PIC18F46K22-I/ML - 64KB Flash 8-bit MCU 44-QFN | Microchip
料号： PIC18F46K22-I/ML ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.5268 | $4.53 |
| 10 | $4.18 | $41.80 |
| 100 | $3.78 | $378.00 |
| 500 | $3.4 | $1,700.00 |
| 1,000 | $3.08 | $3,080.00 |
PIC18F46K22-I/ML 概述
An 8-bit microcontroller (MCU) is a programmable processor core built around an 8-bit data path that integrates Flash program memory, SRAM, EEPROM, peripherals, and interrupt logic into a single chip. PIC18F devices use a Harvard RISC architecture with a 16-bit instruction word, giving them deterministic interrupt latency and strong code density for embedded C and assembly projects. They sit within the broader hierarchy of microcontrollers -> microcontrollers -> microcontrollers -> MCUs -> semiconductors, and bridge low-power peripherals with real-time control.
Key features include 16 MIPS throughput at 64 MHz, 1 KB of EEPROM, nanoWatt XLP sleep current typically below 100 nA, two rail-to-rail analog comparators with programmable on-chip voltage reference, up to 28 channels of mTouch capacitive touch sensing, two USART, two MSSP (SPI/I2C), and a 12-bit ADC with up to 28 channels. The charge-time measurement unit (CTMU) supports capacitive and ratiometric measurements, while the peripheral pin select (PPS) provides flexible signal routing.
Architecturally, the PIC18F46K22 uses an enhanced Harvard core with hardware multiply, a 31-level stack, and self-programmable Flash that allows bootloaders and on-the-fly firmware updates. The -I suffix indicates the industrial -40°C to +85°C temperature grade, and /ML denotes the 8x8 mm QFN-44 EP package with better thermal dissipation than a TQFP of the same die.
Typical applications include automotive body controllers, HVAC control panels, white-goods and appliance interfaces, low-power sensor nodes, capacitive touch user interfaces, and industrial control modules where 5V tolerance and EMI robustness matter. The wide operating voltage makes it tolerant of 3.3V and legacy 5V rails.
When designing with the PIC18F46K22-I/ML, ground the exposed pad (EP) to a continuous copper pour to meet the 31.6 C/W thermal resistance; leave at least 0.5 mm clearance on outer rows for solder wicking. Decouple VDD/VSS pairs with 100 nF X7R ceramics as close as possible to each pin pair. For migration planning, evaluate the PIC18F46Q10 family as Microchip's recommended modern successor.
直接替换替代料： PIC18F46K22-I/ML ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC18F46K22-I/ML （相同外形与封装尺寸） ——差异在于 Package, Program Memory (Flash), Timers, ADC, Core Architecture.
快速对比工具——选择替代料号进行并排对比：
PIC18F46K22-I/PT
✅ 直接替换✓ 有现货
$2.32 / 个
查看数据手册 →PIC18F45K22-I/ML
✅ 直接替换✓ 有现货
$2.65 / 个
查看数据手册 →PIC18F44K22-I/ML
✅ 直接替换✓ 有现货
$2.1 / 个
查看数据手册 →PIC18F46K22-E/ML
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$3.2 / 个
查看数据手册 →PIC18F46K20-I/ML
✅ 直接替换✓ 有现货
$3.52 / 个
查看数据手册 →PIC18F46K22T-I/ML
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F46K22-I/ML 最大额定值与电气特性
| Family | PIC18F XLP |
| Core Architecture | 8-bit PIC RISC |
| Program Memory (Flash) | 64 KB |
| RAM | 3968 B |
| EEPROM | 1024 B |
| Maximum CPU Frequency | 64 MHz |
| Performance (MIPS) | 16 MIPS |
| 电源电压 | 2.5 V to 5.5 V |
| 工作温度 | -40 C to +85 C (industrial) |
| ADC | 12-bit, up to 28 channels |
| Comparators | 2 rail-to-rail analog |
| Timers | 8-bit and 16-bit, multiple modules |
| Communication | 2x USART, 2x MSSP (SPI/I2C) |
| Capacitive Touch Channels | Up to 28 (mTouch) |
| 封装 | QFN-44 EP (ML) 8x8 mm |
| 引脚数量 | 44 |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| Automotive Qualification | AEC-Q100 qualified |
| Low-Power Technology | nanoWatt XLP |
PIC18F46K22-I/ML 引脚配置
