PIC18LF4525T-I/ML - 48KB Flash 8-bit MCU 44-QFN | Microchip
MPN: PIC18LF4525T-I/ML ✓ Hoạt độngPIC18LF4525T-I/ML Tóm tắt
A PIC18F microcontroller is an 8-bit Harvard-architecture RISC MCU from Microchip's PIC family, used widely in embedded control. The PIC18 sits above the PIC16 family in complexity, adding a 16-bit instruction word, hardware multiplier, C-optimized architecture and priority-interrupt controller. It is the canonical choice for mid-range embedded designs that need more peripherals, memory and computational headroom than PIC16, but do not require a 16-bit or 32-bit core. The LF subfamily specifically targets low-voltage (2.0V-5.5V) operation with NanoWatt sleep modes for power-sensitive designs.
Key features include 48KB (24K x 16) Flash program memory, 3968 bytes SRAM, 1024 bytes EEPROM, a 10-bit ADC with up to 13 channels, two analog comparators, two CCP modules, an enhanced USART, MSSP (SPI/I2C), two 8/16-bit timer/counters and NanoWatt power-management modes. The 40 MHz oscillator yields up to 10 MIPS throughput, with a 16-bit instruction word and hardware 8x8 multiply. Integrated ICD (in-circuit debug) is supported via the standard ICSP/ICD interface.
Typical applications include industrial control nodes, sensor signal conditioning, automotive body electronics, low-power data loggers, USB/RS-232 bridging peripherals, and consumer white goods. The wide 2.0V-5.5V VDD range and NanoWatt sleep modes make it well-suited for battery-powered or energy-harvesting designs where quiescent current is critical.
When designing with this device, ensure the QFN exposed pad is soldered to a sufficient copper pour for thermal dissipation and ground reference. Use MPLAB X IDE with the XC8 compiler for development, and pick the MPLAB ICD 3 or PICkit 5 for in-circuit debug. Note that the PIC18F4525 (F-version, 4.2V-5.5V only) shares pinout but is NOT a drop-in replacement at lower VDD.
This page synthesizes distributor pricing, drop-in alternatives drawn from the same PIC18LF45xx family, and practical design notes that complement the manufacturer datasheet without duplicating it.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF4525T-I/ML — 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 PIC18LF4525T-I/ML (cùng hình factor và footprint) — khác nhau ở Package, Timers, Communication, Core Architecture, Operating Temperature.
PIC18LF4525-I/ML
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF4620-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF4523T-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF4520-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF4515-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF4525T-I/ML Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC18 (8-bit RISC, Harvard) |
| Program Memory | 48 KB Flash (24K x 16 words) |
| Data SRAM | 3968 bytes |
| Data EEPROM | 1024 bytes |
| Tần số xung maksimum | 40 MHz (Fosc = 40 MHz) |
| Instruction Throughput | 10 MIPS (4-clock instruction cycle) |
| Operating Voltage (VDD) | 2.0 V to 5.5 V |
| I/O Pins | 36 |
| ADC | 10-bit, up to 13 channels |
| Analog Comparators | 2 |
| CCP Modules | 2 (Capture/Compare/PWM) |
| Timers | 2 x 8-bit, 3 x 16-bit (Timer0/1/2/3 + TMR1/3) |
| Serial Interfaces | EUSART, MSSP (SPI / I2C) |
| Hộp | 44-QFN (8x8 mm) with exposed pad |
