PIC18F45K40-E/ML - 8-Bit 64MHz 32KB Flash MCU QFN-44 | Microchip
料号： PIC18F45K40-E/ML ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.4 | $2.40 |
| 10 | $2.16 | $21.60 |
| 100 | $1.92 | $192.00 |
| 500 | $1.68 | $840.00 |
| 1,000 | $1.44 | $1,440.00 |
PIC18F45K40-E/ML 概述
An 8-bit microcontroller (MCU) is a single-chip computer that combines an 8-bit CPU, program memory (Flash/ROM), data memory (RAM), and peripheral interfaces on one die. PIC18F-series MCUs sit within the broader hierarchy: 8-bit microcontroller -> microcontroller -> embedded controller -> semiconductor. They are characterized by Harvard architecture, deterministic instruction execution, and mature toolchains (MPLAB X IDE, XC8 compiler), making them ideal for cost-sensitive and low-power applications.
Key features of the PIC18F45K40-E/ML include Core Independent Peripherals (CIPs) such as the Complementary Waveform Generator (CWG), Windowed Watchdog Timer (WWDT), and Configurable Logic Cell (CLC), which offload tasks from the CPU. The eXtreme Low Power (XLP) technology enables deep sleep currents as low as nA, and 5 V tolerance on digital I/O allows direct interface to legacy industrial buses without level shifters.
The device uses a modified Harvard architecture with a 16-bit instruction word and an 8-bit data path, delivering up to 16 MIPS at 64 MHz. The 32 KB self-programmable Flash supports in-application programming (IAP) and the 256-byte EEPROM provides byte-level non-volatile storage for user settings such as calibration constants.
Typical applications include industrial control (sensor interfacing, motor control with CWG), consumer electronics (HMI with segmented LCD driving), IoT edge nodes, automotive body controllers (with PIC18F45K40-E/ML ext-grade variants), and battery-powered metering. The wide 2.3-5.5 V range supports both 3.3 V and 5 V designs.
When designing with this part, pay attention to decoupling: place 100 nF ceramic capacitors adjacent to every VDD/VSS pair, and add a 10 µF bulk capacitor near the IC. The exposed thermal pad on the QFN-44 package must be soldered to a ground copper pour to meet thermal and electrical specifications.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, providing engineers with consolidated selection guidance.
直接替换替代料： PIC18F45K40-E/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： PIC18F45K40-E/ML （相同外形与封装尺寸） ——差异在于 ADC, Comparators, Package, Core Architecture, DAC.
快速对比工具——选择替代料号进行并排对比：
PIC18F45K40-I/ML
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F46K40-I/ML
✅ 直接替换✓ 有现货
$2.55 / 个
查看数据手册 →PIC18F45K40T-I/ML
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PIC18F45K22-I/ML
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.65 / 个
查看数据手册 →PIC18F45K40-E/MV
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.51 / 个
查看数据手册 →PIC18F45K40-E/ML 最大额定值与电气特性
