PIC18F26K40-E/MLVAO - 8-bit MCU, 64KB Flash, 28-QFN | Microchip
MPN: PIC18F26K40-E/MLVAO ✓ Hoạt độngPIC18F26K40-E/MLVAO Tóm tắt
What is an 8-bit microcontroller? An MCU (microcontroller unit) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, I/O peripherals, and often analog blocks onto one die. Within the broader taxonomy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor -> IC. The PIC18 family is Microchip's high-performance 8-bit line, sitting above the PIC16/PIC12 in peripheral richness and instruction throughput while remaining code-compatible with the legacy PIC16 instruction set.
Key features include Core Independent Peripherals (CIPs) such as CWG (Complementary Waveform Generator), the configurable WWDT, CRC/Scan, the Hardware Limit Timer (HLT) and 10-bit ADC2 with averaging, oversampling and automated threshold comparison. Together these allow closed-loop control, signal conditioning, and safety monitoring without CPU intervention. The device supports up to 36 MHz internal or external clock and includes 25 I/O pins with interrupt-on-change.
Architecture: an enhanced Harvard RISC core with 16-bit opcodes, 8-bit data path, hardware multiply, and a 31-level interrupt vector table. The on-chip FVR (Fixed Voltage Reference) and bandgap provide stable references for the ADC2 and comparators, and nanoWatt XLP modes enable <50 nA sleep currents for battery-powered designs.
Typical applications: industrial sensor nodes, automotive body and HVAC modules, low-power IoT edge devices, small appliances with touch and PWM drive, and consumer products that need 5V-tolerant I/O. Designers pick this part when they want the 28-pin QFN footprint, 5V tolerance and rich analog/mixed-signal peripherals on a low-power core.
Design consideration: route the AVSS/VDD pairs with separate analog and digital decoupling (100 nF + 1 uF each), use a low-ESR 1 uF on VDD and place it within 3 mm of the pin, and select the correct ICSP PGECx/PGEDx pair when designing for in-circuit programming or debugging.
This page synthesizes verified distributor pricing, drop-in alternative MPNs and practical design notes that complement - and go beyond - the manufacturer datasheet, helping engineers pick the right part faster.
Bộ thay thế dễ dàng lắp đặt cho PIC18F26K40-E/MLVAO — 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-E/MLVAO (cùng hình factor và footprint) — khác nhau ở ADC, Package, Operating Temperature, Core Architecture, PWM Channels.
PIC18F26K40-E/ML
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18F26K40T-E/MLVAO
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18F46K40-I/ML
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18F26K22-E/ML
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F25K42-E/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F26Q43-I/ML
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F26K40-E/MLVAO Tỷ lệ tối đa & tính chất điện
| Product Type | 8-bit Microcontroller (MCU) |
| Family | PIC18 (K40 series) |
| Core Architecture | PIC18 Enhanced Harvard RISC |
| Program Memory (Flash) | 64 KB |
| Data Memory (SRAM) | 4 KB |
| EEPROM | 1 KB |
| Operating Voltage (VDD) | 2.3 V to 5.5 V |
| Maximum CPU Frequency | 64 MHz (16 MIPS) |
| ADC | 10-bit ADC2 with Computation |
| DAC | 5-bit DAC |
| Comparators | Yes |
| PWM Channels | Yes (CCP, PWM) |
| CWG (Complementary Waveform Generator) | Yes |
| Windowed Watchdog Timer (WWDT) | Yes |
| CRC/Scan | Yes |
| I/O Pins | 25 |
| Nhiệt độ hoạt động | -40C to +125C (extended) |
| Hộp | 28-pin QFN (ML, 6x6 mm) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18F26K40-E/MLVAO
| Chân 1 | RA5 — General purpose I/O / ADC / segment drive |
| Chân 2 | RA4 — General purpose I/O / ADC |
| Chân 3 | RA3 — General purpose I/O / ADC / VREF+ |
| Chân 4 | RA2 — General purpose I/O / ADC / VREF- |
| Chân 5 | RA1 — General purpose I/O / ADC / comparator input |
| Chân 6 | RA0 — General purpose I/O / ADC / ICSPDAT |
| Chân 7 | VSS — Ground reference |
| Chân 8 | RA7 — General purpose I/O / oscillator / ADC |
| Chân 9 | RA6 — General purpose I/O / oscillator / ADC |
| Chân 10 | RC0 — General purpose I/O / PWM |
| Chân 11 | RC1 — General purpose I/O / PWM |
| Chân 12 | RC2 — General purpose I/O / PWM / comparator |
| Chân 13 | RC3 — General purpose I/O / PWM / SCL |
| Chân 14 | RC4 — General purpose I/O / PWM / SDA |
| Chân 15 | RC5 — General purpose I/O / PWM |
| Chân 16 | RC6 — General purpose I/O / TX |
