PIC18LF45K40-E/PT - 8-Bit 64MHz 32KB Flash MCU | Microchip
MPN： PIC18LF45K40-E/PT ✓ 啟用中PIC18LF45K40-E/PT 概覽
What is a microcontroller? A microcontroller is a single-chip computer that integrates a CPU core, non-volatile program memory (typically Flash), working RAM, and a rich set of on-chip peripherals such as timers, ADC/DAC, communication interfaces and interrupt controllers. Within the broader semiconductor taxonomy, a microcontroller belongs to the class of embedded processors -> microcontrollers -> 8-bit microcontrollers. Microchip's PIC18F family targets low-power, general-purpose embedded designs using a modified Harvard RISC architecture with 16-bit opcodes and 8-bit data.
Key features of the PIC18LF45K40-E/PT include the eXtreme Low Power (XLP) technology with typical sleep currents in the nanoampere range, an integrated 64 MHz internal oscillator that eliminates an external crystal in many designs, and a 10-bit ADC with computation (ADC2) for automated averaging and threshold comparisons. The CWG peripheral can synthesize dead-band-controlled complementary PWM outputs for half-bridge driver stages without CPU intervention.
The architecture uses a 16-bit instruction word with an 8-bit data path, 31-level hardware stack, and a priority-level interrupt controller. The device supports self-programmability and a Dual In-line Programming (ICSP) interface, plus an enhanced PMP/EPSP for parallel bus interfaces to external memory or graphics LCDs.
Typical applications include low-power IoT sensor nodes, battery-powered handheld instruments, consumer appliance controllers, industrial HMI touch pads, and LED lighting control. The wide operating voltage range allows direct connection to 2-cell battery stacks or regulated 3.3 V rails.
A key design consideration is selecting between LF (1.8-3.6 V) and F (2.3-5.5 V) variants to match the system rail. LF parts are mandatory for coin-cell and Li-Ion discharged applications; F parts allow direct 5 V operation. Per the Microchip datasheet, supply decoupling requires 100 nF plus 1 µF ceramic capacitors placed within 5 mm of VDD/AVDD pins.
This page synthesizes distributor pricing, drop-in PIC18 alternatives, and practical design notes not consolidated in the manufacturer datasheet.
直接替換替代品，適用於 PIC18LF45K40-E/PT — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC18LF45K40-E/PT （相同外形與佔位） — 差異在於 ADC, Package, Communication, Operating Temperature, Core.
PIC18F45K40-E/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18LF45K40-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18LF45K40-E/MV
✅ 直接替換聯絡詢價
查看資料表 →PIC18LF45K22-I/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18LF45J50-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18LF4580-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18LF45K40-E/PT 最大額定值與電氣特性
| Core | PIC18 (8-bit, modified Harvard RISC, 16-bit instruction word) |
| CPU Speed | 64 MHz (16 MIPS) |
| Program Memory (Flash) | 32 KB (16K x 16) |
| RAM | 2 KB |
| EEPROM | 256 bytes |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| I/O Pins | 36 |
| 封裝 | 44-pin TQFP (PT) 10x10 mm |
| ADC | 10-bit, with Computation (ADC2) |
| DAC | 5-bit, 1 channel |
| Timers | Multiple 8-bit and 16-bit timers |
| PWM Outputs | Yes (CCP, ECCP) |
| Complementary Waveform Generator (CWG) | Yes |
| Windowed Watchdog Timer (WWDT) | Yes |
| CRC/SCAN | Yes |
| Operating Temperature (E suffix) | -40C to +125C |
| 安裝類型 | Surface Mount |
| MSL 等級 | 3 |
| RoHS 狀態 | Compliant |
PIC18LF45K40-E/PT 腳位配置
| 腳位 1 | RC7/RX/DT — GPIO RC7 / EUSART RX / CCP PWM |
| 腳位 2 | RD4 — GPIO RD4 |
| 腳位 3 | RD5 — GPIO RD5 |