| Khoảng nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| In-Circuit Debug | ICSP/ICD (MPLAB ICD 3, PICkit 5 compatible) |
Cấu hình chân PIC18LF4525T-I/ML
| Chân 1 | RA7/OSC1 — Port A bit 7 / crystal oscillator input |
| Chân 2 | RA6/OSC2 — Port A bit 6 / crystal oscillator output |
| Chân 3 | RA5/AN4/SS — Port A bit 5 / ADC ch4 / SPI slave select |
| Chân 4 | RA4/AN3 — Port A bit 4 / ADC ch3 |
| Chân 5 | RA3/AN2/VREF+ — Port A bit 3 / ADC ch2 / VREF+ |
| Chân 6 | RA2/AN1/VREF- — Port A bit 2 / ADC ch1 / VREF- |
| Chân 7 | RA1/AN1 — Port A bit 1 / ADC ch1 |
| Chân 8 | RA0/AN0 — Port A bit 0 / ADC ch0 |
| Chân 9 | VSS — Ground |
| Chân 10 | VDD — Supply voltage (2.0V to 5.5V) |
| Chân 11 | RB7/PGD — Port B bit 7 / ICSP data |
| Chân 12 | RB6/PGC — Port B bit 6 / ICSP clock |
| Chân 13 | RB5/PGM — Port B bit 5 / LVP programming |
| Chân 14 | RB4 — Port B bit 4 |
| Chân 15 | RB3/AN9 — Port B bit 3 / ADC ch9 |
| Chân 16 | RB2/AN8 — Port B bit 2 / ADC ch8 |
| Chân 17 | RB1/AN10 — Port B bit 1 / ADC ch10 |
| Chân 18 | RB0/AN12 — Port B bit 0 / ADC ch12 |
| Chân 19 | VSS — Ground |
| Chân 20 | VDD — Supply voltage |
| Chân 21 | RC7/RX/DT — Port C bit 7 / EUSART RX / Sync data |
| Chân 22 | RC6/TX/CK — Port C bit 6 / EUSART TX / Sync clock |
| Chân 23 | RC5/SDO — Port C bit 5 / SPI SDO |
| Chân 24 | RC4/SDI — Port C bit 4 / SPI SDI |
| Chân 25 | RC3/SCL — Port C bit 3 / I2C SCL |
| Chân 26 | RC2/SDA — Port C bit 2 / I2C SDA |
| Chân 27 | RC1/CCP2 — Port C bit 1 / CCP2 PWM |
| Chân 28 | RC0/CCP1 — Port C bit 0 / CCP1 PWM |
| Chân 29 | VSS — Ground |
| Chân 30 | VDD — Supply voltage |
| Chân 31 | RD7 — Port D bit 7 / PSP data |
| Chân 32 | RD6 — Port D bit 6 / PSP data |
| Chân 33 | RD5/AN7 — Port D bit 5 / ADC ch5 |
| Chân 34 | RD4/AN6 — Port D bit 4 / ADC ch6 |
| Chân 35 | RD3/AN5 — Port D bit 3 / ADC ch5 |
| Chân 36 | RD2/AN4 — Port D bit 2 / ADC ch4 |
| Chân 37 | RD1/AN3 — Port D bit 1 / ADC ch3 |
| Chân 38 | RD0/AN2 — Port D bit 0 / ADC ch2 |
| Chân 39 | VSS — Ground |
| Chân 40 | VDD — Supply voltage |
| Chân 41 | RE3/RD — Port E bit 3 / Parallel Slave Port read |
| Chân 42 | RE2/CS — Port E bit 2 / PSP chip select |
| Chân 43 | RE1/WR/AN6 — Port E bit 1 / PSP write / ADC ch6 |
| Chân 44 | RE0/RD/AN5 — Port E bit 0 / PSP read / ADC ch5 |
Ứng dụng tiêu biểu
PIC18LF4525T-I/ML phù hợp cho 7 Áp dụngs: Industrial Control Nodes, Battery-Powered Sensor Loggers, Automotive Body Electronics, USB / RS-232 Bridging Peripherals, Consumer White Goods Control Boards, Medical Monitoring Devices (Non-Safety), HVAC Sensor Modules.
Industrial Control Nodes
The PIC18LF4525T-I/ML fits industrial control nodes because its 48KB Flash and 3968B RAM provide ample code space for PID loops, Modbus slave stacks and digital I/O handling, while the 2.0V-5.5V VDD range tolerates noisy 24V-sourced rails after regulation. The 10-bit ADC with 13 channels samples transducer signals directly, and the dual analog comparators enable window-detected overcurrent shutdown without software round-trip latency. With 10 MIPS throughput and two CCP modules, the part generates PWM outputs and measures feedback in real time. The 44-QFN exposed pad provides thermal dissipation at continuous loads, and the same PIC18 instruction set lets designs migrate to PIC18LF4620 (64KB) without code rewrite.
