PIC18F45K40T-I/PT - 32KB Flash 8-bit MCU, 44-TQFP | Microchip
N.º da peça: PIC18F45K40T-I/PT ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $4.2 | $4,20 |
| 10 | $3.85 | $38,50 |
| 100 | $3.4 | $340,00 |
| 500 | $2.95 | $1.475,00 |
| 1.000 | $2.65 | $2.650,00 |
PIC18F45K40T-I/PT Visão geral
An 8-bit PIC microcontroller (MCU) is a single-chip computer based on Microchip's PIC (Peripheral Interface Controller) RISC architecture, integrating a CPU core, Flash program memory, SRAM, EEPROM data memory, and a rich set of peripherals (ADC, timers, PWM, communication interfaces such as UART/SPI/I2C). Within the broader taxonomy, the PIC18F family sits at the high-end of Microchip's 8-bit line, providing a 16-bit instruction word, linear memory model, and C-optimized architecture suitable for moderately complex embedded real-time control tasks.
Key features include 36 digital I/O pins, 35 instructions with a 200ns minimum instruction cycle at 64MHz, an integrated 10-bit ADC with up to 35 channels, a 5-bit DAC, up to four CCP/ECCP modules, a Complementary Waveform Generator (CWG), Hardware Limit Timer (HLT), Windowed Watchdog Timer (WWDT), and SCAN/CRC for functional safety. Core Independent Peripherals (CIPs) such as the CWG, NCO, and DSM execute waveform synthesis and signal processing without CPU intervention, freeing the core for application logic.
The PIC18F45K40 employs Microchip's enhanced mid-range core with a hardware 8x8 multiplier and a 32-level deep stack, enabling efficient C code generation. The wide 2.5V-5.5V VDD range supports both 3.3V and legacy 5V designs, while XLP technology delivers nanoamp-level sleep currents suited to energy-harvesting and battery-backed applications. Peripheral Pin Select (PPS) provides flexible remapping of digital peripherals to physical pins, simplifying PCB layout and reducing firmware pin-out constraints.
Typical applications include industrial control and HMI panels, home appliance controls, IoT edge sensor nodes, automotive body electronics, low-power remote sensors, and consumer electronics with touch or proximity sensing. The combination of 5V tolerance and rich analog peripherals makes it well-suited to sensor conditioning, motor control loops, and lighting-control subsystems.
When designing with this part, ensure the MCLR reset circuit follows Microchip's recommended RC time constant, and place decoupling capacitors (100nF plus 10uF bulk) within 5mm of VDD/AVDD pins. The PPS feature must be configured in firmware before peripheral use, so software teams should budget initialization time accordingly and lock peripheral mappings once the final pinout is committed.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on a single manufacturer or distributor page, enabling engineers to evaluate PIC18F45K40T-I/PT fit for their design in one place.
Alternativas drop-in para PIC18F45K40T-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 PIC18F45K40T-I/PT (mesmo formato e footprint) — diferindo em ADC, Package, Comparators, Program Memory (Flash), Operating Temperature.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC18F45K40-I/PT
✅ Drop-In✓ Em estoque
$1.92 / unidade
Ver ficha técnica →PIC18F46K40-I/PT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18F45K40T-I/MV
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18F27K40-I/SS
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$1.99 / unidade
Ver ficha técnica →PIC18F27K42-I/SS
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$1.82 / unidade
Ver ficha técnica →PIC18F45K40T-I/PT Classificações máximas e características elétricas
| Core Architecture | PIC18 (8-bit, enhanced mid-range) |
| Program Memory (Flash) | 32 KB (16K x 16) |
