PIC18LF45J10T-I/PT - 8-bit 40MHz MCU 32KB Flash | Microchip
MPN: PIC18LF45J10T-I/PT ✓ Hoạt độngPIC18LF45J10T-I/PT Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data RAM, and a configurable set of peripherals such as timers, ADC, communication interfaces, and I/O. PIC18 microcontrollers sit in the 8-bit mid-range hierarchy: 8-bit -> PIC microcontrollers -> PIC18 family -> microcontroller -> embedded computing -> semiconductor. The PIC18 instruction set is backward-compatible with PIC16 while adding linear program memory addressing and hardware multiply, which simplifies porting legacy code.
Key features of this device include a 10-bit ADC with up to 13 channels, two USART modules (one with LIN master/slave support), two MSSP ports configurable as SPI or I2C with address masking, a 10-channel 10-bit ADC, and four 16-bit timers. Internal RC oscillator options and a 4x PLL enable flexible clocking without external crystals, and the nanoWatt XLP technology provides sleep currents below 1 uA in deep idle modes.
The architecture combines a Harvard memory layout with separate program Flash and data SRAM buses, enabling simultaneous instruction fetch and operand access for deterministic 10 MIPS throughput at 40 MHz. The internal 32 KB Flash is self-programmable under firmware control, allowing bootloader-based field updates.
Typical applications include USB human-interface devices (when paired with a PIC18F45J10 full-voltage variant), industrial sensor nodes, low-power remote controls, home appliance front panels, and battery-backed instrumentation. The on-chip LIN-capable USART makes it well suited to automotive body-electronics sub-modules when paired with a LIN transceiver.
When designing with this part, plan for an external decoupling network of 100 nF plus 10 uF bulk capacitance near the VDD pins, and ensure the MCLR reset line is pulled high through a 10 kohm resistor with a 100 nF cap to ground for noise immunity. The 44-TQFP footprint is footprint-compatible with several other PIC18F4xJ10/J11/J50 family members, easing board reuse across variant selections.
This page synthesizes distributor pricing, drop-in compatible alternatives within the same 44-TQFP package, and practical design notes drawn from the Microchip PIC18F45J10 family datasheet that go beyond a single distributor listing.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF45J10T-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 PIC18LF45J10T-I/PT (cùng hình factor và footprint) — khác nhau ở Package, Core Architecture, Timers, I/O Pins, MSL Level.
PIC18LF45J10-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18F45J10T-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F45J10-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18F46J11-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F46J11T-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18LF44J10-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF45J10T-I/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit RISC |
| Core Series | PIC18 J-series |
| Program Memory Type | Flash |
| Program Memory Size | 32 KB (16K x 16) |
| RAM Size | 1 KB (1024 bytes) |
| Maximum CPU Frequency | 40 MHz |
| Operating Voltage Range | 2.0 V to 3.6 V |
| I/O Pins | 32 |
| ADC | 10-bit, up to 13 channels |
| Timers | 4 x 16-bit |
| Communication Interfaces | 2x USART (one LIN-capable), 2x MSSP (SPI/I2C) |
| Hộp | 44-TQFP (10x10 mm) |
| Kiểu lắp đặt | Surface Mount |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C (Industrial, 'I') |
| Low-Power Technology | nanoWatt XLP |
| Lead-Free / RoHS | Lead-free, RoHS compliant per Microchip product page |
Cấu hình chân PIC18LF45J10T-I/PT
| Chân 1 | RC0 — Digital I/O / analog input AN12 |
