PIC18F45J10-I/PT - 8-bit 40MHz 32KB Flash MCU | Microchip TQFP-44
MPN： PIC18F45J10-I/PT ✓ 啟用中PIC18F45J10-I/PT 概覽
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash/ROM), volatile working memory (RAM), peripherals, and I/O on one die. Within the broader taxonomy, an 8-bit MCU such as this PIC18F45J10 belongs to the microcontrollers family of integrated circuits, which itself sits under the Integrated Circuits category of discrete semiconductors. Designers choose 8-bit PIC parts when deterministic interrupt latency, simple toolchain (MPLAB X IDE), and low unit cost outweigh the throughput advantages of 16/32-bit Cortex-M alternatives.
Key features of the PIC18F45J10-I/PT include 32KB Flash with 1k endurance, emulated EEPROM via Flash self-write, an enhanced USART with LIN master/slave support, two MSSP peripherals (SPI / I2C with address masking), a 10-bit A/D converter with up to 13 input channels, and nanoWatt power-management modes for battery-friendly designs. The device operates from 4.2V to 5.5V (PIC18 "J" series is 3.3V core / 5V-tolerant I/O on selected pins per datasheet) and provides 36 digital I/O pins.
Architecturally, the PIC18F45J10 uses a Harvard RISC architecture with separate program and data buses and a 16-bit instruction word, achieving one instruction per cycle (4 clocks) at 40MHz. Its vectored interrupt controller, hardware multiplier (8x8 single-cycle), and on-chip ICD (in-circuit debugger) support shorten development cycles. Power-managed Run, Idle, and Sleep modes with on-the-fly oscillator switching suit mixed-performance / low-power products.
Typical applications include consumer appliance control panels, low-cost sensor hubs, USB-to-UART bridges (paired with an external USB transceiver), small graphical or segment LCD drivers, automotive body modules, and industrial sensor interface boards. Two I2C/SPI ports allow simultaneous connection of a sensor array plus an external EEPROM or display. Designers should reserve a clean analog AVDD/AVSS pair for the A/D converter, place a 0.1uF decoupling cap on every VDD pin within 5mm, and tie MCLR through a 10k pull-up to VDD. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 PIC18F45J10-I/PT — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC18F45J10-I/PT （相同外形與佔位） — 差異在於 Package, Timers, Operating Temperature, I/O Pins, Core Architecture.
PIC18F44J10-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F45K80-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F46J11-I/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18F45J10-I/ML
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC18F44K22-I/PT
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PIC18F45J10-I/PT 最大額定值與電氣特性
| Core Architecture | PIC18 8-bit enhanced RISC |
| CPU Speed | 40 MHz (16 MIPS) |
| Program Memory (Flash) | 32 KB (16K x 16 words) |
| RAM | 1024 bytes (1 KB) |
| Data EEPROM | Emulated in Flash (no dedicated EEPROM) |
| I/O Pins | 36 |
| A/D Converter | 10-bit, up to 13 channels |
| Supply Voltage (VDD) | 4.2 V to 5.5 V |
| 工作溫度範圍 | -40 C to +85 C (Industrial, "I") |
| 封裝 | TQFP-44 (PT) 10x10 mm |
| 安裝類型 | Surface Mount |
| Communication Interfaces | 1x Enhanced USART (LIN), 2x MSSP (SPI / I2C) |
| ICSP / ICD Support | Yes (In-Circuit Serial Programming and Debug) |
| Power-Saving Modes | nanoWatt: Run, Idle, Sleep |
| MSL 等級 | 3 (per JEDEC J-STD-020) |
| RoHS 狀態 | Compliant |
PIC18F45J10-I/PT 腳位配置
| 腳位 1 | MCLR#/RE3 — Master Clear (Reset) input; RE3 digital input only when not used as MCLR |
| 腳位 2 | RA0/AN0 — PORTA bit 0; analog input 0 |
| 腳位 3 | RA1/AN1 — PORTA bit 1; analog input 1 |
| 腳位 4 | RA2/AN2/VREF- — PORTA bit 2; analog input 2; A/D VREF- |
| 腳位 5 | RA3/AN3/VREF+ — PORTA bit 3; analog input 3; A/D VREF+ |
| 腳位 6 | RA4 — PORTA bit 4 (open-drain) |
| 腳位 7 | RA5/AN4 — PORTA bit 5; analog input 4 |
| 腳位 8 | VSS — Ground reference |