Được đề xuất
Battery-Powered Sensor Loggers
The PIC18LF4525T-I/ML fits battery-powered data loggers because its NanoWatt Technology supports sleep currents below 1 uA at 2.0V, and the 2.0V-5.5V VDD range lets designs run from two alkaline cells down to 2.0V end-of-life. The 1024B EEPROM stores calibration tables without external NV memory, and 48KB Flash accommodates cyclic-data buffering logic. The 13-channel 10-bit ADC scans thermistor, voltage and current sensors with a wake-on-threshold interrupt from analog comparators. EUSART and MSSP interfaces drive SD cards or low-power radios. Industrial -40C to +85C operation handles outdoor deployments. The 44-QFN package keeps board area under 64 sq mm.
Được đề xuất
Automotive Body Electronics
The PIC18LF4525T-I/ML suits automotive body electronics at 5V 12V bus rails because the LF series handles cranking transients down to 4.0V and survives load-dump spikes up to 5.5V. The 48KB Flash supports CAN-capable firmware via SPI-driven MCP2515 or software CAN, and the 10 MIPS throughput handles door-module and lighting control loops with deterministic timing. The 36 I/O drive LEDs, switches and relays directly through MOSFETs. The -40C to +85C industrial temperature range meets cabin and exterior zones. Note: AEC-Q100 qualified parts (PIC18F...-E automotive variants) are needed for engine-bay ECUs; the I-suffix is for industrial non-safety applications.
Được đề xuất
USB / RS-232 Bridging Peripherals
The PIC18LF4525T-I/ML fits bridging peripherals because the 48KB Flash accommodates USB class firmware (HID, CDC) on PIC18F4550-derived designs with software bit-banging, or it can drive the EUSART as a USB-to-UART bridge with 3968B RAM buffering. The MSSP module supports SPI/I2C peripherals simultaneously. 10 MIPS throughput sustains 12 Mbps full-speed USB signaling under firmware control. The 44-QFN package with exposed pad allows compact dongle layouts. Migration to PIC18F4550-I/ML in the same 44-QFN adds hardware USB for production volumes.
Được đề xuất
Consumer White Goods Control Boards
The PIC18LF4525T-I/ML fits white-goods control boards because the 36 I/O pins drive washing-machine pumps, valves, LED displays and keypads without external logic. The 48KB Flash holds full state-machine and diagnostic firmware for dishwashers, dryers and ovens. The two CCP modules generate PWM for variable-speed motor control. 10-bit ADC samples water level, temperature and current feedback with 13 channels. The 2.0V-5.5V VDD range accepts rectified mains with simple linear regulation. The 44-QFN's small footprint keeps controller board area under 10 sq cm.
Được đề xuất
Medical Monitoring Devices (Non-Safety)
The PIC18LF4525T-I/ML fits non-safety medical monitoring peripherals because the 13-channel 10-bit ADC captures thermistor and pressure-sensor data with adequate resolution for fitness wearables and home-monitoring devices. The 48KB Flash stores protocol stacks for BLE bridging and on-device data processing, while 3968B RAM buffers continuous sampling. The 2.0V-5.5V VDD range suits Li-ion single-cell (3.0V-4.2V) regulated rails. NanoWatt sleep modes extend battery life. Note: This part is NOT FDA-recognized for life-supporting or diagnostic devices - only for non-safety accessory roles.
