PIC18F55K42-E/PT - 32KB Flash 8-bit MCU 48-TQFP | Microchip
MPN: PIC18F55K42-E/PT ✓ Hoạt độngPIC18F55K42-E/PT Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (Flash/RAM/EEPROM), peripherals, and I/O on one die. The PIC18FxxK42 family sits within the 8-bit PIC18 hierarchy under Microchip's broader MCU portfolio, targeting cost-sensitive embedded designs where deterministic real-time behavior, low power, and rich analog integration matter more than raw computational throughput. Designers select 8-bit PICs when they need reliable behavior in noisy environments with minimal external components.
Key specifications include a 12-bit ADC with Computation (ADC2), a 5-bit DAC, two comparators with selectable references, multiple PWM modules with complementary outputs, DMA controller, Memory Access Partition (MAP) for bootloader write protection, Device Information Area (DIA), vectored interrupts with programmable priority, and a programmable Interrupt Vector Table. The 48-TQFP-EP package exposes a thermal pad enabling higher dissipation in industrial temperature grades.
The architecture features the enhanced mid-range 8-bit CPU executing most instructions in a single cycle, yielding up to 16 MIPS at 64 MHz. Hardware DMA moves data between memory and peripherals without CPU intervention, freeing the core for application logic. CIPs such as the CWG, NCO, and configurable logic cells let signal generation, timing, and glue logic run autonomously.
Typical applications include industrial sensing nodes, motor control with FOC, IoT edge sensor hubs, consumer white goods, smart metering, and automotive body controllers. The combination of vectored interrupts and CIPs makes the part well suited to deterministic control loops. The 32 KB Flash and 256-byte EEPROM suit moderate code sizes with runtime-tunable parameters.
When designing with the PIC18F55K42-E/PT, place decoupling capacitors close to every VDD/VSS pair, route the exposed pad to a continuous ground copper pour for thermal relief, and reserve the MAP region early in firmware planning if a bootloader is required.
This page synthesizes distributor pricing, cross-family alternatives within the PIC18 K42/Q43 generations, and practical design notes not consolidated in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC18F55K42-E/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 PIC18F55K42-E/PT (cùng hình factor và footprint) — khác nhau ở Package, Program Memory (Flash), DAC, ADC, EEPROM.
PIC18F55K42-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18F56K42-E/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18F57K42-E/PT
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F47Q43-E/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F47K42-E/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F55K42-E/PT Tỷ lệ tối đa & tính chất điện
| Core | PIC 8-bit enhanced mid-range |
| Family | PIC18FxxK42 (XLP) |
| Program Memory (Flash) | 32 KB (16K x 16 words) |
| SRAM | 2 KB |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 64 MHz |
| Operating Voltage (VDD) | 2.3 V to 5.5 V |
| ADC | 12-bit ADC2 with Computation |
| DAC | 5-bit DAC |
| Comparators | 2 with selectable references |
| PWM Channels | Multiple with complementary outputs (peripheral count in datasheet) |
| DMA | Yes (Cycle-Stealing / Copy modes) |
| Memory Access Partition (MAP) | Yes, with bootloader write protection |
| Device Information Area (DIA) | Yes |
| Vector Interrupts | Yes, programmable single/dual priority |
| Temperature Range | -40C to +125C (E suffix, extended industrial) |
| Hộp | 48-pin TQFP-EP (7x7 mm) with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân PIC18F55K42-E/PT
| Chân 1 | RA0 — Analog/Digital I/O |
| Chân 2 | RA1 — Analog/Digital I/O |
| Chân 3 | RA2 — Analog/Digital I/O |
| Chân 4 | RA3 — Analog/Digital I/O |
| Chân 5 | RA4 — Analog/Digital I/O |
