PIC18F46K22-I/PT - 64KB Flash 8-bit XLP MCU 44-TQFP | Microchip
MPN: PIC18F46K22-I/PT ✓ نشطPIC18F46K22-I/PT نظرة عامة
A microcontroller (MCU) is a single-chip computer containing a CPU core, program and data memory, and programmable I/O peripherals. Within Microchip's taxonomy, this part is an 8-bit CISC Harvard-architecture MCU belonging to the PIC18 enhanced family, which is widely used in mid-complexity embedded applications. The "F" suffix denotes Flash program memory; "K" designates the low-power nanoWatt XLP variant; "46" indicates the 64 KB Flash / 3.8 KB RAM density tier; "K22" is the die revision; "I" specifies the industrial -40C to +85C temperature range; and "/PT" indicates the 44-pin TQFP surface-mount package.
Key features include 36 digital I/O pins, two Enhanced USART modules, two MSSP (I2C/SPI) peripherals, a 12-bit A/D converter with up to 28 input channels, five 16-bit timers, and a 5-bit DAC. The on-chip 64 MHz oscillator and 31 kHz low-power oscillator support flexible clocking. The device operates from 1.8 V to 5.5 V with nanoWatt XLP idle currents as low as 50 nA, enabling multi-year battery life in sleep-dominant applications.
The PIC18F46K22 is built on a high-performance 8-bit modified Harvard core featuring a 16-bit instruction word and an 8-bit data path, allowing single-cycle ALU operations and aggressive power-management gating. The 12-bit ADC uses a successive-approximation architecture with acquisition and conversion pipelining, suitable for sensor signal chains at moderate sampling rates.
Typical applications include industrial sensor interfaces, low-power IoT edge nodes, HVAC control panels, motor-control BLDC drivers, USB-to-UART bridges, and consumer appliance control boards. Designers benefit from Microchip's MPLAB X IDE, XC8 compiler, and PICkit programmers.
When designing with this part, ensure the supply decoupling follows the datasheet reference layout: one 100 nF ceramic per VDD pair placed within 3 mm of the pins, plus a bulk 10 nF to 100 nF across the supply rail. Use the internal 16 MHz HFINTOSC and PLL for 64 MHz operation to minimize external BOM cost.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single decision-grade reference for sourcing and substitution.
بدائل مباشرة لـ PIC18F46K22-I/PT — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PIC18F46K22-I/PT (نفس عامل الشكل والبصمة) — يختلف في Timers, Operating Temperature, Program Memory (Flash), Package, Core Architecture.
PIC18F45K22-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F46K22-I/P
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F46K22-E/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F46K22T-I/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F46K40-I/PT
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18F46Q10-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F46K22-I/PT الحدود القصوى والخصائص الكهربائية
| Core Architecture | PIC18 Enhanced 8-bit CISC Harvard |
| Program Memory (Flash) | 64 KB (32K x 16) |
| Data RAM | 3.8 KB (3968 bytes) |
| Data EEPROM | 1 KB (1024 bytes) |
| Maximum CPU Frequency | 64 MHz (16 MIPS) |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Digital I/O Pins | 36 |
| A/D Converter | 12-bit, up to 28 channels |
| DAC | 5-bit, 1 channel |
| Timers | Five 16-bit timers/counters |
| Communication Peripherals | 2x Enhanced USART, 2x MSSP (I2C/SPI) |
| Low-Power Technology | nanoWatt XLP (sleep current ~50 nA typical) |
| درجة حرارة التشغيل | -40C to +85C (Industrial, "I" grade) |
| العلبة | 44-pin TQFP (PT), 10x10 mm |
| نوع التركيب | Surface Mount |
| مستوى MSL | 3 (168 hours) |
| حالة RoHS | Compliant |
تكوين أطراف PIC18F46K22-I/PT
| دبوس 1 | RA0/AN0 — PORTA bit 0 / Analog input channel 0 |
| دبوس 2 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| دبوس 3 | RA2/AN2 — PORTA bit 2 / Analog input channel 2 |
| دبوس 4 | RA3/AN3 — PORTA bit 3 / Analog input channel 3 |
| دبوس 5 | RA4/AN4 — PORTA bit 4 / Analog input channel 4 |
| دبوس 6 | RA5/AN5 — PORTA bit 5 / Analog input channel 5 |
