PIC18LF46J11T-I/PT - 8-bit 48MHz 64KB Flash MCU | Microchip
料号： PIC18LF46J11T-I/PT ✓ 量产中PIC18LF46J11T-I/PT 概述
What is an 8-bit microcontroller? An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path that integrates a CPU, non-volatile program memory (Flash), volatile data memory (RAM), and a rich set of peripherals such as timers, ADC, communication interfaces, and I/O. Within the broader semiconductor taxonomy, an MCU is a sub-class of microcontroller -> microprocessor -> digital IC -> semiconductor. The PIC18F/LF family from Microchip is widely used in cost-sensitive embedded applications where deterministic real-time performance, low power, and a stable peripheral set are required.
Key features of the PIC18LF46J11T-I/PT include: a high-performance RISC architecture with 16-bit wide instructions and 8-bit data path; an internal 31 kHz to 8 MHz oscillator with PLL up to 48 MHz; multiple low-power sleep modes (Deep Sleep, Run, Idle, Doze); Peripheral Pin Select (PPS) for flexible signal routing; hardware peripherals including 12-bit ADC, multiple PWM outputs, comparators, and enhanced USART, SPI, and I2C; and a wide operating voltage range suitable for 2.0 V to 3.6 V (LF variant) battery-powered designs. The 'LF' prefix indicates low-voltage Flash (F) operation, while the 'T' suffix denotes Tape and Reel packaging and 'I' indicates the -40C to +85C industrial temperature range.
Architecturally, the PIC18LF46J11 uses a 16-bit instruction word with an 8-bit data path and a hardware multiplier, allowing single-cycle MAC operations and efficient C compilation. The device implements nanoWatt XLP technology, providing sub-uA Deep Sleep current and RTC operation directly from a coin cell. The integrated Peripheral Pin Select (PPS) remaps most digital peripherals to any user I/O, dramatically simplifying PCB layout when changing pin assignments.
Typical applications include USB device/host peripherals, graphics and segment LCD driving, industrial sensor hubs, low-power portable instruments, and consumer devices that require rich connectivity (USB, I2C, SPI) within a small board footprint. Compared to Cortex-M0+ MCUs, the PIC18LF46J11T-I/PT offers deterministic interrupt latency and a small, mature toolchain (MPLAB X, XC8). Where to download the datasheet PDF: the manufacturer product page links directly to the official PDF.
When designing with this device, ensure that VDD decoupling (100 nF + bulk) is placed within 5 mm of each supply pin, and verify that the chosen LF operating voltage (2.0 V to 3.6 V) matches your battery or LDO output. Retention and endurance of the on-chip Flash follow the manufacturer datasheet figures, not estimates.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing engineers with an at-a-glance decision matrix for selecting the PIC18LF46J11T-I/PT versus its 44-pin TQFP family peers.
直接替换替代料： PIC18LF46J11T-I/PT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC18LF46J11T-I/PT （相同外形与封装尺寸） ——差异在于 Package, Operating Temperature, Communication Interfaces, Core Architecture, Program Memory (Flash).
