PIC18F47K42-I/PT - 8-Bit 64MHz 128KB Flash MCU | Microchip
MPN: PIC18F47K42-I/PT ✓ Hoạt độngPIC18F47K42-I/PT Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, and a configurable set of peripherals (ADC, timers, PWM, communication interfaces, I/O) on one die. Within the wider power-management and embedded hierarchy, an MCU sits above logic ICs and is the active control element that supervises sensors, actuators, displays, and communication buses. The PIC18 architecture used here is an 8-bit accumulator-based Harvard design with hardware multiply, extended instruction set, and 31-level stack.
Key features of the PIC18F47K42-I/PT include the XLP (eXtreme Low Power) family designation with nanoWatt XLP sleep currents, a 12-bit differential ADC2 with computation, a 5-bit/8-bit DAC, comparators, multiple UART/SPI/I2C interfaces, DMA, vector interrupts, and up to 36 I/O pins. The 44-pin TQFP-10x10 package is footprint-compatible with the other 40-pin and 48-pin members of the K42 family, enabling design reuse across product variants.
The device integrates Core Independent Peripherals (CIPs) that operate without CPU intervention - including signal measurement timers, PWM, CLC (Configurable Logic Cell), and the ADC2 with hardware oversampling. This offloads deterministic tasks from the core, lowering active-mode duty cycle and enabling lower average power than traditional 8-bit MCUs running software loops.
Typical applications include consumer appliances, HVAC control, motor control (BLDC fans, small pumps), LED lighting controllers, USB/HID interfaces, smart sensors, battery-powered IoT edge nodes, and general-purpose industrial control. The K42 family is widely used where a 5V-tolerant 8-bit MCU with strong analog and DMA replaces discrete analog front-ends.
When designing with this part, plan the 44-pin TQFP-10x10 PCB land pattern early; ensure VDD/VSS decoupling is placed within 2 mm of each pair, leave room for ICD programming header, and pick the right I-grade (industrial -40 to +85 C) vs E-grade (extended -40 to +125 C) for the thermal environment.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC18F47K42-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 PIC18F47K42-I/PT (cùng hình factor và footprint) — khác nhau ở Package, DAC, Operating Temperature, Comparators, ADC.
PIC18F47K42-E/PT
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Xem tài liệu →PIC18F47K42-I/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC18 8-bit |
| Family | PIC18FxxK42 (XLP eXtreme Low Power) |
| CPU Clock Speed | 64 MHz max |
| Flash Program Memory | 128 KB (64K x 16 words) |
| SRAM Data Memory | 8 KB |
| EEPROM | 1 KB |
| Operating Voltage (VDD) | 2.3 V to 5.5 V |
| Hộp | 44-pin TQFP (PT) 10 x 10 x 1 mm |
| Kiểu lắp đặt | Surface Mount |
| Temperature Grade | Industrial -40 C to +85 C (I grade) |
| ADC | 12-bit ADC2 with computation, differential, oversampling |
| DAC | 5-bit / 8-bit DAC |
| Comparators | On-chip comparators |
| Communication Interfaces | UART, SPI, I2C (multiple instances) |
| DMA | Yes |
| PWM Channels | Multiple with Core Independent Peripherals (CIP) |
| Instruction Set | PIC18 extended instruction set, hardware 8x8 multiplier |
| Programming/Debug | ICSP, ICD |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18F47K42-I/PT
| Chân 1 | RA0 — Digital I/O / analog input |
| Chân 2 | RA1 — Digital I/O / analog input |
| Chân 3 | RA2 — Digital I/O / analog input |
| Chân 4 | RA3 — Digital I/O / analog input |
| Chân 5 | RA4 — Digital I/O / analog input |
| Chân 6 | RA5 — Digital I/O / analog input |
| Chân 7 | RA6 — Digital I/O / analog input |
| Chân 8 | RA7 — Digital I/O / analog input |