| Chân 6 | RA5 — Analog/Digital I/O |
| Chân 7 | RA6 — Analog/Digital I/O |
| Chân 8 | RA7 — Analog/Digital I/O |
| Chân 9 | VDD — Positive supply voltage |
| Chân 10 | VSS — Ground reference |
| Chân 11 | RB0 — Digital I/O with interrupt-on-change |
| Chân 12 | RB1 — Digital I/O with interrupt-on-change |
| Chân 13 | RB2 — Digital I/O with interrupt-on-change |
| Chân 14 | RB3 — Digital I/O with interrupt-on-change |
| Chân 15 | RB4 — Digital I/O with interrupt-on-change |
| Chân 16 | RB5 — Digital I/O with interrupt-on-change |
| Chân 17 | RB6 — Digital I/O with interrupt-on-change / ICD |
| Chân 18 | RB7 — Digital I/O with interrupt-on-change / ICD |
| Chân 19 | RC0 — Digital I/O |
| Chân 20 | RC1 — Digital I/O |
| Chân 21 | RC2 — Digital I/O |
| Chân 22 | RC3 — Digital I/O |
| Chân 23 | RC4 — Digital I/O |
| Chân 24 | RC5 — Digital I/O |
| Chân 25 | RC6 — Digital I/O / UART TX |
| Chân 26 | RC7 — Digital I/O / UART RX |
| Chân 27 | VDD — Positive supply voltage |
| Chân 28 | VSS — Ground reference |
| Chân 29 | RD0 — Digital I/O |
| Chân 30 | RD1 — Digital I/O |
| Chân 31 | RD2 — Digital I/O |
| Chân 32 | RD3 — Digital I/O |
| Chân 33 | RD4 — Digital I/O |
| Chân 34 | RD5 — Digital I/O |
| Chân 35 | RD6 — Digital I/O |
| Chân 36 | RD7 — Digital I/O |
| Chân 37 | RE0 — Digital I/O |
| Chân 38 | RE1 — Digital I/O |
| Chân 39 | RE2 — Digital I/O |
| Chân 40 | RE3 — Digital I/O |
| Chân 41 | RF0 — Analog/Digital I/O |
| Chân 42 | RF1 — Analog/Digital I/O |
| Chân 43 | RF2 — Analog/Digital I/O |
| Chân 44 | RF3 — Analog/Digital I/O |
| Chân 45 | RF4 — Analog/Digital I/O |
| Chân 46 | RF5 — Analog/Digital I/O |
| Chân 47 | RF6 — Analog/Digital I/O |
| Chân 48 | RF7 — Analog/Digital I/O / MCLR |
Ứng dụng tiêu biểu
PIC18F55K42-E/PT phù hợp cho 6 Áp dụngs: Industrial Sensor Hub with Edge Filtering, BLDC Motor Control with FOC Algorithm, Smart Metering and Utility Monitoring, Consumer White Goods Control Board, IoT Edge Sensor Node with Local Processing, Automotive Body Control Module.
Industrial Sensor Hub with Edge Filtering
The PIC18F55K42-E/PT fits industrial sensor hubs because its 12-bit ADC2 with Computation performs hardware averaging and threshold detection without CPU load, freeing the 16 MIPS core to handle Modbus RTU or IO-Link protocols. With 32 KB Flash and 256-byte EEPROM, calibration constants and node addresses persist through power cycles. The vectored interrupt controller with programmable priority guarantees deterministic response times under heavy UART traffic. The 2.3-5.5 V VDD range simplifies direct connection to 24V-sensor buses via LDO regulators.
Được đề xuất
BLDC Motor Control with FOC Algorithm
The PIC18F55K42-E/PT supports sensorless or sensored BLDC motor control because its PWM modules deliver complementary outputs with programmable dead-band, while the 12-bit ADC2 samples back-EMF in sync with the PWM period for field-oriented control. The hardware DMA moves ADC samples into RAM without CPU intervention, leaving headroom for the FOC math at 16 MIPS. Core Independent Peripherals such as CWG and NCO generate commutation events autonomously. The -40C to +125C temperature grade handles underhood automotive and industrial cabinet environments.
Được đề xuất
Smart Metering and Utility Monitoring
The PIC18F55K42-E/PT suits smart electricity, water, and gas meters because its low-power XLP modes (nanoWatt XLP) draw microamp-level sleep currents between metrology events, extending battery life over multi-year deployments. The 12-bit ADC2 with 200 ksps throughput captures load profile data at sufficient resolution for billing-grade accuracy, while the 256-byte EEPROM stores tamper logs and calibration. The DMA moves ADC samples to RAM without waking the CPU, and the vectored interrupt controller prioritizes metering events over background communications.
