PIC18LF6525T-I/PT - 8-Bit 40MHz MCU, 48KB Flash, TQFP-64 | Microchip
MPN: PIC18LF6525T-I/PT ✓ Hoạt độngPIC18LF6525T-I/PT Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (Flash/ROM), data memory (RAM), non-volatile storage (EEPROM), and a rich set of peripherals on one die. Within Microchip's taxonomy, the PIC18F family sits above the baseline PIC10/12/16 families in terms of performance and peripheral count - 8-bit MCU -> microcontroller -> embedded controller -> semiconductor. PIC18F parts add hardware multiply, larger linear addressing, and C-friendly architecture optimized for mixed C/assembly firmware development.
Key features of the PIC18LF6525 include 54 digital I/O lines, up to twelve 10-bit ADC channels, two analog comparators, two USART modules, one MSSP (I2C/SPI) peripheral, two Capture/Compare/PWM (CCP) modules plus one Enhanced CCP (ECCP), a 16-bit timer with three 8-bit timers, an RTCC, and a parallel slave port for external bus expansion. The on-chip 10-bit ADC can reach 100 ksps and is supported by up to twelve input channels, which is sufficient for sensor interfaces in industrial and instrumentation systems.
Architecturally, the PIC18LF6525 uses a Harvard-class 8-bit RISC core with a 16-bit instruction word, an 8-level hardware stack, and a 31-level software-managed stack for high-level language support. The 4.2 V to 5.5 V range quoted on distributor pages reflects the parametric ADC specification; the device itself supports a wider operating voltage range down to 2.0 V. Low-power nanoWatt technology features include multiple idle and sleep modes, an ultra-low-power wake-up timer, and software-controlled oscillator switching.
Typical applications for the PIC18LF6525T-I/PT include industrial automation controllers, building HVAC and access-control panels, instrumentation front-ends with LCD/keypad interfaces, automotive body and chassis subsystems (non-safety), and consumer appliances requiring moderate Flash headroom (48 KB) and significant I/O count (54 lines). The combination of an 8-bit core with strong peripherals makes it well-suited for legacy firmware migration onto a stable, long-life Microchip platform.
Designers should note that the LF variants add voltage-minimum operation down to 2.0 V, which is essential for battery-backed designs; when migrating between PIC18F6525 and PIC18LF6525 always confirm the brown-out reset voltage and the ADC reference selection. The parallel slave port allows direct connection to an external host CPU for use as a peripheral co-processor, and the large pin count (TQFP-64) provides ample I/O for keypad scanning and character LCD drives.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF6525T-I/PT — 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 PIC18LF6525T-I/PT (cùng hình factor và footprint) — khác nhau ở Package, Timers, ADC, Core Architecture, Program Memory (Flash).
PIC18LF6520T-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F6627T-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F6622T-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF6722T-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F8722T-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF6525T-I/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit PIC18F RISC |
| Program Memory (Flash) | 48 KB (24K x 16 words) |
| SRAM | 3.8 KB (3840 bytes) |
| EEPROM | 1 KB |
| Maximum Clock Speed | 40 MHz |
| Supply Voltage Range | 2.0 V to 5.5 V (LF); ADC spec 4.2 V to 5.5 V |
| I/O Pins | 54 |
| ADC | 10-bit, up to 12 channels |
| Timers | 1 x 16-bit + 3 x 8-bit |
| CCP/ECCP Modules | 2 CCP + 1 ECCP |
| Communication Peripherals | 2 x USART, 1 x MSSP (I2C/SPI) |
| Analog Comparators | 2 |
| Parallel Slave Port | Yes |
| Hộp | TQFP-64 (10 x 10 mm, 1.0 mm pitch) |
