PIC18LF27K40T-I/ML - 128KB Flash 8-bit XLP MCU | Microchip
N.º da peça: PIC18LF27K40T-I/ML ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $2.93 | $2,93 |
| 10 | $2.74 | $27,40 |
| 100 | $2.41 | $241,00 |
| 500 | $2.18 | $1.090,00 |
| 1.000 | $1.96 | $1.960,00 |
| 1.600 | $1.85 | $2.960,00 |
PIC18LF27K40T-I/ML Visão geral
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash), volatile working memory (RAM), EEPROM for data retention, and a rich peripheral set into one IC. The PIC18F/LF family uses Microchip's enhanced 8-bit modified Harvard architecture, sitting between simple 8-bit controllers (PIC10/12/16) and 16-bit dsPIC devices in Microchip's lineup. The XLP (eXtreme Low Power) technology branch of PIC18 specifically targets battery-powered and energy-harvesting designs, where nanoWatt sleep currents and active-mode efficiency determine battery life.
The PIC18LF27K40T-I/ML operates from 1.8 V to 3.6 V, distinguishing the LF (low-voltage F) variant from the standard F variant that runs up to 5.5 V. Core Independent Peripherals (CIPs) such as CWG, CRC/Memory Scan, and ZCD can execute complex timing, signal generation, and safety functions in hardware without CPU intervention, reducing firmware complexity and power consumption. PPS allows most digital peripherals to be remapped to a wide range of I/O pins, simplifying PCB routing and BOM reuse across board variants.
Typical applications include IoT sensor nodes, battery-powered instrumentation, low-energy wireless controllers (LoRa, Sub-GHz, BLE front-ends), HVAC and building automation, white-goods user interfaces, and general-purpose embedded control. The combination of 128 KB Flash and PPS also makes the part well-suited to designs where firmware is still evolving during product validation.
When designing with the LF variant, ensure the supply stays within the 1.8 V to 3.6 V window - the part will not survive a 5 V input. A 0.1 uF decoupling capacitor placed within a few millimeters of the VDD pin is required, plus a bulk capacitor on the analog supply if the ADC2 is in use. Watch the QFN exposed pad: it must be soldered to the ground plane for thermal dissipation and electrical reference.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, application notes, and PCB design considerations beyond the raw datasheet summary, giving an engineer a complete decision snapshot for a 28-pin VQFN PIC18 design.
Alternativas drop-in para PIC18LF27K40T-I/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 PIC18LF27K40T-I/ML (mesmo formato e footprint) — diferindo em ADC, Operating Temperature, Package, Core, I/O Pins.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC18F27K40T-I/ML
✅ Drop-In✓ Em estoque
$1.95 / unidade
Ver ficha técnica →PIC18LF27K40-I/ML
✅ Drop-In✓ Em estoque
$1.18 / unidade
Ver ficha técnica →PIC18LF26K40T-I/ML
✅ Drop-In✓ Em estoque
$1.39 / unidade
Ver ficha técnica →PIC18LF27K40-E/ML
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18LF27K40T-I/ML Classificações máximas e características elétricas
| Core | PIC18 8-bit RISC |
| Family | PIC18 XLP |
| Program Memory (Flash) | 128 KB (64K x 16) |
| Data Memory (RAM) | 4 KB |
| Data EEPROM | 1 KB |
| Maximum CPU Frequency | 64 MHz |
| Operating Voltage Range | 1.8 V to 3.6 V |
| I/O Pins | 25 |
| ADC | 10-bit ADC2 with Hardware CVD |
| DAC | 5-bit DAC |
| Comparators | 2 |
| PWM / CCP | CCP/PWM channels |
| Communication | EUSART, SPI, I2C |
| Encapsulamento | 28-QFN (VQFN, 6x6 mm) |
| Tipo de montagem | Surface Mount |
| Temperatura de operação | -40C to +85C (Industrial, 'I') |
| Packing Media | Tape and Reel (1600/reel) |
| Special Features | CWG, WWDT, CRC/Memory Scan, ZCD, PPS, HLT |
| Status RoHS | Compliant |
| Country of Origin | Thailand |
Configuração de pinos do PIC18LF27K40T-I/ML
| Pino 1 | RA2 — Port A bit 2 (digital I/O, analog input) |
| Pino 2 | RA3 — Port A bit 3 (digital I/O, analog input) |
| Pino 3 | RA4 — Port A bit 4 (digital I/O, analog input) |
