PIC18F45K40-I/PT - 8-Bit 64MHz 32KB Flash XLP MCU 44-TQFP | Microchip
N.º da peça: PIC18F45K40-I/PT ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $2.95 | $2,95 |
| 10 | $2.71 | $27,10 |
| 100 | $2.35 | $235,00 |
| 500 | $2.07 | $1.035,00 |
| 1.000 | $1.92 | $1.920,00 |
PIC18F45K40-I/PT Visão geral
An 8-bit microcontroller (MCU) is a programmable processor integrating CPU, non-volatile memory (Flash), volatile memory (RAM), and peripherals onto a single silicon die. The PIC18 family is built on a modified Harvard RISC architecture and falls within the broader taxonomy of microcontrollers, which themselves sit under microprocessors and integrated circuits. The K40 sub-family emphasizes XLP (eXtreme Low Power) nanoWatt technology, useful for battery-powered sensor nodes where quiescent current directly governs operational lifetime.
Key features include 64 MHz operation supporting 16 MIPS, up to 36 digital I/O lines with 5V tolerance, a 35-channel 10-bit ADC capable of up to 100 ksps, multiple PWM/CCP/CWG peripherals for motor and power-conversion tasks, two I2C, two SPI, and one UART with LIN support. The wide 2.7V-5.5V supply range covers both single-cell Li-ion and regulated 5V buses, while nanoWatt sleep modes drop quiescent current to as low as 50 nA typical (per manufacturer documentation).
Technically, the device uses an 8-bit RISC core with a hardware multiplier and a configurable 31-level stack, supported by MPLAB X IDE and the XC8 C compiler. The CIP block (CLC, CWG, DSM, SMT, CRC/SCAN, WWDT) lets hardware peripherals operate without CPU intervention, offloading tasks such as PWM generation, signal modulation, and watchdog timing, which frees the core for application logic.
Typical applications include consumer appliance control boards, low-power IoT sensor nodes running on coin-cell or Li-ion batteries, industrial sensor signal conditioning, USB-less human-interface devices such as remote controls and keyboards, automotive body-electronics subsystems (non-safety), and small brushed DC motor control boards using CWG. The 2.7V-5.5V range and 5V-tolerant I/O simplify designs powered directly from regulated 5V rails.
When designing with the PIC18F45K40-I/PT, place a 0.1 uF decoupling capacitor at each VDD pin and a bulk 1 uF-10 uF capacitor near the IC; use MPLAB X IDE with the XC8 compiler; and program in-circuit via ICSP on PGED1/PGEC1 to allow firmware updates without removing the MCU from the board.
This page consolidates distributor pricing, verified drop-in TQFP alternatives from the same Microchip K40 family, and engineering-grade design notes that go beyond what manufacturer pages or basic distributor listings provide, giving procurement and engineering teams a single information-rich reference for the PIC18F45K40-I/PT.
Alternativas drop-in para PIC18F45K40-I/PT — 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 PIC18F45K40-I/PT (mesmo formato e footprint) — diferindo em ADC, Package, Comparators, Core Architecture, Timers.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC18F46K40-I/PT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18F45K22-I/PT
✅ Drop-In✓ Em estoque
$2.65 / unidade
Ver ficha técnica →PIC18F45K42-I/PT
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$1.52 / unidade
Ver ficha técnica →PIC18F4685-I/PT
✅ Drop-In✓ Em estoque
$5.65 / unidade
Ver ficha técnica →PIC18F45K40-I/PT Classificações máximas e características elétricas
| Core Architecture | 8-bit PIC18 RISC (modified Harvard) |