| Core Architecture | PIC18, 8-bit RISC |
| 最大时钟频率 | 64 MHz |
| Program Memory (Flash) | 32 KB (32768 bytes) |
| Data RAM | 2 KB (2048 bytes) |
| Data EEPROM | 256 bytes |
| Operating Voltage Range | 2.3 V to 5.5 V |
| 封装 | QFN-44 (ML) 8x8 mm with exposed pad |
| 安装类型 | Surface Mount |
| 工作温度范围 | -40 C to +125 C (Extended, -E suffix) |
| ADC | 10-bit ADC2 (with Computation) |
| DAC | 5-bit DAC |
| Comparators | Yes |
| PWM Channels | Yes (CCP, CWG) |
| I/O Pins | 36 |
| Core Independent Peripherals | CWG, WWDT, CRC/SCAN, HLT, CLC |
| Instruction Set | PIC18 (16-bit instructions) |
| RoHS 状态 | Compliant |
PIC18F45K40-E/ML 引脚配置
| 引脚 1 | RA2 — Port A bit 2 (analog/digital I/O) |
| 引脚 2 | RA3 — Port A bit 3 (analog/digital I/O) |
| 引脚 3 | RA4 — Port A bit 4 (analog/digital I/O) |
| 引脚 4 | RA5 — Port A bit 5 (analog/digital I/O) |
| 引脚 5 | RA6 — Port A bit 6 (analog/digital I/O) |
| 引脚 6 | RA7 — Port A bit 7 (analog/digital I/O) |
| 引脚 7 | VSS — Ground |
| 引脚 8 | VDD — Positive supply |
| 引脚 9 | RA0 — Port A bit 0 (analog/digital I/O) |
| 引脚 10 | RA1 — Port A bit 1 (analog/digital I/O) |
| 引脚 11 | RB0 — Port B bit 0 (interrupt-on-change) |
| 引脚 12 | RB1 — Port B bit 1 (interrupt-on-change) |
| 引脚 13 | RB2 — Port B bit 2 (interrupt-on-change) |
| 引脚 14 | RB3 — Port B bit 3 (interrupt-on-change) |
| 引脚 15 | RB4 — Port B bit 4 (interrupt-on-change) |
| 引脚 16 | RB5 — Port B bit 5 (interrupt-on-change) |
| 引脚 17 | RB6 — Port B bit 6 (ICSCLK / interrupt-on-change) |
| 引脚 18 | RB7 — Port B bit 7 (ICSDAT / interrupt-on-change) |
| 引脚 19 | VSS — Ground |
| 引脚 20 | VDD — Positive supply |
| 引脚 21 | RC0 — Port C bit 0 (digital I/O) |
| 引脚 22 | RC1 — Port C bit 1 (digital I/O) |
| 引脚 23 | RC2 — Port C bit 2 (digital I/O) |
| 引脚 24 | RC3 — Port C bit 3 (digital I/O) |
| 引脚 25 | RC4 — Port C bit 4 (digital I/O) |
| 引脚 26 | RC5 — Port C bit 5 (digital I/O) |
| 引脚 27 | RC6 — Port C bit 6 (digital I/O) |
| 引脚 28 | RC7 — Port C bit 7 (digital I/O) |
| 引脚 29 | RE3 — Port E bit 3 (MCLR/ICSP programming) |
| 引脚 30 | VSS — Ground |
| 引脚 31 | VDD — Positive supply |
| 引脚 32 | RD0 — Port D bit 0 (digital I/O) |
| 引脚 33 | RD1 — Port D bit 1 (digital I/O) |
| 引脚 34 | RD2 — Port D bit 2 (digital I/O) |
| 引脚 35 | RD3 — Port D bit 3 (digital I/O) |
| 引脚 36 | RD4 — Port D bit 4 (digital I/O) |
| 引脚 37 | RD5 — Port D bit 5 (digital I/O) |
| 引脚 38 | RD6 — Port D bit 6 (digital I/O) |
| 引脚 39 | RD7 — Port D bit 7 (digital I/O) |
| 引脚 40 | VSS — Ground |
| 引脚 41 | VSS — Ground |
| 引脚 42 | VDD — Positive supply |
| 引脚 43 | NC — Not connected (per datasheet) |
| 引脚 44 | EP — Exposed thermal pad - connect to VSS |
典型应用
PIC18F45K40-E/ML 适用于 6 应用s: Industrial Sensor Interface Controller, Battery-Powered IoT Edge Node, Automotive Body and Interior Module, Consumer Human-Machine Interface (HMI), Motor Control and PWM Driver, Smart Metering and Energy Monitoring.
