PIC18LF45K40-I/MV - 8-bit 64MHz 32KB Flash MCU | Microchip
Référence : PIC18LF45K40-I/MV ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $2.78 | $2,78 |
| 10 | $2.5 | $25,00 |
| 100 | $2.22 | $222,00 |
| 500 | $1.95 | $975,00 |
| 1 000 | $1.7 | $1 700,00 |
PIC18LF45K40-I/MV Présentation
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, integrating CPU core, non-volatile program memory (Flash), volatile working memory (SRAM), small EEPROM for data retention, and a rich set of on-chip peripherals. In the broader semiconductor taxonomy, an MCU belongs to microcontrollers -> microcomputers -> embedded processors -> logic/semiconductor ICs. The K40 family is positioned within Microchip's PIC18 line as a general-purpose, low-power tier with Core Independent Peripherals (CIPs) that offload tasks from the CPU.
The PIC18LF45K40-I/MV integrates a 10-bit ADC with computation (ADC2), a 5-bit DAC, two comparators, a 16-bit PWM with CCP, Complementary Waveform Generator (CWG), Zero-Cross Detect (ZCD), Hardware Limit Timer (HLT), Windowed Watchdog Timer (WWDT), and CRC/SCAN memory diagnostics. Communication is handled through EUSART (UART), SPI and I2C, with Peripheral Pin Select (PPS) for flexible signal routing across the 36 I/O pins. NanoWatt XLP technology enables sleep currents below typical MCU levels, making the part suited for battery-powered and energy-harvesting designs.
Architecturally, the PIC18F/K40 uses an enhanced Harvard RISC core with a hardware multiplier and C-optimized instruction set. The combination of CIPs (CWG, NCO, DSM, ZCD) plus PPS enables designers to implement complex timing, motor-control and signal-generation tasks without CPU intervention, freeing the core for application logic and communications.
Typical applications include low-power IoT sensor nodes, battery-powered handheld instrumentation, home-appliance control panels, LED lighting drivers, motor-control auxiliary logic, and USB-to-UART bridge firmware hosts. The wide voltage range and 5V-tolerant I/O (with proper configuration) also suit industrial 24V-bus interface modules after external regulation.
When designing with the MV package, route the central exposed pad to the ground plane for thermal and electrical performance, and provide a 0.1 uF decoupling capacitor as close as possible to each VDD/VSS pair. Avoid using PPS as a substitute for proper pin assignment during PCB layout—keep high-speed signals on dedicated pins.
This page synthesizes distributor pricing, drop-in package alternatives from the same PIC18 family, and practical design notes not found in the manufacturer datasheet.
Alternatives de remplacement direct pour PIC18LF45K40-I/MV — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PIC18LF45K40-I/MV (même facteur de forme et même empreinte) — différant par ADC, Comparators, Operating Temperature, Package, Communication.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC18LF45K40-E/MV
✅ Remplacement direct✓ En stock
$1.55 / unité
Voir la fiche technique →PIC18LF45K40-I/MV Valeurs maximales et caractéristiques électriques
| Core Architecture | PIC18 8-bit RISC |
| Program Memory (Flash) | 32 KB (16K x 16) |
| SRAM | 2 KB |
| EEPROM | 256 B |
| Maximum CPU Speed | 64 MHz (16 MIPS) |
| Operating Voltage (LF) | 1.8 V to 3.6 V |
| I/O Pins | 36 |
| Boîtier | 40-UQFN (MV) 5x5 mm |
| ADC | 10-bit ADC2 with Computation |
| DAC | 5-bit DAC |
| Comparators | 2 |
| PWM | 16-bit PWM with CCP |
| CIPs | CWG, ZCD, HLT, WWDT, CRC/SCAN, NCO, DSM |
| Communication | EUSART, SPI, I2C with PPS |
| Température de fonctionnement | -40C to +85C (Industrial) |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant |
Configuration des broches de PIC18LF45K40-I/MV
| Broche 1 | RA0/AN0 — PORTA bit 0 / Analog input 0 / PPS input |
| Broche 2 | RA1/AN1 — PORTA bit 1 / Analog input 1 / PPS input |
| Broche 3 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| Broche 4 | RA3/AN3 — PORTA bit 3 / Analog input 3 / VREF+ |
| Broche 5 | RA4/AN4 — PORTA bit 4 / Analog input 4 |