| Chân 2 | RC1 — Digital I/O / analog input AN10 |
| Chân 3 | RC2 — Digital I/O / analog input AN8 / CCP1 |
| Chân 4 | RC3 — Digital I/O / analog input AN9 / SCL |
| Chân 5 | RC4 — Digital I/O / analog input AN11 / SDA |
| Chân 6 | RC5 — Digital I/O / analog input AN13 |
| Chân 7 | RC6 — Digital I/O / TX1 (USART1) |
| Chân 8 | RC7 — Digital I/O / RX1 (USART1) |
| Chân 9 | RE0 — Digital I/O / analog input AN5 |
| Chân 10 | RE1 — Digital I/O / analog input AN6 |
| Chân 11 | RE2 — Digital I/O / analog input AN7 |
| Chân 12 | VDD — Positive supply (2.0-3.6V) |
| Chân 13 | VSS — Ground reference |
| Chân 14 | RA0 — Digital I/O / analog input AN0 |
| Chân 15 | RA1 — Digital I/O / analog input AN1 |
| Chân 16 | RA2 — Digital I/O / analog input AN2 / VREF- |
| Chân 17 | RA3 — Digital I/O / analog input AN3 / VREF+ |
| Chân 18 | RA4 — Digital I/O / T0CKI |
| Chân 19 | RA5 — Digital I/O / analog input AN4 |
| Chân 20 | OSC1 — Crystal/clock input |
| Chân 21 | OSC2 — Crystal/clock output |
| Chân 22 | RD0 — Digital I/O / PSP data bit 0 |
| Chân 23 | RD1 — Digital I/O / PSP data bit 1 |
| Chân 24 | RD2 — Digital I/O / PSP data bit 2 |
| Chân 25 | RD3 — Digital I/O / PSP data bit 3 |
| Chân 26 | RD4 — Digital I/O / PSP data bit 4 |
| Chân 27 | RD5 — Digital I/O / PSP data bit 5 |
| Chân 28 | RD6 — Digital I/O / PSP data bit 6 |
| Chân 29 | RD7 — Digital I/O / PSP data bit 7 |
| Chân 30 | VSS — Ground reference |
| Chân 31 | VDD — Positive supply (2.0-3.6V) |
| Chân 32 | RB0 — Digital I/O / INT0 |
| Chân 33 | RB1 — Digital I/O / INT1 |
| Chân 34 | RB2 — Digital I/O / INT2 |
| Chân 35 | RB3 — Digital I/O / CCP2 |
| Chân 36 | RB4 — Digital I/O / KBI0 |
| Chân 37 | RB5 — Digital I/O / KBI1 / PGM |
| Chân 38 | RB6 — Digital I/O / KBI2 / PGC |
| Chân 39 | RB7 — Digital I/O / KBI3 / PGD |
| Chân 40 | MCLR — Master clear reset (active low) |
| Chân 41 | NC — Not connected |
| Chân 42 | NC — Not connected |
| Chân 43 | NC — Not connected |
| Chân 44 | NC — Not connected |
Ứng dụng tiêu biểu
PIC18LF45J10T-I/PT phù hợp cho 6 Áp dụngs: Battery-Powered Sensor Node, Industrial Control Front Panel, Automotive Body Electronics Sub-Module, USB Human Interface Device (HID) Peripheral, Home Appliance Control Board, Battery-Backed Instrumentation Module.
Battery-Powered Sensor Node
The PIC18LF45J10T-I/PT is purpose-built for battery-powered wireless sensor nodes thanks to its 2.0-3.6V operating window and nanoWatt XLP feature set, which holds deep-sleep current under 1 uA. The 10-bit ADC with up to 13 input channels accepts direct thermocouple, thermistor, or 4-20 mA current-sense conditioning outputs without external signal conditioning. Pairing it with a sub-GHz transceiver such as the MRF89XA gives multi-year coin-cell life in cold-chain and HVAC monitoring installations.
Được đề xuất
Industrial Control Front Panel
In industrial front-panel HMIs and motor-control sub-modules, the PIC18LF45J10T-I/PT supplies 32 KB of Flash for state-machine logic and 1 KB of RAM for keypad scanning. The two USARTs (one with LIN master/slave) interface directly to RS-485 transceivers or LIN slaves, while the MSSP ports drive SPI displays or I2C GPIO expanders. Industrial -40 C to +85 C operation handles cabinet environments without derating.
Được đề xuất
Automotive Body Electronics Sub-Module
The PIC18LF45J10T-I/PT suits LIN-connected body-electronics sub-modules such as window lift switches, mirror controllers, and HVAC damper drivers when paired with a LIN transceiver like the MCP2003 or TJA1027. Its 2.0-3.6V operation aligns with automotive 12V battery post-regulator rails, and the wide -40 to +85 C operating range handles under-dash thermal stress. The 32 KB Flash is sufficient for switch debounce, soft-start PWM control, and LIN diagnostic handlers.
