PIC18F26K40-I/ML - 64KB Flash 8-bit MCU 28-QFN | Microchip
MPN: PIC18F26K40-I/ML ✓ Hoạt độngPIC18F26K40-I/ML Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), working memory (RAM), non-volatile data storage (EEPROM), and configurable peripherals such as ADC, PWM, timers, and communication interfaces. Within the broader semiconductor hierarchy, the PIC18F26K40 sits in the 8-bit MCU class, beneath 16-bit dsPIC and 32-bit ARM Cortex-M families, and is designed for cost-sensitive, deterministic, low-power embedded control.
Key features include a 10-bit ADC with up to 24 channels, a 5-bit DAC, two comparators, multiple PWM/CWG/CCP/SMT modules, a windowed watchdog (WWDT), a CRC/SCAN memory integrity block, and Core Independent Peripherals (CIPs) that offload tasks from the CPU. The device operates across 2.3V to 5.5V, supports the nanoWatt XLP sleep modes, and provides 25 general-purpose I/O pins on this 28-pin variant.
Typical applications include consumer appliance control, IoT sensor nodes, low-power wireless remote controls, LED lighting controllers, motor control loops, and battery-powered instrumentation. The combination of 5V tolerance, large memory, and rich analog integration makes the part well suited for both retrofit legacy 5V designs and modern mixed-signal products.
When designing with this MCU, allocate the 64 KB Flash carefully between bootloader, application, and configuration words; verify VDDCORE decoupling against the datasheet, and use the dedicated ICSP pins (ICSPCLK/ICSPDAT) for production programming. The ML package has an exposed thermal pad that must be soldered to the ground plane for thermal and electrical performance. 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 PIC18F26K40-I/ML — 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 PIC18F26K40-I/ML (cùng hình factor và footprint) — khác nhau ở ADC, Package, Program Memory (Flash), Operating Temperature, PWM Channels.
PIC18F26K40T-I/ML
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF26K40-I/ML
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F25K40-I/ML
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F26K42-I/ML
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F26K40-E/MLVAO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F24K40-I/ML
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18F26K40-I/ML Tỷ lệ tối đa & tính chất điện
| Core | PIC18 8-bit RISC |
| CPU Speed (Max) | 64 MHz |
| Program Memory (Flash) | 64 KB (32K x 16) |
| Data RAM | 4 KB |
| Data EEPROM | 256 B |
| Operating Voltage | 2.3 V to 5.5 V |
| I/O Pins | 25 |
| ADC | 10-bit, up to 24 channels |
| DAC | 5-bit |
| Comparators | 2 |
| Timers | 9 (8/16-bit) |
| PWM Channels | Multiple (CCP, PWM, CWG) |
| Hộp | 28-QFN (ML) 6x6 mm with EP |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Kiểu lắp đặt | Surface Mount |
| XLP (nanoWatt) | Yes |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18F26K40-I/ML
| Chân 1 | RA3/AN17/SSP1MSPS — Bidirectional I/O / Analog input 17 / SSP1 master-out slave-in |
| Chân 2 | RA2/AN18 — Bidirectional I/O / Analog input 18 |
| Chân 3 | RA1/AN19 — Bidirectional I/O / Analog input 19 |
| Chân 4 | RA0/AN20 — Bidirectional I/O / Analog input 20 |
| Chân 5 | VDD — Positive supply voltage (2.3V - 5.5V) |
| Chân 6 | VSS — Ground reference |
| Chân 7 | RA7/OSC1/CLKIN — Bidirectional I/O / External clock input / Crystal oscillator input |
| Chân 8 | RA6/OSC2/CLKOUT — Bidirectional I/O / Crystal oscillator output / Clock output |
| Chân 9 | RC0 — Bidirectional I/O port C |
| Chân 10 | RC1 — Bidirectional I/O port C |
| Chân 11 | RC2/AN14 — Bidirectional I/O / Analog input 14 |
| Chân 12 | RC3/AN15/SCL1 — Bidirectional I/O / Analog input 15 / I2C1 clock |
| Chân 13 | RC4/SDA1 — Bidirectional I/O / I2C1 data |
| Chân 14 | RC5 — Bidirectional I/O port C |
| Chân 15 | RC6 — Bidirectional I/O port C |
| Chân 16 | RC7 — Bidirectional I/O port C |
| Chân 17 | RB7/ICSPCLK — Bidirectional I/O / ICSP clock (programming) |
| Chân 18 | RB6/ICSPDAT — Bidirectional I/O / ICSP data (programming) |
| Chân 19 | RB5/AN13 — Bidirectional I/O / Analog input 13 |
| Chân 20 | RB4/AN11 — Bidirectional I/O / Analog input 11 |
| Chân 21 | RB3/AN9 — Bidirectional I/O / Analog input 9 |
| Chân 22 | RB2/AN8 — Bidirectional I/O / Analog input 8 |
| Chân 23 | RB1/AN10 — Bidirectional I/O / Analog input 10 |
| Chân 24 | RB0/AN12/INT0 — Bidirectional I/O / Analog input 12 / External interrupt 0 |
| Chân 25 | VDDIO — I/O supply voltage (for PORTA/PORTB voltage tolerance) |
| Chân 26 | VSS — Ground reference |
| Chân 27 | RA5 — Bidirectional I/O port A |
| Chân 28 | RA4 — Bidirectional I/O port A |
Ứng dụng tiêu biểu
PIC18F26K40-I/ML phù hợp cho 7 Áp dụngs: Consumer Appliance Control, Battery-Powered IoT Sensor Node, LED Lighting Controller, Automotive Body Control Modules (non-safety), Industrial Sensor Interface Module, HMI / User Interface Panel, Motor Control (BLDC / Stepper).
