
| Chân 8 | I/O/RA7 — PORTA bit 7 |
| Chân 9 | VSS — Ground |
| Chân 10 | VDD — Positive supply, 1.8V to 5.5V |
| Chân 11 | I/O/RB0 — PORTB bit 0, INT capable |
| Chân 12 | I/O/RB1 — PORTB bit 1 |
| Chân 13 | I/O/RB2 — PORTB bit 2 |
| Chân 14 | I/O/RB3 — PORTB bit 3 |
| Chân 15 | I/O/RB4 — PORTB bit 4 |
| Chân 16 | I/O/RB5 — PORTB bit 5 |
| Chân 17 | I/O/RB6 — PORTB bit 6, ICSCLK |
| Chân 18 | I/O/RB7 — PORTB bit 7, ICSDAT |
| Chân 19 | VSS — Ground |
| Chân 20 | VDD — Positive supply |
| Chân 21 | I/O/RC0 — PORTC bit 0 |
| Chân 22 | I/O/RC1 — PORTC bit 1 |
| Chân 23 | I/O/RC2 — PORTC bit 2 |
| Chân 24 | I/O/RC3 — PORTC bit 3, SCL optional |
| Chân 25 | I/O/RC4 — PORTC bit 4, SDA optional |
| Chân 26 | I/O/RC5 — PORTC bit 5 |
| Chân 27 | I/O/RC6 — PORTC bit 6, TX |
| Chân 28 | I/O/RC7 — PORTC bit 7, RX |
| Chân 29 | I/O/RE3 — PORTE bit 3, digital only |
| Chân 30 | I/O/RD0 — PORTD bit 0 |
| Chân 31 | I/O/RD1 — PORTD bit 1 |
| Chân 32 | I/O/RD2 — PORTD bit 2 |
| Chân 33 | I/O/RD3 — PORTD bit 3 |
| Chân 34 | I/O/RD4 — PORTD bit 4 |
| Chân 35 | I/O/RD5 — PORTD bit 5 |
| Chân 36 | I/O/RD6 — PORTD bit 6 |
| Chân 37 | I/O/RD7 — PORTD bit 7 |
| Chân 38 | VSS — Ground |
| Chân 39 | VDD — Positive supply |
| Chân 40 | EP — Exposed thermal pad (must be soldered to VSS copper pour for heat dissipation) |
Ứng dụng tiêu biểu
PIC18F45Q43-I/MP phù hợp cho 6 Áp dụngs: Capacitive Touch User Interface, BLDC Motor / Fan Control, Industrial Sensor / 24V Bus Module, LED Lighting Drivers, Battery-Powered IoT Sensor Node, Functional Safety / Safe-Output Industrial I/O.
Capacitive Touch User Interface
The PIC18F45Q43-I/MP is well matched to capacitive touch user interfaces because the integrated 12-bit ADCC with Computation natively executes CVD techniques for button, slider and proximity sensing. Hardware oversampling, accumulation, and threshold comparison are offloaded from the CPU, leaving the 16 MIPS core free for display refresh, debouncing, and communication tasks. In a typical 8-key touch keyboard the mTouch CVD framework runs on the ADCC with zero firmware DSP, and the three 16-bit PWMs can drive LED backlight brightness simultaneously. Compared to discrete touch ICs, this single-chip solution reduces BOM cost and PCB area while maintaining low power via XLP sleep.
Được đề xuất
BLDC Motor / Fan Control
The PIC18F45Q43-I/MP's three independent 16-bit PWMs with dual outputs per time base provide all six PWM channels needed for six-step BLDC commutation or sinusoidal field-oriented control. Hardware fault inputs, dead-band generation, and the configurable CLC cells handle the protection and signal glue of an inverter stage without CPU load. The 12-bit ADCC samples motor currents at the PWM center point with deterministic timing, while the six DMA channels move conversion results to memory and the CWG drives complementary outputs with programmable dead time. Compared with 8-bit MCUs that lack 16-bit PWMs, the Q43 reduces firmware complexity for sensorless or Hall-sensored BLDC drivers, fan controllers, and small pump control designs.
Được đề xuất
Industrial Sensor / 24V Bus Module
Industrial sensor and 24V-bus digital input modules benefit from the PIC18F45Q43-I/MP's 1.8V to 5.5V supply range and rich analog peripherals. The wide supply eliminates the need for two regulators on a 5V/3.3V split rail design, and the 12-bit ADCC with up to 35 channels on this 40-pin QFN derivate is sufficient for multi-channel current/voltage sensing. Hardware CIPs - DMA, CLC, ZCD, CWG - let a single MCU debounce optocoupler inputs, generate zero-crossing timing, and drive RS-485/SPI/I2C peripherals deterministically. Operating at -40C to +85C, this part is qualified for industrial temperature ranges found in factory automation.
