PIC18LF4331T-I/PT - 40MHz 8-bit MCU 8KB FLASH 44-TQFP | Microchip
料号： PIC18LF4331T-I/PT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $7.12 | $7.12 |
| 10 | $6.4 | $64.00 |
| 100 | $5.35 | $535.00 |
| 500 | $4.75 | $2,375.00 |
| 1,000 | $4.2 | $4,200.00 |
PIC18LF4331T-I/PT 概述
What is an 8-bit microcontroller? An 8-bit microcontroller (MCU) is a single-chip computer that processes data in 8-bit-wide chunks, integrates CPU core, program memory (FLASH/ROM), data memory (RAM), and a rich peripheral set including timers, ADC, PWM, and communication interfaces. Positioned in the taxonomy: 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor device. The PIC18 family uses an enhanced Harvard RISC architecture with 16-bit instructions and 8-bit data paths, balancing deterministic real-time control with low power consumption for cost-sensitive industrial and consumer applications.
The 'LF' designation indicates an extended-voltage variant operating down to 2.0V, making the part suitable for battery-powered designs across the industrial -40C to +85C range. The 'T' suffix marks Tape-and-Reel packaging for high-volume SMT assembly, while 'I/PT' confirms the industrial temperature grade and TQFP-44 pinout. The integrated 10-bit ADC (up to 9 channels), two CCP/ECCP modules, two analog comparators, and the dedicated Motion Feedback Module (10-bit Slope ADC) eliminate the need for external motor-control ICs in many single-axis BLDC designs.
Typical applications span sensorless BLDC fan and pump controllers, permanent-magnet synchronous motor (PMSM) drivers for HVAC blowers, small appliance motor control (vacuum cleaners, washing-machine pumps), and stepper/switched-reluctance drives in industrial automation. Communication peripherals include I2C, SPI, and an enhanced USART with autobaud detection, easing integration with sensors and HMI modules.
When designing with this MCU, verify that the application's code footprint does not exceed the 8 KB FLASH limit; the PIC18K-series (e.g., PIC18F26K22) is the recommended migration path if software growth requires more headroom. Always read-latch-protect configuration bits and use the ICD3 or PICkit 4 programmer for in-circuit debug access.
This page consolidates distributor stock, parametric same-package alternatives, and application-level design notes that complement the datasheet block diagrams for production engineers evaluating 44-pin TQFP motor-control MCUs.
直接替换替代料： PIC18LF4331T-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： PIC18LF4331T-I/PT （相同外形与封装尺寸） ——差异在于 Package, Operating Temperature, Core, Program Memory (Flash), Mounting Type.
快速对比工具——选择替代料号进行并排对比：
PIC18LF4331-I/PT
✅ 直接替换✓ 有现货
$5.92 / 个
查看数据手册 →PIC18F4331-I/PT
✅ 直接替换✓ 有现货
$3.05 / 个
查看数据手册 →PIC18F4331T-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC18LF4431-I/PT
✅ 直接替换✓ 有现货
$5.45 / 个
查看数据手册 →PIC18LF4431T-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC18LF4331T-I/PT 最大额定值与电气特性
| Series | PIC18F (PIC18LF4331) |
| Core Architecture | 8-bit PIC18 RISC (Enhanced Harvard) |
| Core Size | 8-bit |
| Maximum CPU Speed | 40 MHz |
| Program Memory (FLASH) | 8 KB (4K x 16 words) |
| RAM | 768 bytes |
| I/O Pins | 34 |
| 封装 | 44-TQFP (10x10 mm), suffix /PT |
| 安装类型 | Surface Mount, Tape & Reel (T suffix) |
| Supply Voltage Range | 2.0 V to 5.5 V (LF extended-voltage family) |
| 工作温度 | -40C to +85C (industrial, 'I') |
| ADC | 10-bit, up to 9 channels |
| PWM Module | Power Control PWM (PCPWM), 14-bit resolution, 6 outputs |
| Communication Interfaces | I2C, SPI, Enhanced USART (with autobaud) |
| Timers | TMR0/TMR1/TMR2/TMR3 + Motion Feedback Module (10-bit Slope ADC) |
| Comparators | 2 analog comparators |
| CCP/ECCP Modules | 2 (1 standard CCP + 1 ECCP) |
| MSL 等级 | MSL3 (per JEDEC J-STD-020, TQFP-44) |
| RoHS 状态 | Compliant |
PIC18LF4331T-I/PT 44-tqfp (10x10 mm), suffix /pt 引脚配置指南
PIC18LF4331T-I/PT（44-tqfp (10x10 mm), suffix /pt 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： PIC18LF4331T-I/PT.
