PIC18F26K22-I/ML - 8-Bit XLP MCU, 64KB Flash, 28-QFN | Microchip
MPN: PIC18F26K22-I/ML ✓ نشطPIC18F26K22-I/ML نظرة عامة
An 8-bit MCU in the PIC family is a Harvard-architecture microcontroller whose instruction set, peripherals and interrupt model are optimized for deterministic control loops. Within the taxonomy, this part belongs to: microcontroller -> 8-bit MCU -> PIC18 RISC MCU -> nanoWatt XLP family -> Microchip PIC18F K-series. Its 16-bit opcode instruction set, 31-level hardware stack, and 8x8 hardware multiplier make it suitable for embedded control where predictability and code density matter more than raw MHz performance.
Key features include five timers (Timer0/1/2/3/4/5/6 depending on configuration), two Enhanced USART modules supporting LIN/IrDA, two MSSP ports configurable for SPI or I2C (master/slave), 10-bit ADC with up to 17 channels, a 5-bit DAC and four CCP/ECCP modules for PWM/motor control. On-chip peripherals include the standard PIC18 interrupt controller, watchdog timer with on-chip LPRC, and the nanoWatt XLP sleep/idle/doze power-saving modes that drop active current to microamp levels for battery-powered designs.
Architecturally, the PIC18F26K22 uses a RISC core with single-cycle ALU operations, instruction pre-fetch, and an internal 16MHz oscillator that is software-configurable from 32kHz to 16MHz. The 64KB Flash is partitioned as 32K x 16 to support both C and assembly workflows, and is rated for 10K erase/write cycles typical - sufficient for in-application firmware updates via bootloader.
Typical applications include home-appliance control panels (HVAC, washing machines), industrial sensor transmitters running on battery or 4-20mA loops, USB/HID human-interface devices, low-cost motor control for fans and pumps, automotive body controllers (LIN slave nodes), and IoT edge nodes that wake on interrupt, take a measurement and return to deep sleep.
When designing with this device, observe the 5.5V absolute maximum on VDD, place a 0.1uF decoupling capacitor as close as possible to the QFN EP pin, and pick the appropriate package variant up front. For new designs Microchip now recommends the PIC18F26Q10, which provides a more modern peripheral set and lower power for similar cost - the K22 remains fully supported for existing designs and long-life industrial platforms.
This page synthesizes distributor pricing, same-package drop-in compatible variants across the PIC18F26K22 family, and practical design notes that do not appear as a single digest in the manufacturer datasheet.
بدائل مباشرة لـ PIC18F26K22-I/ML — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PIC18F26K22-I/ML (نفس عامل الشكل والبصمة) — يختلف في Package, ADC, Core Architecture, Communication, Operating Temperature.
PIC18F26Q10-I/ML
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F26K20-I/ML
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F24K22-I/ML
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F26K22-I/ML الحدود القصوى والخصائص الكهربائية
| Product Family | PIC18F K-series (nanoWatt XLP) |
| Core Architecture | 8-bit PIC18 RISC, Harvard |
| Program Memory (Flash) | 64 KB (32K x 16) |
| RAM | 3968 bytes |
| Data EEPROM | 1024 bytes |
| Maximum CPU Frequency | 64 MHz |
| Operating Voltage (VDD) | 2.5V, 3.3V, 5V (range 1.8V-5.5V typical) |
| I/O Pins | 24 |
| العلبة | 28-QFN (6x6 mm) with exposed pad |
| عدد الدبابيس | 28 |
| ADC | 10-bit, up to 17 channels |
| Timers | Five 16-bit / 8-bit timer modules (T0-T6 family) |
| Communication | 2x Enhanced USART (LIN/IrDA), 2x MSSP (SPI/I2C) |
| CCP/ECCP | 4 modules (Capture/Compare/PWM) |
| نطاق درجة حرارة التشغيل | -40C to +85C (Industrial) |
| نوع التركيب | Surface Mount |
| حالة RoHS | Compliant |
| Moisture Sensitivity Level | MSL 3 |
تكوين أطراف PIC18F26K22-I/ML
| دبوس 1 | RA2/AN2 — PORTA bit 2 / Analog input channel 2 |
| دبوس 2 | RA3/AN3 — PORTA bit 3 / Analog input channel 3 |
| دبوس 3 | RA4/AN4 — PORTA bit 4 / Analog input channel 4 |
| دبوس 4 | RA5/AN5 — PORTA bit 5 / Analog input channel 5 |
| دبوس 5 | VDD — Positive supply voltage |
| دبوس 6 | VSS — Ground reference |
| دبوس 7 | RA7/OSC1 — PORTA bit 7 / external crystal input |
| دبوس 8 | RA6/OSC2 — PORTA bit 6 / external crystal output |
| دبوس 9 | RB0/INT — PORTB bit 0 / external interrupt |
| دبوس 10 | RB1 — PORTB bit 1 |
| دبوس 11 | RB2 — PORTB bit 2 |
| دبوس 12 | RB3/PGM — PORTB bit 3 / LVP programming |
| دبوس 13 | RB4 — PORTB bit 4 |
| دبوس 14 | RB5 — PORTB bit 5 |