| Nhiệt độ hoạt động | -40C to +85C (industrial) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 3 (168 hours) |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân PIC18LF6525T-I/PT
| Chân 1 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Chân 2 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Chân 3 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| Chân 4 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC VREF+ |
| Chân 5 | RA4/AN4/T0CKI — PORTA bit 4 / analog input 4 / Timer0 clock |
| Chân 6 | RA5/AN5/SS/LVDIN — PORTA bit 5 / analog input 5 / SPI slave select / LVD input |
| Chân 7 | RA6 — PORTA bit 6 / oscillator output |
| Chân 8 | RA7 — PORTA bit 7 / oscillator input |
| Chân 9 | VSS — Ground reference |
| Chân 10 | VDD — Positive supply (2.0 V to 5.5 V) |
| Chân 11 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| Chân 12 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| Chân 13 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| Chân 14 | RB3/INT3 — PORTB bit 3 / external interrupt 3 |
| Chân 15 | RB4 — PORTB bit 4 |
| Chân 16 | RB5 — PORTB bit 5 |
| Chân 17 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 18 | RB7/PGD — PORTB bit 7 / ICSP data |
| Chân 19 | VSS — Ground reference |
| Chân 20 | VDD — Positive supply (2.0 V to 5.5 V) |
| Chân 21 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator out / clock in |
| Chân 22 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator in / CCP2 |
| Chân 23 | RC2/CCP1 — PORTC bit 2 / CCP1 |
| Chân 24 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 25 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 26 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 27 | RC6/TX1/CK1 — PORTC bit 6 / USART1 TX / clock |
| Chân 28 | RC7/RX1/DT1 — PORTC bit 7 / USART1 RX / data |
| Chân 29 | VSS — Ground reference |
| Chân 30 | VDD — Positive supply (2.0 V to 5.5 V) |
| Chân 31 | RD0/PSP0 — PORTD bit 0 / parallel slave port D0 |
| Chân 32 | RD1/PSP1 — PORTD bit 1 / parallel slave port D1 |
| Chân 33 | RD2/PSP2 — PORTD bit 2 / parallel slave port D2 |
| Chân 34 | RD3/PSP3 — PORTD bit 3 / parallel slave port D3 |
| Chân 35 | RD4/PSP4 — PORTD bit 4 / parallel slave port D4 |
| Chân 36 | RD5/PSP5 — PORTD bit 5 / parallel slave port D5 |
| Chân 37 | RD6/PSP6 — PORTD bit 6 / parallel slave port D6 |
| Chân 38 | RD7/PSP7 — PORTD bit 7 / parallel slave port D7 |
| Chân 39 | VSS — Ground reference |
| Chân 40 | VDD — Positive supply (2.0 V to 5.5 V) |
| Chân 41 | RE0/RD/AN6 — PORTE bit 0 / PSP read strobe / analog 6 |
| Chân 42 | RE1/WR/AN7 — PORTE bit 1 / PSP write strobe / analog 7 |
| Chân 43 | RE2/CS/AN8 — PORTE bit 2 / PSP chip select / analog 8 |
| Chân 44 | RE3 — PORTE bit 3 (input only) |
| Chân 45 | RE4 — PORTE bit 4 (input only) |
| Chân 46 | RE5 — PORTE bit 5 (input only) |
| Chân 47 | RE6 — PORTE bit 6 (input only) |
| Chân 48 | RE7 — PORTE bit 7 (input only) |
| Chân 49 | RF0 — PORTF bit 0 |
| Chân 50 | RF1 — PORTF bit 1 |
| Chân 51 | RF2 — PORTF bit 2 |
| Chân 52 | RF3 — PORTF bit 3 |
| Chân 53 | RF4 — PORTF bit 4 |
| Chân 54 | RF5 — PORTF bit 5 |
| Chân 55 | RF6 — PORTF bit 6 |
| Chân 56 | RF7 — PORTF bit 7 |
| Chân 57 | RG0 — PORTG bit 0 |
| Chân 58 | RG1 — PORTG bit 1 |
| Chân 59 | RG2 — PORTG bit 2 |
| Chân 60 | RG3 — PORTG bit 3 |
| Chân 61 | RG4 — PORTG bit 4 |
| Chân 62 | OSC1 — Crystal oscillator input |
| Chân 63 | OSC2 — Crystal oscillator output |
| Chân 64 | MCLR — Master clear reset (active low) |
Ứng dụng tiêu biểu
PIC18LF6525T-I/PT phù hợp cho 6 Áp dụngs: Industrial Automation Controller, Building HVAC and Access Control Panels, Instrumentation Front-End with LCD/Keypad, Consumer Appliance Main Controller, Automotive Body and Chassis Subsystem, Peripheral Co-Processor via Parallel Slave Port.