请参阅 数据手册 以查看完整引脚配置。
典型应用
PIC18LF4331T-I/PT 适用于 6 应用s: Sensorless BLDC Motor Controller, PMSM Drive for HVAC Blowers, Industrial Pump and Fan VFDs, Small Appliance Motor Control, Switched-Reluctance Motor (SRM) Drive, Industrial Automation Sensor Node.
Sensorless BLDC Motor Controller
The PIC18LF4331T-I/PT is purpose-built for sensorless BLDC motor control: its 14-bit-resolution Power Control PWM module generates 3-phase complementary outputs with programmable dead-time (80 ns resolution), while the 10-bit Motion Feedback Module (Slope ADC) directly samples BEMF voltages from the floating phase without external op-amps. Operating voltage of 2.0V-5.5V supports both 3.3V and 5V supply rails typical of small fans and pumps.
推荐
PMSM Drive for HVAC Blowers
Permanent-magnet synchronous motor (PMSM) drive designs in HVAC blowers benefit from the PIC18LF4331T-I/PT's integrated 6 PWM outputs and 9-channel ADC. The 40 MHz core sustains field-oriented control loops with a 20 kHz PWM carrier while leaving CPU bandwidth for airflow regulation. The LF 2.0V-5.5V range simplifies integration with 24V-to-5V bias designs, and the -40C to +85C industrial rating covers outdoor unit temperature stress.
推荐
Industrial Pump and Fan VFDs
Variable-frequency drives for industrial pumps and fans up to 1 HP leverage the PIC18LF4331T-I/PT's Power Control PWM for V/Hz or field-oriented control. The 768-byte SRAM is sufficient for the PI controllers and lookup tables of these moderate-speed drives; 8 KB FLASH comfortably hosts reference firmware such as the Microchip AN1078 sensorless BLDC and AN1160 PFC reference designs. Internal 10-bit ADC and 2 comparators eliminate external signal conditioning.
推荐
Small Appliance Motor Control
Washing-machine pumps, dishwasher circulation pumps, vacuum-cleaner BLDC motors, and refrigerator compressor controllers leverage the PIC18LF4331T-I/PT's single-chip integration. The 34 I/O pins directly drive H-bridges and triac commutation circuits, while I2C/SPI expand into EEPROM storage and user-interface buttons. The LF supply range allows operation directly from a rectified 3.3V rail, reducing BOM cost in mass-market consumer appliances.
推荐
Switched-Reluctance Motor (SRM) Drive
Switched-reluctance motor drives use the PIC18LF4331T-I/PT's precise PWM timing to commutate each phase independently. The 10-bit Motion Feedback Module samples the incremental encoder or resolver position feedback, and the high-speed ADC triggers torque-ripple reduction control loops at every 100 us rotor-position event. Industrial -40C to +85C rating supports unenclosed industrial motor housings.
推荐
Industrial Automation Sensor Node
Beyond motor control, the PIC18LF4331T-I/PT fits industrial sensor nodes that require local actuation and deterministic serial communication. Its Enhanced USART with autobaud detection directly interfaces RS-485 transceivers for Modbus RTU master/slave nodes, while the I2C bus links to EEPROM, RTCs, and 4-20 mA loop ADCs. The industrial -40C to +85C temperature range and low 1 uA sleep current enable battery-backed remote installations.