| 腳位 4 | RD6 — GPIO RD6 / TX/CK |
| 腳位 5 | RD7 — GPIO RD7 / RX/DT |
| 腳位 6 | VSS — Ground reference |
| 腳位 7 | VSS — Ground reference |
| 腳位 8 | RB0 — GPIO RB0 / INT0 |
| 腳位 9 | RB1 — GPIO RB1 / INT1 |
| 腳位 10 | RB2 — GPIO RB2 |
| 腳位 11 | RB3 — GPIO RB3 |
| 腳位 12 | RB4 — GPIO RB4 |
| 腳位 13 | RB5 — GPIO RB5 |
| 腳位 14 | RB6 — GPIO RB6 / PGC (ICSP clock) |
| 腳位 15 | RB7 — GPIO RB7 / PGD (ICSP data) |
| 腳位 16 | VDD — Positive supply (1.8-3.6 V) |
| 腳位 17 | AVDD — Analog positive supply |
| 腳位 18 | AVSS — Analog ground |
| 腳位 19 | RA0 — GPIO RA0 / ANA0 |
| 腳位 20 | RA1 — GPIO RA1 / ANA1 |
| 腳位 21 | RA2 — GPIO RA2 / ANA2 / DAC |
| 腳位 22 | RA3 — GPIO RA3 / ANA3 / VREF+ |
| 腳位 23 | RA4 — GPIO RA4 / ANA4 |
| 腳位 24 | RA5 — GPIO RA5 / ANA5 |
| 腳位 25 | RA6 — GPIO RA6 / OSC2 |
| 腳位 26 | RA7 — GPIO RA7 / OSC1 |
| 腳位 27 | VSS — Ground reference |
| 腳位 28 | VDD — Positive supply (1.8-3.6 V) |
| 腳位 29 | RC0 — GPIO RC0 |
| 腳位 30 | RC1 — GPIO RC1 |
| 腳位 31 | RC2 — GPIO RC2 |
| 腳位 32 | RC3 — GPIO RC3 / SCL |
| 腳位 33 | RC4 — GPIO RC4 / SDA |
| 腳位 34 | RC5 — GPIO RC5 |
| 腳位 35 | RC6 — GPIO RC6 / TX/CK |
| 腳位 36 | VSS — Ground reference |
| 腳位 37 | RD0 — GPIO RD0 |
| 腳位 38 | RD1 — GPIO RD1 |
| 腳位 39 | RD2 — GPIO RD2 |
| 腳位 40 | RD3 — GPIO RD3 |
| 腳位 41 | VSS — Ground reference |
| 腳位 42 | RE0 — GPIO RE0 |
| 腳位 43 | RE1 — GPIO RE1 |
| 腳位 44 | RE3 — GPIO RE3 / MCLR |
典型應用
PIC18LF45K40-E/PT 適用於 6 應用s: Battery-Powered IoT Sensor Node, Consumer Appliance Control Board, Industrial HMI Touch Panel, LED Lighting and Signage Controller, Handheld Test and Measurement Instrument, Automotive Body Electronics (Non-Safety).
Battery-Powered IoT Sensor Node
The PIC18LF45K40-E/PT's 1.8-3.6 V VDD range, nanoamp-class sleep current (XLP) and 64 MHz HFINTOSC make it a strong fit for coin-cell or 2x AA IoT sensor nodes transmitting periodically over UART or SPI. The 10-bit ADC2 with computation offloads windowed threshold detection so the CPU stays in sleep until a sensor event occurs, extending battery life into multi-year territory. Place a 100 nF plus 1 µF decoupling pair within 5 mm of VDD/AVDD to keep ADC readings clean during TX bursts.
推薦
Consumer Appliance Control Board
The PIC18LF45K40-E/PT's 36 I/O pins, CWG peripheral, and 64 MHz CPU clock are well-matched to consumer appliance controllers such as coffee machines, washing machines, and induction cooktops. CWG synthesizes dead-band-controlled complementary PWM for IGBT or MOSFET half-bridge drivers without software overhead, while the 10-bit ADC2 reads multiple thermistor and current-sense channels. Pair the MCU with an opto-isolated triac driver on the mains side for safe line-voltage switching.
推薦
Industrial HMI Touch Panel
Industrial HMI panels with capacitive touch and small TFT displays benefit from the PIC18LF45K40-E/PT's PMP/EPSP parallel interface, 32 KB Flash for graphics libraries, and the 5-bit DAC for contrast bias generation. CWG drives a backlight boost converter directly from a complementary PWM pair, while the 10-bit ADC2 reads multiple touch-sense channels with hardware averaging. Pair with an external SPI NOR flash for bitmap storage and an I2C touch controller for the touch overlay.
推薦
LED Lighting and Signage Controller
Architectural LED lighting strips and DMX-512 controlled signage benefit from the PIC18LF45K40-E/PT's multiple CCP/ECCP PWM channels, CWG for high-frequency dimming, and 5-bit DAC for analog warm-white blending. The 64 MHz CPU clock supports smooth 16-bit PWM duty resolution at 1 kHz refresh, eliminating visible flicker in video applications. Pair with constant-current LED drivers such as the TLC59401 or WS2811 for per-pixel control.
