PIC18F45K40-I/PT - 8-Bit 64MHz 32KB Flash XLP MCU 44-TQFP | Microchip
N.º de pieza: PIC18F45K40-I/PT ✓ Activo| Cant. | Precio unitario | 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 Descripción general
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 directas para PIC18F45K40-I/PT — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con PIC18F45K40-I/PT (mismo factor de forma y huella) — difiere en ADC, Package, Comparators, Core Architecture, Timers.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
PIC18F46K40-I/PT
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
PIC18F45K22-I/PT
✅ Sustitución directa✓ En stock
$2.65 / unidad
Ver hoja de datos →PIC18F45K42-I/PT
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$1.52 / unidad
Ver hoja de datos →PIC18F4685-I/PT
✅ Sustitución directa✓ En stock
$5.65 / unidad
Ver hoja de datos →PIC18F45K40-I/PT Valores máximos y características eléctricas
| 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) |
| Encapsulado | 44-pin TQFP (PT), 10x10 mm |
| Operating Temperature (Industrial) | -40C to +85C |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
| ICSP Programming | Yes (PGED1/PGEC1) |
Configuración de pines de PIC18F45K40-I/PT
| Pin 1 | MCLR — Master Clear (active-low reset) / ICSP programming voltage input |
| Pin 2 | RA0 — PORTA, bit 0 (digital I/O or analog input) |
| Pin 3 | RA1 — PORTA, bit 1 (digital I/O or analog input) |
| Pin 4 | RA2 — PORTA, bit 2 (digital I/O or analog input) |
| Pin 5 | RA3 — PORTA, bit 3 (digital I/O or analog input) |
| Pin 6 | RA4 — PORTA, bit 4 (digital I/O or analog input) |
| Pin 7 | RA5 — PORTA, bit 5 (digital I/O or analog input) |
| Pin 8 | RA6 — PORTA, bit 6 (digital I/O or analog input) |
| Pin 9 | RA7 — PORTA, bit 7 (digital I/O or analog input) |
| Pin 10 | VSS — Ground reference |
| Pin 11 | VDD — Positive supply input (2.7V to 5.5V) |
| Pin 12 | VSS — Ground reference |
| Pin 13 | OSC1 — External crystal/oscillator input |
| Pin 14 | OSC2 — External crystal/oscillator output |
| Pin 15 | RC0 — PORTC, bit 0 (digital I/O) |
| Pin 16 | RC1 — PORTC, bit 1 (digital I/O) |
| Pin 17 | RC2 — PORTC, bit 2 (digital I/O) |
| Pin 18 | RC3 — PORTC, bit 3 (digital I/O) |
| Pin 19 | RD0 — PORTD, bit 0 (digital I/O) |
| Pin 20 | RD1 — PORTD, bit 1 (digital I/O) |
| Pin 21 | RD2 — PORTD, bit 2 (digital I/O) |
| Pin 22 | RD3 — PORTD, bit 3 (digital I/O) |
| Pin 23 | RC4 — PORTC, bit 4 (digital I/O) |
| Pin 24 | RC5 — PORTC, bit 5 (digital I/O) |
| Pin 25 | RC6 — PORTC, bit 6 (digital I/O) |
| Pin 26 | RC7 — PORTC, bit 7 (digital I/O) |
| Pin 27 | RD4 — PORTD, bit 4 (digital I/O) |
| Pin 28 | RD5 — PORTD, bit 5 (digital I/O) |
| Pin 29 | RD6 — PORTD, bit 6 (digital I/O) |
| Pin 30 | RD7 — PORTD, bit 7 (digital I/O) |
| Pin 31 | VSS — Ground reference |
| Pin 32 | VDD — Positive supply input (2.7V to 5.5V) |
| Pin 33 | RB0 — PORTB, bit 0 (digital I/O; interrupt-on-change) |
| Pin 34 | RB1 — PORTB, bit 1 (digital I/O; interrupt-on-change) |
| Pin 35 | RB2 — PORTB, bit 2 (digital I/O; interrupt-on-change) |
| Pin 36 | RB3 — PORTB, bit 3 (digital I/O; interrupt-on-change) |
| Pin 37 | RB4 — PORTB, bit 4 (digital I/O; interrupt-on-change) |
| Pin 38 | RB5 — PORTB, bit 5 (digital I/O; PGED1 ICSP data) |
| Pin 39 | RB6 — PORTB, bit 6 (digital I/O; PGC1 ICSP clock) |
| Pin 40 | RB7 — PORTB, bit 7 (digital I/o) |
| Pin 41 | RE0 — PORTE, bit 0 (digital I/o) |
| Pin 42 | RE1 — PORTE, bit 1 (digital I/o) |
| Pin 43 | RE2 — PORTE, bit 2 (digital I/o) |
| Pin 44 | RE3 — PORTE, bit 3 (digital I/o) |
Aplicaciones típicas
PIC18F45K40-I/PT es adecuado para 6 aplicacións: 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
Resumen de productos recomendados
Datos de referencia de ingeniería para PIC18F45K40-I/PT — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | 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 |
Diferenciadores clave
- XLP nanoWatt technology with sub-100 nA sleep current (frente a PIC18F45K22-I/PT)
- Core Independent Peripherals (CWG, CRC/SCAN, DSM, SMT) (frente a PIC18F45K22-I/PT)
- Lower 2.7V minimum supply on K40 family (frente a PIC18F4685-I/PT)
Notas de diseño
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.
Información de cumplimiento
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.