| Broche 6 | RA5/AN5 — PORTA bit 5 / Analog input 5 |
| Broche 7 | RA6/OSC2 — PORTA bit 6 / Oscillator output |
| Broche 8 | RA7/OSC1 — PORTA bit 7 / Oscillator input |
| Broche 9 | RE3/MCLR — PORTE bit 3 / Master Clear (reset) |
| Broche 10 | RB0/INT0 — PORTB bit 0 / External interrupt 0 |
| Broche 11 | VDD — Positive supply (1.8-3.6 V for LF) |
| Broche 12 | VSS — Ground reference |
| Broche 13 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| Broche 14 | RB2/INT2 — PORTB bit 2 / External interrupt 2 |
| Broche 15 | RB3/INT3 — PORTB bit 3 / External interrupt 3 / IOC |
| Broche 16 | RB4/IOC — PORTB bit 4 / Interrupt-on-change |
| Broche 17 | RB5/IOC — PORTB bit 5 / Interrupt-on-change |
| Broche 18 | RB6/PGC — PORTB bit 6 / ICSP clock / IOC |
| Broche 19 | RB7/PGD — PORTB bit 7 / ICSP data / IOC |
| Broche 20 | VSS — Ground reference |
| Broche 21 | RC0/SOSCO — PORTC bit 0 / Secondary oscillator output |
| Broche 22 | RC1/SOSCI — PORTC bit 1 / Secondary oscillator input |
| Broche 23 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| Broche 24 | RC3/CCP2 — PORTC bit 3 / CCP2 PWM output |
| Broche 25 | RC4 — PORTC bit 4 / PPS I/O |
| Broche 26 | RC5 — PORTC bit 5 / PPS I/O |
| Broche 27 | RC6/TX/CK — PORTC bit 6 / EUSART TX / clock |
| Broche 28 | RC7/RX/DT — PORTC bit 7 / EUSART RX / data |
| Broche 29 | RD0 — PORTD bit 0 / PPS I/O |
| Broche 30 | RD1 — PORTD bit 1 / PPS I/O |
| Broche 31 | VSS — Ground reference |
| Broche 32 | VDD — Positive supply (1.8-3.6 V for LF) |
| Broche 33 | RD2 — PORTD bit 2 / PPS I/O |
| Broche 34 | RD3 — PORTD bit 3 / PPS I/O |
| Broche 35 | RD4 — PORTD bit 4 / PPS I/O |
| Broche 36 | RD5 — PORTD bit 5 / PPS I/O |
| Broche 37 | RD6 — PORTD bit 6 / PPS I/O |
| Broche 38 | RD7 — PORTD bit 7 / PPS I/O |
| Broche 39 | RE0 — PORTE bit 0 / PPS I/O |
| Broche 40 | RE1 — PORTE bit 1 / PPS I/O |
| Broche EP | EP — Exposed thermal pad - connect to ground |
Applications typiques
PIC18LF45K40-I/MV convient pour 6 applications: Battery-Powered IoT Sensor Node, Home Appliance User Interface, LED Lighting Driver Controller, Motor-Control Auxiliary Logic, Industrial Sensor / 4-20 mA Transmitter, USB-to-UART / SPI Bridge Firmware Host.
Battery-Powered IoT Sensor Node
The PIC18LF45K40-I/MV fits battery-powered IoT sensor nodes because its 1.8-3.6 V LF supply matches single-cell Li-ion / 2x AA chemistries and XLP sleep current is below 1 uA with RTCC + WWDT active, extending coin-cell life into multi-year territory. The 10-bit ADC2 with Computation auto-accumulates sensor readings without CPU wake, while the CWG drives a low-power piezo sounder or LED indicator on threshold events. Pair with an EUSART/SPI link to an external sub-GHz or BLE radio. Compared to a 32-bit Cortex-M0+, the LF45K40 draws less quiescent current and costs less, at the price of lower MIPS throughput.
Recommandé
Home Appliance User Interface
In washing machines, induction cooktops and microwave ovens, the PIC18LF45K40-I/MV's 36 I/O pins drive 7-segment or TFT keypads, scan capacitive touch via the CTMU peripheral and run a 16-bit PWM for buzzer/relay control. NanoWatt XLP keeps standby power below energy-star limits, while 256 B EEPROM stores user preferences and fault history across power cycles. The CWG (Complementary Waveform Generator) and ZCD (Zero-Cross Detect) are particularly useful for AC-line TRIAC dimming and synchronous motor timing without external logic.
Recommandé
LED Lighting Driver Controller
The PIC18LF45K40-I/MV's 16-bit PWM with CCP plus the CWG deliver flicker-free dimming down to 0.1% duty-cycle resolution, while the 5-bit DAC provides logarithmic dimming curves that match human eye perception. ZCD enables AC-mains synchronous TRIAC dimmer decoding without optocouplers, reducing BOM cost. With 2 KB SRAM, the part runs reference CCT/tunable-white algorithms for smart-bulb applications. The 32 KB Flash holds DALI, 0-10 V or Casambi-style protocol stacks and still leaves room for in-field OTA firmware updates.
