PIC18LF25K42-E/MV - 8-Bit 64MHz 32KB Flash XLP MCU | Microchip
Référence : PIC18LF25K42-E/MV ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $2.78 | $2,78 |
| 10 | $2.46 | $24,60 |
| 100 | $2.05 | $205,00 |
| 500 | $1.74 | $870,00 |
| 1 000 | $1.49 | $1 490,00 |
PIC18LF25K42-E/MV Présentation
An 8-bit microcontroller is a single-chip computer built around an 8-bit data bus, a CPU, on-chip memory, and programmable peripherals. PIC18 family devices use an enhanced Harvard RISC architecture that delivers near 1 MIPS per MHz while maintaining the PIC legacy of deterministic interrupts. The K42 sub-family specifically adds high-resolution analog (12-bit ADC with computation, 5-bit DAC), Core Independent Peripherals (CIPs) such as CWG/NCO/CLC, and on-chip DMA - features that historically required an external companion IC.
Key features of this part include 25 programmable I/O pins, 2 KB of SRAM, 256 B of EEPROM, 10 timers, 2 DMA channels, 2 serial communication interfaces (UART/SPI/I2C selectable), and on-chip PWM/CRC/SRT modules. The XLP architecture delivers nanoWatt sleep currents in deep sleep with retention, enabling multi-year coin-cell operation in metering or remote sensor use cases. The 28-UQFN (4x4) package is one of the smallest footprints in the K42 family, fitting tightly constrained PCB layouts.
Typical applications include battery-powered IoT sensor nodes, low-power wireless controllers (sensor front-ends paired with a radio), industrial HMI keypads, low-end appliance control boards, portable medical monitoring devices, and energy harvesting edge nodes. The integrated 12-bit ADC and 5-bit DAC, plus PWM and DMA, allow direct connection to analog sensors and actuators without an external analog front-end.
When designing with this device, verify that the I/O count (25) matches your board requirement and reserve the UQFN thermal pad as a ground pour to dissipate switching transients. Pair the MCU with a 1.8-3.6V LDO such as the MCP1700 if your system uses a higher-voltage rail. This page synthesizes distributor pricing, drop-in alternative cross-references, and practical design notes not consolidated in the manufacturer datasheet.
Alternatives de remplacement direct pour PIC18LF25K42-E/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 PIC18LF25K42-E/MV (même facteur de forme et même empreinte) — différant par ADC, DAC, Package, Product Family, DMA Channels.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC18F25K42-E/MV
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC18LF25K42-I/MV
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC18LF25K42T-I/MV
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC18F24K42-E/MV
✅ Remplacement direct✓ En stock
$1.75 / unité
Voir la fiche technique →PIC18LF24K42-E/MV
✅ Remplacement direct✓ En stock
$1.52 / unité
Voir la fiche technique →PIC18LF25K42-E/MV Valeurs maximales et caractéristiques électriques
| Product Family | PIC18 K42 (PIC18LF25K42) |
| Core | PIC18 8-bit RISC |
| Maximum CPU Frequency | 64 MHz |
| Program Memory (Flash) | 32 KB (16K x 16) |
| Data SRAM | 2 KB |
| Data EEPROM | 256 B |
| Operating Voltage Range | 1.8 V to 3.6 V (LF) |
| I/O Pins | 25 |
| ADC | 12-bit, multiple channels |
| DAC | 5-bit, 1 channel |
| Timers | 10 |
| DMA Channels | 2 |
| Serial Interfaces | 2 (UART / SPI / I2C configurable) |
| Boîtier | 28-UQFN (4x4) with exposed thermal pad |
| Température de fonctionnement | -40 C to +125 C (E suffix, extended) |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant |
Configuration des broches de PIC18LF25K42-E/MV
| Broche 1 | RA0 — Bidirectional I/O / analog input |
| Broche 2 | RA1 — Bidirectional I/O / analog input |
| Broche 3 | RA2 — Bidirectional I/O / analog input |
| Broche 4 | RA3 — Bidirectional I/O / analog input |
| Broche 5 | RA4 — Bidirectional I/O / analog input |
