PIC18F46K20T-I/MV - 8-bit 64MHz 64KB Flash MCU | Microchip
N.º da peça: PIC18F46K20T-I/MV ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $4.82 | $4,82 |
| 10 | $4.34 | $43,40 |
| 100 | $3.85 | $385,00 |
| 500 | $3.46 | $1.730,00 |
| 1.000 | $3.08 | $3.080,00 |
PIC18F46K20T-I/MV Visão geral
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash), volatile data memory (RAM), peripherals such as timers, A/D converters, and communication interfaces (UART, SPI, I2C), and general-purpose I/O into one package. Within the broader semiconductor hierarchy, an MCU is a sub-class of embedded processor -> microprocessor -> semiconductor device. The PIC18 family uses a RISC Harvard architecture with a 16-bit program word and 8-bit data path, balancing code density with deterministic interrupt handling - qualities that make PIC18 parts a baseline choice for cost-sensitive embedded control, especially in consumer, industrial, and low-power battery applications.
Key features of the PIC18F46K20T-I/MV include 35 digital I/O pins, 14 channels of 10-bit A/D conversion, 2 analog comparators, a hardware ECCP module, MSSP (SPI/I2C) and enhanced USART peripherals, four timers (three 16-bit, one 8-bit), and nanoWatt XLP technology that drives active current down to a few hundred microampere per MHz and sleep current into the sub-microampere region. The internal oscillator is factory calibrated to multiple frequencies up to 64MHz, eliminating the cost of an external crystal in many designs.
Architecturally, the PIC18F46K20 uses a 16-bit modified Harvard bus with a hardware multiply and 8x8 hardware multiply support, two hardware stack levels for context save, and a vectored interrupt controller. The device operates across -40C to +85C industrial temperature range and supports in-circuit serial programming (ICSP) plus in-circuit debugging via Microchip's MPLAB ecosystem.
Typical applications include consumer appliances, low-power remote controls, sensor nodes, battery-powered instrumentation, USB-CDC bridges (using software stack), and industrial control front-ends. The wide operating voltage range makes it well suited for 2-cell battery packs and energy-harvesting systems.
When designing with the PIC18F46K20T-I/MV, ensure the UQFN exposed pad is soldered to a continuous ground plane for thermal dissipation and mechanical reliability. Decouple VDD with 100nF ceramic plus 10uF bulk, and follow Microchip's MPLAB X IDE guidance for configuration bit setting (oscillator, brown-out, watchdog, code protection) before code generation.
This page synthesizes verified distributor pricing, drop-in compatible alternatives from the same Microchip PIC18F K-series family, application patterns, and design considerations not always assembled in the manufacturer datasheet.
Alternativas drop-in para PIC18F46K20T-I/MV — 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 PIC18F46K20T-I/MV (mesmo formato e footprint) — diferindo em RoHS Status, ADC, Internal Oscillator, Operating Temperature, Package.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC18F46K20-I/MV
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18F46K20T-E/MV
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18F44K20T-I/MV
✅ Drop-In✓ Em estoque
$3.32 / unidade
Ver ficha técnica →PIC18F43K20T-I/MV
✅ Drop-In✓ Em estoque
$1.59 / unidade
Ver ficha técnica →PIC18F46K22T-I/MV
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
PIC18F45K42T-I/MV
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
PIC18F46K20T-I/MV Classificações máximas e características elétricas
| Program Memory (Flash) | 64 KB (32K x 16) |
| Data Memory (RAM) | 3.8 KB (3936 bytes) |
| CPU Core | PIC18 8-bit RISC Harvard |
| Maximum CPU Frequency | 64 MHz |
| Instruction Execution Time | 200 ns at 20 MHz, 62.5 ns at 64 MHz |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| Temperatura de operação | -40 C to +85 C (Industrial, 'I' suffix) |
| Digital I/O Pins | 35 |
| A/D Converter | 10-bit, up to 14 channels |