| Maximum CPU Frequency | 64 MHz |
| Instruction Throughput | 16 MIPS |
| Program Memory (Flash) | 32 KB (16K x 16 words) |
| SRAM | 2 KB |
| EEPROM | 256 bytes |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Digital I/O Pins | 36 |
| ADC | 10-bit, up to 35 channels |
| DAC | 5-bit |
| Comparators | Yes |
| PWM Modules | Multiple PWM/CCP, CWG |
| Communication Interfaces | 2x I2C, 2x SPI, 1x UART (LIN-capable) |
| Timers | Multiple 8/16-bit, SMT, WWDT |
| XLP Sleep Current | 50 nA typical (per manufacturer documentation) |
| Encapsulamento | 44-pin TQFP (PT), 10x10 mm |
| Operating Temperature (Industrial) | -40C to +85C |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
| ICSP Programming | Yes (PGED1/PGEC1) |
Configuração de pinos do PIC18F45K40-I/PT
| Pino 1 | MCLR — Master Clear (active-low reset) / ICSP programming voltage input |
| Pino 2 | RA0 — PORTA, bit 0 (digital I/O or analog input) |
| Pino 3 | RA1 — PORTA, bit 1 (digital I/O or analog input) |
| Pino 4 | RA2 — PORTA, bit 2 (digital I/O or analog input) |
| Pino 5 | RA3 — PORTA, bit 3 (digital I/O or analog input) |
| Pino 6 | RA4 — PORTA, bit 4 (digital I/O or analog input) |
| Pino 7 | RA5 — PORTA, bit 5 (digital I/O or analog input) |
| Pino 8 | RA6 — PORTA, bit 6 (digital I/O or analog input) |
| Pino 9 | RA7 — PORTA, bit 7 (digital I/O or analog input) |
| Pino 10 | VSS — Ground reference |
| Pino 11 | VDD — Positive supply input (2.7V to 5.5V) |
| Pino 12 | VSS — Ground reference |
| Pino 13 | OSC1 — External crystal/oscillator input |
| Pino 14 | OSC2 — External crystal/oscillator output |
| Pino 15 | RC0 — PORTC, bit 0 (digital I/O) |
| Pino 16 | RC1 — PORTC, bit 1 (digital I/O) |
| Pino 17 | RC2 — PORTC, bit 2 (digital I/O) |
| Pino 18 | RC3 — PORTC, bit 3 (digital I/O) |
| Pino 19 | RD0 — PORTD, bit 0 (digital I/O) |
| Pino 20 | RD1 — PORTD, bit 1 (digital I/O) |
| Pino 21 | RD2 — PORTD, bit 2 (digital I/O) |
| Pino 22 | RD3 — PORTD, bit 3 (digital I/O) |
| Pino 23 | RC4 — PORTC, bit 4 (digital I/O) |
| Pino 24 | RC5 — PORTC, bit 5 (digital I/O) |
| Pino 25 | RC6 — PORTC, bit 6 (digital I/O) |
| Pino 26 | RC7 — PORTC, bit 7 (digital I/O) |
| Pino 27 | RD4 — PORTD, bit 4 (digital I/O) |
| Pino 28 | RD5 — PORTD, bit 5 (digital I/O) |
| Pino 29 | RD6 — PORTD, bit 6 (digital I/O) |
| Pino 30 | RD7 — PORTD, bit 7 (digital I/O) |
| Pino 31 | VSS — Ground reference |
| Pino 32 | VDD — Positive supply input (2.7V to 5.5V) |
| Pino 33 | RB0 — PORTB, bit 0 (digital I/O; interrupt-on-change) |
| Pino 34 | RB1 — PORTB, bit 1 (digital I/O; interrupt-on-change) |
| Pino 35 | RB2 — PORTB, bit 2 (digital I/O; interrupt-on-change) |
| Pino 36 | RB3 — PORTB, bit 3 (digital I/O; interrupt-on-change) |
| Pino 37 | RB4 — PORTB, bit 4 (digital I/O; interrupt-on-change) |
| Pino 38 | RB5 — PORTB, bit 5 (digital I/O; PGED1 ICSP data) |
| Pino 39 | RB6 — PORTB, bit 6 (digital I/O; PGC1 ICSP clock) |
| Pino 40 | RB7 — PORTB, bit 7 (digital I/o) |
| Pino 41 | RE0 — PORTE, bit 0 (digital I/o) |
| Pino 42 | RE1 — PORTE, bit 1 (digital I/o) |
| Pino 43 | RE2 — PORTE, bit 2 (digital I/o) |
| Pino 44 | RE3 — PORTE, bit 3 (digital I/o) |
Aplicações típicas
PIC18F45K40-I/PT é adequado para 6 aplicaçãos: Consumer Appliance Control Boards, Battery-Powered IoT Sensor Nodes, Industrial Sensor Signal Conditioning, Human-Interface Devices (Keyboards, Remote Controls), Automotive Body Electronics (Non-Safety), Brushed DC Motor Control Boards.
