PIC18LF45K40-E/PT - 8-Bit 64MHz 32KB Flash MCU | Microchip
MPN: PIC18LF45K40-E/PT ✓ نشطPIC18LF45K40-E/PT نظرة عامة
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.
بدائل مباشرة لـ PIC18LF45K40-E/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 PIC18LF45K40-E/PT (نفس عامل الشكل والبصمة) — يختلف في ADC, Package, Communication, Operating Temperature, Core.
PIC18F45K40-E/PT
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18LF45K40-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LF45K40-E/MV
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LF45K22-I/PT
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18LF45J50-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LF4580-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LF45K40-E/PT الحدود القصوى والخصائص الكهربائية
| 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 |
| العلبة | 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 |
| نوع التركيب | Surface Mount |
| مستوى MSL | 3 |
| حالة RoHS | Compliant |
تكوين أطراف PIC18LF45K40-E/PT
| دبوس 1 | RC7/RX/DT — GPIO RC7 / EUSART RX / CCP PWM |
| دبوس 2 | RD4 — GPIO RD4 |
| دبوس 3 | RD5 — GPIO RD5 |
| دبوس 4 | RD6 — GPIO RD6 / TX/CK |
| دبوس 5 | RD7 — GPIO RD7 / RX/DT |
| دبوس 6 | VSS — Ground reference |
| دبوس 7 | VSS — Ground reference |
| دبوس 8 | RB0 — GPIO RB0 / INT0 |
| دبوس 9 | RB1 — GPIO RB1 / INT1 |
| دبوس 10 | RB2 — GPIO RB2 |
| دبوس 11 | RB3 — GPIO RB3 |
| دبوس 12 | RB4 — GPIO RB4 |
| دبوس 13 | RB5 — GPIO RB5 |
| دبوس 14 | RB6 — GPIO RB6 / PGC (ICSP clock) |
| دبوس 15 | RB7 — GPIO RB7 / PGD (ICSP data) |
| دبوس 16 | VDD — Positive supply (1.8-3.6 V) |
| دبوس 17 | AVDD — Analog positive supply |
| دبوس 18 | AVSS — Analog ground |
| دبوس 19 | RA0 — GPIO RA0 / ANA0 |
| دبوس 20 | RA1 — GPIO RA1 / ANA1 |
| دبوس 21 | RA2 — GPIO RA2 / ANA2 / DAC |
| دبوس 22 | RA3 — GPIO RA3 / ANA3 / VREF+ |
| دبوس 23 | RA4 — GPIO RA4 / ANA4 |
| دبوس 24 | RA5 — GPIO RA5 / ANA5 |
| دبوس 25 | RA6 — GPIO RA6 / OSC2 |
| دبوس 26 | RA7 — GPIO RA7 / OSC1 |
| دبوس 27 | VSS — Ground reference |
| دبوس 28 | VDD — Positive supply (1.8-3.6 V) |
| دبوس 29 | RC0 — GPIO RC0 |
| دبوس 30 | RC1 — GPIO RC1 |
| دبوس 31 | RC2 — GPIO RC2 |
| دبوس 32 | RC3 — GPIO RC3 / SCL |
| دبوس 33 | RC4 — GPIO RC4 / SDA |
| دبوس 34 | RC5 — GPIO RC5 |
| دبوس 35 | RC6 — GPIO RC6 / TX/CK |
| دبوس 36 | VSS — Ground reference |
| دبوس 37 | RD0 — GPIO RD0 |
| دبوس 38 | RD1 — GPIO RD1 |
| دبوس 39 | RD2 — GPIO RD2 |
| دبوس 40 | RD3 — GPIO RD3 |
| دبوس 41 | VSS — Ground reference |
| دبوس 42 | RE0 — GPIO RE0 |
| دبوس 43 | RE1 — GPIO RE1 |
| دبوس 44 | RE3 — GPIO RE3 / MCLR |
التطبيقات النموذجية
PIC18LF45K40-E/PT مناسب لـ 6 التطبيقs: 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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC18LF45K40-E/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | 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) |
أبرز الفروقات
- Higher 16 MIPS throughput vs older PIC18F4580 (مقابلPIC18LF4580-I/PT)
- Core Independent CWG peripheral not on K22 family (مقابلPIC18LF45K22-I/PT)
- 256 bytes of EEPROM, unlike the J50 family (مقابلPIC18LF45J50-I/PT)
- Extended -40C to +125C operating range, broader than I-grade siblings (مقابلPIC18LF45K40-I/PT)
ملاحظات التصميم
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.
معلومات الامتثال
RoHS compliant per distributor listings. Not AEC-Q100 qualified - not suitable for safety-critical automotive applications. Halogen-free status not confirmed in available data.