| Chân 9 | VSS — Ground |
| Chân 10 | VDD — Positive supply (2.3 V to 5.5 V) |
| Chân 11 | RB0 — Digital I/O / interrupt-on-change |
| Chân 12 | RB1 — Digital I/O / interrupt-on-change |
| Chân 13 | RB2 — Digital I/O / interrupt-on-change |
| Chân 14 | RB3 — Digital I/O / interrupt-on-change |
| Chân 15 | RB4 — Digital I/O / interrupt-on-change |
| Chân 16 | RB5 — Digital I/O / interrupt-on-change |
| Chân 17 | RB6 — Digital I/O / ICD PGC |
| Chân 18 | RB7 — Digital I/O / ICD PGD |
| Chân 19 | VSS — Ground |
| Chân 20 | VDD — Positive supply (2.3 V to 5.5 V) |
| Chân 21 | RC0 — Digital I/O |
| Chân 22 | RC1 — Digital I/O |
| Chân 23 | RC2 — Digital I/O |
| Chân 24 | RC3 — Digital I/O |
| Chân 25 | RC4 — Digital I/O |
| Chân 26 | RC5 — Digital I/O |
| Chân 27 | RC6 — Digital I/O |
| Chân 28 | RC7 — Digital I/O |
| Chân 29 | VSS — Ground |
| Chân 30 | VDD — Positive supply (2.3 V to 5.5 V) |
| Chân 31 | RD0 — Digital I/O |
| Chân 32 | RD1 — Digital I/O |
| Chân 33 | RD2 — Digital I/O |
| Chân 34 | RD3 — Digital I/O |
| Chân 35 | RD4 — Digital I/O |
| Chân 36 | RD5 — Digital I/O |
| Chân 37 | RD6 — Digital I/O |
| Chân 38 | RD7 — Digital I/O |
| Chân 39 | VSS — Ground |
| Chân 40 | VDD — Positive supply (2.3 V to 5.5 V) |
| Chân 41 | RE0 — Digital I/O |
| Chân 42 | RE1 — Digital I/O |
| Chân 43 | RE2 — Digital I/O |
| Chân 44 | RE3 — Digital I/O (also MCLR/ICSP programming) |
Ứng dụng tiêu biểu
PIC18F47K42-I/PT phù hợp cho 6 Áp dụngs: Consumer Appliance Control, BLDC Fan and Small Pump Motor Control, LED Lighting Controller, Battery-Powered IoT Edge Sensor, HVAC and Building Control, USB HID / Human Interface Device.
Consumer Appliance Control
The PIC18F47K42-I/PT fits consumer appliance control boards because its 128 KB Flash absorbs the full state-machine plus UI logic, while 8 KB RAM is enough for menu structures, sensor histories, and BLE/HID command buffers. The 64 MHz core runs the main control loop in microseconds, leaving headroom for ADC2 averaging on NTC temperature sensors, zero-cross triac dimming PWMs, and UART comms to a UI board. Its 2.3-5.5 V VDD range means a 5 V-off-line dropper powers the part directly with no level shifter.
Được đề xuất
BLDC Fan and Small Pump Motor Control
The PIC18F47K42-I/PT's Core Independent Peripherals (PWM, CLC, signal-measurement timer) generate the 6-step commutation table for BLDC motors without CPU load, while DMA streams ADC2 back-EMF samples into RAM without waking the core. At 64 MHz the core still has cycles to manage speed PI loop and host comms. Designers often pair it with gate drivers like the MCP8025/6 and use the on-chip comparators for BEMF zero-cross detection - eliminating external op-amps.
Được đề xuất
LED Lighting Controller
LED lighting drivers use the PIC18F47K42-I/PT to combine analog dim (0-10 V) and DALI/Casambi digital control in one IC. The 12-bit ADC2 reads the dim input with 0.025% resolution; the high-resolution PWM outputs drive a buck-constant-current stage; the on-chip 5-bit DAC generates a reference for the current loop. XLP sleep modes drop quiescent to nanoAmp range when the lamp is off, satisfying the EU Ecodesign standby requirement.
Được đề xuất
Battery-Powered IoT Edge Sensor
Battery-powered IoT edge nodes use the PIC18F47K42-I/PT's nanoWatt XLP sleep mode (sub-microamp quiescent) plus 12-bit ADC2 with computation to wake, sample a sensor, decide, and re-sleep. DMA moves ADC results into RAM without core wake-up, so a coin-cell sensor can run for years. The 128 KB Flash supports secure boot, OTA hooks, and rich application logic without external memory; UART or I2C connects to a sub-GHz or BLE module.