| Analog Comparators | 2 |
| Timers | 3 x 16-bit + 1 x 8-bit |
| Capture/Compare/PWM | ECCP module |
| Communication Interfaces | 1 x EUSART, 1 x MSSP (SPI/I2C) |
| Internal Oscillator | Yes, factory calibrated up to 64 MHz |
| Encapsulamento | 40-pin UQFN (5 x 5 mm) with exposed pad, Tape & Reel |
| Tipo de montagem | Surface Mount |
| Nível MSL | MSL3 (per JEDEC J-STD-020) |
| Status RoHS | Compliant |
| Low-Power Technology | nanoWatt XLP |
Configuração de pinos do PIC18F46K20T-I/MV
| Pino 1 | RA0/AN0/ULPWU — Port A bit 0; analog input 0; ultra-low-power wake-up |
| Pino 2 | RA1/AN1 — Port A bit 1; analog input 1 |
| Pino 3 | RA2/AN2/VREF- — Port A bit 2; analog input 2; ADC negative reference |
| Pino 4 | RA3/AN3/VREF+ — Port A bit 3; analog input 3; ADC positive reference |
| Pino 5 | RA4/AN4/T0CKI — Port A bit 4; analog input 4; Timer 0 clock input |
| Pino 6 | RA5/AN5 — Port A bit 5; analog input 5 |
| Pino 7 | RA6/OSC2/CLKO — Port A bit 6; crystal oscillator output |
| Pino 8 | RA7/OSC1/CLKI — Port A bit 7; crystal oscillator input |
| Pino 9 | VSS — Ground reference |
| Pino 10 | VDD — Positive supply voltage |
| Pino 11 | RB0/INT0/FLT0 — Port B bit 0; external interrupt 0; ECCP fault input |
| Pino 12 | RB1/INT1 — Port B bit 1; external interrupt 1 |
| Pino 13 | RB2/INT2 — Port B bit 2; external interrupt 2 |
| Pino 14 | RB3/CCP2A — Port B bit 3; ECCP2 channel A |
| Pino 15 | RB4 — Port B bit 4 |
| Pino 16 | RB5 — Port B bit 5 |
| Pino 17 | RB6/PGC — Port B bit 6; ICSP clock (ICD) |
| Pino 18 | RB7/PGD — Port B bit 7; ICSP data (ICD) |
| Pino 19 | VSS — Ground reference |
| Pino 20 | VDD — Positive supply voltage |
| Pino 21 | RC0/SOSCO — Port C bit 0; secondary oscillator output (32.768 kHz) |
| Pino 22 | RC1/SOSCI — Port C bit 1; secondary oscillator input (32.768 kHz) |
| Pino 23 | RC2/CCP1 — Port C bit 2; ECCP1 channel |
| Pino 24 | RC3/SCL1/SCK1 — Port C bit 3; MSSP I2C clock / SPI clock |
| Pino 25 | RC4/SDA1/SDI1 — Port C bit 4; MSSP I2C data / SPI data in |
| Pino 26 | RC5/SDO1 — Port C bit 5; SPI data out |
| Pino 27 | RC6/TX1/CK1 — Port C bit 6; EUSART TX / clock |
| Pino 28 | RC7/RX1/DT1 — Port C bit 7; EUSART RX / data |
| Pino 29 | RE3/MCLR — Port E bit 3; master clear reset (active low) |
| Pino 30 | RD0 — Port D bit 0 |
| Pino 31 | RD1 — Port D bit 1 |
| Pino 32 | RD2 — Port D bit 2 |
| Pino 33 | RD3 — Port D bit 3 |
| Pino 34 | RD4 — Port D bit 4 |
| Pino 35 | RD5 — Port D bit 5 |
| Pino 36 | RD6/PSP7 — Port D bit 6; parallel slave port bit 7 |
| Pino 37 | RD7/PSP6 — Port D bit 7; parallel slave port bit 6 |
| Pino 38 | VSS — Ground reference |
| Pino 39 | VDD — Positive supply voltage |
| Pino 40 | EP — Exposed thermal pad - must be soldered to ground plane |
Aplicações típicas
PIC18F46K20T-I/MV é adequado para 6 aplicaçãos: Battery-Powered IoT Sensor Nodes, Consumer Appliance Control Panels, Industrial Sensor and Process Control, Automotive Body and Comfort Electronics, USB HID and CDC Bridge Devices, Medical and Health Monitoring Devices.
Battery-Powered IoT Sensor Nodes
The PIC18F46K20T-I/MV is purpose-built for battery-powered wireless sensor nodes thanks to its nanoWatt XLP technology, which delivers active current around 200 uA/MHz at 3.3V and sleep currents below 1 uA with RTCC enabled. The 1.8V to 3.6V VDD range aligns with single-cell Li-ion discharge curves and 2x AA alkaline packs without a boost regulator. The 14-channel 10-bit ADC interfaces directly with temperature, humidity, and gas sensors; the 35 GPIO lines drive indicator LEDs, user buttons, and external sensor enables. The MSSP peripheral hosts SPI/I2C sensor buses while EUSART provides UART connectivity for debug or radio modules like LoRa or BLE co-processors. The 64KB Flash accommodates over-the-air firmware update bootloaders plus application code, and the 3.8KB RAM is sufficient for sensor buffers and small protocol stacks. With -40C to +85C industrial temperature range, the part survives outdoor and automotive cabin deployments.