Consumer Appliance Control
The PIC18F26K40-I/ML fits consumer appliance control boards where 5V tolerance, 25 I/O pins, and 64 KB Flash support both HMI driving and closed-loop motor/PWM control. Its 10-bit ADC and 5-bit DAC cover analog sensor readout for temperature, humidity, and current sensing, while CCP/CWG peripherals drive TRIAC or IGBT switches for heater regulation. XLP nanoWatt sleep modes reduce standby power to nanoamp levels between user interactions. Place decoupling 100nF + 1uF near VDDCORE/VDD per datasheet DS40001886.
Được đề xuất
Battery-Powered IoT Sensor Node
For IoT sensor nodes, the PIC18F26K40-I/ML provides nanoWatt XLP sleep currents in the nA range, waking on RTC or external interrupt to read sensors and transmit via a companion BLE/sub-GHz radio over UART/SPI. The 64 KB Flash accommodates OTA bootloader plus application, while the 10-bit ADC digitizes analog sensor outputs directly. The wide 2.3-5.5V supply range supports single-cell Li-ion, 2xAA, and even USB-powered designs without level shifters for legacy 5V sensors.
Được đề xuất
LED Lighting Controller
The PIC18F26K40-I/ML drives multi-channel LED lighting fixtures using its CCP/CWG/PWM peripherals for smooth dimming and color-mixing control. With 64 KB Flash and 4 KB RAM, firmware can implement DMX-512 or DALI receive plus closed-loop constant-current control. The 10-bit ADC reads photodiode feedback for ambient sensing; the CWG peripheral generates complementary PWM with dead-time control for half-bridge LED driver stages. Operating voltage up to 5.5V aligns with standard LED driver IC supply rails.
Được đề xuất
Automotive Body Control Modules (non-safety)
For non-safety automotive body electronics such as interior lighting, mirror control, or seat-position memory, the PIC18F26K40-I/ML offers 5V operation tolerant of load-dump transients (with external TVS) and -40C to +125C automotive temperature grade via PIC18F26K40-E variant. The 64 KB Flash handles LIN protocol stack plus application logic; CCP/CWG modules drive solenoids or motors. For AEC-Q100 qualified variants, designers should select the explicitly automotive-qualified ordering code per Microchip's selector guide.
Được đề xuất
Industrial Sensor Interface Module
In industrial 4-20 mA loop-powered transmitters, the PIC18F26K40-I/ML serves as the digital heart that digitizes the analog sensor, applies calibration in Flash-resident lookup tables, and drives an HART modem or 4-20 mA DAC output. The 10-bit ADC is sufficient for process variables; for higher accuracy, an external 16-bit ADC such as MCP3421 can be paired over I2C. The wide 2.3-5.5V supply allows direct connection to loop-powered 24V systems via a switching regulator such as MCP16311.
Được đề xuất
HMI / User Interface Panel
The PIC18F26K40-I/ML drives small graphical or segment LCDs and keypads via its 25 GPIO, with 64 KB Flash supporting a small RTOS-like state machine or UI library. The CWG peripheral can generate complementary drive signals for segment LCD bias; comparators handle cap-touch via charge-time measurement. The 5V tolerance simplifies interface to legacy 5V LCD modules without level shifters. PIC's deterministic interrupt latency is well suited to responsive button debouncing.