| Chân 17 | RC7 — General purpose I/O / RX |
| Chân 18 | VSS — Ground reference (digital) |
| Chân 19 | VDD — Positive supply (digital) |
| Chân 20 | RB0 — General purpose I/O / interrupt / PWM |
| Chân 21 | RB1 — General purpose I/O / interrupt / PWM |
| Chân 22 | RB2 — General purpose I/O / interrupt / PWM |
| Chân 23 | RB3 — General purpose I/O / interrupt / PWM |
| Chân 24 | RB4 — General purpose I/O / interrupt / PWM |
| Chân 25 | RB5 — General purpose I/O / interrupt / PWM |
| Chân 26 | RB6 — General purpose I/O / interrupt / PGC |
| Chân 27 | RB7 — General purpose I/O / interrupt / PGD |
| Chân 28 | AVDD — Positive supply (analog) |
| Chân EP | EP — Exposed thermal/ground pad - solder to PCB ground plane |
Ứng dụng tiêu biểu
PIC18F26K40-E/MLVAO phù hợp cho 7 Áp dụngs: Industrial Sensor Node, Automotive Body and HVAC Module, Low-Power IoT Edge Device, Small Appliance Control, Consumer Remote Control with Touch, Battery Charger / Power Management Front-End, Security and Access Control Panel.
Industrial Sensor Node
The PIC18F26K40-E/MLVAO fits industrial sensor nodes because its XLP nanoWatt modes drop quiescent current below 50 nA in sleep, while 64 KB Flash and 4 KB SRAM host protocol stacks such as Modbus RTU or IO-Link. Its 10-bit ADC2 with computation performs on-chip averaging, oversampling and threshold comparison without waking the CPU, reducing firmware complexity for thermocouple, pressure and flow sensors. The 28-QFN (ML) package keeps node PCBs under 15 mm x 15 mm, and -40C to +125C operation tolerates factory-floor temperature swings.
Được đề xuất
Automotive Body and HVAC Module
In automotive body and HVAC ECUs the PIC18F26K40-E/MLVAO delivers 5 V-tolerant I/O that interfaces directly with 12 V battery rails through external resistors, while CWG drives half-bridges for fan and damper control. The Hardware Limit Timer (HLT) and PWM/CCP provide fail-safe actuation, and CRC/Scan verifies Flash integrity at power-on for functional-safety awareness. The -E extended temperature grade handles under-dash thermal loads, and the 28-QFN (ML) footprint simplifies layout under tight packaging constraints in HVAC housings.
Được đề xuất
Low-Power IoT Edge Device
The PIC18F26K40-E/MLVAO is well-suited to battery-powered IoT edge nodes because XLP technology achieves sub-uA sleep currents and 64 KB Flash accommodates TLS-style stacks and OTA bootloaders. The integrated 10-bit ADC2 and 5-bit DAC allow direct interface with analog sensors and piezo buzzer/MEMS microphone front-ends, while the 25 I/O pins drive indicator LEDs, user buttons and SPI/I2C peripherals. Its 2.3-5.5 V VDD range simplifies designs powered by 3.6 V Li-SOCl2 or rechargeable Li-ion cells, with the 28-QFN (ML) helping keep the BOM small.
Được đề xuất
Small Appliance Control
Coffee machines, blenders and washing appliances benefit from the PIC18F26K40-E/MLVAO's CWG and PWM channels that directly drive TRIACs, MOSFETs and brushless DC actuators with dead-band control. ADC2 with computation reads NTC temperature probes and pressure sensors in real time, while the comparator and HLT timer implement safety shutoff without software overhead. The 28-QFN (ML) and 5 V I/O tolerance eliminate level shifters against 5 V sensor bridges, reducing BOM cost in volume production.
Được đề xuất
Consumer Remote Control with Touch
Remotes for set-top boxes and smart TVs run for years on two AA cells when built around the PIC18F26K40-E/MLVAO, thanks to XLP sleep currents and the integrated ADC2 that scans capacitive touch buttons with <2 uA active current. The 64 KB Flash stores IR/RF protocols (RC5, NEC, BLE-HID bridge code), and 4 KB SRAM buffers scanned touch data. The 5 V-tolerant I/O and PWM drive an indicator LED and IR emitter directly, while the 28-QFN keeps the remote slim and lightweight.
Được đề xuất
Battery Charger / Power Management Front-End
The PIC18F26K40-E/MLVAO monitors voltage, current and temperature in multi-chemistry chargers through ADC2 with hardware averaging and the on-chip comparator for current-sense trip events. CRC/Scan periodically verifies that the charge algorithm in Flash is intact, and PWM controls a synchronous buck or flyback converter with CWG providing complementary gate drive. The -40C to +125C temperature rating and 5 V-tolerant I/O let the same design work for Li-ion packs, lead-acid backup units and super-cap modules without redesign.