Recomendado
Consumer Appliance Control Panels
The PIC18F46K20T-I/MV drives the human-machine interface in white-goods and small kitchen appliances, including washing machines, microwave ovens, and coffee makers. Its 35 GPIO pins directly scan 7-segment displays, LED matrices, and capacitive touch buttons through the MSSP-driven I/O expanders, while the ECCP module generates precise PWM to control brushed motor drivers, solenoid valves, and buzzer tones. The internal 64MHz oscillator eliminates external crystals for cost-sensitive consumer products, and the 1.8V to 3.6V supply works directly from rectified mains auxiliary rails. The 10-bit ADC reads thermistor inputs for temperature regulation, and the dual analog comparators implement over-temperature and dry-boil protection with hardware response - critical for safety compliance. The nanoWatt XLP idle mode drops consumption when the appliance is in standby, satisfying modern standby-power regulations (Energy Star, EU 1275). The 64KB Flash stores UI state machines and diagnostic logs.
Recomendado
Industrial Sensor and Process Control
In factory automation nodes, the PIC18F46K20T-I/MV provides deterministic 8-bit control for 4-20 mA sensor transmitters, panel meters, and process controllers. Its 14-channel 10-bit ADC simultaneously samples multiple analog inputs from RTDs, thermocouples (via analog front ends), pressure transducers, and flow meters. The EUSART links to RS-485 transceivers for Modbus RTU fieldbus communication over industrial cabling, while the MSSP drives SPI-based DACs for analog output modules. The ECCP delivers precision PWM for proportional valve control, and the 16-bit timers enable accurate frequency and pulse counting for flow meters and tachometers. The industrial temperature rating (-40C to +85C) and high ESD robustness make it suitable for control cabinet installations. The 64KB Flash supports IEC 61131-3 style function-block firmware plus Modbus protocol stacks, and 3.8KB RAM handles command buffers and parameter tables.
Recomendado
Automotive Body and Comfort Electronics
Within automotive body controllers for window lifts, seat controllers, mirror adjusters, and interior lighting, the PIC18F46K20T-I/MV delivers the right mix of GPIO, PWM channels, and ADC inputs at 3.3V logic. The ECCP and PWM timers drive LED dimming and motor speed control with hardware fault shutdown; the analog comparators detect over-current on motor driver outputs. The EUSART supports LIN bus communication through an external LIN transceiver, while MSSP interfaces with SPI-controlled LED drivers. The 64KB Flash comfortably stores LIN node capability (LNC) files plus application firmware. While the I-grade part suits cabin environments, the AEC-Q100 qualified variants (e.g., PIC18F46K20-I/PT automotive version) are recommended for under-hood applications. The nanoWatt XLP modes help meet parasitic quiescent current budgets when the vehicle is parked.
Recomendado
USB HID and CDC Bridge Devices
The PIC18F46K20T-I/MV runs Microchip's free USB CDC and HID class firmware stacks to implement USB-to-UART bridges, HID input devices, and custom vendor-class peripherals. The MSSP and EUSART peripherals forward traffic between the USB endpoint buffers (in RAM) and the host UART/SPI/I2C bus, while the 64KB Flash accommodates the Microchip MLA USB stack (~20KB) plus application code. The 5V tolerance on selected I/O pins allows direct connection to USB VBUS through voltage dividers, and the 3.3V core is supplied from USB via internal regulators or an external LDO. The 10-bit ADC can monitor VBUS for plug/unplug detection. The 64MHz CPU clock provides deterministic USB full-speed (12 Mbps) frame timing. Common uses include USB-to-UART debug bridges, USB keyboards, custom HID sensors, and Microchip-bootloader-programmable production tools.