推荐
推荐产品汇总
工程参考数据： PIC18LF4331T-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 | PIC18LF4331-I/PT | PIC18F4331-I/PT | PIC18F4331T-I/PT | PIC18LF4431-I/PT | PIC18LF4431T-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same |
| Supply Voltage | 2.0V to 5.5V (LF) | 2.0V to 5.5V (LF) | 4.2V to 5.5V (F only) | 4.2V to 5.5V (F only) | 2.0V to 5.5V (LF) | 2.0V to 5.5V (LF) |
| Max CPU Speed | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Program FLASH | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| RAM | 768 bytes | 768 bytes | 768 bytes | 768 bytes | 768 bytes | 768 bytes |
| I/O Pins | 34 | 34 | 34 | 34 | 36 | 36 |
| PWM Channels | 6 Power Control PWM | 6 Power Control PWM | 6 Power Control PWM | 6 Power Control PWM | 8 Power Control PWM | 8 Power Control PWM |
| ADC Channels | 9 (10-bit) | 9 (10-bit) | 9 (10-bit) | 9 (10-bit) | 13 (10-bit) | 13 (10-bit) |
| Packaging Format | Tape & Reel (T) | Tray | Tray | Tape & Reel | Tray | Tape & Reel |
| Lifecycle | Active | Active | Active | Active | Active | Active |
关键差异点
- Low-voltage LF supply range supports 3.3V battery-powered designs （对比 PIC18F4331-I/PT)
- Integrated 14-bit Power Control PWM with motion feedback module （对比 PIC18F45K40-I/PT)
- Extended motor-control I/O at the same 44-TQFP footprint （对比 PIC18LF4431T-I/PT)
- 8 KB FLASH vs 64 KB in newer PIC18F26K22 - migration headroom （对比 PIC18F4331T-I/PT (5V-only))
设计说明
Estimated: at 5V VDD and 40 MHz CPU clock with all peripherals disabled, PIC18LF4331T-I/PT core current is approximately 11 mA per Microchip datasheet; at 3.3V VDD the same workload drops to ~6 mA. Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of the TQFP-44 pin 14, plus a bulk 4.7-10 uF tantalum or polymer cap on each VDD/VSS pair. The on-chip LDO requires a 10 uF reservoir cap on VDDCORE for FLASH programming stability.
The 44-TQFP (10x10 mm) package has a theta_JA of approximately 70 C/W on a 2-layer PCB with no thermal vias. Continuous operation at full 40 MHz across 5V VDD produces a worst-case ~1.5W internal dissipation in motor-control loops - on enclosed motor housings, route top-side copper pours under the exposed paddle region and stitch 6-8 thermal vias to inner ground planes to keep junction below 100C.
TQFP-44 land pattern requires 0.8 mm pitch pads (IPC-7351 nominal). Use NSMD (non-solder-mask-defined) pads on outer-layer footprints for consistent stencil aperture alignment; 6 mil stencil thickness for 0.8 mm pitch devices prevents solder-bridging between adjacent pins. Route ADC input traces (RA0-RA5, RE0-RE2) as far from PWM and oscillator nets as possible to avoid coupling into the 10-bit ADC.
Always program the configuration register bits via ICSP before connecting any I/O load - unconfigured MCLR can lock the part in reset. The Power Control PWM outputs (RC1, RC2, RE0-RE4) require explicit PPS selection for advanced routing. Avoid using RC7/RC6 with the internal oscillator only if the ICSP pins will be used in production; reserve them for in-circuit debug.
合规信息
RoHS and REACH compliant per Microchip product environmental compliance documents. Lead-free finish confirmed for /PT TQFP lead-pitch. AEC-Q100 not applicable - PIC18LF4331 family targets industrial motor control, not automotive. Halogen-free status not stated in publicly available datasheet, set to unknown per Data Authenticity Rule 2.