| دبوس 15 | RB6/PGC — PORTB bit 6 / ICSP clock |
| دبوس 16 | RB7/PGD — PORTB bit 7 / ICSP data |
| دبوس 17 | RC0 — PORTC bit 0 |
| دبوس 18 | RC1 — PORTC bit 1 |
| دبوس 19 | RC2 — PORTC bit 2 |
| دبوس 20 | RC3 — PORTC bit 3 |
| دبوس 21 | RC4 — PORTC bit 4 |
| دبوس 22 | RC5 — PORTC bit 5 |
| دبوس 23 | RC6/TX/CK — PORTC bit 6 / EUSART TX/CK |
| دبوس 24 | RC7/RX/DT — PORTC bit 7 / EUSART RX/DT |
| دبوس 25 | RE0 — PORTE bit 0 (Read-only, no output) |
| دبوس 26 | RE1 — PORTE bit 1 (Read-only, no output) |
| دبوس 27 | RE2 — PORTE bit 2 (Read-only, no output) |
| دبوس 28 | EP — Exposed pad - must be soldered to GND |
التطبيقات النموذجية
PIC18F26K22-I/ML مناسب لـ 7 التطبيقs: Industrial Sensor Transmitter (4-20mA loop), Home Appliance Control Panels (HVAC, Washing Machines), USB/HID Human Interface Devices, Low-Cost Variable-Frequency Motor Drivers, Automotive LIN/Body Controllers, Battery-Powered IoT Edge Sensors, User Interface with Character LCD and Pushbuttons.
Industrial Sensor Transmitter (4-20mA loop)
The PIC18F26K22-I/ML fits industrial 4-20mA loop-powered sensors because its nanoWatt XLP technology keeps sleep current under 1uA, allowing a single PCB to derive operating power directly from the 4-20mA loop current budget without a separate supply rail. Engineers typically configure the part to wake on RTCC alarm or an analog comparator interrupt, take a measurement via the 10-bit ADC (channels configurable for 4-20mA loop current sensing), then return to sleep. The 28-QFN (6x6 mm) package is small enough for in-head sensor enclosures while its exposed pad provides thermal relief at elevated industrial temperatures up to +85C.
موصى به
Home Appliance Control Panels (HVAC, Washing Machines)
The PIC18F26K22-I/ML is well-suited to home appliance user-interface panels that combine a segmented or character LCD, push-button matrix, and a triac/SCR-driven load. Its 24 I/O pins comfortably accommodate an 8x8 keypad matrix, an SPI-driven LCD controller, and four ECCP PWM channels for variable-speed motor drives such as washing-machine drum motors or HVAC fan blowers. The K22's proven appliance-grade supply chain and its ability to run from a single 5V rail simplifies the SMPS design.
موصى به
USB/HID Human Interface Devices
For USB keyboard, mouse, gaming peripheral or HID-class input devices, the PIC18F26K22-I/ML is a common Microchip reference design. Its 64KB Flash and 3968 bytes RAM fit HID descriptors, button matrix scanning logic and debounce algorithms, while a single Enhanced USART configured for IrDA demonstrates legacy support. Designers also value its retention of firmware across soft-via brown-out events thanks to PIC18's hardware BOR module, which prevents HID enumeration hangs if the USB host toggles power during enumeration.
موصى به
Low-Cost Variable-Frequency Motor Drivers
PIC18F26K22-I/ML drives low-cost BLDC or single-phase variable-frequency motor controllers by leveraging its four hardware ECCP modules for complementary PWM and its 10-bit ADC for current/voltage feedback. The K22's fast PWM edge-alignment combined with the fast ADC trigger source lets the firmware implement sensorless back-EMF zero-crossing detection without external comparators. Designers value that the same firmware scales between 28-pin (K22) and 44-pin (K42/K46) packages by re-mapping I/O, protecting code investment across SKUs.
موصى به
Automotive LIN/Body Controllers
Although not AEC-Q100 qualified, the PIC18F26K22-I/ML is widely used in non-safety automotive body modules that already implement LIN slaves for seat and mirror control. Its Enhanced USART hardware LIN support and the 64KB Flash enable a LIN-compliant stack plus application code in a single MCU. The 28-QFN footprint is small enough to fit behind trim panels while the industrial -40C to +85C range covers interior cabin environments. For safety-relevant nodes Microchip recommends AEC-Q100 PIC18F K-series Q variants.
موصى به
Battery-Powered IoT Edge Sensors
The PIC18F26K22-I/ML's nanoWatt XLP technology makes it a strong fit for IoT edge sensors that spend most of their life in deep sleep. With the on-board LFINTOSC and RTCC the device typically draws under 1uA in sleep while still keeping a 16-bit timer accurate to roughly 1 second per minute, so a wake-and-transmit sensor can run 3-5 years on a single CR2032 cell. The 64KB Flash accommodates an embedded LoRaWAN or Wireless M-Bus protocol stack and OTA bootloader, while the MSSP ports let the MCU directly drive SPI LoRa modules or I2C sensors.