| 腳位 9 | OSC1/CLKI/RA13 — Crystal oscillator input or external clock |
| 腳位 10 | OSC2/CLKO/RA14 — Crystal oscillator output or FOSC/4 clock out |
| 腳位 11 | RC0 — PORTC bit 0 |
| 腳位 12 | RC1 — PORTC bit 1 |
| 腳位 13 | RC2 — PORTC bit 2 |
| 腳位 14 | RC3 — PORTC bit 3 |
| 腳位 15 | RC4 — PORTC bit 4 |
| 腳位 16 | RC5 — PORTC bit 5 |
| 腳位 17 | RC6 — PORTC bit 6 |
| 腳位 18 | RC7 — PORTC bit 7 |
| 腳位 19 | VSS — Ground reference |
| 腳位 20 | VDD — Positive supply 4.2V to 5.5V |
| 腳位 21 | RB0/AN12 — PORTB bit 0; analog input 12 |
| 腳位 22 | RB1/AN10 — PORTB bit 1; analog input 10 |
| 腳位 23 | RB2/AN8 — PORTB bit 2; analog input 8 |
| 腳位 24 | RB3/AN9 — PORTB bit 3; analog input 9 |
| 腳位 25 | RB4 — PORTB bit 4 |
| 腳位 26 | RB5 — PORTB bit 5 |
| 腳位 27 | RB6/PGC — PORTB bit 6; ICSP clock (PGEC) |
| 腳位 28 | RB7/PGD — PORTB bit 7; ICSP data (PGED) |
| 腳位 29 | VSS — Ground reference |
| 腳位 30 | VDD — Positive supply 4.2V to 5.5V |
| 腳位 31 | RD0 — PORTD bit 0 |
| 腳位 32 | RD1 — PORTD bit 1 |
| 腳位 33 | RD2 — PORTD bit 2 |
| 腳位 34 | RD3 — PORTD bit 3 |
| 腳位 35 | RD4 — PORTD bit 4 |
| 腳位 36 | RD5 — PORTD bit 5 |
| 腳位 37 | RD6 — PORTD bit 6 |
| 腳位 38 | RD7 — PORTD bit 7 |
| 腳位 39 | VSS — Ground reference |
| 腳位 40 | VDD — Positive supply 4.2V to 5.5V |
| 腳位 41 | RE0/AN5 — PORTE bit 0; analog input 5 |
| 腳位 42 | RE1/AN6 — PORTE bit 1; analog input 6 |
| 腳位 43 | RE2/AN7 — PORTE bit 2; analog input 7 |
| 腳位 44 | AVDD — Analog supply for A/D converter |
典型應用
PIC18F45J10-I/PT 適用於 6 應用s: Consumer Appliance Control Panels, Industrial Sensor Interface Boards, USB-to-UART Bridge Dongles, Automotive Body Control Modules (Non-Safety), Low-Cost Graphical/Segment LCD Driver, IoT Sensor Edge Node.
Consumer Appliance Control Panels
The PIC18F45J10-I/PT suits washing-machine, dishwasher, and microwave front-panel controllers because 32KB Flash holds UI state machines plus display drivers while the 1KB RAM is enough for sensor smoothing buffers. Its 36 I/O pins drive 7-segment LEDs, keypads, and rotary encoders without external I/O expanders. The Enhanced USART with LIN support simplifies connection to a power-supply or motor-control sub-board, and nanoWatt Sleep current keeps standby power below 0.5W to meet Energy Star and EU Ecodesign 2026 thresholds.
推薦
Industrial Sensor Interface Boards
With its 10-bit A/D offering up to 13 input channels and 2 MSSP ports, the PIC18F45J10-I/PT integrates temperature, pressure, and flow sensor conditioning plus SPI or I2C comms in a single chip. The 40MHz core runs model-predictive loops at sub-millisecond periods, while industrial-grade -40C to +85C operation tolerates factory-floor environments. The 36 I/O drive LEDs and relays for local fault indication without external glue logic, and ICSP debug pins (PGEC2/PGED2) shorten field-rework bring-up.
推薦
USB-to-UART Bridge Dongles
Pair the PIC18F45J10-I/PT with an external USB transceiver such as the MCP2200 or FT230XS-R to build a low-cost USB-to-UART debug or firmware-update bridge. Its Enhanced USART handles up to 115.2 kbps reliably while the second MSSP drives an SPI flash for configuration storage. The TQFP-44 10x10mm package leaves room for a USB-B micro connector on a 2-layer PCB, and nanoWatt Sleep drops dongle quiescent power below 100uA when the host is suspended.
推薦
Automotive Body Control Modules (Non-Safety)
For non-safety body modules such as interior lighting, mirror adjust, and seat-position controllers, the PIC18F45J10-I/PT provides enough Flash and I/O while supporting LIN bus via the Enhanced USART for sub-network communication. Designers should add external TVS diodes and follow AEC-Q100 layout guidelines; for safety-critical domains move to a Q1-graded PIC18F46J11 automotive variant. The industrial -40C to +85C grade handles cabin environments, and 36 I/O comfortably drive LED drivers and H-bridge enable lines.
