PIC18F45K40-E/MV - 32KB Flash 8-bit MCU, 40-UQFN | Microchip
MPN: PIC18F45K40-E/MV ✓ Hoạt độngPIC18F45K40-E/MV Tóm tắt
What is a PIC18F Microcontroller? A PIC18F is an 8-bit Harvard-architecture CMOS microcontroller from Microchip's enhanced mid-range family, featuring a RISC core with 16-bit instructions and 8-bit data path. PIC18F devices occupy the LDO -> linear regulator product hierarchy analogue within the MCU taxonomy: 8-bit MCU -> microcontroller -> embedded controller -> semiconductor. They are designed for deterministic real-time control, low power consumption, and ease of programming via MPLAB X IDE.
Key features include eXtreme Low Power (XLP) technology with deep-sleep currents typically below 1 µA, 36 digital I/O pins with Peripheral Pin Select (PPS), four 16-bit timers, two I2C/SPI ports, two UART/USART modules with LIN support, a 10-bit ADC with up to 35 channels, and Core Independent Peripherals (CIPs) such as Complementary Waveform Generator (CWG), Windowed Watchdog Timer (WWDT), and CRC/Memory Scan.
The device uses an enhanced Harvard architecture with a 16-bit instruction word, 8-bit data bus, hardware multiply, and 31-level stack. Internal oscillator accuracy is factory calibrated to ±1% across 0-70 °C and ±2% over -40 to +125 °C, eliminating external crystals in many cost-sensitive designs. The integrated 5-bit DAC and rail-to-rail input comparators enable signal-conditioning tasks without external components.
Typical applications include industrial sensor nodes, home appliances, automotive body controllers, LED lighting drivers, low-power IoT edge devices, battery chargers, and consumer handheld products. The 5V tolerant I/O simplifies interfacing to legacy 5V peripherals and modules without level shifters.
When designing with this part, allocate the PPS mapping early - each peripheral function can be routed to multiple I/O pins. Ensure decoupling capacitors are placed within 3 mm of VDD pins and the exposed thermal pad (on UQFN packages) is soldered to the ground plane for thermal dissipation and electrical performance.
This page synthesizes distributor pricing, drop-in alternatives from the same PIC18F K40 family, and practical design notes that complement the manufacturer datasheet with selection guidance, comparison data, and verified cross-references not aggregated on a single OEM or distributor page.
Bộ thay thế dễ dàng lắp đặt cho PIC18F45K40-E/MV — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC18F45K40-E/MV (cùng hình factor và footprint) — khác nhau ở ADC, Package, Program Memory (Flash), Comparators, Operating Voltage Range.
PIC18F45K40-I/MV
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F45K40-E/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F46K40-E/MV
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F26K40-E/MV
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F44K20-E/MV
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F44K22-E/MV
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F45K40-E/MV Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC18 8-bit RISC enhanced Harvard |
| CPU Speed | 64 MHz (16 MIPS) |
| Program Memory (Flash) | 32 KB |
| RAM | 2 KB |
| EEPROM | 256 B |
| Hộp | 40-pin UQFN (5x5 mm) |
| Operating Voltage | 1.8 V to 5.5 V |
| I/O Pins | 36 |
| ADC | 10-bit, up to 35 channels |
| DAC | 5-bit |
| Comparators | 2 with rail-to-rail input |
| Timers | 4x 16-bit, 2x 8-bit |
| CCP/PWM | 2 CCP, 2 PWM (10-bit) |
| Communication | 2x UART, 2x I2C, 2x SPI |
