PIC18F26K42-E/SO - 64KB Flash 8-bit XLP MCU 28-SOIC | Microchip
MPN: PIC18F26K42-E/SO ✓ Hoạt độngPIC18F26K42-E/SO Tóm tắt
An 8-bit microcontroller (MCU) is a small computer-on-a-chip built around an 8-bit data bus and Harvard architecture. PIC18F-series parts sit in Microchip's mid-range 8-bit portfolio, hierarchically classified as MCU -> 8-bit MCU -> PIC18 -> PIC18FxxK42 family. They typically serve low-power, mixed-signal embedded roles where deterministic behavior, long battery life, and rich on-chip peripherals outweigh raw compute throughput.
Key features of the PIC18F26K42 include XLP (eXtreme Low Power) technology with nanoWatt sleep currents, hardware CVD for capacitive touch sensing, vector interrupts with two-level priority, and a Memory Access Partition (MAP) feature for bootloader write protection. The device supports an operating voltage range of 2.3 V to 5.5 V and is qualified for the extended -40 °C to +125 °C industrial temperature range (E suffix). The integrated charge pump allows ADC operation below 1.5 V, broadening battery-powered use cases.
Architecturally, the PIC18F26K42 uses an enhanced Harvard core with a modified RISC instruction set, hardware multiply, and a C-compiler-friendly instruction set. Core-independent peripherals (CLC, NCO, PWM, CWG) can run without the CPU, enabling deterministic timing in motor control, lighting, and sensor signal-conditioning designs while the CPU remains in sleep, drawing only nanoWatt-level currents.
Typical applications include IoT sensor nodes, capacitive touch user interfaces, low-power wireless sensor platforms, building automation, battery chargers, and small BLDC/PMSM motor control. It is also well suited as a companion MCU to a Wi-Fi/BLE module (e.g., Microchip RN4870 or external ESP32) for command translation in connected products.
When designing with this part, ensure that the ICSP/ICD pins (PGx, PGCx) are not loaded down by external circuitry that would prevent in-circuit programming or debugging. Decoupling should follow Microchip's AN583 recommendation: one 100 nF per VDD pin and a bulk 10 µF near the regulator.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, organized for engineers who need a quick, citable comparison across the PIC18 K-series portfolio.
Bộ thay thế dễ dàng lắp đặt cho PIC18F26K42-E/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 PIC18F26K42-E/SO (cùng hình factor và footprint) — khác nhau ở ADC, Package, Program Memory (Flash), Operating Temperature, DAC.
PIC18F26K42-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F26K40-E/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F26K22-E/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F25K42-E/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F46K42-E/SO
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F26K42-E/SO Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit PIC18 enhanced Harvard |
| Program Memory (Flash) | 64 KB (32K x 16) |
| SRAM | 4 KB |
| EEPROM | 1 KB |
| Maximum CPU Frequency | 64 MHz |
| Operating Voltage Range | 2.3 V to 5.5 V |
| Khoảng nhiệt độ hoạt động | -40 C to +125 C (E suffix) |
| Hộp | 28-pin SOIC (SO) |
| I/O Pins | 24 |
| ADC | 12-bit ADC2 with Computation, up to 35 channels |
| DAC | 5-bit DAC |
| Comparators | On-chip |
| PWM Modules | Yes (multiple, with CWG) |
| DMA | Yes |
| Vector Interrupts | Yes, programmable single/dual priority |
| Capacitive Touch (CVD) | Hardware CVD for touch sensing |
| Memory Access Partition (MAP) | Yes, with bootloader write protection |
| XLP (nanoWatt) | Yes |
| ICSP / Debug | Yes (PGECx/PGEDx) |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18F26K42-E/SO
| Chân 1 | RA0/ICDDAT — PORTA bit 0 / ICD Data |
| Chân 2 | RA1/ICDCLK — PORTA bit 1 / ICD Clock |
| Chân 3 | RA2 — PORTA bit 2 |
| Chân 4 | RA3 — PORTA bit 3 |
| Chân 5 | RA4 — PORTA bit 4 |
| Chân 6 | RA5 — PORTA bit 5 |
| Chân 7 | RA6/OSC1 — PORTA bit 6 / Crystal oscillator input |
| Chân 8 | RA7/OSC2/CLKO — PORTA bit 7 / Crystal oscillator output / Clock output |
| Chân 9 | VSS — Ground |
| Chân 10 | RB0 — PORTB bit 0 |
| Chân 11 | RB1 — PORTB bit 1 |
| Chân 12 | RB2 — PORTB bit 2 |
| Chân 13 | RB3 — PORTB bit 3 |