Được đề xuất
Motor Control (BLDC / Stepper)
The PIC18F26K40-I/ML drives small BLDC or stepper motors via its PWM, CCP, and CWG modules that provide complementary outputs with programmable dead time. The 10-bit ADC samples back-EMF or current-sense signals for sensorless or sensored commutation algorithms, while the WWDT and CRC/SCAN peripherals support ASIL-friendly fault detection (non-safety only). The 64 MHz core runs FOC at low to mid RPM; for high-RPM FOC consider dsPIC33. The exposed pad on the 28-QFN aids thermal dissipation at moderate PWM duty.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F26K40-I/ML — 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 | PIC18F26K40T-I/ML | PIC18LF26K40-I/ML | PIC18F25K40-I/ML | PIC18F26K42-I/ML | PIC18F24K40-I/ML |
|---|---|---|---|---|---|---|
| Package | 28-QFN (ML) 6x6 mm | 28-QFN (ML) - same | 28-QFN (ML) - same | 28-QFN (ML) - same | 28-QFN (ML) - same | 28-QFN (ML) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | PIC18 8-bit, 64 MHz | PIC18 8-bit, 64 MHz | PIC18 8-bit, 64 MHz | PIC18 8-bit, 64 MHz | PIC18 8-bit, 64 MHz | PIC18 8-bit, 64 MHz |
| Flash | 64 KB | 64 KB | 64 KB | 32 KB | 64 KB | 16 KB |
| RAM | 4 KB | 4 KB | 4 KB | 2 KB | 4 KB | 1 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| ADC | 10-bit | 10-bit | 10-bit | 10-bit | 12-bit | 10-bit |
| Operating Voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V |
| I/O Pins | 25 | 25 | 25 | 25 | 25 | 25 |
Bảo phân biệt quan trọng
- 64 KB Flash + 4 KB RAM in 28-pin QFN (vsPIC18F25K40-I/ML)
- Wide 2.3V-5.5V operating voltage (vsPIC18LF26K40-I/ML)
- Rich Core Independent Peripherals (CIPs) (vsPIC18F26K20-I/ML)
Ghi chú thiết kế
Decouple VDD with a 100 nF X7R ceramic placed within 3 mm of the pin, plus a bulk 1 uF-10 uF tantalum or ceramic on the same node. The 28-QFN ML package has separate VDD and VDDIO pins; both need their own 100 nF caps. For low-noise ADC performance, add a ferrite bead on VDDIO or use a separate LDO to power the analog rail. Estimated: at 64 MHz / 3.3V active current is roughly 8-12 mA typical per DS40001886; sleep current drops to <100 nA with WDT disabled.
The 28-QFN (ML) package has a center exposed thermal pad (EP) that must be soldered to a ground copper pour of at least 1 square inch for thermal dissipation and electrical performance. Use an array of thermal vias (0.3 mm drill, 0.5 mm pitch) connecting the EP to the inner ground plane. Route high-speed signals (SPI, ICSP) away from the ADC analog inputs and place the analog ground island directly under the analog pins. Refer to Microchip AN2451 for 8-bit MCU PCB layout guidelines.
Do NOT drive the ICSPDAT/ICSPCLK pins (RB6/RB7) with external peripherals during programming - this can lock out ICSP and require high-voltage reset to recover. The PIC18F26K40 has an internal voltage regulator that requires an external decoupling capacitor on the VDDCORE pin (refer to datasheet DS40001886 for cap value and routing). Configuration bits (CONFIG1-7) must be set correctly - especially the WDT, BOR, and oscillator settings - before code can execute reliably from reset.
The PIC18F26K40 ADC accuracy depends on clean VDD, low-impedance external Vref, and proper acquisition time programming. For 10-bit accuracy at 64 MHz ADC clock, use at least 8 us acquisition time for high-impedance sources (10 kohm+); use a buffer op-amp (e.g., MCP6002) for sources above 10 kohm. Place the Vref bypass cap (100 nF) directly at the Vref+ pin. When using the FVR (Fixed Voltage Reference), enable it at least 5 us before ADC conversion to settle.
Thông tin tuân thủ
RoHS/REACH compliant per Microchip product page. Industrial temperature grade -40C to +85C. For AEC-Q100 qualified variants, select PIC18F26K40-E (extended grade) ordering code; the -I/ML industrial-grade version is not AEC-Q100 qualified.