PIC18LF46J11-I/PT
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PIC18F46J11T-I/PT
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →PIC18LF45J11T-I/PT
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →PIC18LF46J11T-I/PT 最大额定值与电气特性
| Core Processor | PIC |
| Core Size | 8-bit |
| Core Series | PIC18LF46J11 |
| Program Memory Size | 64 KB (32K x 16) |
| Program Memory Type | FLASH |
| RAM Size | 3.8 KB (3800 x 8) |
| CPU Speed | 48 MHz |
| Performance | 12 MIPS |
| Number of I/O | 34 |
| Operating Voltage | 2.0 V to 3.6 V |
| 工作温度 | -40C to +85C |
| 封装 | 44-TQFP (10x10 mm) |
| 安装类型 | Surface Mount |
| Connectivity | I2C, SPI, UART/USART, USB |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Data Converters | A/D 13x10b |
| Oscillator Type | Internal (31 kHz to 8 MHz) with PLL |
| Low-Power Technology | nanoWatt XLP (Deep Sleep) |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
| Packaging | Tape & Reel (TR) |
PIC18LF46J11T-I/PT 引脚配置
| 引脚 1 | RF0 — Digital I/O / analog input AN5 |
| 引脚 2 | RF1 — Digital I/O / analog input AN4 |
| 引脚 3 | RF2 — Digital I/O / analog input AN3 |
| 引脚 4 | RF3 — Digital I/O / analog input AN2 |
| 引脚 5 | RF4 — Digital I/O / analog input AN1 |
| 引脚 6 | RF5 — Digital I/O / analog input AN0 |
| 引脚 7 | RF6 — Digital I/O |
| 引脚 8 | RF7 — Digital I/O |
| 引脚 9 | RG0 — Digital I/O |
| 引脚 10 | RG1 — Digital I/O |
| 引脚 11 | VDD — Positive supply |
| 引脚 12 | VSS — Ground |
| 引脚 13 | RG2 — Digital I/O |
| 引脚 14 | RG3 — Digital I/O |
| 引脚 15 | RE0 — Digital I/O |
| 引脚 16 | RE1 — Digital I/O |
| 引脚 17 | RE2 — Digital I/O |
| 引脚 18 | VUSB — USB internal transceiver supply |
| 引脚 19 | RB0 — Digital I/O / PGED |
| 引脚 20 | RB1 — Digital I/O / PGEC |
| 引脚 21 | RB2 — Digital I/O |
| 引脚 22 | RB3 — Digital I/O |
| 引脚 23 | D- — USB D- data line |
| 引脚 24 | D+ — USB D+ data line |
| 引脚 25 | RB4 — Digital I/O |
| 引脚 26 | RB5 — Digital I/O |
| 引脚 27 | RB6 — Digital I/O / PGC |
| 引脚 28 | VDD — Positive supply |
| 引脚 29 | VSS — Ground |
| 引脚 30 | RB7 — Digital I/O / PGD |
| 引脚 31 | VSS — Ground |
| 引脚 32 | RC0 — Digital I/O |
| 引脚 33 | RC1 — Digital I/O |
| 引脚 34 | RC2 — Digital I/O |
| 引脚 35 | RC3 — Digital I/O / SCL |
| 引脚 36 | RC4 — Digital I/O / SDA |
| 引脚 37 | RC5 — Digital I/O |
| 引脚 38 | RC6 — Digital I/O / TX |
| 引脚 39 | RC7 — Digital I/O / RX |
| 引脚 40 | RD0 — Digital I/O |
| 引脚 41 | RD1 — Digital I/O |
| 引脚 42 | RD2 — Digital I/O |
| 引脚 43 | RD3 — Digital I/O |
| 引脚 44 | RD4 — Digital I/O |
典型应用
PIC18LF46J11T-I/PT 适用于 6 应用s: USB Device Peripherals, Low-Power Sensor Hubs, Industrial Control Panels, Consumer Audio/Visual Remote Controls, Medical Monitoring Devices (Non-Critical), Educational and Hobbyist Development.
USB Device Peripherals
The PIC18LF46J11T-I/PT is well suited for USB device peripherals such as HID-class input devices, CDC virtual COM ports, and custom USB endpoints. The integrated full-speed USB 2.0 peripheral with on-chip transceiver eliminates the need for an external PHY, while the 48 MHz CPU and 64 KB Flash comfortably host USB stacks plus application logic. Its 2.0 V to 3.6 V supply range allows direct operation from a USB VBUS-derived 3.3 V LDO, simplifying the BOM. The 3.8 KB RAM is sufficient for USB HID and CDC class buffers plus control state.
推荐
Low-Power Sensor Hubs
For battery-powered sensor hubs aggregating temperature, humidity, and motion data over I2C/SPI, the PIC18LF46J11T-I/PT offers nanoWatt XLP technology with sub-microampere Deep Sleep current. The 12 MIPS throughput at 48 MHz allows quick wake-and-sample-then-sleep duty cycles that maximize coin-cell life. The 12-channel 10-bit ADC supports direct sensor signal conditioning, while the Peripheral Pin Select makes board layout flexible. The 2.0 V to 3.6 V supply range permits direct 2xAA alkaline operation without boost conversion.