推薦
Handheld Test and Measurement Instrument
Portable DMMs and process calibrators benefit from the PIC18LF45K40-E/PT's low-voltage operation down to 1.8 V (extending battery life), 10-bit ADC2 with averaging for accurate sensor reads, and 256 bytes of EEPROM for calibration constants. The 44-pin TQFP exposes enough GPIO for keypad scanning, rotary-encoder inputs, and LCD segment drive. Pair with a low-offset op-amp front end and a 4.5-digit LCD driver for sub-0.1% DC measurement accuracy.
推薦
Automotive Body Electronics (Non-Safety)
Non-safety body modules such as seat controllers, mirror adjusters, and ambient lighting benefit from the PIC18LF45K40-E/PT's extended -40C to +125C operating range and 36 I/O for motor and LED multiplexing. The CWG peripheral drives half-bridge drivers for small DC motors without external dead-band logic. For safety-critical automotive applications requiring AEC-Q100, an automotive-qualified variant should be selected instead.
推薦
推薦產品摘要
工程參考資料，適用於 PIC18LF45K40-E/PT — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC18F45K40-E/PT | PIC18LF45K40-I/PT | PIC18LF45K40-E/MV | PIC18LF45K22-I/PT | PIC18LF45J50-I/PT | PIC18LF4580-I/PT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP (10x10) | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same |
| Core | PIC18 (8-bit, 16 MIPS) | PIC18 (8-bit, 16 MIPS) | PIC18 (8-bit, 16 MIPS) | PIC18 (8-bit, 16 MIPS) | PIC18 (8-bit, 16 MIPS) | PIC18 (8-bit, 12 MIPS) | PIC18 (8-bit, 10 MIPS) |
| Program Memory (Flash) | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| RAM | 2 KB | 2 KB | 2 KB | 2 KB | 1.5 KB | 2 KB | 1.3 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 0 B | 256 B |
| Supply Voltage | 1.8-3.6 V | 2.3-5.5 V | 1.8-3.6 V | 1.8-3.6 V | 1.8-3.6 V | 2.0-3.6 V | 2.0-3.6 V |
| ADC | 10-bit ADC2 with computation | 10-bit ADC2 with computation | 10-bit ADC2 with computation | 10-bit ADC2 with computation | 10-bit ADC | 10-bit ADC | 11-bit ADC |
| Complementary Waveform Generator | Yes | Yes | Yes | Yes | No | No | No |
| Operating Temperature | -40C to +125C (E) | -40C to +125C (E) | -40C to +85C (I) | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
主要差異化特點
- Higher 16 MIPS throughput vs older PIC18F4580 (對比PIC18LF4580-I/PT)
- Core Independent CWG peripheral not on K22 family (對比PIC18LF45K22-I/PT)
- 256 bytes of EEPROM, unlike the J50 family (對比PIC18LF45J50-I/PT)
- Extended -40C to +125C operating range, broader than I-grade siblings (對比PIC18LF45K40-I/PT)
設計說明
Place a 100 nF plus 1 µF ceramic capacitor pair within 5 mm of each VDD/AVDD pin to suppress switching noise from the internal 64 MHz HFINTOSC. AVDD and AVSS should be tied to VDD/VSS at a single point near the MCU to avoid ground loops in ADC readings. For ADC accuracy better than 4 LSB at 10 bits, add a ferrite bead between digital VDD and analog AVDD. The Microchip datasheet (DS40001889) recommends the capacitors be X7R dielectric for stable performance over the -40C to +125C operating range.
Do not pull MCLR/RE3 low at power-up unless reset is required - the internal MCLR is enabled by the CONFIG4L register setting, and an external pull-up of 10 kΩ to VDD is mandatory when external reset is needed. Forgetting the ICSP connector's PGC/PGD pull-downs can cause the MCU to fail in-circuit programming. Also note that the LF suffix is required for 1.8-3.6 V operation; the F variant will not start below 2.3 V even though it shares the same die and pinout.
Route the 64 MHz HFINTOSC clock traces on the top layer with a continuous ground reference beneath, keeping them short and away from analog ADC traces. Place the ICSP header (PGC/PGD/MCLR/VDD/VSS) at the board edge to allow easy programming access. Decoupling capacitors must use short, wide traces - never use vias between the cap and the IC pin. Per Microchip's AN1106 layout guidelines, analog and digital ground planes should be split under the MCU and joined at a single point near the package.
合規資訊
RoHS compliant per distributor listings. Not AEC-Q100 qualified - not suitable for safety-critical automotive applications. Halogen-free status not confirmed in available data.