Được đề xuất
HVAC and Building Control
HVAC thermostats and zone controllers need industrial-temperature-grade analog plus communication. The PIC18F47K42-I/PT (industrial -40 to +85 C) or its E-grade variant handles 24 VAC-powered thermostats; ADC2 reads thermistor bridges, on-chip comparators detect line-frequency zero-cross for TRIAC timing, and UART/SPI bridge to a Modbus or BACnet network. The 44-pin TQFP is footprint-compatible with the smaller K40/K22 family, easing PCB reuse across SKUs.
Được đề xuất
USB HID / Human Interface Device
USB keyboards, custom HID controllers, and small touch interfaces use the PIC18F47K42-I/PT for its 128 KB Flash (USB stack + scan logic), DMA-driven USB endpoint buffers, and enough I/O to scan a 12x8 matrix directly. The internal HFINTOSC is accurate enough for USB full-speed without an external crystal, reducing BOM cost and PCB area. ICD-friendly 44-pin TQFP simplifies bring-up.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F47K42-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 | PIC18F47K42-E/PT | PIC18F45K42-I/PT | PIC18F46K42-I/PT | PIC18F46K42T-I/ML |
|---|---|---|---|---|---|
| Package | 44-pin TQFP (PT) 10x10 mm | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same | 44-pin QFN (ML) - smaller, same 44-pin count |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 128 KB | 128 KB | 64 KB (-50%) | 64 KB (-50%) | 64 KB (-50%) |
| SRAM | 8 KB | 8 KB | 4 KB (-50%) | 4 KB (-50%) | 4 KB (-50%) |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| CPU Clock Speed | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Operating Voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V |
| Temperature Grade | Industrial -40C to +85C | Extended -40C to +125C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C |
| XLP Low-Power Sleep | Yes (nanoWatt XLP) | Yes | Yes | Yes | Yes |
Bảo phân biệt quan trọng
- Largest Flash memory in K42 family (vsPIC18F46K42-I/PT)
- Broader temperature range option in same die (vsPIC18F47K42-I/PT (industrial) vs PIC18F47K42-E/PT (extended))
- XLP nanoWatt technology vs legacy PIC18F46K80 (vsPIC18F46K80-I/PT)
Ghi chú thiết kế
Place a 100 nF decoupling capacitor within 2 mm of each VDD/VSS pair (there are 4 pairs on the 44-pin TQFP). Add a bulk 10 uF tantalum or ceramic at the board VDD entry. For VDD ramps slower than 50 ms, configure the Brown-Out Reset (BOR) to the appropriate VDD threshold to prevent undefined operation during power transitions.
Route the ICSP pins RB6 (PGC) and RB7 (PGD) directly to a 6-pin ICSP header with series 4.7 kohm pull-ups on each signal. Keep the ICD header within 25 mm of the MCU to avoid signal integrity issues. Separate the analog (RA) pins from switching PWM lines (PWM outputs on RC/RD) with a ground trace to reduce ADC2 noise pickup.
PIC18F47K42-I/PT I-grade parts are rated -40C to +85C; for outdoor or industrial applications that exceed +85C (e.g. motor enclosures, outdoor lighting, automotive under-hood), choose the E-grade PIC18F47K42-E/PT variant. Do not mistake the I and E suffixes - the same 44-pin TQFP package is used but the silicon is qualified differently.
When using the on-chip 12-bit ADC2 for precision measurements (e.g. battery monitoring on a coin-cell sensor), enable the ADC2 hardware averaging and oversampling features to reduce input-referred noise to ~100 uVrms. Use a buffer op-amp (e.g. MCP6001) for high-impedance sensor sources so the ADC's sample-and-hold capacitor charges correctly.
Thông tin tuân thủ
Microchip PIC18F47K42-I/PT is RoHS compliant per distributor datasheets. AEC-Q100 automotive grade is on the PIC18F47K42-EP family variant, not the I-grade. No halogen-free statement in available data.