推薦
Low-Cost Graphical/Segment LCD Driver
The PIC18F45J10-I/PT's 32KB Flash stores ASCII tables and custom character glyphs for monochrome LCDs, while the two MSSP blocks drive the LCD controller plus a touch-sense IC simultaneously. Its 36 I/O can be remapped to provide the 8-bit data bus plus control lines for common alphanumeric LCDs, eliminating an external parallel expander. The 40MHz core refreshes displays without flicker at 60Hz even with duty-cycled sensor reads in between.
推薦
IoT Sensor Edge Node
With nanoWatt power-managed Sleep under 1uA and an Enhanced USART, the PIC18F45J10-I/PT forms the controller for a battery-powered IoT edge node that wakes periodically to read sensors over I2C or SPI and transmits over a sub-GHz radio or LIN. Its industrial temperature range suits outdoor enclosures, and the 32KB Flash holds a small RTOS or state-machine plus security keys. Pair with a sub-GHz transceiver like the MRF89XA for proprietary wireless links without licensing fees.
推薦
推薦產品摘要
工程參考資料，適用於 PIC18F45J10-I/PT — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC18F44J10-I/PT | PIC18F45K80-I/PT | PIC18F46J11-I/PT | PIC18F44K22-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (PT) 10x10 mm | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same |
| Program Memory (Flash) | 32 KB | 32 KB | 32 KB | 64 KB (+100%) | 64 KB (+100%) |
| RAM | 1 KB | 1 KB | 3.6 KB (+260%) | 3.8 KB (+280%) | 3.6 KB (+260%) |
| Data EEPROM | Emulated (no dedicated) | Emulated (no dedicated) | 1 KB true EEPROM | Emulated (no dedicated) | 1 KB true EEPROM |
| Max CPU Frequency | 40 MHz (16 MIPS) | 40 MHz (16 MIPS) | 64 MHz (16 MIPS) | 48 MHz (16 MIPS) | 64 MHz (16 MIPS) |
| Operating Voltage | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 1.8 V to 5.5 V (wider) | 2.0 V to 3.6 V | 2.3 V to 5.5 V |
| I/O Pins | 36 | 32 (-11%) | 36 (same) | 34 (-6%) | 36 (same) |
| A/D Converter | 10-bit, 13 channels | 10-bit, 13 channels | 12-bit, 12 channels | 10-bit, 12 channels | 10-bit, 14 channels |
主要差異化特點
- Emulated EEPROM vs true EEPROM variants (對比PIC18F45K80-I/PT)
- Higher Flash headroom than the J10 family (對比PIC18F46J11-I/PT)
- Wider operating voltage for mixed-rail designs (對比PIC18F44K22-I/PT)
設計說明
Estimated: Decoupling is critical on PIC18F45J10-I/PT. Place a 0.1uF ceramic capacitor within 5mm of every VDD/AVDD pin and a 10uF bulk tantalum or aluminum polymer capacitor near the package. The PIC18 J-series uses an internal 3.3V regulator for the core - use a low-ESR 10uF tantalum on the core VDD pin rather than relying solely on ceramic. Failure to follow the datasheet decoupling guideline can cause ADC noise and brown-out resets during heavy I/O switching.
Route the 40MHz crystal traces (OSC1/OSC2) symmetrically and keep them shorter than 10mm with a ground guard ring. Place the crystal within 3mm of the MCU pins to minimize loop inductance. For boards mixing analog and digital, isolate the AVDD/VREF traces from switching nodes; the PIC18F45J10 shares AVDD and VDD rails but the datasheet recommends an LC or ferrite bead filter on AVDD if ADC accuracy below 10 LSB is required. Always tie MCLR through a 10k pull-up to VDD and add a 100nF cap to ground to filter ESD.
Do not confuse the PIC18F45J10 J-series with the PIC18F45K22 or PIC18F45K80 K-series. The J-series has a fixed 4.2V-5.5V supply range and an internal 3.3V regulator, while K-series parts operate down to 1.8V. Firmware compiled for one series is generally source-compatible but configuration bits (CONFIG1L/PRIMARY OSC) differ. Also, the J-series has no true EEPROM - storing user data requires Flash self-write emulation with an endurance limit of 1k erase cycles per row. Plan wear-leveling firmware if persistent writes exceed 100 per day.
合規資訊
RoHS/REACH per Microchip product page declaration. Not AEC-Q100 qualified - request PIC18F45J10 VAO variant or use PIC18F46J11-Q1 line for automotive.