Industrial Sensor Interface Controller
The PIC18F45K40-E/ML fits industrial sensor interface controllers thanks to its 10-bit ADC2 with computation, five-bit DAC, and Core Independent Peripherals that offload averaging from the CPU. Its 2.3 V to 5.5 V supply range tolerates 24 V industrial buses after external regulation, and the -40 to +125 C extended temperature range handles factory-floor thermal stress. A 32 KB Flash budget supports Modbus RTU or IO-Link device stacks, while 2 KB RAM buffers sensor samples before transmission. The CWG peripheral generates precision excitation waveforms for bridge sensors such as load cells and strain gauges. Compared with discrete op-amp+ADC solutions, the integrated ADC2 reduces BOM cost and PCB area. Reference design: PIC18F45K40 Curiosity Nano board (DM182027) accelerates prototyping.
推荐
Battery-Powered IoT Edge Node
The PIC18F45K40-E/ML is well matched to battery-powered IoT edge nodes because of its eXtreme Low Power (XLP) technology, which delivers sleep currents in the nA range and active currents around 100 µA/MHz at 1.8 V. The Windowed Watchdog Timer (WWDT) and Hardware Limit Timer (HLT) provide autonomous supervision without waking the CPU. Peripheral Pin Select (PPS) allows flexible signal routing to minimize external wiring. The 32 KB Flash holds a lightweight LoRaWAN or BLE-beacon protocol stack, while the 256-byte EEPROM stores device credentials. At an average 0.1% duty cycle, a CR2032 cell can power the node for several years. The QFN-44 (ML) package with exposed pad provides low thermal resistance and compact PCB area.
推荐
Automotive Body and Interior Module
Automotive body and interior modules benefit from the PIC18F45K40-E/ML extended temperature grade (-40 to +125 C) and rich Core Independent Peripherals. The CWG drives MOSFET half-bridges for window lifters and seat adjusters, while the CCP/PWM modules control LED backlighting with smooth dimming. The 10-bit ADC2 with computation oversamples battery voltage and current sensors for state-of-charge estimation. LIN bus connectivity is implemented via the EUSART and a LIN software stack in Flash. Note: for AEC-Q100 qualification, Microchip offers the PIC18F45K40-E/ML ext-grade but designers should verify with the manufacturer whether specific automotive PPAP documentation is required for the target tier.
推荐
Consumer Human-Machine Interface (HMI)
The PIC18F45K40-E/ML serves consumer HMI panels (appliance controls, smart thermostats) by combining capacitive touch via the on-chip comparators, PWM for LED indicators, and UART for display driver ICs. Its 5 V-tolerant I/O interfaces directly to legacy LED segment drivers, and the 32 KB Flash holds a touch-sensing library plus UI state machine. The CLC peripheral implements custom logic (e.g., button de-bounce, glitch filters) without external gates, reducing BOM cost. With 2 KB RAM, the part drives small graphical menus stored in external SPI Flash. The QFN-44 8x8 mm footprint fits behind touch panels in tight form factors.
推荐
Motor Control and PWM Driver
Motor control applications such as small BLDC fans, pumps, and hobby servos benefit from the PIC18F45K40-E/ML Complementary Waveform Generator (CWG), which produces complementary PWM outputs with programmable dead time for driving half-bridges. The 10-bit ADC2 samples back-EMF for sensorless commutation, while the 5-bit DAC sets reference thresholds. The 64 MHz CPU (16 MIPS) executes field-oriented control (FOC) loops in firmware. The CLC generates hardware interlocks for overcurrent protection, and the WWDT ensures the firmware recovers from fault conditions. The QFN-44 exposed pad provides thermal dissipation for moderate continuous motor currents under 1 A.
推荐
Smart Metering and Energy Monitoring
Smart electricity meters and sub-metering modules use the PIC18F45K40-E/ML for its high-resolution ADC2 (oversampling to ~12-bit effective), 32 KB Flash for IEC 62056 / DLMS data structures, and 256-byte EEPROM for tariff table storage. The CLC implements tamper-detection logic by comparing voltage and current phase relationships in hardware, freeing the CPU for metrology calculations. The extended -40 to +125 C rating supports outdoor meter enclosures. The on-chip 5-bit DAC generates calibration offsets during production testing. The QFN-44 footprint allows compact PCB layouts alongside shunt resistors and current transformers.