| Broche 6 | RA5 — Bidirectional I/O / analog input |
| Broche 7 | RA6 — Bidirectional I/O / analog input |
| Broche 8 | RA7 — Bidirectional I/O / analog input |
| Broche 9 | VSS — Ground reference |
| Broche 10 | RB0 — Bidirectional I/O / interrupt-on-change |
| Broche 11 | RB1 — Bidirectional I/O / interrupt-on-change |
| Broche 12 | RB2 — Bidirectional I/O / interrupt-on-change |
| Broche 13 | RB3 — Bidirectional I/O / interrupt-on-change |
| Broche 14 | RB4 — Bidirectional I/O / interrupt-on-change |
| Broche 15 | RB5 — Bidirectional I/O / interrupt-on-change |
| Broche 16 | RB6 — Bidirectional I/O / ICSPCLK |
| Broche 17 | RB7 — Bidirectional I/O / ICSPDAT |
| Broche 18 | VSS — Ground reference |
| Broche 19 | VDD — Positive supply voltage (1.8V-3.6V) |
| Broche 20 | RC0 — Bidirectional I/O |
| Broche 21 | RC1 — Bidirectional I/O |
| Broche 22 | RC2 — Bidirectional I/O |
| Broche 23 | RC3 — Bidirectional I/O |
| Broche 24 | RC4 — Bidirectional I/O |
| Broche 25 | RC5 — Bidirectional I/O |
| Broche 26 | RC6 — Bidirectional I/O / TX |
| Broche 27 | RC7 — Bidirectional I/O / RX |
| Broche 28 | EP — Exposed thermal pad - must be soldered to ground pour |
Applications typiques
PIC18LF25K42-E/MV convient pour 6 applications: Battery-Powered IoT Sensor Node, Industrial HMI Keypad Controller, Low-End Appliance Control Board, Portable Medical Monitoring Device, Energy-Harvesting Edge Node, USB-C DC Fan Speed Controller.
Battery-Powered IoT Sensor Node
The PIC18LF25K42-E/MV is well matched to battery-powered IoT sensor nodes because its XLP nanoWatt sleep modes with retention and 1.8-3.6 V LF supply let the system run for years from a coin cell or two-AA pack. The 32 KB Flash accommodates BLE/Sigfox/LoRa HCI command stacks, while the 12-bit ADC with computation and 5-bit DAC interface directly to analog sensor elements. The 25 GPIO pins drive status LEDs, user buttons, and SPI/I2C links to an external radio or sensor front-end. Pinouts are compact in UQFN-28 (4x4), enabling single-sided sensor beacons under 15 mm square.
Recommandé
Industrial HMI Keypad Controller
For industrial HMI keypads, the PIC18LF25K42-E/MV delivers 25 GPIO to scan a 4x5 matrix plus indicator LEDs and a buzzer, while the 64 MHz core debounces inputs and runs Modbus RTU on UART without CPU stall thanks to DMA. The 12-bit ADC reads analog trimmers, and the on-chip CWG/CLC/PWM peripherals drive backlight LED strings without external timing chips. The -E temperature grade (-40C to +125C) supports factory-floor enclosures. With 32 KB Flash, the part also stores localized string tables and boot-loader images for field updates.
Recommandé
Low-End Appliance Control Board
The PIC18LF25K42-E/MV is ideal for low-end appliance control boards (coffee machines, blenders, small kitchen appliances) because it integrates 10 timers, PWM, and a 5-bit DAC for motor/solenoid drive without an external analog controller. The 32 KB Flash holds state-machine firmware plus a small UI library, while the 256 B EEPROM stores user preferences across power cycles. The 1.8-3.6 V LF supply pairs directly with rectified mains-derived 3.3 V rails. The UQFN-28 (4x4) package fits compact PCBAs typical of consumer appliances.
Recommandé
Portable Medical Monitoring Device
For portable medical monitors (pulse-oximeters, wearable thermometers, sleep trackers), the PIC18LF25K42-E/MV provides the low-noise 12-bit ADC required to read photodiode or thermistor sensors, the XLP sleep currents to extend battery life between charges, and the 5-bit DAC to bias sensor front-ends. The 64 MHz MIPS budget handles simple DSP filtering inline without an external DSP chip. The 28-UQFN (4x4) footprint enables sub-20 mm wearable form factors. The -E temperature grade suits body-worn devices that may experience thermal cycling.