| 引脚 1 | RE3/MCLR — Master Clear (reset) input or digital I/O RE3 |
| 引脚 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| 引脚 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| 引脚 4 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| 引脚 5 | RA3/AN3 — PORTA bit 3 / analog input 3 |
| 引脚 6 | RA4/AN4 — PORTA bit 4 / analog input 4 |
| 引脚 7 | RA5/AN5 — PORTA bit 5 / analog input 5 |
| 引脚 8 | RA6 — PORTA bit 6 |
| 引脚 9 | RA7 — PORTA bit 7 |
| 引脚 10 | VSS — Ground reference |
| 引脚 11 | VDD — Positive supply voltage |
| 引脚 12 | RB0/AN12 — PORTB bit 0 / analog input 12 |
| 引脚 13 | RB1/AN10 — PORTB bit 1 / analog input 10 |
| 引脚 14 | RB2/AN8 — PORTB bit 2 / analog input 8 |
| 引脚 15 | RB3/AN9 — PORTB bit 3 / analog input 9 |
| 引脚 16 | RB4/AN11 — PORTB bit 4 / analog input 11 |
| 引脚 17 | RB5/AN13 — PORTB bit 5 / analog input 13 |
| 引脚 18 | RB6/PGC — PORTB bit 6 / ICSP clock |
| 引脚 19 | RB7/PGD — PORTB bit 7 / ICSP data |
| 引脚 20 | VSS — Ground reference |
| 引脚 21 | VDD — Positive supply voltage |
| 引脚 22 | RC0/SOSCO — PORTC bit 0 / secondary oscillator output |
| 引脚 23 | RC1/SOSCI — PORTC bit 1 / secondary oscillator input |
| 引脚 24 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| 引脚 25 | RC3/SCL — PORTC bit 3 / I2C clock |
| 引脚 26 | RC4/SDA — PORTC bit 4 / I2C data |
| 引脚 27 | RC5/SDO — PORTC bit 5 / SPI data out |
| 引脚 28 | RC6/TX/CK — PORTC bit 6 / USART TX or clock |
| 引脚 29 | RC7/RX/DT — PORTC bit 7 / USART RX or data |
| 引脚 30 | VSS — Ground reference |
| 引脚 31 | VDD — Positive supply voltage |
| 引脚 32 | RD0 — PORTD bit 0 |
| 引脚 33 | RD1 — PORTD bit 1 |
| 引脚 34 | RD2 — PORTD bit 2 |
| 引脚 35 | RD3 — PORTD bit 3 |
| 引脚 36 | RD4 — PORTD bit 4 |
| 引脚 37 | RD5 — PORTD bit 5 |
| 引脚 38 | RD6 — PORTD bit 6 |
| 引脚 39 | RD7 — PORTD bit 7 |
| 引脚 40 | VSS — Ground reference |
| 引脚 41 | VDD — Positive supply voltage |
| 引脚 42 | RE0/AN5 — PORTE bit 0 / analog input 5 |
| 引脚 43 | RE1/AN6 — PORTE bit 1 / analog input 6 |
| 引脚 44 | RE2/AN7 — PORTE bit 2 / analog input 7 |
| 引脚 45 | EP — Exposed thermal pad - connect to VSS |
典型应用
PIC18F46K22-I/ML 适用于 6 应用s: Automotive Body Control Module, Capacitive Touch User Interface, Industrial HVAC Control Panel, Battery-Powered Sensor Node, White Goods Motor Controller, Medical Device User Interface.
Automotive Body Control Module
The PIC18F46K22-I/ML is well-suited for automotive body ECUs because it is AEC-Q100 qualified, supports 2.5V–5.5V rails from the vehicle 12V pre-regulated bus, and integrates two rail-to-rail comparators for switch debouncing. With 64 KB Flash and 3968 B RAM, it can host CAN-style communication stacks via the two MSSP peripherals and 16 MIPS performance enables real-time lighting and seat-control response. Its nanoWatt XLP sleep below 100 nA is critical for parked-current battery compliance.
推荐
Capacitive Touch User Interface
The mTouch and CTMU peripherals in the PIC18F46K22-I/ML enable up to 28 capacitive touch channels without an external touch IC. This makes the part a strong fit for white-goods, kitchen appliance, and consumer touch panels where BOM cost matters. The 12-bit ADC, 16 MIPS throughput, and 64 KB Flash accommodate modern GUI state machines with on-the-fly firmware updates through self-programmable Flash.
推荐
Industrial HVAC Control Panel
The PIC18F46K22-I/ML fits HVAC control panels because it integrates dual analog comparators, multiple PWM modules, and the PIC18 real-time control architecture. Industrial 24V pre-regulated rails step down to 5V, where the part's 2.5V–5.5V tolerance handles transients. nanoWatt XLP lets the panel enter sub-uA standby between user interactions while still waking instantly via mTouch or comparator interrupts.
