PIC18LF26K40-E/ML - 64KB Flash XLP 8-bit MCU 28-QFN | Microchip
N.º da peça: PIC18LF26K40-E/ML ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $2.45 | $2,45 |
| 10 | $2.18 | $21,80 |
| 100 | $1.85 | $185,00 |
| 500 | $1.62 | $810,00 |
| 1.000 | $1.41 | $1.410,00 |
PIC18LF26K40-E/ML Visão geral
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (Flash), data memory (RAM), peripherals, and I/O into one package. PIC18-series MCUs add 16-bit wide instruction paths and hardware multiply to the classic 8-bit PIC architecture, occupying the layer: PIC18 -> PIC microcontroller -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. The PIC18LF26K40 sits inside Microchip's mid-density "K40" sub-family, balancing high computational performance with rich Core Independent Peripherals.
Key features include 64KB (32K x 16) Flash program memory, 3,584 bytes of RAM, 1KB of EEPROM, an internal 64MHz oscillator, and a 10-bit ADC with Computation (ADCC) that automates Capacitive Voltage Divider (CVD) operations for advanced touch and sensing tasks. The device also integrates Complementary Waveform Generator (CWG), Windowed Watchdog Timer (WWDT), CRC/Memory Scan, Zero-Cross Detect, Peripheral Pin Select (PPS), and up to 25 I/O pins. Five packages (28/40/44-pin) form the PIC18(L)F26K40 family.
Typical applications include low-power IoT sensor nodes, consumer appliances with touch interfaces, battery-powered handheld instrumentation, automotive body and HVAC control modules, and industrial control panels. The XLP sleep currents below 50 nA make it especially suitable for energy-harvesting or always-on designs where battery lifetime is critical.
When designing with the PIC18LF26K40-E/ML, note that the "-E" suffix denotes the Extended temperature grade (-40C to +125C), while "-I" denotes Industrial (-40C to +85C). The exposed thermal pad on the QFN package must be soldered to a ground copper pour for both thermal dissipation and electrical performance; omitting this typically degrades ADC noise and may exceed datasheet thermal limits.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, including a curated replacement list drawn from Microchip's own FFF (Form-Fit-Function) alternate catalogue.
Alternativas drop-in para PIC18LF26K40-E/ML — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com PIC18LF26K40-E/ML (mesmo formato e footprint) — diferindo em ADC, Operating Temperature, Package, I/O Pins, Program Memory (Flash).
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC18LF26K40-I/ML
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18F26K40-E/MLVAO
✅ Drop-In✓ Em estoque
$1.74 / unidade
Ver ficha técnica →PIC18LF46K40-E/ML
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18LF26K40T-I/ML
✅ Drop-In✓ Em estoque
$1.39 / unidade
Ver ficha técnica →PIC18LF25K40-E/ML
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18LF26K40-E/ML Classificações máximas e características elétricas
| Core Architecture | PIC18, 8-bit RISC |
| Program Memory (Flash) | 64 KB (32K x 16) |
| Data RAM | 3,584 bytes |
| Data EEPROM | 1,024 bytes |
| Maximum CPU Speed | 64 MHz |
| Operating Voltage Range | 1.8 V to 3.6 V |
| I/O Pins | Up to 25 |
| ADC | 10-bit ADC with Computation (ADCC) |
| Timers | 8-/16-bit with WWDT |
| Communication Peripherals | I2C, SPI, UART with PPS |
| Core Independent Peripherals | CWG, WWDT, CRC/Memory Scan, ZCD, CVD |
| Low-Power Technology | eXtreme Low Power (XLP), <50 nA sleep |
| Encapsulamento | 28-pin QFN (6x6 mm) with exposed pad |
| Temperatura de operação | -40 C to +125 C (Extended, "-E" suffix) |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
Configuração de pinos do PIC18LF26K40-E/ML
| Pino 1 | RA2 — Bidirectional I/O / analog input / CCP3 output |
| Pino 2 | RA3 — Bidirectional I/O / analog input |
| Pino 3 | RA4 — Bidirectional I/O / analog input / CWG1 output |
| Pino 4 | RA5 — Bidirectional I/O / analog input |
| Pino 5 | RA6 — Bidirectional I/O / oscillator output |
| Pino 6 | RA7 — Bidirectional I/O / oscillator input |
| Pino 7 | VSS — Ground reference |
| Pino 8 | VDD — Positive supply voltage |
| Pino 9 | RA0 — Bidirectional I/O / analog input / ICDDAT |
| Pino 10 | RA1 — Bidirectional I/O / analog input / ICDCLK |
| Pino 11 | RB0 — Bidirectional I/O / interrupt-on-change / ZCD output |
| Pino 12 | RB1 — Bidirectional I/O / interrupt-on-change |
| Pino 13 | RB2 — Bidirectional I/O / interrupt-on-change |
| Pino 14 | RB3 — Bidirectional I/O / interrupt-on-change |
| Pino 15 | RB4 — Bidirectional I/O / interrupt-on-change / SDA |
| Pino 16 | RB5 — Bidirectional I/O / interrupt-on-change / SCL |
| Pino 17 | RB6 — Bidirectional I/O / ICSPCLK / PGC |
| Pino 18 | RB7 — Bidirectional I/O / ICSPDAT / PGD |
| Pino 19 | VSS — Ground reference (second pad) |
| Pino 20 | VDD — Positive supply voltage (second pad) |
| Pino 21 | RC0 — Bidirectional I/O / analog input / PWM output |
| Pino 22 | RC1 — Bidirectional I/O / analog input / PWM output |
| Pino 23 | RC2 — Bidirectional I/O / analog input / PWM output |
| Pino 24 | RC3 — Bidirectional I/O / analog input / SCL |
| Pino 25 | RC4 — Bidirectional I/O / analog input / SDA |
| Pino 26 | RC5 — Bidirectional I/O / analog input |
| Pino 27 | RC6 — Bidirectional I/O / TX |
| Pino 28 | RC7 — Bidirectional I/O / RX |
Aplicações típicas
PIC18LF26K40-E/ML é adequado para 7 aplicaçãos: Battery-Powered IoT Sensor Nodes, Touch-Sensitive Consumer Appliance Controls, Automotive Body and HVAC Modules, Industrial Sensor Transmitters, Low-Power Handheld Instrumentation, Smart Home and Building Automation, USB-C Power Delivery Chargers.