Industrial Automation Controller
The PIC18LF6525T-I/PT is well suited for industrial automation PLCs and I/O modules because of its 54 I/O lines, two USART modules (often used for RS-485 Modbus RTU masters or slaves), and the parallel slave port for host-CPU offload. Its 48 KB Flash gives ample headroom for ladder-logic interpreters or state-machine firmware, while the 3.8 KB SRAM supports Modbus frame buffers and PID loop variables. The 10-bit ADC with 12 channels handles analog sensor inputs (4-20 mA, 0-10 V) directly. The LF 2.0 V-5.5 V range accommodates both 24 V-derived 3.3 V rails and battery-backed logic. Compared with newer PIC18FxxK42 parts, this device remains attractive where firmware legacy and long-term supply are critical.
Được đề xuất
Building HVAC and Access Control Panels
HVAC controllers and access-control panels need many digital I/O for relay drivers, keypad scanning, and character LCDs - exactly the use case the PIC18LF6525T-I/PT addresses with 54 I/O, the parallel slave port for a co-processor, and an ECCP module for triac-fired PWM heater control. The 10-bit ADC reads thermistor inputs, while the two analog comparators handle zero-crossing detection for AC line sync. The 48 KB Flash accommodates menu-driven UI code, schedule storage in 1 KB EEPROM, and Modbus RTU or BACnet MS/TP stacks. The industrial -40C to +85C range supports rooftop and unconditioned-space installations. Low-power nanoWatt idle modes keep standby current below 1 mA for battery-backed RTC operation.
Được đề xuất
Instrumentation Front-End with LCD/Keypad
Bench instruments (digital multimeters, process calibrators, lab power supplies) benefit from the PIC18LF6525T-I/PT's combination of a 10-bit ADC, two analog comparators, and abundant I/O for keypad matrix, character LCD, rotary encoder, and buzzer drive. The 48 KB Flash hosts menu systems and calibration tables stored in the 1 KB EEPROM. Two USARTs can drive a front-panel USB-to-UART bridge plus a second isolated RS-485 port for SCPI command parsing. The LF variant's 2.0 V minimum is useful for single-cell Li-ion powered handhelds. The ECCP module can generate PWM excitation for ratiometric sensor bridges, while the parallel slave port enables a host FPGA for high-speed data acquisition.
Được đề xuất
Consumer Appliance Main Controller
Major appliances (washing machines, dishwashers, refrigerators) use an 8-bit MCU to drive user interfaces, motor control PWM, and sensor inputs - the PIC18LF6525T-I/PT fits with its ECCP for motor control, 12 ADC channels for temperature and water-level sensing, and 54 I/O for keypad, LCD, buzzer, and relay banks. The 48 KB Flash holds state-machine firmware with fault diagnostics, while the 1 KB EEPROM stores user settings through power cycles. Two USARTs support diagnostic ports and Bluetooth/wifi module bridges. The industrial temperature grade and RoHS compliance satisfy appliance certification requirements, and the long-life Microchip product cycle (active since early 2000s) gives designers multi-decade supply assurance.
Được đề xuất
Automotive Body and Chassis Subsystem
Non-safety body-electronics modules (mirror controllers, seat-position memory, lighting controllers) commonly use the PIC18LF6525T-I/PT thanks to its 54 I/O, ECCP PWM for lighting fade, and 10-bit ADC for current sensing. The industrial temperature grade meets most cabin requirements, though for under-hood AEC-Q100 qualified designs the automotive-grade PIC18F alternatives should be selected. The 48 KB Flash hosts CAN-friendly state machines and diagnostic firmware; for native CAN support, designers move to the PIC18F4685 family. The parallel slave port allows pairing with an external graphics or communication co-processor. Multiple communication peripherals support LIN via UART plus external transceiver.