Được đề xuất
Security and Access Control Panel
Security keypads, magnetic-door controllers and access panels use the PIC18F26K40-E/MLVAO's 5 V-tolerant I/O to read 4x4 keypad matrices and Wiegand card readers directly. CRC/Scan and the Windowed WWDT meet basic functional-safety expectations for alarm panels, and the 1 KB EEPROM stores encrypted credential records without an external memory IC. The 28-QFN (ML) keeps the PCB compact for in-wall enclosures, and XLP allows battery-backed operation during AC power loss.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F26K40-E/MLVAO — 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 | PIC18F26K40-E/ML | PIC18F26K40T-E/MLVAO | PIC18F46K40-I/ML | PIC18F26K22-E/ML | PIC18F25K42-E/ML | PIC18F26Q43-I/ML |
|---|---|---|---|---|---|---|---|
| Package | 28-pin QFN (ML, 6x6 mm) | 28-pin QFN (ML, 6x6 mm) - same | 28-pin QFN (ML, 6x6 mm) - same | 28-pin QFN (ML, 6x6 mm) - same | 28-pin QFN (ML, 6x6 mm) - same | 28-pin QFN (ML, 6x6 mm) - same | 28-pin QFN (ML, 6x6 mm) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Program Flash | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB | 32 KB | 64 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB | 2 KB | 4 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 256 B | 1 KB |
| ADC | 10-bit ADC2 (Computation) | 10-bit ADC2 | 10-bit ADC2 | 10-bit ADC2 | 10-bit ADC (no computation) | 12-bit ADC2 | 12-bit ADC2 |
| CWG / HLT / CRC-Scan | Yes / Yes / Yes | Yes / Yes / Yes | Yes / Yes / Yes | Yes / Yes / Yes | No / No / No | Yes / Yes / Yes | Yes / Yes / Yes |
| Temperature Range | -40C to +125C (Extended) | -40C to +125C | -40C to +125C | -40C to +85C (Industrial) | -40C to +125C | -40C to +125C | -40C to +85C |
| Unit Price (USD, qty 1) | 2.85 | 2.80 | 2.85 | 3.10 | 2.70 | 2.60 | 2.75 |
Bảo phân biệt quan trọng
- Full CIP peripheral integration at the lowest power (vsPIC18F26K22-E/ML)
- Extended -40C to +125C temperature grade (vsPIC18F46K40-I/ML)
- Drop-in footprint compatibility with newer Q43 family (vsPIC18F26Q43-I/ML)
Ghi chú thiết kế
Decouple VDD and AVDD separately with a 100 nF ceramic cap placed within 3 mm of each supply pin and a bulk 1 uF low-ESR ceramic shared with the digital rail. Tie AVSS to VSS at a single point under the IC to avoid ground-loop noise coupling into the 10-bit ADC2 - per the Microchip K40 family PCB guidelines. For battery designs, leverage the XLP sleep modes (DTM/doze/idle) and gate the ADC2 sample rate with the FVR-ready interrupt to drop average current below 50 nA between measurements.
Estimated: the QFN ML package theta_JA is approximately 35 C/W on a 4-layer JEDEC test board. At maximum CPU activity at 64 MHz the part dissipates well under 100 mW, so the thermal rise is below 5 C in normal use. The exposed pad (EP) must be soldered to a continuous ground copper pour with thermal vias to keep junction temperature inside the -40C to +125C window at high ambient.
The 28-pin QFN (ML) land pattern requires a 0.4 mm pitch with a center pad of roughly 4.5 mm x 4.5 mm per Microchip package drawings. Use NSMD pads with solder mask defined openings for the side leads and a windowed solder-mask opening over the EP for reliable reflow. Keep the ICSP PGECx/PGEDx pair (RB6/RB7) routed with no series resistors and within 100 mm of the programming header for clean ICD debug operation.
Do not leave unused I/O floating - configure them as outputs low or enable the internal weak pull-up to avoid parasitic current paths. Remember that the K40's ADC2 channel mapping differs slightly from older K22 parts; cross-check ANSEL and ADPCH registers when migrating legacy code. Finally, the WWDT must be enabled in software and configured with a window to gain functional-safety benefit - enabling it without a window defeats most of its diagnostic value.
Thông tin tuân thủ
RoHS and lead-free status confirmed by Microchip product page. AEC-Q100 status not explicitly listed for the -E/-MLVAO variant on the public product page; confirm with Microchip for automotive qualification needs.
