PIC18LF25K42-E/MV - 8-Bit 64MHz 32KB Flash XLP MCU | Microchip
MPN: PIC18LF25K42-E/MV ✓ Hoạt độngPIC18LF25K42-E/MV Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF25K42-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 PIC18LF25K42-E/MV (cùng hình factor và footprint) — khác nhau ở ADC, DAC, Package, Product Family, DMA Channels.
PIC18F25K42-E/MV
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF25K42-I/MV
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF25K42T-I/MV
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F24K42-E/MV
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF24K42-E/MV
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF25K42-E/MV Tỷ lệ tối đa & tính chất điện
| 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) |
| Hộp | 28-UQFN (4x4) with exposed thermal pad |
| Nhiệt độ hoạt động | -40 C to +125 C (E suffix, extended) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18LF25K42-E/MV
| Chân 1 | RA0 — Bidirectional I/O / analog input |
| Chân 2 | RA1 — Bidirectional I/O / analog input |
| Chân 3 | RA2 — Bidirectional I/O / analog input |
| Chân 4 | RA3 — Bidirectional I/O / analog input |
| Chân 5 | RA4 — Bidirectional I/O / analog input |
| Chân 6 | RA5 — Bidirectional I/O / analog input |
| Chân 7 | RA6 — Bidirectional I/O / analog input |
| Chân 8 | RA7 — Bidirectional I/O / analog input |
| Chân 9 | VSS — Ground reference |
| Chân 10 | RB0 — Bidirectional I/O / interrupt-on-change |
| Chân 11 | RB1 — Bidirectional I/O / interrupt-on-change |
| Chân 12 | RB2 — Bidirectional I/O / interrupt-on-change |
| Chân 13 | RB3 — Bidirectional I/O / interrupt-on-change |
| Chân 14 | RB4 — Bidirectional I/O / interrupt-on-change |
| Chân 15 | RB5 — Bidirectional I/O / interrupt-on-change |
| Chân 16 | RB6 — Bidirectional I/O / ICSPCLK |
| Chân 17 | RB7 — Bidirectional I/O / ICSPDAT |
| Chân 18 | VSS — Ground reference |
| Chân 19 | VDD — Positive supply voltage (1.8V-3.6V) |
| Chân 20 | RC0 — Bidirectional I/O |
| Chân 21 | RC1 — Bidirectional I/O |
| Chân 22 | RC2 — Bidirectional I/O |
| Chân 23 | RC3 — Bidirectional I/O |
| Chân 24 | RC4 — Bidirectional I/O |
| Chân 25 | RC5 — Bidirectional I/O |
| Chân 26 | RC6 — Bidirectional I/O / TX |
| Chân 27 | RC7 — Bidirectional I/O / RX |
| Chân 28 | EP — Exposed thermal pad - must be soldered to ground pour |
Ứng dụng tiêu biểu
PIC18LF25K42-E/MV phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF25K42-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 | 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) |
Bảo phân biệt quan trọng
- Lowest voltage LF variant in the K42 family (vsPIC18F25K42-E/MV)
- 32 KB Flash vs 16 KB on K42 sibling (vsPIC18LF24K42-E/MV)
- Highest operating temperature grade available (vsPIC18LF25K42-I/MV)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
