PIC18F26K20-I/ML - 64KB Flash 8-Bit MCU, 64MHz, 28-QFN | Microchip
MPN: PIC18F26K20-I/ML ✓ فعالPIC18F26K20-I/ML جائزہ
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and a rich set of peripherals such as ADC, timers, communication interfaces, and general-purpose I/O. Within the broader semiconductor taxonomy, an MCU belongs to the embedded processor category, which sits below microprocessors and above basic digital logic ICs. PIC18F microcontrollers use a modified Harvard RISC architecture with a 16-bit instruction word optimized for C code density, and the 'K20' sub-family adds nanoWatt XLP technology to dramatically reduce active and sleep power compared to legacy PIC18 parts.
Key features include a 10-bit ADC with up to 11 input channels, two analog comparators, a hardware USART, MSSP for SPI and I2C (both Master and Slave), two CCP modules and one enhanced CCP for PWM and capture/compare, four 8-bit timers plus three 16-bit timers, and 25 mA capable I/O suitable for direct LED drive. The internal oscillator block provides factory-calibrated 16 MHz and selectable frequencies up to 64 MHz via the 4x PLL, often eliminating the need for an external crystal in cost-sensitive designs.
The -I/ML part is specified for 1.8V to 3.6V core operation and 4.2V to 5.5V extended-range operation, and supports ICSP (In-Circuit Serial Programming) plus optional low-voltage programming. The QFN-28 package offers a small 6x6 mm footprint with an exposed thermal pad, ideal for space-constrained PCB layouts. Self-programmability under firmware control and Microchip's free MPLAB X IDE + XC8 toolchain enable field-upgradeable end products.
Typical applications include low-power wireless sensor nodes, battery-powered HVAC thermostats, portable medical monitors, USB HID human-interface devices, white-goods motor control, and remote controls. The combination of nanoWatt XLP sleep current and rich peripherals allows designers to meet multi-year battery-life targets while still driving user interfaces and analog sensors.
When designing with this device, leave at least 4 mm2 of copper under the QFN exposed pad tied to VSS for thermal relief and reliable reflow. Place a 100 nF decoupling capacitor within 3 mm of each power pin, and reserve the ICSP/ICD pins (PGC/PGD, MCLR) for in-circuit programming access. To preserve the ultra-low sleep current of ~20 nA, ensure unused I/O pins are configured as outputs or tied to VDD/VSS through software, never left floating.
This page consolidates Microchip datasheet specifications, current distributor pricing tiers, same-package drop-in alternatives, and practical PCB design notes into a single reference so you can evaluate the PIC18F26K20-I/ML without leaving the page.
کے لیے ڈراپ اِن متبادل PIC18F26K20-I/ML — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں PIC18F26K20-I/ML (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Core Architecture, Package, Communication, Program Memory (Flash), Timers.
PIC18F25K20-I/ML
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
PIC18F26K20-E/ML
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC18F26K22-I/ML
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC18F25K22-I/ML
✅ ڈراپ-اِن ⚠️ تفصیلات غیر تصدیق شدہقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC18F25K40-I/ML
✅ ڈراپ-اِن ⚠️ تفصیلات غیر تصدیق شدہ📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
PIC18F25K50-I/ML
✅ ڈراپ-اِن ⚠️ تفصیلات غیر تصدیق شدہقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC18F26K20-I/ML زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Core Architecture | PIC18 8-bit RISC (modified Harvard) |
| Program Flash | 64 KB |
| RAM | 3,968 bytes |
| EEPROM | 1,024 bytes |
| Maximum CPU Clock | 64 MHz (16 MIPS) |
| Supply Voltage (Core) | 1.8 V to 3.6 V |
| Supply Voltage (Extended) | 4.2 V to 5.5 V |
| I/O Pins | 25 |
| ADC | 10-bit, up to 11 channels |
| Timers | 4 x 8-bit + 3 x 16-bit |
| Capture/Compare/PWM | 2 CCP + 1 ECCP |
| Communication | 1 x USART (EUSART), 1 x MSSP (SPI/I2C) |
| Analog Comparators | 2 |
| Internal Oscillator | 31 kHz to 16 MHz with 4x PLL |
| آپریٹنگ درجہ حرارت | -40 C to +85 C (Industrial) |
| پیکیج | QFN-28 (6x6 mm) with exposed thermal pad |
| ماؤنٹنگ ٹائپ | Surface Mount |
| MSL لیول | 3 |
| RoHS اسٹیٹس | Compliant |
| Lead-Free / Halogen-Free | Yes / Yes |
PIC18F26K20-I/ML پن کنفیگریشن