| Pino 4 | RA5 — Port A bit 5 (digital I/O, analog input) |
| Pino 5 | RA6 — Port A bit 6 (digital I/O, analog input, OSC2) |
| Pino 6 | RA7 — Port A bit 7 (digital I/O, analog input, OSC1) |
| Pino 7 | VSS — Ground reference |
| Pino 8 | VDD — Positive supply (1.8 V to 3.6 V) |
| Pino 9 | RA0 — Port A bit 0 (digital I/O, analog input) |
| Pino 10 | RA1 — Port A bit 1 (digital I/O, analog input) |
| Pino 11 | RB0 — Port B bit 0 (digital I/O, analog input, interrupt-on-change) |
| Pino 12 | RB1 — Port B bit 1 (digital I/O, analog input, interrupt-on-change) |
| Pino 13 | RB2 — Port B bit 2 (digital I/O, analog input, interrupt-on-change) |
| Pino 14 | RB3 — Port B bit 3 (digital I/O, analog input, interrupt-on-change) |
| Pino 15 | RB4 — Port B bit 4 (digital I/O, analog input, interrupt-on-change) |
| Pino 16 | RB5 — Port B bit 5 (digital I/O, analog input, interrupt-on-change) |
| Pino 17 | RB6 — Port B bit 6 (digital I/O, ICDCLK) |
| Pino 18 | RB7 — Port B bit 7 (digital I/O, ICDDAT) |
| Pino 19 | VSS — Ground reference (digital) |
| Pino 20 | VDD — Positive supply (digital core) |
| Pino 21 | RC0 — Port C bit 0 (digital I/O, analog input) |
| Pino 22 | RC1 — Port C bit 1 (digital I/O, analog input) |
| Pino 23 | RC2 — Port C bit 2 (digital I/O, analog input) |
| Pino 24 | RC3 — Port C bit 3 (digital I/O, analog input) |
| Pino 25 | RC4 — Port C bit 4 (digital I/O, analog input) |
| Pino 26 | RC5 — Port C bit 5 (digital I/O, analog input) |
| Pino 27 | RC6 — Port C bit 6 (digital I/O, analog input) |
| Pino 28 | RC7 — Port C bit 7 (digital I/O, analog input) |
Aplicações típicas
PIC18LF27K40T-I/ML é adequado para 6 aplicaçãos: IoT Sensor Node Controller, Battery-Powered Instrumentation, HVAC and Building Automation Controls, White Goods and Appliance User Interface, Low-Energy Wireless Front-End, General-Purpose Embedded Control.
IoT Sensor Node Controller
The PIC18LF27K40T-I/ML fits IoT sensor nodes because its XLP nanoWatt technology drives sleep currents into the nA range, while 128 KB Flash holds substantial protocol stacks (LoRaWAN, BLE HCI, MQTT-SN). The 1.8 V-3.6 V supply pairs directly with a Li-ion battery or 3.3 V LDO without a regulator drop-out. Peripheral Pin Select (PPS) lets one MCU design support multiple daughter-card variants without re-spinning the board, reducing time-to-market for IoT OEMs building a product family.
Recomendado
Battery-Powered Instrumentation
Battery-powered instrumentation such as handheld multimeters, dataloggers, and portable environmental monitors benefits from the LF variant's 1.8 V-3.6 V operation on 2xAA or Li-ion chemistries. The 10-bit ADC2 with hardware CVD enables capacitive touch buttons or ratiometric sensor reads without CPU wakeup. Combined with the 5-bit DAC for sensor bias and 2 comparators for threshold detection, the PIC18LF27K40T-I/ML lets designers build a complete instrument frontend on a single 28-QFN.
Recomendado
HVAC and Building Automation Controls
HVAC zone controllers, smart thermostats, and building-automation nodes run on the PIC18LF27K40T-I/ML because of its industrial -40C to +85C temperature range, robust 5V-tolerant I/O (when paired with PIC18F variant), and Core Independent Peripherals (CWG, ZCD, CRC). Zero-Cross Detect (ZCD) simplifies AC line triac driving for thermostats, while CWG generates complementary PWM for motor/valve control without CPU loading. PPS allows flexible pin mapping across multiple HVAC board variants.
Recomendado
White Goods and Appliance User Interface
White-goods front panels (washing machines, dishwashers, microwave ovens) use the PIC18LF27K40T-I/ML for user-interface control with capacitive touch buttons (Hardware CVD), seven-segment or graphical LCD driving via SPI, and motor-control PWM channels. The 128 KB Flash easily holds an LVGL-style graphics library plus state machine firmware. The 28-QFN compact footprint fits behind the front panel, and the industrial temperature range survives the appliance thermal environment.