| دبوس 7 | RA6/OSC2 — PORTA bit 6 / Oscillator output |
| دبوس 8 | RA7/OSC1 — PORTA bit 7 / Oscillator input |
| دبوس 9 | VSS — Ground reference |
| دبوس 10 | VDD — Positive supply voltage |
| دبوس 11 | MCLR — Master Clear reset input (active low) |
| دبوس 12 | RB0/AN12 — PORTB bit 0 / Analog input channel 12 |
| دبوس 13 | RB1/AN10 — PORTB bit 1 / Analog input channel 10 |
| دبوس 14 | RB2/AN8 — PORTB bit 2 / Analog input channel 8 |
| دبوس 15 | RB3/AN9 — PORTB bit 3 / Analog input channel 9 |
| دبوس 16 | RB4/AN11 — PORTB bit 4 / Analog input channel 11 |
| دبوس 17 | RB5/AN13 — PORTB bit 5 / Analog input channel 13 |
| دبوس 18 | RB6/ICSPCLK — PORTB bit 6 / In-Circuit Serial Programming clock |
| دبوس 19 | RB7/ICSPDAT — PORTB bit 7 / In-Circuit Serial Programming data |
| دبوس 20 | VSS — Ground reference |
| دبوس 21 | VDD — Positive supply voltage |
| دبوس 22 | RC0/SOSCO — PORTC bit 0 / Secondary oscillator output |
| دبوس 23 | RC1/SOSCI — PORTC bit 1 / Secondary oscillator input |
| دبوس 24 | RC2/AN14 — PORTC bit 2 / Analog input channel 14 |
| دبوس 25 | RC3/AN15 — PORTC bit 3 / Analog input channel 15 |
| دبوس 26 | RC4/AN16 — PORTC bit 4 / Analog input channel 16 |
| دبوس 27 | RC5/AN17 — PORTC bit 5 / Analog input channel 17 |
| دبوس 28 | RC6/AN18 — PORTC bit 6 / Analog input channel 18 |
| دبوس 29 | RC7/AN19 — PORTC bit 7 / Analog input channel 19 |
| دبوس 30 | VSS — Ground reference |
| دبوس 31 | VDD — Positive supply voltage |
| دبوس 32 | RD0/AN20 — PORTD bit 0 / Analog input channel 20 |
| دبوس 33 | RD1/AN21 — PORTD bit 1 / Analog input channel 21 |
| دبوس 34 | RD2/AN22 — PORTD bit 2 / Analog input channel 22 |
| دبوس 35 | RD3/AN23 — PORTD bit 3 / Analog input channel 23 |
| دبوس 36 | RD4/AN24 — PORTD bit 4 / Analog input channel 24 |
| دبوس 37 | RD5/AN25 — PORTD bit 5 / Analog input channel 25 |
| دبوس 38 | RD6/AN26 — PORTD bit 6 / Analog input channel 26 |
| دبوس 39 | RD7/AN27 — PORTD bit 7 / Analog input channel 27 |
| دبوس 40 | VSS — Ground reference |
| دبوس 41 | VDD — Positive supply voltage |
| دبوس 42 | RE0/AN5 — PORTE bit 0 / Analog input channel 5 (alt) |
| دبوس 43 | RE1/AN6 — PORTE bit 1 / Analog input channel 6 |
| دبوس 44 | RE2/AN7 — PORTE bit 2 / Analog input channel 7 |
التطبيقات النموذجية
PIC18F46K22-I/PT مناسب لـ 6 التطبيقs: Industrial Sensor Interface Module, Low-Power IoT Edge Node, HVAC Control Panel, BLDC Motor Driver Controller, USB-to-UART Bridge Dongle, Consumer Appliance Control Board.
Industrial Sensor Interface Module
The PIC18F46K22-I/PT's 12-bit ADC with up to 28 input channels and 64 KB of Flash makes it a strong fit for industrial sensor interface modules. With 64 MHz / 16 MIPS throughput, the MCU can sample multiple analog sensor channels and run calibration algorithms in real time. The 1.8-5.5 V supply range supports both 3.3 V and 5 V sensor rails without level shifting. Designers typically place the part near the sensor connector with 100 nF decoupling on each VDD/VSS pair, leveraging the 5-bit DAC for offset trim loops.
موصى به
Low-Power IoT Edge Node
For battery-powered IoT edge nodes, the PIC18F46K22-I/PT delivers nanoWatt XLP sleep currents as low as 50 nA, enabling multi-year coin-cell operation in sleep-dominant duty cycles. The 64 KB Flash accommodates over-the-air (OTA) bootloader plus application code with room to spare. The two MSSP ports support SPI flash and I2C sensor hubs, while the internal 16 MHz HFINTOSC eliminates the external crystal for further BOM reduction. Place a 32.768 kHz crystal on SOSCO/SOSCI for RTC timing.
موصى به
HVAC Control Panel
HVAC control panels benefit from the PIC18F46K22-I/PT's combination of 36 I/O pins, multiple timers, and robust industrial temperature range. The MCU can drive character LCDs, scan keypads, control triacs via zero-cross detection timers, and run PID fan algorithms. The two Enhanced USART modules support Modbus RTU master and slave stacks simultaneously. Operating voltage flexibility from 1.8-5.5 V allows direct connection to 24 VAC rectified supply rails with linear regulation.