Được đề xuất
Consumer White Goods Control Board
The PIC18F55K42-E/PT controls washing machines, dishwashers, and ovens because its PWM outputs drive triac-based heater elements with zero-cross detection, while the comparators monitor thermistor inputs for safety cutoffs. The MAP feature allows field firmware updates with bootloader write protection, critical for warranty service on deployed appliances. The 32 KB Flash accommodates UI state machines plus motor control code, and the integrated 5-bit DAC adjusts reference voltages for sensor conditioning.
Được đề xuất
IoT Edge Sensor Node with Local Processing
The PIC18F55K42-E/PT is ideal for battery-powered IoT sensor nodes that perform local signal processing before transmitting, leveraging the 12-bit ADC2 with hardware threshold interrupts to wake the CPU only when anomalies occur. The XLP sleep mode with DMA ensures minimal quiescent current, while the 32 KB Flash hosts sensor-fusion algorithms and a lightweight protocol stack (MQTT-SN or LoRaWAN). The vectored interrupt controller handles multiple wake sources from GPIO, ADC, comparator, and timers without polling.
Được đề xuất
Automotive Body Control Module
The PIC18F55K42-E/PT fits non-safety automotive body controllers such as lighting, seat, mirror, and HVAC modules because the -40C to +125C extended industrial grade survives underhood and cabin thermal stress. The PWM modules drive LED strings and motor loads with fade curves, while the comparators detect over-current conditions. The CAN peripheral (ECCP variants) and LIN/UART support body-electronics protocols. The 256-byte EEPROM stores trim and configuration that must survive battery disconnect events.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F55K42-E/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 | PIC18F55K42-I/PT | PIC18F56K42-E/PT | PIC18F57K42-E/PT | PIC18F47Q43-E/PT | PIC18F47K42-E/PT |
|---|---|---|---|---|---|---|
| Package | 48-TQFP-EP (7x7 mm) | 48-TQFP-EP (7x7 mm) - same | 48-TQFP-EP (7x7 mm) - same | 48-TQFP-EP (7x7 mm) - same | 48-TQFP-EP (7x7 mm) - same | 48-TQFP-EP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 32 KB | 32 KB | 64 KB | 128 KB | 128 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 4 KB | 8 KB | 8 KB | 2 KB |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Max CPU Speed | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Temperature Range | -40C to +125C (E) | -40C to +85C (I) | -40C to +125C (E) | -40C to +125C (E) | -40C to +125C (E) | -40C to +125C (E) |
| Pin Count | 48 | 48 | 48 | 48 | 48 | 40 |
Bảo phân biệt quan trọng
- Extended industrial -40C to +125C temperature grade in TQFP-EP (vsPIC18F55K42-I/PT)
- 64 KB Flash headroom for firmware growth (vsPIC18F55K42-I/PT (32 KB Flash))
- K42 family DMA + MAP + DIA integration at low price (vsPIC18F47Q43-E/PT)
Ghi chú thiết kế
Solder the exposed thermal pad of the 48-pin TQFP-EP package to a continuous ground copper pour of at least 1 square inch to provide thermal relief. The pad also reduces ground impedance for digital switching currents, improving EMI performance. Inadequate thermal connection can lead to junction temperature rise under sustained ADC and PWM activity at 64 MHz.
Place a 0.1 uF decoupling capacitor within 5 mm of every VDD/VSS pair on the PIC18F55K42-E/PT, plus a single 10 uF bulk capacitor near the supply pin. The K42 family has multiple VDD pins; ensure each is properly bypassed. NanoWatt XLP sleep currents depend on stable VDD, so decoupling quality directly impacts low-power sleep behavior.
The PIC18F55K42-E/PT (E suffix) operates -40C to +125C, but the I-suffix variant PIC18F55K42-I/PT is limited to -40C to +85C. Do not substitute I for E in automotive underhood designs. Additionally, the MCLR pin (RF7) must be tied to VDD through a 10 kohm resistor for normal operation; leaving it floating prevents startup.
Route the ICSP/ICD pins (RB6/RB7) to a dedicated 6-pin header for in-circuit programming and debugging, isolating them from analog signal traces. The K42 family uses these pins for both GPIO and programming, so careful routing avoids the need for jumpers. Keep trace lengths under 50 mm to maintain signal integrity during high-speed programming.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Extended industrial -40C to +125C temperature grade (E suffix) but not AEC-Q100 qualified; not intended for automotive safety-critical applications.
