PIC18F27K40-I/ML - 8-Bit 64MHz 128KB Flash MCU | Microchip
N.º da peça: PIC18F27K40-I/ML ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $2.85 | $2,85 |
| 10 | $2.55 | $25,50 |
| 100 | $2.21 | $221,00 |
| 500 | $1.95 | $975,00 |
| 1.000 | $1.74 | $1.740,00 |
PIC18F27K40-I/ML Visão geral
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, program Flash, and peripherals around an 8-bit data bus. PIC18 K40 devices sit in the hierarchy PIC18F -> 8-bit PIC microcontroller -> PIC MCU family -> embedded microcontroller, balancing low power (XLP technology) with rich peripherals suited to general-purpose 5V applications. This category encompasses devices used where deterministic behavior, simple toolchains, and low system cost outweigh the need for 32-bit throughput.
Key features include 128 KB Flash with self-programmability, 3.7 KB RAM, 1 KB EEPROM, 24 analog-capable digital I/O pins, a 10-bit ADC, up to four PWM outputs, four 8-bit timers plus 3 16-bit timers, and configurable logic cells. The XLP Sleep mode draws extremely low current, enabling battery-powered designs. The 5V-tolerant I/O and wide 2.3V-5.5V supply range cover industrial and consumer rail requirements.
Architecturally, the device employs a C-compiler-optimized RISC core with hardware multiply and a 31-level hardware stack. Bus speed scales up to 64 MHz via a 16 MHz internal oscillator plus 4x PLL, achieving 16 MIPS throughput. The 14-bit instruction set remains compatible with prior PIC18 code, easing migration from older 8-bit designs.
Typical applications include battery-powered sensor hubs, home appliance controls, automotive accessory modules, industrial HMI panels, motor control loops, and USB-to-UART bridges. The combination of XLP low power, large Flash, and CIP peripherals makes it appropriate for designers migrating from legacy PIC16 to PIC18 K40 silicon.
When designing, ensure the exposed thermal pad on the 28-QFN package is soldered to a properly sized ground copper pour for thermal dissipation; otherwise expect elevated junction temperatures at high ambient. Use Microchip's MPLAB X IDE with the XC8 compiler for code generation and debugging via ICSP.
This page consolidates distributor pricing, drop-in alternative mapping, and design notes not found in a single resource - supporting both engineer evaluation and procurement decisions as of 2026-09-27.
Alternativas drop-in para PIC18F27K40-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 PIC18F27K40-I/ML (mesmo formato e footprint) — diferindo em Package, ADC, Program Memory (Flash), Operating Temperature, Core Architecture.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC18F27K42-I/ML
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$1.85 / unidade
Ver ficha técnica →PIC18F26K40-I/ML
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$1.78 / unidade
Ver ficha técnica →PIC18F27K40T-I/ML
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$1.95 / unidade
Ver ficha técnica →PIC18F27K40-I/SP
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$2.61 / unidade
Ver ficha técnica →PIC18F26Q43-I/SS
✅ Drop-In✓ Em estoque
$1.38 / unidade
Ver ficha técnica →PIC18F27K40-I/ML Classificações máximas e características elétricas
| Core Architecture | PIC18 8-bit RISC |
| Program Memory (Flash) | 128 KB (64K x 16) |
| EEPROM | 1 KB |
| Maximum CPU Speed | 64 MHz (16 MIPS) |
| Tensão de alimentação | 2.3 V to 5.5 V |
| I/O Pins | 24 |
| ADC | 10-bit |
| Timers | 4 x 8-bit + 3 x 16-bit |
| PWM Channels | Up to 4 |
| Temperatura de operação | -40 C to +85 C (Industrial - I) |
| Encapsulamento | 28-QFN (6x6 mm) with Exposed Pad (ML) |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
Configuração de pinos do PIC18F27K40-I/ML