Được đề xuất
HVAC Sensor Modules
The PIC18LF4525T-I/ML fits HVAC sensor modules because the wide 2.0V-5.5V VDD range accepts rectified 24VAC via simple regulation, and the -40C to +85C industrial range handles attic and outdoor unit environments. The 10-bit ADC with 13 channels reads temperature, humidity, CO2 (via analog front end) and pressure sensors directly. The 48KB Flash supports BACnet, Modbus and proprietary HVAC protocols. The 36 I/O lines drive relays and triac interfaces. NanoWatt sleep modes cut quiescent draw in standby. The 44-QFN with exposed pad provides thermal dissipation at continuous 5V operation.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF4525T-I/ML — 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 | PIC18LF4525-I/ML | PIC18LF4620-I/ML | PIC18LF4523T-I/ML | PIC18LF4520-I/ML | PIC18LF4515-I/ML |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-QFN (8x8 mm) with exposed pad | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same |
| Program Memory (Flash) | 48 KB | 48 KB | 64 KB (+33%) | 32 KB (-33%) | 32 KB (-33%) | 24 KB (-50%) |
| Data SRAM | 3968 bytes | 3968 bytes | 3984 bytes (~0%) | 1536 bytes (-61%) | 1536 bytes (-61%) | 1536 bytes (-61%) |
| Data EEPROM | 1024 bytes | 1024 bytes | 1024 bytes | 256 bytes | 0 bytes (no EEPROM) | 0 bytes (no EEPROM) |
| Operating Voltage (VDD) | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Maximum Clock | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| I/O Pins | 36 | 36 | 36 | 36 | 36 | 36 |
| ADC Resolution / Channels | 10-bit / 13 channels | 10-bit / 13 ch | 10-bit / 13 ch | 10-bit / 12 ch | 10-bit / 13 ch | 10-bit / 11 ch |
Bảo phân biệt quan trọng
- Highest Flash density in PIC18LF45xx 44-QFN family (vsPIC18LF4523T-I/ML)
- Larger RAM than mid-range siblings (vsPIC18LF4520-I/ML)
- Lower-voltage operation than F-variant (vsPIC18F4525-I/ML (F variant))
- Smaller package than TQFP-44 siblings (vsPIC18LF4525T-I/PT (44-TQFP))
Ghi chú thiết kế
The 44-QFN (8x8 mm) package dissipates heat through the exposed pad, which MUST be soldered to a ground copper pour of at least 1 sq inch (645 sq mm) for reliable operation above 25 deg C ambient. Without the exposed pad soldered, junction-to-ambient resistance theta_JA exceeds 60 C/W. At 40 MHz full-speed operation with all peripherals active, internal dissipation can reach 0.5W. Use thermal vias under the exposed pad (4-9 vias in a 3x3 grid) to conduct heat into inner ground planes.
Place a 0.1 uF decoupling capacitor within 5 mm of each VDD pin (4 VDD pins: 10, 20, 30, 40). Add a single bulk capacitor (1 uF to 10 uF tantalum or ceramic) at the package entry point. Keep the ICSP lines (RB6/PGC and RB7/PGD) trace-length matched and routed with the ground plane uninterrupted under them to avoid ICD coupling noise. The MCLR/VPP pin needs a 4.7 kohm pull-up to VDD; do not leave MCLR floating or floating-pin reset may occur during power-up.
Do NOT confuse the LF (2.0V-5.5V) and F (4.2V-5.5V) variants - the F variant PIC18F4525 will not function at 3.3V. Verify the datasheet's configuration bits - the PIC18LF4525T-I/ML uses CONFIG1L register 3000h for oscillator and CONFIG4L for code protection. The /ML suffix designates the QFN package; the same silicon ships in /SP (SPDIP), /P (PDIP), /PT (TQFP) and /SO (SOIC) for different footprints. Brown-out reset must be enabled (BOREN=1) for low-voltage LF designs to prevent code corruption at falling VDD.
For designs using MSSP as SPI master above 4 MHz, place 33 ohm series resistors at SDO/SCK to damp reflections. The analog inputs AN0-AN12 share pins with digital I/O; configure them as analog (ANSEL register) before ADC use, otherwise digital input stages will load the source. If using the ADC at high source impedance (>5 kohm), add an external buffer or use the internal fixed-voltage reference (FVR) for the bandgap. The VREF+ pin requires a 0.1 uF + 10 uF bypass network when used as ADC reference.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product declaration. Industrial -40C to +85C (I-suffix). Not AEC-Q100 qualified - for automotive choose PIC18F...-E variants. Halogen-free per Microchip product statement. Conflict-mineral compliant per Microchip corporate policy.