推荐
推荐产品汇总
工程参考数据： PIC18F45K40-E/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 | PIC18F45K40-I/ML | PIC18F46K40-I/ML | PIC18F45K40T-I/ML | PIC18F45K22-I/ML |
|---|---|---|---|---|---|
| Package | QFN-44 (ML) 8x8 mm | QFN-44 (ML) - same | QFN-44 (ML) - same | QFN-44 (ML) - same | QFN-44 (ML) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | PIC18 8-bit, 64 MHz | PIC18 8-bit, 64 MHz | PIC18 8-bit, 64 MHz | PIC18 8-bit, 64 MHz | PIC18 8-bit, 64 MHz |
| Flash Program Memory | 32 KB | 32 KB | 64 KB | 32 KB | 32 KB |
| Data RAM | 2 KB | 2 KB | 4 KB | 2 KB | 1.5 KB |
| Data EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Temperature Grade | Extended -40 to +125 C | Industrial -40 to +85 C | Industrial -40 to +85 C | Industrial -40 to +85 C | Industrial -40 to +85 C |
| Core Independent Peripherals | CWG, CLC, WWDT, ADC2, HLT, SCAN/CRC | CWG, CLC, WWDT, ADC2, HLT, SCAN/CRC | CWG, CLC, WWDT, ADC2, HLT, SCAN/CRC | CWG, CLC, WWDT, ADC2, HLT, SCAN/CRC | Limited (no CLC, ADC2, HLT, SCAN/CRC) |
关键差异点
- Richest Core Independent Peripheral (CIP) set in PIC18F 44-pin class （对比 PIC18F45K22-I/ML)
- Extended temperature range vs I-grade alternatives （对比 PIC18F45K40-I/ML)
- Larger memory headroom than direct Flash-size peers （对比 PIC18F45K22-I/ML)
设计说明
Place a 100 nF ceramic decoupling capacitor within 3 mm of each VDD pin (QFN-44 has multiple VDD/VSS pairs on pins 8/7, 20/19, 31/30, and 42/40). Add a single 10 µF bulk tantalum or ceramic capacitor near the IC. For low-noise analog performance, separate AVDD/AVSS pins (not present on this part; AVCC is internally tied) by using a ferrite bead to isolate the digital supply. Keep the exposed thermal pad (pin 44) soldered to a VSS copper pour of at least 1 square cm for thermal dissipation and ground return.
Common design pitfalls with the PIC18F45K40-E/ML include: (1) omitting the 10 kohm pull-up on MCLR (pin 1) which prevents reliable reset; (2) failing to populate the 10 µF bulk cap near the IC, causing brown-out during inrush; (3) leaving ICSCLK/ICSDAT (RB6/RB7) without consideration for in-circuit programming access; (4) confusing the -E extended temperature suffix with -I industrial (E=-40 to +125 C, I=-40 to +85 C). Always order the correct suffix for the target environment.
For QFN-44 (ML) PCB layout, use a 0.4 mm pitch land pattern with 0.2 mm x 0.5 mm thermal pad openings per IPC-7351. The exposed pad must be soldered with stencil apertures covering 50-70% of the pad area to ensure proper solder joint formation. Place a ground plane directly under the IC spanning at least 2x the package area. Keep high-speed signals (PWM, oscillator) short and routed over a continuous ground plane. The 16 MHz HFINTOSC internal oscillator is sufficient for most applications; if using an external crystal, keep traces within 5 mm and surround with a guard ring.
合规信息
RoHS and lead-free confirmed per Microchip product page. AEC-Q100 is not formally qualified at the automotive tier; -E extended temperature grade supports automotive body/interior use cases where AEC-Q100 PPAP documentation is not required. Confirm with Microchip factory for specific automotive program requirements.