Được đề xuất
LED Lighting Drivers
PIC18F45Q43-I/MP excels in intelligent LED lighting drivers by combining three 16-bit PWMs (six outputs) with hardware DMA and CLC, enabling multi-channel color-mixing and analog dimming without firmware burden. Each PWM time base supports center-aligned modulation with dead-band insertion for backlight or RGBW strings at high dimming ratios up to 16-bit resolution. The XLP sub-microamp sleep current and fast wake-up from the CLC-equipped peripheral matrix mean the MCU can enter standby between brightness updates for total power reduction. Compared with simple 8-bit timers, the Q43 PWMs avoid dimming flicker at low duty cycles thanks to 16-bit timing precision.
Được đề xuất
Battery-Powered IoT Sensor Node
The PIC18F45Q43-I/MP is an excellent choice for battery-powered IoT sensor nodes thanks to its XLP (eXtreme Low Power) technology offering sub-microamp sleep current and microamp-level active current at low FOSC. The integrated 12-bit ADCC with hardware oversampling lowers the number of active CPU wake-ups needed for accurate sensor reads, and six DMA channels shuffle conversion results without waking the core. The 1.8V to 5.5V range covers single-cell Li-ion, two-cell AA, and 3V coin-cell chemistries, while the -40C to +85C industrial range fits outdoor IoT deployments. Compared with ARM Cortex-M0+ alternatives, this 8-bit PIC parts offer deterministic behavior and simple firmware in compact 40-QFN packages.
Được đề xuất
Functional Safety / Safe-Output Industrial I/O
The PIC18F45Q43-I/MP, paired with its functional-safety variant designations, is well suited to safety-input/output modules that require fault detection on each channel. Hardware CRC/SCAN over memory, windowed WWDT, hardware fault zoning via CLC, and analog ZCD provide the diagnostic primitives required in IEC 61508 SIL-2-capable designs. The PWMs with fault inputs can be hardware-killed in microseconds without firmware cooperation, and the DDS-driven DMA continually moves I/O states to memory for voter logic. Compared with a discrete watchdog + relay scheme, this single-chip implementation reduces cost while providing deterministic safety response in machinery control cabinets.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F45Q43-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/PT | PIC18F46Q43-I/MP | PIC18F45Q43-E/MP | PIC18F25Q43-I/STX | PIC18F27Q10-I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash | 32 KB | 32 KB | 64 KB | 32 KB | 32 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 4 KB | 2 KB | 2 KB | 2 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Max CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Supply 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 | 1.8 V to 5.5 V |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Extended -40C to +125C | Industrial -40C to +85C | Industrial -40C to +85C |
| Pin Count | 40 | 44 | 40 | 40 | 28 | 28 |
Bảo phân biệt quan trọng
- Newest Q43 CIP architecture with ADCC, CLC, 16-bit PWM (vsPIC18F27Q10-I/SS)
- Same QFN-40 footprint with extended temperature range (vsPIC18F45Q43-E/MP)
- Doubles memory when more headroom is needed (vsPIC18F46Q43-I/MP)
- TQFP for hand-prototype, QFN for production (vsPIC18F45Q43-I/PT)
Ghi chú thiết kế
The 40-pin QFN (5x5 mm, MP) package exposes a large central thermal pad. Always solder this pad to a continuous VSS copper pour stitched with thermal vias (8-16 vias, 0.3 mm drill) to keep junction temperatures within the industrial -40C to +85C range, especially when running at 64 MHz. Keep high-frequency PWM and CCP traces over an unbroken reference plane to reduce ground bounce.
Peripheral Pin Select (PPS) mappings on the PIC18F45Q43-I/MP must be configured in firmware before any peripheral is enabled. Calling PPSUnLock + PPS assignment + PPSLock sequence is required, otherwise peripherals remain mapped to their default pins regardless of firmware intent. A common pitfall is initiating UART/SPI before PPS, resulting in no-bus activity that masquerades as a hardware fault.
Place the 0.1 uF and 1 uF ceramic decoupling capacitors as close as possible to each VDD/VSS pair on the 40-pin QFN. Use wide, short traces - or ideally multiple vias - to keep the inductance under 1 nH. CVD touch measurements are sensitive to high-frequency digital noise on the analog lines; route ADCC inputs away from PWM outputs and add a small RC filter on heavily-switched analog nodes.
XLP mode on the PIC18F45Q43-I/MP delivers sub-microamp sleep current, but you must disable the ADC, PWM, and CLC modules before entering sleep to achieve it. Use the dedicated System Sleep macro in MPLAB XC8 to ensure the proper register sequence; manually gating individual CIPs leaves leakage paths that raise quiescent draw by orders of magnitude.
When routing the three 16-bit PWM outputs to a power stage, keep traces matched within 100 mil to prevent skew between complementary outputs and to keep dead-band timing accurate. Place a 33 ohm series resistor close to the MCU pin to dampen reflections on long traces; avoid running PWM traces parallel to I2C/SPI lines to limit crosstalk.
Thông tin tuân thủ
Industrial grade; not AEC-Q100 qualified. For automotive, choose PIC18F45Q43-E/MP (extended temperature) - not AEC-Q100 explicit qualification.