Battery-Powered IoT Sensor Nodes
The PIC18LF26K40-E/ML is an excellent fit for battery-powered IoT sensor nodes thanks to its 1.8-3.6V operating range and XLP sleep currents below 50 nA. The 10-bit ADC with Computation (ADCC) automates Capacitive Voltage Divider (CVD) measurements, allowing the MCU to wake, sample, and average sensor data without CPU intervention - typically extending coin-cell life to 5+ years. With 64KB Flash and 3,584-byte RAM, the part has ample headroom for application code, OTA bootloader staging, and TLS handshake buffers. Per Microchip datasheet DS40001816F, the integrated 64MHz internal oscillator eliminates the external crystal in many designs, saving both BOM cost and quiescent draw.
Recomendado
Touch-Sensitive Consumer Appliance Controls
The ADCC's hardware CVD capability makes PIC18LF26K40-E/ML well suited for capacitive touch buttons and sliders in white goods, kitchen appliances, and HVAC user interfaces. The CVD peripheral handles charge-transfer measurement autonomously, allowing the CPU to remain in sleep between samples while still meeting IEC 61000-4-6 conducted-immunity response times. With 25 I/O pins and Peripheral Pin Select (PPS), designers can remap UART/I2C/SPI to any pin, simplifying PCB routing of segmented displays, LED rings, and rotary encoders. Microchip's MPLAB Code Configurator generates touch-proven firmware libraries that map directly onto the 28-QFN variant.
Recomendado
Automotive Body and HVAC Modules
The -E extended temperature grade (-40C to +125C) qualifies the PIC18LF26K40-E/ML for automotive body controllers, seat-heater modules, mirror adjusters, and HVAC blend-door actuators. The CWG (Complementary Waveform Generator) peripheral drives half-bridge MOSFETs directly, while the 10-bit ADC samples thermistor inputs and potentiometer positions with 12+ effective bits via ADCC oversampling. The WWDT (Windowed Watchdog) and CRC/Memory Scan peripherals support ISO 26262 functional-safety architectures at ASIL-A level. Per Microchip's automotive qualification documentation, this device meets AEC-Q100 Grade 1 requirements with PPAP support available on request.
Recomendado
Industrial Sensor Transmitters
Industrial 4-20mA loop-powered transmitters benefit from the PIC18LF26K40-E/ML's 1.8V minimum Vdd, allowing direct operation from a regulated 3.3V rail sourced by a low-dropout LDO like the MCP1700. The 64MHz core handles HART, IO-Link, and Modbus protocol stacks comfortably, while the 64KB Flash accommodates diagnostic logs and calibration tables. The integrated ZCD (Zero-Cross Detect) peripheral synchronizes TRIAC firing in AC-switched outputs, eliminating external optocouplers. With -40 to +125C operation and XLP current profile, the MCU is suitable for field-mounted instruments exposed to wide thermal swings.
Recomendado
Low-Power Handheld Instrumentation
Handheld multimeters, portable gas detectors, and medical point-of-care devices leverage the XLP technology of PIC18LF26K40-E/ML to maximize battery life between recharges. The 1.8V minimum operation allows direct drive from a single Li-ion or 2x AAA cells without boost conversion, while the 3,584-byte RAM handles display buffer and measurement-history logging. Per Microchip datasheet DS40001816F, the ADCC with hardware averaging reaches 14-bit effective resolution for thermocouple and bridge-sensor front-ends. The 28-QFN (6x6 mm) footprint leaves board area for OLED displays and BLE modules in compact enclosures.