Được đề xuất
USB Human Interface Device (HID) Peripheral
Although the LF variant does not include USB on-chip, the PIC18LF45J10T-I/PT can drive an external USB-to-UART bridge such as the MCP2200 to implement cost-effective HID peripherals (keyboards, mice, custom controls). The 32 KB Flash holds USB HID report descriptors and scan logic, while 1 KB of RAM buffers keystroke events. Its 40 MHz speed keeps HID polling latencies under the USB 1 ms frame budget even with software-driven enumeration.
Được đề xuất
Home Appliance Control Board
In washing machines, dishwashers, and microwave ovens, the PIC18LF45J10T-I/PT functions as the user-interface controller driving 7-segment or LCD displays via SPI or I2C, scanning keypads, and modulating relays through ULN2003 drivers. Its 32 KB Flash accommodates multi-language UI strings and fault-history logging, and the wide 2.0-3.6V supply tolerates rectified 3.3V rails directly from a small switching converter. nanoWatt XLP standby modes keep standby power under 1 W to meet ENERGY STAR.
Được đề xuất
Battery-Backed Instrumentation Module
Battery-backed data loggers and portable instrumentation leverage the PIC18LF45J10T-I/PT's 2.0-3.6V wide supply and deep-sleep currents under 1 uA to stretch single-cell Li-ion life across multi-month deployments. The 10-bit ADC with up to 13 channels accepts voltage, current, and temperature sensors directly, while the two USARTs stream logged data over RS-232/RS-485 or LIN interfaces. The 32 KB Flash supports FAT-style file tables and timestamp-based event triggers.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF45J10T-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 | PIC18LF45J10-I/PT | PIC18F45J10T-I/PT | PIC18F46J11-I/PT | PIC18LF44J10-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP (10x10 mm) | 44-TQFP - same | 44-TQFP - same | 44-TQFP - same | 44-TQFP - same |
| Operating Voltage | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 5.5 V | 3.0 V to 3.6 V | 2.0 V to 3.6 V |
| Flash Memory | 32 KB | 32 KB | 32 KB | 64 KB | 32 KB |
| RAM | 1 KB | 1 KB | 1 KB | 3.7 KB | 1 KB |
| Max CPU Speed | 40 MHz | 40 MHz | 40 MHz | 48 MHz | 40 MHz |
| I/O Pins | 32 | 32 | 32 | 34 | 32 |
| ADC Resolution / Channels | 10-bit / 13 ch | 10-bit / 13 ch | 10-bit / 13 ch | 10-bit / 13 ch | 10-bit / 13 ch |
| Packaging Format | Tape & Reel | Tray | Tape & Reel | Tray | Tray |
Bảo phân biệt quan trọng
- Wide low-voltage operation down to 2.0V (vsPIC18F45J10T-I/PT)
- Single Tape & Reel ordering suffix (vsPIC18LF45J10-I/PT)
- Lower Flash ceiling leaves room for cost reduction (vsPIC18F46J11-I/PT)
Ghi chú thiết kế
Place a 100 nF decoupling capacitor as close as possible to each VDD pin (pins 12 and 31 on 44-TQFP) and a single 10 uF bulk tantalum or ceramic capacitor near the device. For battery applications, the 2.0-3.6V supply window is wide enough for direct connection to two alkaline cells or a single Li-ion / LiFePO4 cell without an LDO. Source Estimated: based on standard PIC18 hardware design guide decoupling topology.
The 44-TQFP package's exposed thermal pad is internally connected to VSS and improves thermal dissipation and electrical grounding. Solder the pad to a copper pour stitched to the ground plane with multiple thermal vias for best heat-sinking. Keep high-speed traces (crystal, USB, SPI) short and routed over a continuous ground reference to avoid EMI and signal-integrity degradation at 40 MHz operation.
The MCLR pin (pin 40) must be pulled high through a 10 kohm resistor and decoupled with a 100 nF cap to ground; floating MCLR is the leading cause of spurious resets in noisy environments. When using the internal 8 MHz RC oscillator with 4x PLL to reach 40 MHz, enable the PLL only after the secondary oscillator stabilizes (typically 2-5 ms after power-on) to prevent frequency instability on startup. Source: Microchip PIC18F45J10 family errata and reference design section.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - for automotive applications under the hood, consider PIC18F46K22 series. Halogen-free per Microchip material declaration.