| پن 1 | RA2 — Digital I/O / analog input AN2 / CVREF |
| پن 2 | RA3 — Digital I/O / analog input AN3 / VREF+ |
| پن 3 | RA4 — Digital I/O / analog input AN4 / Timer0 clock |
| پن 4 | RA5 — Digital I/O / analog input AN5 / Timer1 clock |
| پن 5 | RA6 — Digital I/O / oscillator pin |
| پن 6 | RA7 — Digital I/O / oscillator pin |
| پن 7 | VSS — Ground reference |
| پن 8 | VDD — Positive supply voltage |
| پن 9 | RB0 — Digital I/O / interrupt-on-change / AN10 |
| پن 10 | RB1 — Digital I/O / interrupt-on-change / AN8 |
| پن 11 | RB2 — Digital I/O / interrupt-on-change |
| پن 12 | RB3 — Digital I/O / interrupt-on-change / PGM |
| پن 13 | RB4 — Digital I/O / interrupt-on-change |
| پن 14 | RB5 — Digital I/O / interrupt-on-change / PGC |
| پن 15 | RB6 — Digital I/O / interrupt-on-change / PGD |
| پن 16 | RB7 — Digital I/O / interrupt-on-change |
| پن 17 | RC0 — Digital I/O / SOSCO |
| پن 18 | RC1 — Digital I/O / SOSCI / CCP2 |
| پن 19 | RC2 — Digital I/O / CCP1 / AN11 |
| پن 20 | RC3 — Digital I/O / SCL / AN7 |
| پن 21 | RC4 — Digital I/O / SDA |
| پن 22 | RC5 — Digital I/O / SDO |
| پن 23 | RC6 — Digital I/O / TX |
| پن 24 | RC7 — Digital I/O / RX / DT |
| پن 25 | MCLR — Master clear / reset input (active low) |
| پن 26 | RA0 — Digital I/O / analog input AN0 |
| پن 27 | RA1 — Digital I/O / analog input AN1 |
| پن 28 | VSS — Ground reference (thermal pad recommended) |
عام استعمالات
PIC18F26K20-I/ML کے لیے موزوں ہے 6 ایپلیکیشنs: Battery-Powered Wireless Sensor Nodes, HVAC Thermostats and Building Controls, Portable Medical Monitoring Devices, Industrial Sensor and Process Transmitters, USB HID Human-Interface Devices, White-Goods Motor and Appliance Control.
Battery-Powered Wireless Sensor Nodes
The PIC18F26K20-I/ML is well matched to wireless sensor nodes because its nanoWatt XLP sleep current of ~20 nA typical lets the MCU spend most of its life in sleep between sensor reads and radio transmissions. The 64 KB Flash comfortably holds an IEEE 802.15.4 or sub-GHz protocol stack plus application code, while the 3,968 bytes of RAM is sufficient for sensor buffers and link-layer queues. The internal 16 MHz oscillator (4x PLL to 64 MHz) eliminates an external crystal, reducing BOM cost and quiescent draw. Pairing with a sub-GHz transceiver such as Microchip's MRF89XA yields a battery life measured in years on a single coin cell, ideal for environmental and building-automation telemetry.
تجویز کردہ
HVAC Thermostats and Building Controls
In HVAC thermostats, the PIC18F26K20-I/ML provides the analog and digital peripherals required to read temperature, humidity, and user input while driving a triac-controlled HVAC load. Its 10-bit ADC with 11 channels handles NTC thermistor dividers and rotary encoder inputs; the 2 CCP + 1 ECCP block can generate zero-cross synchronized PWM for triac firing. The 25 mA I/O directly drives LED indicators and a character LCD, while USART and MSSP interfaces communicate with Wi-Fi or BLE modules for cloud connectivity. Industrial -40 C to +85 C temperature grade and robust ESD performance allow direct deployment in equipment rooms and on-wall enclosures.
تجویز کردہ
Portable Medical Monitoring Devices
Portable medical devices such as pulse oximeters, glucose meters, and portable ECG monitors benefit from the PIC18F26K20-I/ML's combination of low active power, integrated 10-bit ADC for sensor front-ends, and ample Flash for trend logging. The 64 KB program memory supports USB HID or CDC stacks for direct PC interface, while 3,968 bytes of RAM holds short-term waveforms and rolling averages. XLP sleep current extends battery life between measurements, critical for chronic-disease management devices prescribed for daily use. The 28-QFN 6x6 mm footprint fits comfortably in handheld plastic enclosures.
تجویز کردہ
Industrial Sensor and Process Transmitters
Industrial 4-20 mA loop-powered transmitters use the PIC18F26K20-I/ML to digitize sensor signals, perform linearization, and modulate the loop current. The 10-bit ADC is sufficient for pressure, flow, and level sensors; the MSSP supports SPI sensor ICs while the USART supports digital panel-meter output. Industrial temperature grade plus the MCU's robust analog performance allow deployment in -40 C factory environments without additional shielding. The 64 KB Flash reserves room for custom linearization tables, Modbus RTU stacks, and future firmware updates via ICSP.