| Data SRAM | 2 KB |
| Data EEPROM | 256 B |
| Maximum CPU Speed | 64 MHz (200 ns instruction cycle) |
| Operating Voltage (VDD) | 2.5 V to 5.5 V |
| I/O Pins | 36 |
| ADC | 10-bit, up to 35 channels |
| DAC | 5-bit, 1 channel |
| CCP / ECCP Modules | Up to 4 |
| Encapsulamento | 44-pin TQFP (10 x 10 mm), tape & reel |
| Temperatura de operação | -40 C to +85 C (Industrial, "I") |
| Low-Power Technology | XLP (eXtreme Low Power) |
| Core Independent Peripherals | CWG, NCO, DSM, CLC, HLT, WWDT |
| Tipo de montagem | Surface Mount |
Configuração de pinos do PIC18F45K40T-I/PT
| Pino 1 | RA0/AN0 — Digital I/O / analog input channel 0 |
| Pino 2 | RA1/AN1 — Digital I/O / analog input channel 1 |
| Pino 3 | RA2/AN2 — Digital I/O / analog input channel 2 |
| Pino 4 | RA3/AN3 — Digital I/O / analog input channel 3 |
| Pino 5 | RA4/AN4 — Digital I/O / analog input channel 4 |
| Pino 6 | RA5/AN5 — Digital I/O / analog input channel 5 |
| Pino 7 | RA6/OSC2 — Digital I/O / oscillator output |
| Pino 8 | RA7/OSC1 — Digital I/O / oscillator input |
| Pino 9 | RE3/MCLR — Digital input / Master Clear (reset) |
| Pino 10 | VDD — Positive supply voltage |
| Pino 11 | VSS — Ground reference |
| Pino 12 | RB0/AN12 — Digital I/O / analog input channel 12 |
| Pino 13 | RB1/AN10 — Digital I/O / analog input channel 10 |
| Pino 14 | RB2/AN8 — Digital I/O / analog input channel 8 |
| Pino 15 | RB3/AN9 — Digital I/O / analog input channel 9 |
| Pino 16 | RB4 — Digital I/O |
| Pino 17 | RB5 — Digital I/O |
| Pino 18 | RB6/PGC — Digital I/O / ICSP clock |
| Pino 19 | RB7/PGD — Digital I/O / ICSP data |
| Pino 20 | VSS — Ground reference |
| Pino 21 | RC0 — Digital I/O |
| Pino 22 | RC1 — Digital I/O |
| Pino 23 | RC2 — Digital I/O |
| Pino 24 | RC3 — Digital I/O |
| Pino 25 | RC4 — Digital I/O |
| Pino 26 | RC5 — Digital I/O |
| Pino 27 | RC6 — Digital I/O |
| Pino 28 | RC7 — Digital I/O |
| Pino 29 | RD0 — Digital I/O |
| Pino 30 | RD1 — Digital I/O |
| Pino 31 | RD2 — Digital I/O |
| Pino 32 | RD3 — Digital I/O |
| Pino 33 | RD4 — Digital I/O |
| Pino 34 | RD5 — Digital I/O |
| Pino 35 | RD6 — Digital I/O |
| Pino 36 | RD7 — Digital I/O |
| Pino 37 | VSS — Ground reference |
| Pino 38 | VDD — Positive supply voltage |
| Pino 39 | RE0 — Digital I/O |
| Pino 40 | RE1 — Digital I/O |
| Pino 41 | RE2 — Digital I/O |
| Pino 42 | AVDD — Analog positive supply voltage |
| Pino 43 | AVSS — Analog ground reference |
| Pino 44 | NC — Not connected (per datasheet) |
Aplicações típicas
PIC18F45K40T-I/PT é adequado para 7 aplicaçãos: Industrial Control and HMI Panels, Home Appliance Control Boards, IoT Edge Sensor Nodes, Automotive Body Electronics, Low-Power Remote Sensors, Consumer Electronics with Touch Sensing, Lighting Control Subsystems.
Industrial Control and HMI Panels
The PIC18F45K40T-I/PT fits industrial control and HMI panels because its 64 MHz enhanced mid-range core delivers deterministic 200 ns instruction cycles for real-time control loops, while the 36 digital I/O pins directly drive keypads, LEDs, and segment displays. Its integrated 10-bit ADC with up to 35 channels handles multiple sensor inputs such as temperature, pressure, and current sensing without external ADC ICs. The 32 KB Flash supports a full graphical menu stack plus a Modbus RTU or CANopen firmware image, and the 256 B EEPROM stores user-setpoint calibration parameters across power cycles. XLP low-power modes further let the panel enter a sleep state between user interactions while the CWG peripheral drives backlight PWM. According to the Microchip datasheet, the wide 2.5 V to 5.5 V VDD range tolerates 24 V industrial bus-derived rails after a simple LDO step-down.