| Peripheral Pin Select (PPS) | Yes |
| Core Independent Peripherals | CWG, WWDT, CRC/Memory Scan, HLT |
| XLP Sleep Current | < 1 µA (typical) |
| Nhiệt độ hoạt động | -40 °C to +125 °C (Extended) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Cấp MSL | 1 |
Cấu hình chân PIC18F45K40-E/MV
| Chân 1 | RA2 — Bidirectional I/O with PPS; analog input AN2 |
| Chân 2 | RA3 — Bidirectional I/O with PPS; analog input AN3 |
| Chân 3 | RA4 — Bidirectional I/O with PPS; analog input AN4 |
| Chân 4 | RA5 — Bidirectional I/O with PPS; analog input AN5 |
| Chân 5 | RA6 — Bidirectional I/O with PPS; analog input AN6 |
| Chân 6 | RA7 — Bidirectional I/O with PPS; analog input AN7 |
| Chân 7 | VSS — Ground reference |
| Chân 8 | VDD — Positive supply voltage |
| Chân 9 | RA1 — Bidirectional I/O with PPS; analog input AN1 |
| Chân 10 | RA0 — Bidirectional I/O with PPS; analog input AN0 |
| Chân 11 | OSC1 — External crystal/oscillator input |
| Chân 12 | OSC2 — External crystal/oscillator output |
| Chân 13 | RC0 — Bidirectional I/O with PPS |
| Chân 14 | RC1 — Bidirectional I/O with PPS |
| Chân 15 | RC2 — Bidirectional I/O with PPS |
| Chân 16 | RC3 — Bidirectional I/O with PPS |
| Chân 17 | RC4 — Bidirectional I/O with PPS |
| Chân 18 | RC5 — Bidirectional I/O with PPS |
| Chân 19 | RC6 — Bidirectional I/O with PPS |
| Chân 20 | RC7 — Bidirectional I/O with PPS |
| Chân 21 | VSS — Ground reference |
| Chân 22 | VDD — Positive supply voltage |
| Chân 23 | RB0 — Bidirectional I/O with PPS; interrupt-on-change |
| Chân 24 | RB1 — Bidirectional I/O with PPS; interrupt-on-change |
| Chân 25 | RB2 — Bidirectional I/O with PPS; interrupt-on-change |
| Chân 26 | RB3 — Bidirectional I/O with PPS; interrupt-on-change |
| Chân 27 | RB4 — Bidirectional I/O with PPS; interrupt-on-change |
| Chân 28 | RB5 — Bidirectional I/O with PPS; interrupt-on-change |
| Chân 29 | RB6 — Bidirectional I/O with PPS; interrupt-on-change |
| Chân 30 | RB7 — Bidirectional I/O with PPS; interrupt-on-change |
| Chân 31 | AVSS — Analog ground reference |
| Chân 32 | AVDD — Analog positive supply voltage |
| Chân 33 | MCLR — Master Clear reset input (active-low) |
| Chân 34 | RE0 — Bidirectional I/O with PPS |
| Chân 35 | RE1 — Bidirectional I/O with PPS |
| Chân 36 | RE2 — Bidirectional I/O with PPS |
| Chân 37 | RD0 — Bidirectional I/O with PPS |
| Chân 38 | RD1 — Bidirectional I/O with PPS |
| Chân 39 | RD2 — Bidirectional I/O with PPS |
| Chân 40 | RD3 — Bidirectional I/O with PPS |
Ứng dụng tiêu biểu
PIC18F45K40-E/MV phù hợp cho 7 Áp dụngs: Industrial Sensor Node, Home Appliance Control Board, Automotive Body Controller, LED Lighting Driver, Battery-Powered IoT Edge Device, Consumer Handheld Product, Battery Charger / Power Bank Controller.
Industrial Sensor Node
The PIC18F45K40-E/MV is an ideal controller for industrial 4-20 mA sensor nodes and remote telemetry units. Its 10-bit ADC with up to 35 input channels directly digitizes multiple analog sensors (temperature, pressure, humidity) without external muxes, while the 5-bit DAC and rail-to-rail comparators implement threshold detection. The 1.8 V to 5.5 V supply range accepts 24V industrial bus rails via simple LDO pre-regulation. XLP sleep current below 1 µA enables battery-backed operation for years, and the 64 MHz throughput allows aggressive duty cycling. The 36 I/O with Peripheral Pin Select (PPS) routes UART, I2C, and SPI to any pins, simplifying PCB layout for compact sensor enclosures.