| Pino 1 | RA2 — Digital I/O / analog-capable |
| Pino 2 | RA3 — Digital I/O / analog-capable |
| Pino 3 | RA4 — Digital I/O / analog-capable |
| Pino 4 | RA5 — Digital I/O / analog-capable |
| Pino 5 | VDD — Positive power supply 2.3V-5.5V |
| Pino 6 | VSS — Ground reference |
| Pino 7 | OSC1/CLKI/RA7 — Crystal input or digital I/O |
| Pino 8 | OSC2/CLKO/RA6 — Crystal output or digital I/O |
| Pino 9 | RC0 — Digital I/O |
| Pino 10 | RC1 — Digital I/O |
| Pino 11 | RC2 — Digital I/O |
| Pino 12 | RC3 — Digital I/O |
| Pino 13 | RC4 — Digital I/O |
| Pino 14 | RC5 — Digital I/O |
| Pino 15 | RC6 — Digital I/O |
| Pino 16 | RC7 — Digital I/O |
| Pino 17 | RB7 — Digital I/O |
| Pino 18 | RB6 — Digital I/O |
| Pino 19 | RB5 — Digital I/O |
| Pino 20 | RB4 — Digital I/O |
| Pino 21 | RB3 — Digital I/O |
| Pino 22 | RB2 — Digital I/O |
| Pino 23 | RB1 — Digital I/O |
| Pino 24 | RB0 — Digital I/O |
| Pino 25 | VDD — Positive power supply (second rail) |
| Pino 26 | VSS — Ground reference (second rail) |
| Pino 27 | RA0 — Digital I/O / analog-capable / ICD test |
| Pino 28 | RA1 — Digital I/O / analog-capable |
Aplicações típicas
PIC18F27K40-I/ML é adequado para 6 aplicaçãos: Battery-Powered Sensor Hub, Home Appliance Control Panel, Automotive Accessory Module (Body Electronics), Industrial HMI / Display Controller, USB HID Bridge / UART Translator, SMPS / LED Lighting Controller.
Battery-Powered Sensor Hub
The PIC18F27K40-I/ML suits battery-powered sensor hubs because its XLP Sleep current draws sub-uA power while the CLC handles event triggering without waking the CPU. With 128 KB Flash the device can support multi-protocol sensor stacks including SPI-driven accelerometers and I2C temperature sensors through a single chip. Its 2.3-5.5V supply range accepts Li-ion, coin-cell, and energy-harvested sources. The 64 MHz CPU clock lets you process sensor data within short active windows to return quickly to sleep, maximizing average battery life in remote IoT edge nodes.
Recomendado
Home Appliance Control Panel
For washing machine, dishwasher, or microwave control panels, the PIC18F27K40-I/ML provides 24 I/O to drive seven-segment displays, button matrices, and triac outputs through the CWG peripheral. The 10-bit ADC reads sensor inputs for water level or humidity measurements with adequate resolution. With 128 KB Flash the firmware can include multi-language UI strings and complex state machines. The 5V-tolerant I/O interfaces directly with legacy appliance drivers without level shifting.
Recomendado
Automotive Accessory Module (Body Electronics)
In automotive interior accessory modules such as seat controllers or HVAC panel interfaces, the PIC18F27K40-I/ML serves through Microchip's automotive-grade PIC18F27K40-E/ML extended-temperature variant. The CWG peripheral generates complementary PWM for LED backlight dimming with programmable dead-band. The 16-bit timers provide accurate PWM for motor control of small fans. Note that the -I grade is not AEC-Q100 qualified; designers targeting AEC-Q100 should select the -E extended or -V automotive qualified variants from the same K40 family.
Recomendado
Industrial HMI / Display Controller
In industrial HMI panels the PIC18F27K40-I/ML drives character or small graphic LCDs through SPI while its PWM peripherals control backlight brightness. The CRC module validates data integrity on communication lines, critical in electrically noisy industrial environments. With 128 KB Flash, designers can implement full menu systems and modbus RTU protocol stacks. The hardware CIPs minimize firmware complexity by handling communication timing autonomously, freeing CPU cycles for display refresh and user input handling.
