PIC18F46K20T-I/MV - 8-bit 64MHz 64KB Flash MCU | Microchip
MPN: PIC18F46K20T-I/MV ✓ פעילPIC18F46K20T-I/MV סקירה
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.
חלופות תחליף ישיר עבור PIC18F46K20T-I/MV — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם PIC18F46K20T-I/MV (אותו גורם צורה וטביעת רגל) — שונים ב RoHS Status, ADC, Internal Oscillator, Operating Temperature, Package.
PIC18F46K20-I/MV
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PIC18F46K20T-E/MV
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PIC18F44K20T-I/MV
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18F43K20T-I/MV
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18F46K22T-I/MV
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
PIC18F45K42T-I/MV
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
PIC18F46K20T-I/MV דירוגים מרביים ומאפיינים חשמליים
| 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 |
| טמפרטורת פעולה | -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 |
| מארז | 40-pin UQFN (5 x 5 mm) with exposed pad, Tape & Reel |
| סוג הרכבה | Surface Mount |
| רמת MSL | MSL3 (per JEDEC J-STD-020) |
| סטטוס RoHS | Compliant |
| Low-Power Technology | nanoWatt XLP |
תצורת פינים של PIC18F46K20T-I/MV
| פין 1 | RA0/AN0/ULPWU — Port A bit 0; analog input 0; ultra-low-power wake-up |
| פין 2 | RA1/AN1 — Port A bit 1; analog input 1 |
| פין 3 | RA2/AN2/VREF- — Port A bit 2; analog input 2; ADC negative reference |
| פין 4 | RA3/AN3/VREF+ — Port A bit 3; analog input 3; ADC positive reference |
| פין 5 | RA4/AN4/T0CKI — Port A bit 4; analog input 4; Timer 0 clock input |
| פין 6 | RA5/AN5 — Port A bit 5; analog input 5 |
| פין 7 | RA6/OSC2/CLKO — Port A bit 6; crystal oscillator output |
| פין 8 | RA7/OSC1/CLKI — Port A bit 7; crystal oscillator input |
| פין 9 | VSS — Ground reference |
| פין 10 | VDD — Positive supply voltage |
| פין 11 | RB0/INT0/FLT0 — Port B bit 0; external interrupt 0; ECCP fault input |
| פין 12 | RB1/INT1 — Port B bit 1; external interrupt 1 |
| פין 13 | RB2/INT2 — Port B bit 2; external interrupt 2 |
| פין 14 | RB3/CCP2A — Port B bit 3; ECCP2 channel A |
| פין 15 | RB4 — Port B bit 4 |
| פין 16 | RB5 — Port B bit 5 |
| פין 17 | RB6/PGC — Port B bit 6; ICSP clock (ICD) |
| פין 18 | RB7/PGD — Port B bit 7; ICSP data (ICD) |
| פין 19 | VSS — Ground reference |
| פין 20 | VDD — Positive supply voltage |
| פין 21 | RC0/SOSCO — Port C bit 0; secondary oscillator output (32.768 kHz) |
| פין 22 | RC1/SOSCI — Port C bit 1; secondary oscillator input (32.768 kHz) |
| פין 23 | RC2/CCP1 — Port C bit 2; ECCP1 channel |
| פין 24 | RC3/SCL1/SCK1 — Port C bit 3; MSSP I2C clock / SPI clock |
| פין 25 | RC4/SDA1/SDI1 — Port C bit 4; MSSP I2C data / SPI data in |
| פין 26 | RC5/SDO1 — Port C bit 5; SPI data out |
| פין 27 | RC6/TX1/CK1 — Port C bit 6; EUSART TX / clock |
| פין 28 | RC7/RX1/DT1 — Port C bit 7; EUSART RX / data |
| פין 29 | RE3/MCLR — Port E bit 3; master clear reset (active low) |
| פין 30 | RD0 — Port D bit 0 |
| פין 31 | RD1 — Port D bit 1 |
| פין 32 | RD2 — Port D bit 2 |
| פין 33 | RD3 — Port D bit 3 |
| פין 34 | RD4 — Port D bit 4 |
| פין 35 | RD5 — Port D bit 5 |
| פין 36 | RD6/PSP7 — Port D bit 6; parallel slave port bit 7 |
| פין 37 | RD7/PSP6 — Port D bit 7; parallel slave port bit 6 |
| פין 38 | VSS — Ground reference |
| פין 39 | VDD — Positive supply voltage |
| פין 40 | EP — Exposed thermal pad - must be soldered to ground plane |
יישומים טיפוסיים
PIC18F46K20T-I/MV מתאים עבור 6 יישוםs: 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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור PIC18F46K20T-I/MV — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | 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 |
מבדילים עיקריים
- Highest Flash capacity in 40-pin UQFN PIC18F K20 family (לעומתPIC18F44K20T-I/MV (16KB Flash))
- Same-package extended temperature variant available (לעומתPIC18F46K20T-E/MV (extended temperature))
- NanoWatt XLP low-power technology (לעומתPIC18F45K42T-I/MV (K42 generation))
הערות תכנון
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.
מידע על תאימות
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.