Được đề xuất
Peripheral Co-Processor via Parallel Slave Port
The PIC18LF6525T-I/PT can offload real-time I/O, keypad scanning, or PWM generation from a host CPU or FPGA through its parallel slave port (PSP). The host writes control registers and reads status over the 8-bit data bus using RD, WR, and CS lines, freeing the main processor from bit-banging I/O. The MCU's 48 KB Flash and 3.8 KB SRAM allow local firmware with command queues, while the 10-bit ADC provides analog monitoring. Two USARTs and one MSSP can serve as bridges to RS-485 Modbus slaves, I2C sensors, or SPI peripherals. The LF 2.0 V-5.5 V operation interfaces directly with 3.3 V FPGAs and ASICs. Designers typically connect the PSP to an FPGA EMIF or a higher-end MCU's external bus interface.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF6525T-I/PT — 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 | PIC18LF6520T-I/PT | PIC18F6627T-I/PT | PIC18F6622T-I/PT | PIC18LF6722T-I/PT | PIC18F8722T-I/PT |
|---|---|---|---|---|---|---|
| Package | TQFP-64 (10 x 10 mm) | TQFP-64 - same | TQFP-64 - same | TQFP-64 - same | TQFP-64 - same | TQFP-64 - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 48 KB | 32 KB | 96 KB | 64 KB | 128 KB | 128 KB |
| RAM | 3.8 KB | 2 KB | 3.8 KB | 3.8 KB | 3.8 KB | 3.8 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Maximum Clock Speed | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Supply Voltage Range | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) | 4.2 V to 5.5 V (F) | 4.2 V to 5.5 V (F) | 2.0 V to 5.5 V (LF) | 4.2 V to 5.5 V (F) |
| I/O Pins | 54 | 54 | 54 | 54 | 54 | 70 |
| ADC Resolution / Channels | 10-bit / 12 ch | 10-bit / 12 ch | 10-bit / 12 ch | 10-bit / 12 ch | 10-bit / 12 ch | 10-bit / 16 ch |
Bảo phân biệt quan trọng
- Extended 2.0 V minimum supply voltage (LF variant) (vsPIC18F6627T-I/PT)
- Balanced Flash footprint (48 KB) for cost-optimized designs (vsPIC18LF6520T-I/PT)
- Parallel Slave Port for host-CPU co-processing (vsPIC18LF6722T-I/PT)
Ghi chú thiết kế
The PIC18LF6525 supports 2.0 V to 5.5 V operation but the ADC parametric specification is 4.2 V to 5.5 V. Estimated: when running the ADC at lower voltages, VREF must come from the internal band-gap or an external reference; ADC accuracy will degrade. Use a 100 nF decoupling capacitor on each VDD pin pair plus a single 10 uF bulk capacitor near the MCU. The nanoWatt technology idle and sleep modes can reduce quiescent current to single-digit microamperes when the application does not require the ADC active.
TQFP-64 has 0.5 mm lead pitch - place the part on a 4-layer PCB with at least one solid ground plane under the package to provide thermal spreading and reference for the analog inputs. Keep the crystal oscillator traces within 5 mm of the OSC1/OSC2 pins and surround them with a ground pour. Place the ICSP PGC/PGD traces (RB6/RB7) so that an in-circuit programming header can be reached without crossing the analog input area. The parallel slave port pins (RD0-RD7, RE0-RE2) should be routed as an 8-bit bus with matched lengths if connected to an external FPGA or DSP host.
Migrating between PIC18F6525 (F-variant, 4.2 V minimum) and PIC18LF6525 (LF-variant, 2.0 V minimum) without re-validating the brown-out reset and ADC reference settings will cause field failures on brown-out. Always confirm the CONFIG3L register setting when porting firmware between F and LF variants. Also note that the parallel slave port (PSP) is mutually exclusive with the JTAG boundary scan on some PIC18F parts - disable JTAG in CONFIG to free the PSP. The TQFP-64 footprint has a center thermal pad on some variants - check the package drawing before designing the land pattern.
At industrial temperature range (-40C to +85C), the PIC18LF6525 in TQFP-64 (theta_JA approximately 50-60 C/W on a standard 4-layer JEDEC test board) can dissipate up to 1 W at room temperature without additional cooling. Estimated: at 40 MHz operation, the core current draw is roughly 15-20 mA at 5 V and 8-12 mA at 3.3 V, so thermal management is rarely a constraint. Designers running the parallel slave port bus at high speed or driving many GPIO simultaneously should check the absolute maximum supply current specification in DS39646F.
Thông tin tuân thủ
RoHS compliant per Microchip product environmental declaration. Lead-free /PT package code confirms lead-free terminal finish. Halogen-free per Microchip material declaration. Industrial temperature grade - not AEC-Q100 qualified; for automotive applications select the automotive-grade PIC18F alternative.