Recomendado
Home Appliance Control Boards
The PIC18F45K40T-I/PT is well-suited to home appliance control boards such as washing machines, dishwashers, and induction cooktops because the wide 2.5 V to 5.5 V VDD range lets it ride directly off rectified mains-derived 5 V rails without additional level translation. Its Core Independent Peripherals, including the Complementary Waveform Generator (CWG) and Hardware Limit Timer (HLT), synthesize motor-drive PWM and enforce hardware-level current limits offloading the CPU. The 10-bit ADC with up to 35 channels reads multiple temperature probes, water-level sensors, and motor current shunts simultaneously, while the 5-bit DAC supports reference voltages for analog comparator-based protection circuits. PPS allows firmware-driven pin reassignment, accelerating late-stage PCB respins without silicon changes.
Recomendado
IoT Edge Sensor Nodes
The PIC18F45K40T-I/PT fits IoT edge sensor nodes because XLP technology delivers nanoamp-range sleep currents, allowing battery-powered nodes to wake only on sensor events and extend coin-cell lifetime into multi-year ranges. Core Independent Peripherals such as the CLC and DSM perform local signal conditioning and threshold detection without waking the core, while the 10-bit ADC samples analog sensors with low active current. Peripheral Pin Select (PPS) lets designers remap UART, SPI, and I2C to any digital I/O pin, simplifying PCB layout when adding wireless modules. The 256 B EEPROM stores sensor calibration coefficients that persist across deep-sleep cycles, and the 32 KB Flash accommodates a small RTOS or state-machine firmware plus an OTA bootloader stub.
Recomendado
Automotive Body Electronics
The PIC18F45K40T-I/PT serves automotive body electronics such as lighting controllers, seat modules, and mirror adjusters because the wide 2.5 V to 5.5 V VDD range tolerates 12 V battery transients after a TVS-protected LDO, and the 36 I/O pins drive multiple LED strings and H-bridge motor pre-drivers. The CCP/ECCP modules generate PWM for dimming and motor speed control, while the Windowed Watchdog Timer (WWDT) and CRC/SCAN peripherals add functional-safety features typical of body-domain modules. The 32 KB Flash is sufficient for CAN-capable firmware via an external MCP2515 controller, and the 256 B EEPROM stores configuration such as seat-position memory. Engineers should note that for under-hood or AEC-Q100-mandated applications, the Q-graded variants of the K40 family are required.
Recomendado
Low-Power Remote Sensors
The PIC18F45K40T-I/PT is appropriate for low-power remote sensors because XLP sleep modes combined with the Windowed Watchdog Timer keep average current draw in the microamp range while still recovering from firmware lockups. The 10-bit ADC with up to 35 channels handles multiple environmental inputs such as humidity, pressure, and battery voltage on a single MCU. The 32 KB Flash supports a small firmware image plus an over-the-air firmware update stub, while the 256 B EEPROM retains calibration and node-ID information through battery-replacement events. Peripheral Pin Select lets the UART, SPI, and I2C peripherals map to the same pins as an attached LoRa or sub-GHz transceiver, simplifying two-layer PCB construction.
Recomendado
Consumer Electronics with Touch Sensing
The PIC18F45K40T-I/PT supports consumer products with touch or proximity sensing because its Core Independent Peripherals include the CLC and DSM, which perform hardware-level capacitive sensing without CPU intervention, freeing the core for HMI logic. The wide 2.5 V to 5.5 V VDD range accommodates single-cell lithium packs and 5 V USB-powered designs alike. The 32 KB Flash fits a touch UI state machine plus a small graphics library for segmented LCD or OLED displays, while the 256 B EEPROM stores user preferences such as backlight brightness and language. PPS lets the touch-sensing channels and display interface share the same physical pins as needed, simplifying mechanical integration in slim enclosures.