تجویز کردہ
USB HID Human-Interface Devices
USB Human Interface Devices such as keyboards, mice, custom keypads, and game controllers can be implemented on the PIC18F26K20-I/ML using the MSSP for USB bit-banging plus 64 KB Flash to host the HID descriptor and protocol stack. The 25 mA I/O directly drives LED indicators and key-scanning matrices without external drivers, while the hardware USART and CCP modules can support additional features like capacitive-touch sliders and rotary encoders. Operating from a single 5 V USB rail simplifies power architecture, and ICSP allows field firmware updates without opening the enclosure.
تجویز کردہ
White-Goods Motor and Appliance Control
Washing machines, dishwashers, and small kitchen appliances use the PIC18F26K20-I/ML to control BLDC, universal, or shaded-pole motors via the ECCP PWM output and dedicated timer channels. The 2 analog comparators implement current-limit and zero-cross detection, while the 10-bit ADC monitors motor current and supply voltage. The industrial -40 C to +85 C temperature grade plus robust ESD allow placement near power electronics, and 64 KB Flash reserves space for proprietary motor-control algorithms and user-interface state machines.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا PIC18F26K20-I/ML — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | PIC18F25K20-I/ML | PIC18F26K20-E/ML | PIC18F26K22-I/ML | PIC18F25K22-I/ML | PIC18F25K40-I/ML | PIC18F25K50-I/ML |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | QFN-28 (ML) 6x6 | QFN-28 (ML) 6x6 - same | QFN-28 (ML) 6x6 - same | QFN-28 (ML) 6x6 - same | QFN-28 (ML) 6x6 - same | QFN-28 (ML) 6x6 - same | QFN-28 (ML) 6x6 - same |
| Program Flash | 64 KB | 32 KB | 64 KB | 64 KB | 32 KB | 32 KB | 32 KB |
| Maximum Clock | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 48 MHz |
| I/O Pins | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Extended -40C to +125C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C |
| On-Chip USB | No (bit-bang only) | No | No | No | No | No | Yes (USB 2.0 FS) |
| XLP nanoWatt Sleep | Yes (~20 nA typical) | Yes | Yes | Yes | Yes | Yes | Yes |
| ADC Channels | 11 (10-bit) | 11 | 11 | 11 | 11 | 11 | 11 |
اہم امتیازی خصوصیات
- Largest Flash in the 28-QFN K20 family (بمقابلہPIC18F25K20-I/ML)
- Extended temperature option available (بمقابلہPIC18F26K20-E/ML)
- Newer K22 family upgrade path with full component repoversy (بمقابلہPIC18F26K22-I/ML)
- Optional on-chip USB peripheral in K50 family (بمقابلہPIC18F25K50-I/ML)
ڈیزائن نوٹس
The 28-QFN (ML) package has an exposed thermal pad that MUST be soldered to a copper pour tied to VSS to meet the datasheet's thermal resistance specification and to ensure reliable reflow. Recommended: at least 4 mm2 of continuous copper under the pad, with thermal vias to internal ground layers for high-power or sealed-enclosure designs.
Place a 100 nF decoupling capacitor within 3 mm of every VDD pin and a bulk capacitor (1-10 uF) at the regulator output. To preserve the XLP sleep current (~20 nA typical), configure unused I/O as outputs or tie them to VDD/VSS in firmware, never leave floating, and disable unused peripherals in firmware before entering sleep.
Reserve PGC/PGD (RB5/RB6) and MCLR pins for ICSP access; pulling them up with 10 kohm and isolating them from heavy-load drivers prevents programming failures. The internal oscillator's factory calibration is only accurate to within a few percent; for asynchronous serial or USB bit-banging, tune OSCTUNE per application note or use an external crystal.
Route the analog (RA/AN) traces away from switching nodes and the triac/MOSFET drive traces; place the AGND island as a star-ground tied to VSS at one point only. Keep analog traces short and shield them with a ground pour on the layer below to minimize ADC noise pickup at low sensor signal levels.
For I2C operation above 400 kHz, add 4.7 kohm pull-ups on SCL/SDA and series resistors near the MCU pin to suppress ringing. For SPI at high speeds, route CLK and MOSI/MISO as a matched-length group and avoid running them parallel to noise sources for more than a few millimeters.
تعمیل کی معلومات
RoHS and lead-free confirmed per Microchip product page and DigiKey listing; AEC-Q100 not applicable for industrial-grade -I parts; automotive-grade version is the PIC18F26K20-E/ML extended temperature variant.