推荐
Battery-Powered Sensor Node
The nanoWatt XLP technology gives the PIC18F46K22-I/ML a measured sleep current below 100 nA, while the RTC and periodic wake from Timer1 let it run for years on a 3V lithium cell. The 12-bit ADC with internal voltage reference, plus CTMU, supports ratiometric temperature and gas sensing. Two USART and two MSSP interfaces cover LoRa, BLE, or Wi-Fi module links for a sub-$5 sensor node.
推荐
White Goods Motor Controller
The PIC18F46K22-I/ML can drive small brushed DC or stepper motor control loops directly with its PWM, ECCP, and 12-bit ADC in washing machines, dishwashers, and refrigerators. The 16 MIPS throughput is enough for sensorless back-EMF commutation, while the QFN-44 EP package dissipates controller heat across the exposed pad. AEC-Q100 qualification also meets refrigerator compressor inverter qualification requirements.
推荐
Medical Device User Interface
For portable medical devices such as blood-pressure monitors, glucose meters, and pulse oximeters, the PIC18F46K22-I/ML provides the deterministic PIC18 interrupt latency needed for safety-critical measurement sequencing. The 12-bit ADC with internal 1.024V reference captures sensor data with <1 LSB linearity, while the 64 KB Flash supports IEC 62304 firmware audits. Low power extends battery life during standby.
推荐
推荐产品汇总
工程参考数据： PIC18F46K22-I/ML ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC18F46K22-I/PT | PIC18F45K22-I/ML | PIC18F44K22-I/ML | PIC18F46K22-E/ML | PIC18F46K20-I/ML |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | QFN-44 EP (ML) 8x8 mm | TQFP-44 (PT) 10x10 mm | QFN-44 EP (ML) 8x8 mm - same | QFN-44 EP (ML) 8x8 mm - same | QFN-44 EP (ML) 8x8 mm - same | QFN-44 EP (ML) 8x8 mm - same |
| Flash Memory | 64 KB | 64 KB | 32 KB (-50%) | 16 KB (-75%) | 64 KB | 32 KB (-50%) |
| RAM | 3968 B | 3968 B | 1536 B (-61%) | 768 B (-81%) | 3968 B | 1536 B (-61%) |
| CPU Frequency | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (extended) | -40 C to +85 C |
| AEC-Q100 | Qualified (Grade 3) | Qualified (Grade 3) | Qualified (Grade 3) | Qualified (Grade 3) | Qualified (Grade 1) | Qualified (Grade 3) |
关键差异点
- Same silicon in QFN-44 package （对比 PIC18F46K22-I/PT)
- Doubled Flash and RAM over the K20 predecessor （对比 PIC18F46K20-I/ML)
- Highest memory tier in K22 family （对比 PIC18F45K22-I/ML)
设计说明
Solder the QFN-44 EP exposed pad to a continuous copper pour using at least 4 thermal vias (0.3 mm drill, 0.6 mm pad) to a bottom-plane ground pour. This brings the thermal resistance to ~31.6 C/W as specified by Microchip datasheet DS41476. Without proper EP soldering, the part can overheat in continuous 64 MHz operation at high ambient temperatures.
Place a 100 nF X7R decoupling capacitor within 3 mm of every VDD pin pair (4 pairs total in QFN-44) and a single 10 uF bulk tantalum or ceramic on the main supply rail. The internal voltage regulator requires this bulk capacitance to handle nanoWatt XLP mode transitions when waking from sub-uA sleep to active 16 MIPS operation.
Configuration fuses (CONFIG words) control WDT, code-protect, oscillator, and low-voltage-programming settings; an unprogrammed device defaults to safe slow RC mode. Always set CONFIG1L for proper FOSC selection - leaving the default blocks PLL and prevents 64 MHz operation. Program CONFIG7L CONFIG7H for read protection only after firmware is fully verified.
Route the ICSP pins (RB6/PGC, RB7/PGD) to a 6-pin 0.1 inch header on the PCB edge for in-circuit programming and debug. Keep the trace length under 50 mm and use a 4.7 kohm pull-up on MCLR to VDD to avoid spurious resets in electrically noisy environments like motor drive stages.
合规信息
AEC-Q100 Grade 3 qualified per datasheet DS41476 and Microchip product page. RoHS and lead-free confirmed via distributor stock listings.