Recomendado
Lighting Control Subsystems
The PIC18F45K40T-I/PT is well-matched to lighting control subsystems such as LED drivers and dimmer modules because the CCP/ECCP modules generate high-resolution PWM for dimming, while the CWG peripheral produces complementary dead-band-controlled outputs that drive half-bridge LED stages without shoot-through. The 10-bit ADC reads ambient light sensors and potentiometer dim inputs simultaneously, while the 5-bit DAC supports analog reference voltages for constant-current LED drivers. The wide 2.5 V to 5.5 V VDD range lets the MCU ride directly off rectified mains-derived 5 V rails after a small linear regulator. PPS reassigns peripheral pins to keep the PCB layout clean even when adding DMX or DALI interfaces.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC18F45K40T-I/PT — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC18F45K40-I/PT | PIC18F46K40-I/PT | PIC18F45K40T-I/MV |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (10x10 mm), tape & reel | TQFP-44 (10x10 mm), tray - same | TQFP-44 (10x10 mm), tray - same | TQFP-44 (10x10 mm), tape & reel - same |
| Flash Program Memory | 32 KB | 32 KB (identical) | 64 KB (+100%) | 32 KB (identical) |
| SRAM | 2 KB | 2 KB (identical) | 2 KB (identical) | 2 KB (identical) |
| EEPROM | 256 B | 256 B (identical) | 256 B (identical) | 256 B (identical) |
| Maximum CPU Speed | 64 MHz | 64 MHz (identical) | 64 MHz (identical) | 64 MHz (identical) |
| Operating Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V (identical) | 2.5 V to 5.5 V (identical) | 2.5 V to 5.5 V (identical) |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C (identical) | -40 C to +85 C (identical) | -40 C to +85 C (identical) |
| I/O Pins | 36 | 36 (identical) | 36 (identical) | 36 (identical) |
| Packaging Format | Tape & Reel | Tray | Tray | Tape & Reel |
Principais diferenciais
- XLP technology with nanoamp sleep currents (vs PIC18F45K22-I/PT (older K22 family))
- Peripheral Pin Select (PPS) on all digital functions (vs PIC18F46K40-I/PT (same family, no PPS advantage))
- 10-bit ADC with up to 35 channels (vs PIC18F27K40-I/SS (28-pin variant))
Notas de projeto
Place a 100 nF ceramic decoupling capacitor within 5 mm of each VDD pin and a 10 uF bulk capacitor near the MCU. The PIC18F45K40T-I/PT has multiple VDD/VSS pin pairs; tying each VDD to a low-impedance 2.5 V to 5.5 V source reduces digital switching noise coupling into the analog rail. If AVDD is supplied from a separate LDO, add a small ferrite bead between VDD and AVDD to isolate ADC noise.
Configure Peripheral Pin Select (PPS) registers in firmware before invoking peripherals. PPS mappings are unlocked by writing to PPSLOCK and must be re-locked after configuration; forgetting this sequence is a common cause of peripherals appearing 'dead' on first prototype bring-up. Refer to the PIC18F26/45/46K40 datasheet for the exact unlock-locking sequence and PPS register map.
Keep the ICSP clock (PGC) and data (PGD) traces short and parallel to avoid programming-time errors. The 44-pin TQFP (10x10 mm) package has adequate clearance for a 2-layer board, but route the oscillator pins (RA6/OSC2, RA7/OSC1) with a ground guard ring to minimize EMI coupling into the ADC inputs. Decoupling capacitors should use short vias to the ground plane.
Estimated: At maximum 64 MHz operation from 5.5 V VDD with all 36 I/O pins driving 20 mA, internal dissipation reaches approximately 0.3 W. The TQFP-44 package with standard JEDEC 4-layer PCB has theta_JA of approximately 50 C/W, yielding a junction temperature rise of about 15 C above ambient at full digital load. No heatsink is required for normal embedded operation; ensure ambient stays within the -40 C to +85 C industrial range.
Informações de conformidade
RoHS and REACH compliant per Microchip product page; the standard I/PT grade is industrial-temperature, not AEC-Q100 qualified. For automotive applications use the Q-graded PIC18F45K40 variants.