Recomendado
Low-Energy Wireless Front-End
Low-energy wireless front-ends for Sub-GHz, LoRa, BLE modules, or proprietary RF stacks use the PIC18LF27K40T-I/ML as the host controller because its EUSART/SPI/I2C interfaces directly to common radio transceivers and the LF variant runs at the same 1.8 V-3.6 V level as the radio IC. CRC/Memory Scan hardware verifies firmware integrity at boot, which is essential for wireless security. 25 I/O supports button/scan matrix plus status LED multiplexing for remote-control designs.
Recomendado
General-Purpose Embedded Control
General-purpose embedded controllers such as small motor drivers, sensor hubs, and lighting controllers benefit from the PIC18LF27K40T-I/ML because of its Core Independent Peripherals (CIPs) that handle CWG, CRC/Memory Scan, and Zero-Cross Detect in hardware. Peripheral Pin Select gives layout flexibility for the 25 I/O, letting designers fit the same MCU across multiple product SKUs. The 1.8 V-3.6 V LF range matches modern DC-DC rails without a separate regulator.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC18LF27K40T-I/ML — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC18F27K40T-I/ML | PIC18LF27K40-I/ML | PIC18LF26K40T-I/ML |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-QFN (6x6 mm) | 28-QFN (6x6 mm) - same | 28-QFN (6x6 mm) - same | 28-QFN (6x6 mm) - same |
| Flash | 128 KB | 128 KB | 128 KB | 64 KB (-50%) |
| RAM | 4 KB | 4 KB | 4 KB | 3.5 KB (-12.5%) |
| Operating Voltage | 1.8 V to 3.6 V | 1.8 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| I/O Pins | 25 | 25 | 25 | 25 |
| ADC | 10-bit ADC2 | 10-bit ADC2 | 10-bit ADC2 | 10-bit ADC2 |
| Temperature Range | -40C to +85C (I) | -40C to +85C | -40C to +85C | -40C to +85C |
Principais diferenciais
- Larger Flash and RAM than K26 sibling (vs PIC18LF26K40T-I/ML)
- Low-voltage LF variant for 1.8 V-3.6 V rails (vs PIC18F27K40T-I/ML)
- Industrial -40C to +85C temperature range (vs PIC18LF27K40-E/ML)
Notas de projeto
Place a 0.1 uF decoupling capacitor within 3 mm of the VDD pin (pin 8 and pin 20) and a 1 uF bulk capacitor on the analog VDD rail if the ADC2 is enabled. The PIC18LF27K40T-I/ML will not tolerate voltages above 3.6 V; if the upstream rail can overshoot during hot-plug events, add a TVS diode or RC snubber. Sleep current is in the nA range with XLP nanoWatt mode, but active current at 64 MHz can reach 15 mA - ensure the source impedance stays below 0.5 ohm to avoid VDD sag.
The QFN exposed thermal pad (EP, pin 29 typically) MUST be soldered to the ground plane, both for thermal dissipation (theta_JA improves from ~80 C/W to ~35 C/W) and for electrical reference. Use at least 4 thermal vias in the EP land pattern to conduct heat to the inner ground plane. Keep the EP clearance to signal traces at least 0.2 mm to prevent solder wicking. Place a 0.1 uF cap within 3 mm of VDD, and keep analog traces away from switching signals crossing the EP.
Take advantage of Peripheral Pin Select (PPS) to route the SPI, I2C, and UART signals to convenient pins, but note that PPS remapping introduces a small propagation delay (typically 1-2 ns) and may require the peripheral to be momentarily disabled during remap. Crystal traces (RA6/RA7 if used) must be short (<10 mm), surrounded by a ground guard, and kept away from PWM outputs to avoid coupling. The analog input traces should be guarded by analog ground (AGND) on both sides for ADC accuracy.
Do not exceed 3.6 V on VDD - the LF variant will suffer Flash damage above this limit. Always configure the brown-out reset (BOR) to a value within the operating range (e.g., 1.8 V minimum). When using the ADC2 with hardware CVD for capacitive touch, calibrate the CVD reference at production to compensate for board parasitic capacitance. The 'T' suffix indicates tape-and-reel packing; if your prototype needs cut-tape, order the non-T variant (PIC18LF27K40-I/ML) instead. Always include a 10 kohm pull-up on MCLR (pin 1 equivalent) for reliable reset.
Informações de conformidade
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - the K40 family targets industrial/consumer, not automotive. For automotive, Microchip recommends dsPIC33A or PIC18-Q1 variants.