Recomendado
USB HID Bridge / UART Translator
Although the PIC18F27K40-I/ML lacks native USB, the device fits well as a UART-to-SPI/I2C translator that pairs with an external USB-to-UART bridge. Its 128 KB Flash accommodates HID descriptor tables and command parsers when used as an embedded host. The hardware CLC can pre-process incoming data streams without CPU wake-up. For pure USB-MCU designs, the Microchip PIC18F25K50 / PIC18F27J53 family provides native USB in the same 28-QFN footprint.
Recomendado
SMPS / LED Lighting Controller
In digital LED controllers the PIC18F27K40-I/ML generates WS2812-style timing via DMA-assisted SPI or through the CWG peripheral, offloading pulse generation from the CPU. The 16-bit timer feeds PWM outputs to drive LED strings with high resolution dimming. Its 5V-tolerant I/O allows direct interfacing with high-brightness LED drivers. The hardware CRC validates long LED data streams in real time. With 128 KB Flash and 64 MIPS throughput, the device manages hundreds of LEDs with smooth color transitions.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC18F27K40-I/ML — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC18F27K42-I/ML | PIC18F26K40-I/ML | PIC18F27K40T-I/ML | PIC18F26Q43-I/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-QFN (6x6) | 28-QFN (6x6) - same | 28-QFN (6x6) - same | 28-QFN (6x6) - same | 28-SSOP - different |
| Flash Memory | 128 KB | 128 KB | 64 KB (-50%) | 128 KB | 64 KB (-50%) |
| Max CPU Speed | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS |
| Core Family | PIC18 K40 | PIC18 K42 | PIC18 K40 | PIC18 K40 | PIC18 Q43 |
| Supply Voltage | 2.3V to 5.5V | 2.3V to 5.5V | 2.3V to 5.5V | 2.3V to 5.5V | 2.3V to 5.5V |
| AEC-Q100 Qualified | No (-I industrial grade) | No | No | No | No |
Principais diferenciais
- Core Independent Peripherals (CIPs) (vs PIC16F1825)
- XLP eXtreme Low Power technology (vs PIC18F26K22)
- Large program memory within 28-QFN (vs PIC18F25K50)
Notas de projeto
The 28-QFN (6x6 mm) package with exposed pad (ML) requires the central thermal pad to be soldered to a ground copper pour for thermal dissipation. Per the Microchip datasheet, recommended minimum copper area is 30 mm squared on the top layer with at least 4 thermal vias connecting to inner planes. Without adequate thermal connection the device may throttle or fail under heavy ADC sampling and constant PWM output. Estimated: at 50 MHz CPU + 5 peripherals active continuously at 5V, internal dissipation remains well under 200 mW but junction temperature rise depends heavily on copper layout.
Place the 100 nF bypass capacitor within 5 mm of each VDD pin, with the shortest possible trace to VSS. The PIC18F27K40 has dual VDD/VSS pairs (pins 5/6 and 25/26), and each requires its own local decoupling. Use a 10 uF bulk capacitor near the IC. For ADC accuracy, route analog inputs (RA0-RA5) perpendicular to high-frequency traces and provide a separate AVSS connection at pin 6 when used. Reference Microchip application note AN2510 for optimal MCU PCB layout techniques.
Do not rely on the internal oscillator for USB or CAN communication due to USB clock tolerance limits exceeding 0.25 percent. Use an external crystal for any timing-sensitive communication protocol. When migrating from older PIC18F devices, note that the K40 family introduces CLC and CWG peripherals with new register names; existing PIC18F code must re-map interrupt vectors. Also note the configuration words are different from legacy PIC18F and require fresh settings in the IDE.
Enable XLP Sleep modes via the PMD and PWMEN registers before deployment in battery applications. The PIC18F27K40's Idle and Sleep current drops to nanoamp range with peripherals disabled. Estimated: at 3V supply with all peripherals off, Sleep I/O leakage is typically below 1 uA. Always ground unused I/O via WPU or set them as digital outputs to avoid floating pin current leakage. Use the PPS (Peripheral Pin Select) module carefully - misconfiguring outputs to inactive PPS pins leaves outputs floating.
Informações de conformidade
RoHS compliant per Microchip product page. Industrial -I grade is not AEC-Q100 qualified; for automotive use consider the -E extended or dedicated AEC-Q100 K40 variants.