Được đề xuất
Home Appliance Control Board
For white-good appliances such as washing machines, dishwashers, and microwave ovens, the PIC18F45K40-E/MV delivers the deterministic 5V-tolerant I/O and motor-control peripherals needed to drive brushed DC motors, triac-controlled AC loads, and segmented LCD displays. The Complementary Waveform Generator (CWG) and 10-bit PWM peripherals synthesize half-bridge drive signals for MOSFETs, while the 2 CCP modules handle encoder feedback. With 32 KB of Flash and 2 KB of RAM, application code for user-interface state machines, fault diagnostics, and energy-mode management fits comfortably. The -40 to +125 °C extended grade supports inside-appliance environments where ambient temperatures can exceed 70 °C.
Được đề xuất
Automotive Body Controller
In automotive body-electronics modules - mirror controllers, seat-position modules, climate-control panels, and lighting drivers - the PIC18F45K40-E/MV provides the extended-temperature reliability, 5V tolerance, and rich peripheral integration needed. The two UART modules support LIN bus communication with body-control master ECUs, while the two I2C interfaces connect to sensor and EEPROM peripherals. Core Independent Peripherals (CIPs) such as Windowed WDT and CRC/Memory Scan add functional-safety features required by OEM qualification. Operating current in sleep mode below 1 µA is critical for parked-vehicle quiescent-current budgets, and the 5V I/O tolerates load-dump transients up to the absolute-maximum ratings.
Được đề xuất
LED Lighting Driver
For commercial and architectural LED lighting drivers, the PIC18F45K40-E/MV combines the peripherals needed to implement constant-current PWM dimming, DALI or 0-10 V control interfaces, and color-mixing algorithms. The 10-bit PWM and CWG generate flicker-free dimming down to 0.1%, while two UART channels implement DMX512 or DALI receive. The 35-channel 10-bit ADC reads multiple photodiode/thermistor inputs for closed-loop lumen and thermal-folding control. The XLP technology enables battery-backed wireless control nodes that run for years on a single CR2032, and the 5V I/O simplifies interfacing to mains-side triac dimmer circuits.
Được đề xuất
Battery-Powered IoT Edge Device
The PIC18F45K40-E/MV's XLP technology delivers sleep currents below 1 µA with multiple wake-up sources including RTC, WDT, and external interrupts, making it well-suited for battery-powered IoT edge nodes such as environmental monitors, smart locks, and remote controls. The 16 MIPS throughput handles encryption, sensor fusion, and protocol-stack tasks between sleep cycles. Operating voltage down to 1.8 V permits direct connection to depleted Li-ion or 2xAA packs, while the integrated 10-bit ADC reads battery voltage for coulomb-counting fuel-gauges. PPS flexibility allows routing the radio's SPI/UART to convenient pins, and the 32 KB Flash accommodates over-the-air (OTA) bootloader plus application code.
Được đề xuất
Consumer Handheld Product
For consumer handhelds such as remote controls, e-readers, toys, and personal-care devices, the PIC18F45K40-E/MV balances cost, peripheral count, and power efficiency. The 64 MHz core drives responsive user-interface graphics on low-cost OLED or segment LCDs, while PWM channels generate audio tones and vibration-motor drive. The integrated 5-bit DAC synthesizes simple audio cues without external DAC ICs, and the 2 KB RAM supports menu state machines and protocol stacks. With <1 µA sleep current, devices idle for months on a single AAA cell, and 5V-tolerant I/O simplifies interfacing to legacy accessories and chargers.