Recomendado
Medical and Health Monitoring Devices
For non-critical medical peripherals such as digital thermometers, pulse oximeter front-ends, and personal health monitors, the PIC18F46K20T-I/MV provides sufficient computation for sensor fusion and user interface in a compact 5x5 mm UQFN. The 14-channel 10-bit ADC reads photodiode signals from pulse oximetry sensors or thermistor bridges in clinical thermometers. The MSSP drives SPI-based OLED displays for readout, while the ECCP generates audible alerts via piezo buzzer. The nanoWatt XLP modes extend battery life in portable devices, with sleep currents under 1 uA preserving coin-cell capacity over multi-year shelf life. The -40C to +85C operating range covers clinical environments. Compliance with IEC 60601-1 is the responsibility of the integrator, but the part's deterministic interrupts and watchdog timer help implement required safety firmware patterns.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC18F46K20T-I/MV — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC18F46K20-I/MV | PIC18F46K20T-E/MV | PIC18F44K20T-I/MV | PIC18F43K20T-I/MV | PIC18F46K22T-I/MV | PIC18F45K42T-I/MV |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-pin UQFN (5x5 mm) with EP | 40-pin UQFN (5x5 mm) - same | 40-pin UQFN (5x5 mm) - same | 40-pin UQFN (5x5 mm) - same | 40-pin UQFN (5x5 mm) - same | 40-pin UQFN (5x5 mm) - same | 40-pin UQFN (5x5 mm) - same |
| Flash Memory | 64 KB | 64 KB | 64 KB | 16 KB | 8 KB | 64 KB | 64 KB |
| RAM | 3.8 KB | 3.8 KB | 3.8 KB | 768 B | 512 B | 3.8 KB | 4 KB |
| Maximum CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Operating Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 5.5 V |
| Temperature Range | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +125 C (Extended) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| A/D Converter | 10-bit, 14 channels | 10-bit, 14 channels | 10-bit, 14 channels | 10-bit, 14 channels | 10-bit, 14 channels | 10-bit, 14 channels | 12-bit, 24 channels |
| Pin Count | 40 | 40 | 40 | 40 | 40 | 40 | 40 |
Principais diferenciais
- Highest Flash capacity in 40-pin UQFN PIC18F K20 family (vs PIC18F44K20T-I/MV (16KB Flash))
- Same-package extended temperature variant available (vs PIC18F46K20T-E/MV (extended temperature))
- NanoWatt XLP low-power technology (vs PIC18F45K42T-I/MV (K42 generation))
Notas de projeto
The 40-pin UQFN package has an exposed thermal pad (EP) at pin 40 that must be soldered to a continuous ground copper pour for thermal dissipation and mechanical reliability. Place a 5x5 array of 0.3 mm thermal vias under the EP connecting top and bottom ground planes. Recommended land pattern follows IPC-7351 with 0.5 mm pitch QFN conventions. Without EP soldering, the part can overheat under high GPIO toggling loads and the mechanical board connection may fracture under vibration. Reference Microchip application note AN383 for UQFN PCB design guidance.
Place a 100 nF ceramic decoupling capacitor as close as possible to each VDD pin (pins 10, 20, 39) with the ground return connected to the EP/pour directly under the IC. Add a bulk 10 uF ceramic or tantalum capacitor near the MCU VDD rail. For battery-powered designs using nanoWatt XLP, ensure the LDO or DC/DC regulator has a quiescent current below the MCU's sleep current to maximize battery life - MCP1700 (1.6 uA Iq) is a typical companion choice. Add bulk capacitance on analog reference (VREF+) when used.
Do not leave the MCLR pin floating - it must be pulled to VDD through a 10 kohm resistor (or driven by a reset supervisor) to ensure defined startup. Configuration bits must be set explicitly in source code; Microchip recommends using the #pragma config directives in MPLAB X. The internal HFINTOSC requires calibration via the OSCTUNE register - factory calibration values are stored in program memory and should be loaded at startup. Avoid using the ICSP pins (RB6/RB7) as general GPIO unless ICSP is not required for production programming, as this complicates field firmware updates.
When using the MSSP in SPI master mode at high speeds (>4 MHz), keep clock traces short and route SCLK/MOSI/MISO as a controlled-impedance group with ground reference. Place a 50 ohm series termination at the master SCLK output if the trace exceeds 50 mm. For I2C buses, select 4.7 kohm pull-ups for 400 kHz Fast Mode and verify the cumulative bus capacitance stays below the 400 pF budget. Analog inputs should be guarded with ground traces to minimize crosstalk from adjacent digital lines.
Informações de conformidade
Industrial temperature grade (-40C to +85C); not AEC-Q100 qualified - choose automotive-graded PIC18F variants for under-hood applications. RoHS and REACH compliant per Microchip product declaration; lead-free and halogen-free per JEDEC J-STD-020 MSL3 packaging classification.