| Chân 14 | RB4 — PORTB bit 4 |
| Chân 15 | RB5 — PORTB bit 5 |
| Chân 16 | RB6/ICSPCLK — PORTB bit 6 / ICSP Clock |
| Chân 17 | RB7/ICSPDAT — PORTB bit 7 / ICSP Data |
| Chân 18 | VSS — Ground (second) |
| Chân 19 | VDD — Positive supply (first) |
| Chân 20 | VDD — Positive supply (second) |
| Chân 21 | RC0 — PORTC bit 0 |
| Chân 22 | RC1 — PORTC bit 1 |
| Chân 23 | RC2 — PORTC bit 2 |
| Chân 24 | RC3 — PORTC bit 3 |
| Chân 25 | RC4 — PORTC bit 4 |
| Chân 26 | RC5 — PORTC bit 5 |
| Chân 27 | RC6 — PORTC bit 6 |
| Chân 28 | RC7 — PORTC bit 7 |
Ứng dụng tiêu biểu
PIC18F26K42-E/SO phù hợp cho 6 Áp dụngs: IoT Sensor Node with Capacitive Touch, Battery-Powered Building Automation Sensor, Small BLDC/PMSM Motor Control (Fan or Pump), User Interface / Touch Control Panel, Automotive Body Electronics (Non-Safety), Industrial Sensor Transmitter (4-20 mA Loop-Powered).
IoT Sensor Node with Capacitive Touch
The PIC18F26K42-E/SO is well suited for low-power IoT sensor nodes that combine capacitive touch input with periodic sensor sampling. Its hardware CVD peripheral automates touch acquisition in sleep, allowing the CPU to remain in nanoWatt sleep while scanning up to 16 touch channels. The 12-bit ADC2 with Computation handles sensor post-processing (averaging, threshold compare, oversampling) without CPU wakeup, and the 64 KB Flash supports over-the-air firmware update via a dual-partition Memory Access Partition bootloader. Pair with an external RN4870 BLE module for command translation. Reference design: Microchip AN2389 (IoT sensor node with touch).
Được đề xuất
Battery-Powered Building Automation Sensor
For wireless building automation sensors (PIR occupancy, CO2, humidity, lighting), the PIC18F26K42-E/SO delivers the right balance of low power and on-chip peripherals. The XLP nanoWatt technology keeps idle current at sub-µA, while the integrated 5-bit DAC, comparators, and ADC2 support direct sensor interfacing without external signal conditioning. The 64 MHz CPU allows fast enough wake cycles to sustain multiple sensor readings between deep sleeps. A single CR2032 can power a multi-year occupancy node using the ADC2 hardware averaging. Reference design: Microchip AN1966 (low-power wireless sensor).
Được đề xuất
Small BLDC/PMSM Motor Control (Fan or Pump)
The PIC18F26K42-E/SO can drive small brushless DC or PMSM motors in fan, pump, and appliance subsystems using its PWM modules, Complementary Waveform Generator (CWG), and comparators. Hardware fault handling (overcurrent via comparator, zero-cross detection via CVD) lets the MCU shut down outputs without CPU latency. The 12-bit ADC2 samples back-EMF or current-sense signals with hardware averaging, supporting sensorless trapezoidal commutation up to a few kW. The 4 KB SRAM holds field-oriented control loops for moderate-speed applications. Reference design: Microchip AN1160 (PIC18 sensorless BLDC).
Được đề xuất
User Interface / Touch Control Panel
The PIC18F26K42-E/SO is a strong fit for capacitive touch panels (buttons, sliders, wheel) on white goods, automotive interior controls, and industrial HMIs. Hardware CVD supports up to 35 channels of touch acquisition with mTouch Studio tuning, while the PIC18 core remains in sleep. The 64 KB Flash handles large mTouch libraries and customizable UI logic. The 5-bit DAC can drive LED backlights or audio cues. The vector interrupt controller ensures low-latency response to touch events, critical for responsive UI. Reference design: Microchip mTouch App Note suite.
Được đề xuất
Automotive Body Electronics (Non-Safety)
The PIC18F26K42-E/SO serves automotive body modules such as interior lighting, HVAC flap control, and seat-position memory where AEC-Q100 is not required. Its 28-SOIC package is compatible with existing automotive PCB footprints. The 12-bit ADC2 with computation reads potentiometers for seat position, while PWM modules drive LED lighting with smooth dimming. DMA moves sensor data to RAM without CPU overhead, freeing cycles for LIN or CAN message handling via a companion transceiver. Note: for safety-critical automotive, choose an AEC-Q100 qualified MCU such as dsPIC33 or PIC18F-Q family parts.