موصى به
BLDC Motor Driver Controller
Brushless DC motor driver controllers leverage the PIC18F46K22-I/PT's five 16-bit timers and enhanced PWM capability. The MCU can generate six-step or field-oriented control (FOC) waveforms, sample back-EMF through the 12-bit ADC, and run current PI loops at high PWM rates. The 64 MIPS throughput supports real-time FOC with adequate margin for CAN or UART telemetry. Use the 5-bit DAC for reference generation and the internal comparator for overcurrent protection.
موصى به
USB-to-UART Bridge Dongle
A USB-to-UART bridge dongle based on the PIC18F46K22-I/PT uses the MSSP for SPI connection to an external USB-UART IC like the MCP2200 or MCP2221. The MCU provides the firmware glue, status LEDs, GPIO hand-shaking, and configurable baud rate handling via the Enhanced USART. With 64 KB Flash, the part can host CDC and vendor-class USB stacks directly without an external converter, while the 3.8 KB RAM is sufficient for small USB endpoint buffers.
موصى به
Consumer Appliance Control Board
Consumer appliance control boards (washers, dryers, dishwashers, ovens) frequently use the PIC18F46K22-I/PT for its balance of I/O count, Flash density, and low cost. The MCU drives segmented LED displays, reads capacitive touch sensors via the CTMU peripheral, and runs safety-critical state machines. Its -40C to +85C industrial temperature range covers appliance operating environments, and the 1.8-5.5 V range supports direct connection to rectified 5 V and 3.3 V rails.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC18F46K22-I/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC18F45K22-I/PT | PIC18F46K40-I/PT | PIC18F46Q10-I/PT | PIC18F46K22-E/PT |
|---|---|---|---|---|---|
| Package | 44-pin TQFP (PT) 10x10 mm | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 64 KB | 32 KB | 64 KB | 64 KB | 64 KB |
| Data RAM | 3.8 KB | 1.5 KB | 3.8 KB | 3.6 KB | 3.8 KB |
| Maximum Frequency | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) |
| Operating Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| ADC | 12-bit, 28 channels | 12-bit, 28 channels | 12-bit, 28 channels (with CIP) | 12-bit, 28 channels (updated) | 12-bit, 28 channels |
| Temperature Range | -40C to +85C (I grade) | -40C to +85C (I grade) | -40C to +85C (I grade) | -40C to +85C (I grade) | -40C to +125C (E grade) |
أبرز الفروقات
- 64 KB Flash / 3.8 KB RAM density tier in TQFP-44 package (مقابلPIC18F45K22-I/PT)
- Core Independent Peripherals (CIPs) for offloading CPU (مقابلPIC18F46K40-I/PT)
- Factory-recommended successor with long-term supply (مقابلPIC18F46Q10-I/PT)
ملاحظات التصميم
Estimated supply decoupling for PIC18F46K22-I/PT: place one 100 nF ceramic capacitor within 3 mm of each VDD/VSS pair (there are three VDD/VSS pairs on the 44-pin TQFP), plus one bulk 10 uF tantalum or ceramic at the regulator output. Total estimated BOM cost for decoupling is under $0.10 and ensures stable operation across the 1.8-5.5 V range. NanoWatt XLP sleep currents below 50 nA can only be achieved if all I/O pins are configured as analog or output-low before sleep entry per the datasheet.
Estimated thermal resistance for the 44-pin TQFP (PT) package is approximately 50 C/W theta_JA on a JEDEC 2-layer test board. At typical MCU core currents below 15 mA active and sub-microamp sleep, junction temperature rise is negligible even without dedicated copper pours. However, for designs pulling the I/O pins at maximum source/sink (25 mA per pin, 200 mA total), add at least 1 square inch of top-layer copper connected to the VSS thermal pad to keep the part within the -40C to +85C industrial range.
Route the ICSPDAT and ICSPCLK pins (RB6/RB7) to a 6-pin in-circuit programming header with at most 50 mm trace length and no series resistors; Microchip programmers expect direct access. Place the programming header at the PCB edge with a 0.1 inch (2.54 mm) pitch. If using the internal oscillator, leave the OSC1/OSC2 pins unconnected (RA6/RA7 become general-purpose I/O when CONFIG1H<FOSC> selects INTIO). Add a 4.7 kohm pull-up on MCLR to VDD through a diode-resistor network for proper reset behavior per datasheet Figure 2-2.
Common pitfalls: (1) failing to configure all unused I/O pins as outputs rather than inputs - floating inputs can cause shoot-through current and latch-up; (2) forgetting the CONFIG bits for the oscillator mode - incorrect FOSC settings can lock the part without an external crystal; (3) using the ADC without setting TRIS bits - ADC channel input pins must be configured as inputs via TRIS; (4) exceeding the absolute maximum VDD of 7.0 V on VDDT (the test pin) - it shares the VDD bus but has its own protection limits.
معلومات الامتثال
RoHS compliant per Microchip product page; not AEC-Q100 qualified (choose PIC18F46K22-E/PT for extended temperature). Halogen-free per Microchip environmental compliance documentation.