Consumer Appliance Control Boards
The PIC18F45K40-I/PT is well suited to consumer appliance control PCBs such as coffee makers, washing machine UI boards, and microwave user interfaces, where its 36 digital I/O lines directly drive multiplexed LED/7-segment displays, keypads, triac optocouplers, and status indicators without external glue logic. The 64 MHz CPU and 16 MIPS throughput easily run the state machines and timer-driven control loops used for heaters, pumps, and motor sequencing. The 2.7V-5.5V supply works directly from a rectified 5V rail while the XLP nanoWatt sleep mode (50 nA typical) keeps standby consumption at the wall below IEC standby regulations. Inside the appliance design, the device pairs naturally with the MCP23017 I/O expander and a small 24LC256 EEPROM for storing user presets.
Recomendado
Battery-Powered IoT Sensor Nodes
The PIC18F45K40-I/PT's XLP nanoWatt technology and 50 nA typical sleep current make it a strong fit for coin-cell and AA-powered wireless sensor nodes where battery life of several years is required. The 35-channel 10-bit ADC can be time-sliced across multiple analog sensors (temperature, humidity, light, battery voltage) while the SMT and RTCC peripherals run on internal low-power oscillators to wake the core only when a measurement is needed. The 32 KB Flash holds the full sensor stack, periodic sleep/wake scheduler, and an interrupt-driven RF link layer driver; CRCs in hardware (CRC/SCAN) offload integrity checks from the core. Inside the sensor-node design, pair the MCU with a sub-GHz radio such as the SAM R34 or a low-power UART/BLE module and use the WWDT to recover from radio-induced faults.
Recomendado
Industrial Sensor Signal Conditioning
In industrial 4-20 mA, 0-10 V, and bridge sensor signal conditioning front ends, the PIC18F45K40-I/PT combines 35 ADC channels, hardware comparators, and the CWG peripheral in a single -40C to +85C industrial-grade part. The internal ADC2 computation engine performs oversampling, averaging, and threshold detection without using the CPU, leaving MIPS available for HART or Modbus framing at the UART. The wide 2.7-5.5V range supports both 24V-bus derived rails and local 3.3V regulator outputs. Inside the conditioning module, the device typically pairs with an op-amp front end (MCP6V51 zero-drift amplifier) and a digital isolator (ADuM1411) for the loop interface.
Recomendado
Human-Interface Devices (Keyboards, Remote Controls)
USB-less human-interface devices such as wireless keyboards, IR/RF remote controls, and consumer controllers benefit from the PIC18F45K40-I/PT's 36 I/O pins, which scan full 6x18 matrix keypads without external shift registers. The SMT peripheral can decode RC5/RC6 IR protocols in hardware, the CCP/PWM modules drive haptic feedback motors, and the XLP sleep keeps quiescent draw low enough for year-long coin-cell operation. The 64 MHz CPU bandwidth handles simultaneous key de-bouncing, LED animation, and a low-rate UART/SPI RF link. Pair the MCU with a 2.4 GHz transceiver like the AT86RF233 over SPI for wireless keyboards and add a small Li-ion charger (MCP73831) for rechargeable remotes.
Recomendado
Automotive Body Electronics (Non-Safety)
Body-electronics subsystems such as interior lighting controllers, seat-position modules, HVAC blend-door actuators, and door-lock controllers use the PIC18F45K40-I/PT because its 36 5V-tolerant I/O lines interface directly to 12V-derived rails through load drivers, while 5V-tolerant logic eliminates the need for level shifters in mixed 5V/3.3V body modules. The CWG (Complementary Waveform Generator) generates dead-band-corrected gate drives for small MOSFET half-bridges driving blend-door and seat motors. The I function in I/PT provides industrial temperature range; for full AEC-Q100 qualification, Microchip offers K40 variants with the E prefix that share the same silicon and TQFP-44 footprint. Inside the body module, the device typically pairs with an automotive CAN transceiver (MCP2515 + MCP2551) and the LM317 or LM7805 for local rails.