Được đề xuất
Industrial Sensor Transmitter (4-20 mA Loop-Powered)
The PIC18F26K42-E/SO is ideal for industrial 4-20 mA loop-powered sensor transmitters where low power, on-chip ADC accuracy, and small footprint are paramount. The 2.3 V minimum operating voltage (with charge-pump-assisted ADC down to 1.5 V) makes it suitable for loop-powered designs where only 3.6 V is available after the sense resistor. The 12-bit ADC2 provides 0.024% FS accuracy, and the 5-bit DAC can drive a calibration voltage to the loop. Reference design: Microchip AN1415 (loop-powered 4-20 mA sensor).
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F26K42-E/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 | PIC18F26K42-I/SO | PIC18F26K40-E/SO | PIC18F25K42-E/SO | PIC18F26K22-E/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (SO) | 28-SOIC (SO) - same | 28-SOIC (SO) - same | 28-SOIC (SO) - same | 28-SOIC (SO) - same |
| Flash | 64 KB | 64 KB | 32 KB (-50%) | 32 KB (-50%) | 64 KB |
| SRAM | 4 KB | 4 KB | 2 KB (-50%) | 2 KB (-50%) | 3.8 KB (-5%) |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Maximum CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Operating Voltage Range | 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 |
| DMA Controller | Yes | Yes | No | Yes | No |
| Hardware CVD (Capacitive Touch) | Yes | Yes | Yes | Yes | No |
| Temperature Grade (E suffix) | -40C to +125C | -40C to +85C (I suffix) | -40C to +125C | -40C to +125C | -40C to +125C |
| Approx. Unit Price (qty-1, as of 2026-09-27) | $3.95 | $3.60 | $3.20 | $3.10 | $3.30 |
Bảo phân biệt quan trọng
- Highest Flash in 28-SOIC PIC18 K42 family (vsPIC18F25K42-E/SO)
- ADC2 with computation and hardware CVD (vsPIC18F26K22-E/SO)
- DMA controller present (vsPIC18F26K40-E/SO)
Ghi chú thiết kế
The PIC18F26K42-E/SO includes VDDcore and VDDIO pins. Both must be tied together with separate 100 nF decoupling capacitors placed within 1 mm of each pin; add a shared 10 µF bulk capacitor at the regulator output, per Microchip datasheet 40000191B. AVDD and AVSS must be tied to VDD/VSS directly at the IC pins (not at the regulator) when the ADC2 is used. Failure to follow these rules can cause nanoWatt sleep current to exceed 1 µA due to leakage through the I/O ESD diodes.
Do not load the ICSP/ICD pins (RB6/ICSPCLK and RB7/ICSPDAT, and on PORTA RA0/ICDDAT, RA1/ICDCLK) with more than 50 pF of external capacitance or with a pull-up strong enough to sink below Vih during programming. Series resistors above 10 kΩ can prevent reliable ICSP handshake. Reserve these pins for programming access or include test points in the PCB layout per Microchip AN1516.
The 28-SOIC package has moderate thermal resistance (Theta-JA approximately 80 °C/W) and is generally adequate for the PIC18F26K42's low internal power dissipation (<100 mW). For designs in enclosed housings with limited airflow, place the IC away from thermal hotspots and provide a continuous ground copper pour under the SOIC body. PCB layout should follow Microchip AN2480 (8-bit MCU layout checklist): keep oscillator traces short, separate analog and digital grounds, and place the ICSP connector within 50 mm of the ICSP pins.
The PIC18F26K42-E/SO operates from -40 °C to +125 °C (E suffix). At 64 MHz with all peripherals active, core current is roughly 15 mA at 5 V (75 mW). At 125 °C ambient, the junction-to-ambient thermal resistance of the 28-SOIC package ensures the junction stays below 125 °C if the device is not driving external loads. If the MCU is sourcing heavy current through I/O pins (e.g., driving LEDs directly), sum the I/O dissipation into the thermal budget.
Thông tin tuân thủ
PIC18F26K42-E/SO is RoHS compliant per Microchip product page. Not AEC-Q100 qualified - for automotive safety-critical applications, choose dsPIC33 or PIC18F-Q family parts with explicit AEC-Q100 qualification.