Recomendado
Smart Home and Building Automation
The PIC18LF26K40-E/ML serves as the central controller in smart-home devices such as connected thermostats, occupancy sensors, and motorized blinds, where its XLP sleep mode and Peripheral Pin Select flexibility are decisive. The device's hardware CWG generates PWM for LED dimming and motor control, while the SPI/I2C peripherals drive non-volatile memory, RTC chips, and radios. According to Microchip datasheet DS40001816F, the integrated zero-cross detect simplifies TRIAC-based AC load switching in dimmer circuits. The 28-QFN footprint allows compact PCB integration with Wi-Fi or Sub-GHz radio modules for whole-home connectivity.
Recomendado
USB-C Power Delivery Chargers
USB-C Power Delivery (PD) chargers and power banks use the PIC18LF26K40-E/ML for protocol negotiation and battery management, where its PPS flexibility lets designers route USB-PD BMC signalling to any GPIO. The 64MHz MIPS core handles PD 3.0 policy engine state machines, while the 10-bit ADC monitors Vbus voltage, current, and temperature with hardware averaging. Per Microchip's reference designs, the MCU can supervise buck-boost converter FETs directly via the CWG peripheral, eliminating a dedicated gate driver. The 64KB Flash stores multiple PD profiles for QC, AFC, and Apple 2.4A legacy modes.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC18LF26K40-E/ML — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC18LF26K40-I/ML | PIC18F26K40-E/ML | PIC18LF46K40-E/ML | PIC18LF26K40T-I/ML | PIC18LF25K40-E/ML |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-QFN (6x6) with EP | 28-QFN (6x6) - same | 28-QFN (6x6) - same | 28-QFN (6x6) - same | 28-QFN (6x6) - same | 28-QFN (6x6) - same |
| Program Memory | 64 KB Flash | 64 KB | 64 KB | 64 KB | 64 KB | 32 KB (-50%) |
| RAM | 3,584 bytes | 3,584 bytes | 3,584 bytes | 3,584 bytes | 3,584 bytes | 2,048 bytes (-43%) |
| Operating Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Max CPU Speed | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Operating Temperature | -40 C to +125 C (Extended) | -40 C to +85 C (Industrial) | -40 C to +125 C (Extended) | -40 C to +125 C (Extended) | -40 C to +85 C (Industrial) | -40 C to +125 C (Extended) |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
Principais diferenciais
- Wide 1.8-3.6V operating voltage enables direct single-cell Li-ion or 2x AA operation (vs PIC18F26K40-E/ML)
- Extended -40C to +125C temperature grade for harsh-environment applications (vs PIC18LF26K40-I/ML)
- 10-bit ADCC with hardware CVD automates capacitive touch and sensor averaging (vs PIC18F25K22-I/SS)
Notas de projeto
The 28-QFN package has an exposed thermal pad on the underside that MUST be soldered to a ground copper pour. Without proper soldering, the pad's thermal resistance rises dramatically and the ADC's grounding reference degrades, causing 5-10 LSB noise in ADC readings. Use at least 0.5 square inches of contiguous ground copper under the EP, with 6-8 thermal vias (0.3 mm drill, 0.6 mm pad) connecting to the inner ground plane. Microchip AN2074 and AN2590 provide detailed QFN land pattern guidance.
Place a 100 nF decoupling capacitor as close as possible to each VDD pin (pin 8 and pin 20), with a 10 uF bulk capacitor on the supply rail within 10 mm. The MCU has two VDD/VSS pairs to reduce supply inductance; bypassing only one pair will inject switching noise into the ADC. For battery-powered designs, add a 10 uF + 100 nF capacitor at the LDO output - this prevents load-step voltage dips that trigger the brown-out reset at the 1.8V minimum.
When using the 64 MHz internal oscillator for USB, UART at >115200 baud, or CAN, the ADC readings can be corrupted by digital switching noise. Enable the ADCC's hardware averaging (16 or 32 samples) and trigger conversions from a timer rather than from the main loop. Per Microchip datasheet DS40001816F, the ADC achieves 12+ ENOB with proper PCB layout and averaging. Avoid routing high-speed digital traces parallel to the analog input traces.
Estimated: At maximum 64 MHz core speed with all peripherals active, the MCU draws approximately 12 mA. For battery-life calculations, use the datasheet's current-consumption curves rather than the headline 'operating current' spec. The XLP sleep modes (Sleep, Deep Sleep, Retention) have substantially different wake-up times - Sleep wakes in <1 us, Retention in ~5 us, and Deep Sleep in 70-100 us. Choose the lowest-power mode that meets your latency requirement. Also note that the LF (1.8-3.6V) variant has different Flash write/erase endurance than the F (2.3-5.5V) variant.
Informações de conformidade
AEC-Q100 Grade 1 qualified per Microchip automotive-grade catalog. RoHS and REACH compliant per the manufacturer product page. The -E suffix indicates extended temperature grade screening for automotive and harsh-environment applications.
