PIC18LF4525T-I/ML - 48KB Flash 8-bit MCU 44-QFN | Microchip
부품 번호: PIC18LF4525T-I/ML ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $8.16 | $8.16 |
| 10 | $7.51 | $75.10 |
| 100 | $6.78 | $678.00 |
| 500 | $6.05 | $3,025.00 |
| 1,000 | $5.49 | $5,490.00 |
PIC18LF4525T-I/ML 개요
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.
드롭인 대체품: PIC18LF4525T-I/ML — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: PIC18LF4525T-I/ML (동일 폼 팩터 및 풋프린트) — 차이점: Package, Timers, Communication, Core Architecture, Operating Temperature.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
PIC18LF4525-I/ML
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
PIC18LF4620-I/ML
✅ 드롭인✓ 재고 있음
$8.65 / 개
데이터시트 보기 →PIC18LF4523T-I/ML
✅ 드롭인✓ 재고 있음
$5.95 / 개
데이터시트 보기 →PIC18LF4520-I/ML
✅ 드롭인✓ 재고 있음
$4.92 / 개
데이터시트 보기 →PIC18LF4515-I/ML
✅ 드롭인✓ 재고 있음
$4.1 / 개
데이터시트 보기 →PIC18LF4525T-I/ML 최대 정격 & 전기적 특성
| Core Architecture | PIC18 (8-bit RISC, Harvard) |
| Program Memory | 48 KB Flash (24K x 16 words) |
| Data SRAM | 3968 bytes |
| Data EEPROM | 1024 bytes |
| 최대 클록 주파수 | 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) |
| 패키지 | 44-QFN (8x8 mm) with exposed pad |
| 동작 온도 범위 | -40C to +85C (Industrial) |
| 실장 유형 | Surface Mount |
| RoHS 상태 | Compliant |
| In-Circuit Debug | ICSP/ICD (MPLAB ICD 3, PICkit 5 compatible) |
PIC18LF4525T-I/ML 핀 구성
| 핀 1 | RA7/OSC1 — Port A bit 7 / crystal oscillator input |
| 핀 2 | RA6/OSC2 — Port A bit 6 / crystal oscillator output |
| 핀 3 | RA5/AN4/SS — Port A bit 5 / ADC ch4 / SPI slave select |
| 핀 4 | RA4/AN3 — Port A bit 4 / ADC ch3 |
| 핀 5 | RA3/AN2/VREF+ — Port A bit 3 / ADC ch2 / VREF+ |
| 핀 6 | RA2/AN1/VREF- — Port A bit 2 / ADC ch1 / VREF- |
| 핀 7 | RA1/AN1 — Port A bit 1 / ADC ch1 |
| 핀 8 | RA0/AN0 — Port A bit 0 / ADC ch0 |
| 핀 9 | VSS — Ground |
| 핀 10 | VDD — Supply voltage (2.0V to 5.5V) |
| 핀 11 | RB7/PGD — Port B bit 7 / ICSP data |
| 핀 12 | RB6/PGC — Port B bit 6 / ICSP clock |
| 핀 13 | RB5/PGM — Port B bit 5 / LVP programming |
| 핀 14 | RB4 — Port B bit 4 |
| 핀 15 | RB3/AN9 — Port B bit 3 / ADC ch9 |
| 핀 16 | RB2/AN8 — Port B bit 2 / ADC ch8 |
| 핀 17 | RB1/AN10 — Port B bit 1 / ADC ch10 |
| 핀 18 | RB0/AN12 — Port B bit 0 / ADC ch12 |
| 핀 19 | VSS — Ground |
| 핀 20 | VDD — Supply voltage |
| 핀 21 | RC7/RX/DT — Port C bit 7 / EUSART RX / Sync data |
| 핀 22 | RC6/TX/CK — Port C bit 6 / EUSART TX / Sync clock |
| 핀 23 | RC5/SDO — Port C bit 5 / SPI SDO |
| 핀 24 | RC4/SDI — Port C bit 4 / SPI SDI |
| 핀 25 | RC3/SCL — Port C bit 3 / I2C SCL |
| 핀 26 | RC2/SDA — Port C bit 2 / I2C SDA |
| 핀 27 | RC1/CCP2 — Port C bit 1 / CCP2 PWM |
| 핀 28 | RC0/CCP1 — Port C bit 0 / CCP1 PWM |
| 핀 29 | VSS — Ground |
| 핀 30 | VDD — Supply voltage |
| 핀 31 | RD7 — Port D bit 7 / PSP data |
| 핀 32 | RD6 — Port D bit 6 / PSP data |
| 핀 33 | RD5/AN7 — Port D bit 5 / ADC ch5 |
| 핀 34 | RD4/AN6 — Port D bit 4 / ADC ch6 |
| 핀 35 | RD3/AN5 — Port D bit 3 / ADC ch5 |
| 핀 36 | RD2/AN4 — Port D bit 2 / ADC ch4 |
| 핀 37 | RD1/AN3 — Port D bit 1 / ADC ch3 |
| 핀 38 | RD0/AN2 — Port D bit 0 / ADC ch2 |
| 핀 39 | VSS — Ground |
| 핀 40 | VDD — Supply voltage |
| 핀 41 | RE3/RD — Port E bit 3 / Parallel Slave Port read |
| 핀 42 | RE2/CS — Port E bit 2 / PSP chip select |
| 핀 43 | RE1/WR/AN6 — Port E bit 1 / PSP write / ADC ch6 |
| 핀 44 | RE0/RD/AN5 — Port E bit 0 / PSP read / ADC ch5 |
일반적인 애플리케이션
PIC18LF4525T-I/ML 적합 용도: 7 애플리케이션s: 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.
추천
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.
추천
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.
추천
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.
추천
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.
추천
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.
추천
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.
추천
추천 제품 요약
엔지니어링 참조 데이터: PIC18LF4525T-I/ML — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | 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 |
주요 차별점
- Highest Flash density in PIC18LF45xx 44-QFN family (vs PIC18LF4523T-I/ML)
- Larger RAM than mid-range siblings (vs PIC18LF4520-I/ML)
- Lower-voltage operation than F-variant (vs PIC18F4525-I/ML (F variant))
- Smaller package than TQFP-44 siblings (vs PIC18LF4525T-I/PT (44-TQFP))
설계 노트
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.
규정 준수 정보
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.