Recomendado
Brushed DC Motor Control Boards
Low-voltage brushed DC motor control boards (small pumps, latches, hobby servos, fans) use the PIC18F45K40-I/PT because the hardware CWG generates the complementary switching patterns needed for H-bridge gate drivers, and the DSM (Data Signal Modulator) modulates control signals for LED drivers or BLDC motor commutation in higher variants. The CCP/PWM modules configure dead-band control directly in hardware, freeing the CPU from timing-critical switching and reducing code size and interrupt latency requirements. The hardware comparators and 10-bit ADC provide hardware current-limit detection for overcurrent protection. Pair the MCU with a small half-bridge gate driver (MCP14E4) and logic-level N-channel MOSFETs for the H-bridge.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC18F45K40-I/PT — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC18F46K40-I/PT | PIC18F45K22-I/PT | PIC18F45K42-I/PT | PIC18F4685-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (PT), 10x10 mm | TQFP-44 (PT), 10x10 mm - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same |
| Program Memory (Flash) | 32 KB | 64 KB (+100%) | 32 KB (same) | 32 KB (same) | 96 KB (+200%) |
| RAM | 2 KB | 4 KB (+100%) | 1536 B (-23%) | 4 KB (+100%) | 3.5 KB (+75%) |
| EEPROM | 256 bytes | 1 KB (+300%) | 256 B (same) | 256 B (same) | 1 KB (+300%) |
| Maximum CPU Frequency | 64 MHz | 64 MHz (same) | 64 MHz (same) | 64 MHz (same) | 40 MHz (-38%) |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V (same) | 2.7 V to 5.5 V (same) | 2.7 V to 5.5 V (same) | 2.0 V to 5.5 V (wider) |
| CWG Peripheral | Yes | Yes (same) | No | Yes | No |
Principais diferenciais
- XLP nanoWatt technology with sub-100 nA sleep current (vs PIC18F45K22-I/PT)
- Core Independent Peripherals (CWG, CRC/SCAN, DSM, SMT) (vs PIC18F45K22-I/PT)
- Lower 2.7V minimum supply on K40 family (vs PIC18F4685-I/PT)
Notas de projeto
Place a 100 nF (0.1 uF) decoupling capacitor as close as possible to every VDD pin (pins 11 and 32 on the TQFP-44) and a single bulk 1 uF-10 uF tantalum or ceramic capacitor within roughly 25 mm of the supply pins. The PIC18F45K40-I/PT can wake from sleep in microseconds and therefore benefits from tight local bypassing so inrush during transient loads does not couple noise into the ADC reference. Do not share the bulk capacitor with high-current external loads.
Provision a 4.7-10 kohm pull-up on MCLR (pin 1) to keep the device out of reset during power-up; add a series resistor (typically 100-470 ohm) if you wish to disable ICSP later. The ICSP programming pins PGED1 (RB5) and PGEC1 (RB6) must be accessible from your connector layout to allow in-circuit firmware updates; avoid routing them under the crystal or near switching traces. Place the 32.768 kHz crystal on a quiet ground island and keep traces short per Microchip AN1516 PCB guidelines.
Estimated: at 64 MHz with FOSC = 64 MHz and a 2.7V supply, the MCU draws up to approximately 15 mA active. Verify your regulator's load step response using a real bench rather than the datasheet worst case. Do not exceed 5.5V on any pin (including ICSP), and use 1% resistors on the ADC reference or band-gap nodes. The I/PT suffix is the industrial grade (-40C to +85C); for AEC-Q100 automotive, choose the E-prefixed K40 variant in the same TQFP-44 package.
Informações de conformidade
Standard I/PT is industrial grade (-40C to +85C). For AEC-Q100 automotive qualification, select the E-prefixed K40 variant sharing the same TQFP-44 footprint, per Microchip family documentation.