Recommandé
Motor-Control Auxiliary Logic
Use the PIC18LF45K40-I/MV as an auxiliary MCU alongside a dedicated motor-control IC for BLDC and stepper systems: the 16-bit PWM with CCP generates complementary drive signals, CWG adds programmable dead-band, and ZCD synchronizes commutation to back-EMF. The 5-bit DAC outputs a 0-5 V speed reference while the 10-bit ADC2 reads phase currents and position sensors with hardware averaging. The K40's 64 MHz / 16 MIPS throughput handles sensorless back-EMF zero-cross algorithms that would starve a PIC16 of bandwidth.
Recommandé
Industrial Sensor / 4-20 mA Transmitter
The PIC18LF45K40-I/MV is a strong fit for 4-20 mA loop-powered transmitters: the 10-bit ADC2 with Computation provides oversampling and digital filtering directly in hardware, while the 5-bit DAC generates the 4-20 mA span reference. Operating from 1.8-3.6 V keeps the part within loop compliance budgets, and CRC/SCAN memory diagnostics catch Flash corruption in field-deployed units. The -40C to +85C industrial temperature rating covers process-control cabinets and outdoor installations when paired with the PIC18LF45K40-E/MV extended-temperature part.
Recommandé
USB-to-UART / SPI Bridge Firmware Host
While the LF45K40 itself lacks USB, it serves as the firmware host for USB-to-UART or USB-to-SPI bridges using an external FTDI or MCP2200 chip. PPS routes UART TX/RX to any spare I/O, allowing flexible PCB layout, and 32 KB Flash comfortably holds class-command parsing, bootloader logic and customer configuration storage. Compared to using a dedicated USB MCU, this architecture cuts BOM cost when USB is only needed for firmware update or factory test, not in production.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC18LF45K40-I/MV — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC18LF45K40-I/ML | PIC18LF45K40-E/MV | PIC18LF45K40-E/PT |
|---|---|---|---|---|
| Package | 40-UQFN (MV) 5x5 mm | 44-QFN (ML) | 40-UQFN (MV) 5x5 mm - same | 44-TQFP (PT) 10x10 mm |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B |
| Max CPU Speed | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) |
| Operating Voltage | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) |
| Temperature Range | -40C to +85C (Industrial) | -40C to +85C | -40C to +125C (Extended) | -40C to +125C (Extended) |
Principaux différenciateurs
- Same 40-UQFN MV footprint across temperature grades (vs PIC18LF45K40-E/MV)
- Extended CIP peripheral set at LF45K40 price tier (vs PIC18F26K40-I/MV)
- Compact UQFN footprint reduces PCB area (vs PIC18LF45K40-I/PT)
Notes de conception
Estimated: route the central exposed pad (EP) of the UQFN-40 MV package to a continuous ground pour with at least 4 thermal vias (0.3 mm drill, 0.5 mm pad) to the inner ground plane. This provides both electrical ground reference and a low-resistance thermal path. Per Microchip UQFN mounting guidelines, the EP must be soldered to achieve the rated thermal performance - a dry-soldered EP can raise junction temperature by 15-20 C at full CPU load, risking thermal shutdown at 64 MHz operation.
Place a 100 nF ceramic decoupling capacitor (X7R, 0402 or 0603) within 3 mm of each VDD/VSS pin pair (pins 11/12 and 31/32). Add a bulk 1 uF to 4.7 uF ceramic near the MCU supply input for switch-mode-converter ripple rejection. The LF variant operates from 1.8 V minimum; ensure the chosen LDO or DC-DC output stays above 1.8 V even under full 64 MHz core load and ADC2 sampling transients, which can pull 8-10 mA peak.
Keep the ICP/MCLR reset circuit (typically 10 kohm pull-up to VDD with a 100 nF cap to ground) within 5 mm of pin 9 (RE3/MCLR) to avoid spurious resets. The ICSP clock (PGC, RB6) and data (PGD, RB7) lines should be routed with ground on both sides and matched length if used for high-speed programming. For PPS flexibility, reserve at least 4 spare PORTB/PORTC pins for SPI or UART remapping so the same PCB can support multiple firmware variants.
Do not exceed 3.6 V on any I/O pin of the LF variant - this includes the analog-capable pins during ADC2 conversions. If the design connects to a 5 V sensor bus, add a level translator (such as a resistor divider or dedicated translator IC). When migrating firmware between PIC18LF45K40-I/MV and PIC18F45K40, double-check the CONFIG words: the LF device disables 5 V operation by default and a copy-pasted CONFIG from an F-image can lock the LF part at 3.6 V max.
Informations de conformité
RoHS compliant per Microchip product page. The LF45K40 is not AEC-Q100 qualified; for automotive applications use the PIC18F45K40 with AEC-Q100 grade or higher-tier PIC18 K-series.