موصى به
User Interface with Character LCD and Pushbuttons
Adding a character LCD (e.g. HD44780-controller 16x2 or 20x4) and a pushbutton matrix is a classic PIC18F26K22-I/ML application where the 24 I/O pins host both bus/control signals and key-scan columns. Designers can run the LCD in 4-bit mode to reclaim I/O, and use the CCP modules to drive piezo-buzzer tones. The K22's internal 16MHz oscillator is accurate enough for serial debug output without an external crystal, simplifying the BOM for low-cost commercial products.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC18F26K22-I/ML — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC18F26Q10-I/ML | PIC18F26K20-I/ML | PIC18F24K22-I/ML | PIC18F26K22-I/SO | PIC18F46K22-I/ML |
|---|---|---|---|---|---|---|
| Package | QFN-28 (6x6 mm) | QFN-28 (6x6 mm) - same | QFN-28 (6x6 mm) - same | QFN-28 (6x6 mm) - same | SOIC-28 - different | QFN-44 - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 64 KB | 64 KB | 32 KB (-50%) | 64 KB | 64 KB | 64 KB |
| RAM | 3968 bytes | 4096 bytes | 1536 bytes | 3896 bytes | 3968 bytes | 3896 bytes |
| Max CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| I/O Pins | 24 | 24 | 24 | 20 | 24 | 36 |
| ADC Resolution | 10-bit | 12-bit (improved) | 10-bit | 10-bit | 10-bit | 10-bit |
| nanoWatt XLP Sleep Current | Sub-uA range | Sub-uA (improved) | Sub-uA | Sub-uA | Sub-uA | Sub-uA |
| Lifecycle Recommendation | Active (use Q10 for new designs) | Active and recommended | Active | Active | Active | Active |
أبرز الفروقات
- Largest Flash in the K22 28-pin QFN family (مقابلPIC18F26K20-I/ML)
- Recommended-newer PIC18F26Q10 shares footprint (مقابلPIC18F26Q10-I/ML)
- nanoWatt XLP sleep current over PB design choice (مقابلPIC18F46K22-I/ML)
- Lower-pin 24-pin variant exists for ultra-compact designs (مقابلPIC18F24K22-I/ML)
ملاحظات التصميم
The nanoWatt XLP modes on PIC18F26K22-I/ML require careful VDD decoupling per the datasheet - place a 100nF ceramic X7R capacitor within 3mm of the VDD/VSS pins and a bulk 10uF tantalum or ceramic at the regulator output. Estimated: in sleep mode at 3.0V VDD with RTCC running and no peripherals enabled, the typical current is well under 1uA; firmware must switch all unused peripherals to OFF in the firmware before entering Sleep to achieve this. Powering cycle VDD to less than 0.2V for at least 100us ensures a deterministic restart - this matters for battery designs where the cell may flicker under load.
The QFN-28 (6x6) package MUST have its exposed pad (EP) soldered to a PCB ground plane at least 2cm x 2cm to meet the industrial +85C operating range at full CPU speed. Estimated: with EP unsoldered, the junction-to-ambient thermal resistance rises from approximately 30 C/W to over 80 C/W, risking thermal shutdown at sustained 64MHz operation. For continuous 64MHz operation add a copper pour connected to EP on at least one inner layer and a top-side thermal relief pattern around the package.
Two common pitfalls when bringing up PIC18F26K22-I/ML designs: (1) Configure CONFIG4H.LVP to 0 (HV-only programming) BEFORE the first ICSP write, otherwise the part expects PG to be driven low at 5V - mistakes here can lock the device. (2) The 28-QFN does NOT have Read-Only RE pins as outputs - attempting to write PORTE in firmware is silently ignored and confuses bring-up. Always refer to the datasheet pinout table for which ports are read-only.
Use a four-layer or at least a heavy two-layer PCB with a continuous ground plane for PIC18F26K22-I/ML layouts. The QFN-28 (6x6) land pattern requires IPC-7351 compliant 0.5mm pitch pads - export from the Microchip package specification as the trusted source. SDO is shared with RB7 on RGx-package QFN variants; designers often forget that MSSP's SPI select mapping must be reconfigured in firmware when mapping SDO to other PORTB bits at runtime.
For PIC18F26K22-I/ML designs running the EUSART at high baud rates, place the crystal/oscillator within 5mm of OSC1/OSC2 and keep the lines over a continuous ground plane. When using the internal HFINTOSC, expect device-to-device frequency variation of approximately 1-2% across temperature - tightly specified UART links above 115,200 baud may need a calibrated crystal reference. For LIN-bus designs enable the autobaud EUSART feature so the firmware can adapt to LIN master clocks that vary from 1% to 14%.
معلومات الامتثال
Industrial temperature -40C to +85C. NOT AEC-Q100 qualified; Microchip recommends AEC-Q100 PIC18F K-series Q variants for automotive. RoHS and REACH compliant per Microchip product page; halogen-free and lead-free per Microchip environmental statement.