Được đề xuất
Battery Charger / Power Bank Controller
The PIC18F45K40-E/MV can act as the supervisory MCU in single-cell Li-ion chargers, power banks, and USB-PD controller boards. The 10-bit ADC monitors VBUS voltage, battery voltage, charge current, and temperature, while PWM channels drive the power-converter feedback loop or load-sharing FETs. The two I2C ports interface to the fuel-gauge IC and USB-PD controller, and the two UART channels communicate with QC/PD protocol handshaking chips. The wide 1.8 V to 5.5 V supply accepts direct 5V USB VBUS, and the XLP idle modes allow standby power consumption well under USB suspend limits.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F45K40-E/MV — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC18F45K40-I/MV | PIC18F46K40-E/MV | PIC18F26K40-E/MV | PIC18F44K22-E/MV |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-UQFN (5x5 mm) | 40-UQFN (5x5 mm) | 40-UQFN (5x5 mm) | 28-UQFN | 40-UQFN (5x5 mm) |
| Flash Memory | 32 KB | 32 KB | 64 KB | 32 KB | 16 KB |
| RAM | 2 KB | 2 KB | 4 KB | 2 KB | 1 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B |
| CPU Speed | 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 +125 °C (Extended) | -40 °C to +85 °C (Industrial) | -40 °C to +125 °C (Extended) | -40 °C to +125 °C (Extended) | -40 °C to +125 °C (Extended) |
| I/O Pins | 36 | 36 | 36 | 24 | 36 |
Bảo phân biệt quan trọng
- Extended temperature grade for harsh environments (vsPIC18F45K40-I/MV)
- Compact 40-UQFN (5x5 mm) package option (vsPIC18F45K40-E/PT (TQFP-44))
- Full CIP integration including CWG, WWDT, CRC/Memory Scan (vsPIC18F44K22-E/MV)
Ghi chú thiết kế
Decouple every VDD/AVDD pin pair with a 100 nF ceramic capacitor placed within 3 mm of the IC pins; add a bulk 4.7 µF to 10 µF tantalum or ceramic on each power rail. The 40-UQFN exposed thermal pad (EP) must be soldered to a continuous ground plane using an array of thermal vias - this provides both electrical ground return and heat dissipation. Place the ICSP programming header on a 6-pin 0.1-inch header or 4-pin Tag-Connect footprint with PGD/PGC/VPP/GND routing matched within 50 mm to avoid programming failures.
Do not leave unused I/O pins floating - configure them as outputs driving low or enable the internal weak pull-ups to avoid excess current draw and spurious interrupts. The MCLR pin must have a 10 kΩ pull-up to VDD; failure to do so results in unreliable reset behavior. When using the internal HFINTOSC, avoid changing the OSCCON register while peripherals are active without the PLL-enabled clock transition sequence. Estimated: typical ICC consumption is ~1.5 mA at 64 MHz with all peripherals off, rising to ~7 mA with ADC + PWM active.
Route analog AVSS/AVDD separately from digital VDD/VSS using a star-ground topology at the MCU, with AVDD filtered through a ferrite bead or 10 Ω resistor. Keep ADC analog traces away from PWM and switching signals, and place the analog input RC filter (typically 100 Ω + 100 nF) within 10 mm of the input pin. For PPS-routed peripherals, prefer grouping SPI/UART signals on adjacent PORTB/C pins to minimize skew and avoid splitting PPS assignments across ports when high-speed signals are involved.
Estimated: at 64 MHz active mode with all peripherals enabled, ICC is approximately 7-9 mA at 5V; in sleep mode with RTCC running, ICC drops below 1 µA. Use the IDLE and DOZE power-managed modes to throttle the CPU clock while peripherals continue running. For battery applications, enable the Windowed WDT (WWDT) instead of the standard WDT - it allows time-bounded servicing that prevents runaway code from draining the battery. The brown-out reset (BOR) should always be enabled with VDD falling threshold set per application.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product declaration. The -E/MV is Extended temperature grade but is NOT AEC-Q100 qualified - automotive designs requiring AEC-Q100 should use the PIC18F45K40-E/MVVAO or PIC18F46K40-E/MV variants. MSL-1 rated per JEDEC J-STD-020.