推荐
Industrial Control Panels
In industrial control panels driving PWM-controlled actuators, the PIC18LF46J11T-I/PT provides multiple PWM outputs, a 12-bit ADC for feedback, and the Peripheral Pin Select for flexible front-panel button routing. The -40C to +85C industrial temperature range covers most factory-floor environments. With 64 KB Flash, the device can host MODBUS or proprietary serial protocols plus application logic without external memory. Hardware brown-out reset and watchdog ensure reliable recovery from supply transients.
推荐
Consumer Audio/Visual Remote Controls
For handheld IR/RF remote controls, the PIC18LF46J11T-I/PT delivers low-cost 8-bit performance with low-power sleep. Its PWM and USART peripherals can drive IR transmit LEDs and decode incoming IR pulses. The 34 I/O pins easily accommodate matrix keypads, LED indicators, and LCD segments. The 2.0 V minimum supply allows 2xAAA cells to operate down to their end-of-life voltage, extending battery replacement intervals significantly.
推荐
Medical Monitoring Devices (Non-Critical)
In non-critical medical monitoring devices such as pill reminders or personal wellness trackers, the PIC18LF46J11T-I/PT provides ample compute for RTC-driven scheduling, LCD segment driving, and basic sensor interfacing. Its hardware peripherals support serial communication to companion Bluetooth or NFC ICs. The industrial temperature range and reliable Flash retention make it suitable for regulated medical designs. Designers should validate against ISO 13485 / IEC 60601 process requirements at the system level.
推荐
Educational and Hobbyist Development
The PIC18LF46J11T-I/PT is widely adopted in university curricula and hobbyist projects because of Microchip's free MPLAB X IDE, free XC8 C compiler, and abundant example code. The 64 KB Flash is generous for student projects involving graphics, USB, or networked sensors. Its 44-TQFP package is breadboard-compatible with popular PIC training boards, and the mature PIC18 instruction set provides a gentle learning curve from 8-bit assembly to C.
推荐
推荐产品汇总
工程参考数据： PIC18LF46J11T-I/PT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC18LF46J11-I/PT | PIC18F46J11T-I/PT | PIC18LF45J11T-I/PT | PIC18LF46J11T-I/ML |
|---|---|---|---|---|---|
| Package | 44-TQFP (10x10) | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-QFN (8x8) - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 64 KB | 64 KB | 64 KB | 32 KB (-50%) | 64 KB |
| RAM Size | 3.8 KB | 3.8 KB | 3.8 KB | 3.8 KB | 3.8 KB |
| Operating Voltage | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.15 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V |
| CPU Speed | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Number of I/O | 34 | 34 | 34 | 34 | 34 |
| USB Peripheral | Yes (full-speed) | Yes | Yes | Yes | Yes |
关键差异点
- Integrated USB 2.0 full-speed peripheral with on-chip transceiver （对比 PIC18LF45J11T-I/PT)
- Wide low-voltage operating range down to 2.0 V （对比 PIC18F46J11T-I/PT)
- Industrial temperature range standard （对比 PIC18LF46J11T-I/ML)
设计说明
Place a 100 nF decoupling capacitor within 5 mm of each VDD pin (pins 11 and 28) and a bulk capacitor (4.7 uF to 10 uF) on the supply rail. The PIC18LF46J11T-I/PT is sensitive to supply transients during high-speed CPU execution; inadequate decoupling can cause spurious resets via the brown-out detector. For USB applications, also decouple VUSB (pin 18) with a 100 nF cap per the manufacturer reference design.
When migrating between LF and F variants, verify the minimum VDD: LF requires 2.0 V minimum while F requires 2.15 V. Operating the F variant below 2.15 V can cause Flash programming failures and unstable operation. Always check the device silicon revision using MPLAB X's Device ID before generating code, since PIC18 J-series silicon errata vary by revision.
The 44-TQFP (10x10 mm) has 0.8 mm pitch - use 0.2 mm traces with 0.4 mm clearance. Route the D+/D- USB differential pair as a 90-ohm matched-length pair on the top layer under a continuous ground pour to maintain USB signal integrity. Place the 27 pF USB regulator capacitors (per Microchip reference design) within 5 mm of D+/D- for slew rate compliance.
合规信息
RoHS and lead-free per Microchip product page. Not AEC-Q100 qualified - choose Q1 automotive variants if needed. Halogen-free per Microchip environmental certification.