Recommandé
Energy-Harvesting Edge Node
The PIC18LF25K42-E/MV is well suited to energy-harvesting edge nodes (solar/battery/thermal) because its nanoWatt deep-sleep currents and 1.8 V minimum supply allow operation from weakly harvested sources with super-capacitor buffering. The on-chip DMA, CLC, and NCO peripherals perform energy/power metering calculations without waking the CPU, while the 32 KB Flash holds TinyML inference or fixed-function algorithms. The 12-bit ADC reads harvest voltage/current sense resistors directly. UQFN-28 (4x4) packaging supports miniature self-powered sensor tiles.
Recommandé
USB-C DC Fan Speed Controller
For USB-C powered DC fan controllers used in PC cooling and small appliances, the PIC18LF25K42-E/MV delivers the PWM channels, 5-bit DAC, and ADC to read tach feedback and adjust fan curves. The 32 KB Flash stores multiple fan profiles and the 256 B EEPROM retains user preferences. The 64 MHz core handles smooth RPM ramp control via DMA-assisted PWM updates. The 1.8-3.6 V LF supply is compatible with USB-CC 5V rails through a small LDO. UQFN-28 (4x4) keeps the controller footprint under 16 mm square.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC18LF25K42-E/MV — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC18F25K42-E/MV | PIC18LF25K42-I/MV | PIC18LF25K42T-I/MV | PIC18F24K42-E/MV | PIC18LF24K42-E/MV |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-UQFN (4x4) | 28-UQFN (4x4) - same | 28-UQFN (4x4) - same | 28-UQFN (4x4) - same | 28-UQFN (4x4) - same | 28-UQFN (4x4) - same |
| Program Memory (Flash) | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB | 16 KB |
| Data SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 1 KB | 1 KB |
| Operating Voltage | 1.8 V to 3.6 V (LF) | 2.3 V to 5.5 V (F) | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) | 2.3 V to 5.5 V (F) | 1.8 V to 3.6 V (LF) |
| Maximum CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Temperature Grade | -40 C to +125 C (E) | -40 C to +125 C (E) | -40 C to +85 C (I) | -40 C to +85 C (I) | -40 C to +125 C (E) | -40 C to +125 C (E) |
| I/O Pins | 25 | 25 | 25 | 25 | 25 | 25 |
| XLP Sleep Support | Yes (nanoWatt) | Yes (nanoWatt) | Yes (nanoWatt) | Yes (nanoWatt) | Yes (nanoWatt) | Yes (nanoWatt) |
| Approximate Unit Price (1 qty) | $2.78 | $2.78 (similar) | $2.78 (similar) | $2.78 (similar) | $2.60 (slightly lower) | $2.60 (slightly lower) |
Principaux différenciateurs
- Lowest voltage LF variant in the K42 family (vs PIC18F25K42-E/MV)
- 32 KB Flash vs 16 KB on K42 sibling (vs PIC18LF24K42-E/MV)
- Highest operating temperature grade available (vs PIC18LF25K42-I/MV)
Notes de conception
The PIC18LF25K42-E/MV's LF supply range is 1.8 V to 3.6 V. Decouple VDD with a 100 nF ceramic cap placed within 3 mm of the VDD pin, plus a bulk 4.7 uF to 10 uF tantalum or ceramic on the same rail to handle DMA-driven load transients. The exposed thermal pad (EP) must be soldered to a contiguous ground pour on the top layer to meet thermal and EMI performance - leaving it floating is a common prototype mistake.
Keep the ICSP pins (RB6/RB7) accessible for in-circuit programming and debugging by routing them to a 2x3 0.1 inch header or test pads. Place the ICSP header on the board edge with no series resistors or buffers between the MCU and the programmer. For UQFN-28 (4x4), provide at least 4 ground vias under the EP pad to sink switching return currents and avoid ground bounce during DMA bursts.
Do not exceed 3.6 V on VDD on the LF variant - permanent damage will occur. When migrating from PIC18F to PIC18LF K42 parts, re-validate any peripheral that depends on VDD (e.g., ADC absolute accuracy, Brown-out Reset thresholds) because the F variant's higher voltage range shifts the BOR and ADC reference behavior. Always select the matching CONFIG register BOR setting via MPLAB X IDE before programming the device.
Informations de conformité
RoHS and REACH compliance per Microchip product page. AEC-Q100 not qualified - this is an industrial/consumer MCU. For AEC-Q100 automotive qualified K42 family members, look at designated -VAO suffix variants.
