PIC18F66K40T-I/PT - 8-Bit 64MHz 64KB Flash MCU TQFP-64 | Microchip
料号： PIC18F66K40T-I/PT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.78 | $3.78 |
| 10 | $3.62 | $36.20 |
| 100 | $3.21 | $321.00 |
| 500 | $2.85 | $1,425.00 |
| 1,000 | $2.52 | $2,520.00 |
PIC18F66K40T-I/PT 概述
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, I/O peripherals, and often communication interfaces on one silicon die. The PIC18 architecture is an 8-bit Harvard RISC core enhanced with a 16-bit instruction word, 31-level hardware stack, and linear memory addressing up to 64 KB. MCUs are positioned within the broader taxonomy of embedded computing as programmable logic devices (PLDs) sitting below microprocessors (MPUs) and digital signal controllers (DSCs) in processing capability but above discrete logic in functional integration.
Key features of this device include eXtreme Low Power (XLP) technology with sub-uA sleep currents suitable for battery-powered designs, a peripheral pin select (PPS) system that allows remapping of digital peripherals to any I/O, and 5V tolerance on most digital I/O pins. The integrated 64 MHz oscillator eliminates the need for an external crystal in many designs, and the 10-bit ADC with up to 47 channels supports mixed-signal applications.
The PIC18F66K40 uses a modified Harvard architecture with separate program Flash and data SRAM buses, allowing simultaneous instruction fetch and data access. Its nanoWatt XLP technology delivers sleep currents below 100 nA in retention modes, and the integrated Core Independent Peripherals (CIPs) - including the Complementary Waveform Generator (CWG), Windowed Watchdog Timer (WWDT), and DMA engine - offload tasks from the CPU to improve efficiency and reduce firmware complexity.
Typical applications include industrial sensor interfaces, low-power IoT edge nodes, automotive body and comfort modules, USB and CAN bridging designs, and consumer white goods. The wide 2.3 V to 5.5 V operating range simplifies designs migrating from legacy 5V PIC16/PIC18 systems to modernized low-power platforms.
Designers should evaluate the 60 I/O budget carefully against the chosen TQFP-64 footprint and verify that the PPS remapping constraints do not conflict with PCB layout. Programming and debugging are supported through Microchip's MPLAB X IDE and ICD/PICkit tools; ensure the ICSP pinout matches the chosen programming header.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet.
直接替换替代料： PIC18F66K40T-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： PIC18F66K40T-I/PT （相同外形与封装尺寸） ——差异在于 Package, ADC, Program Memory (Flash), Comparators, Operating Temperature.
快速对比工具——选择替代料号进行并排对比：
PIC18F66K40-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F66K40T-E/PTVAO
✅ 直接替换✓ 有现货
$4.6 / 个
查看数据手册 →PIC18F66K40T-I/MR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.46 / 个
查看数据手册 →PIC18F66K40-E/PTVAO
✅ 直接替换✓ 有现货
$2.95 / 个
查看数据手册 →PIC18F65K40-I/PT
✅ 直接替换✓ 有现货
$1.95 / 个
查看数据手册 →PIC18F66K40T-I/PT 最大额定值与电气特性
| Core Architecture | PIC18 (8-bit Harvard RISC) |
| Program Memory (Flash) | 64 KB (32K x 16 words) |
| Data SRAM | 3.5 KB (3562 bytes) |
| Maximum CPU Frequency | 64 MHz |
| Supply Voltage (VDD) | 2.3 V to 5.5 V |
| Number of I/O Pins | 60 |
| ADC Resolution | 10-bit |
| 封装 | TQFP-64 (10x10 mm) |
| 安装类型 | Surface Mount |
| 工作温度 | -40C to +85C (Industrial) |
| Low-Power Technology | eXtreme Low Power (XLP) nanoWatt |
| MSL 等级 | 3 |
| RoHS 状态 | Compliant |
| Peripheral Features | PPS, CWG, WWDT, CRC/Memory Scan, DMA |
PIC18F66K40T-I/PT tqfp-64 (10x10 mm) 引脚配置指南
PIC18F66K40T-I/PT（tqfp-64 (10x10 mm) 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： PIC18F66K40T-I/PT.
请参阅 数据手册 以查看完整引脚配置。
典型应用
PIC18F66K40T-I/PT 适用于 7 应用s: Industrial Sensor Hub, IoT Edge Node, Automotive Body Module, USB-to-UART Bridge, Consumer White Goods Control, Portable Medical Device, HVAC Climate Controller.
Industrial Sensor Hub
The PIC18F66K40T-I/PT's 60 I/O pins and 10-bit ADC support multi-sensor acquisition in factory automation. With 64 KB Flash for protocol stacks and Core Independent Peripherals handling timing-critical sampling, the device aggregates analog/digital sensor data and forwards it over UART/SPI. The wide 2.3V-5.5V supply simplifies integration with both 3.3V and 5V transducers, while XLP sleep currents below 100 nA enable battery-backed installations. Peripheral Pin Select (PPS) allows I/O remapping on the fly, easing PCB layout when many sensors must share limited board area.
推荐
IoT Edge Node
For battery-powered IoT edge nodes, the PIC18F66K40T-I/PT's nanoWatt XLP technology delivers sub-uA sleep currents that extend coin-cell lifetime to multiple years. The 64 KB Flash accommodates TLS stacks, and the 64 MHz core provides enough headroom for local pre-processing before transmitting via companion BLE/Wi-Fi modules. The 60 I/O budget leaves ample headroom for sensor add-ons, and PPS allows digital peripherals to be reassigned without PCB rework. The 5V tolerance simplifies direct interfacing to legacy industrial sensors on the same board.
推荐
Automotive Body Module
The PIC18F66K40T-I/PT powers body-control modules where -40C to +85C industrial temperature range handles cabin and under-hood variations. For harsher environments, the PIC18F66K40T-E/PTVAO variant extends to -40C to +125C with AEC-Q100 automotive qualification. Core Independent Peripherals like the Complementary Waveform Generator (CWG) drive motor/lighting loads without CPU intervention, freeing cycles for CAN/LIN communication. 64 KB Flash supports OSEK/ AUTOSAR-compatible firmware, and 60 I/O lines accommodate multiple switch and relay interfaces.
推荐
USB-to-UART Bridge
The PIC18F66K40T-I/PT's 64 MHz CPU and 60 I/O enable implementation of a full-speed USB device controller (via integrated USB peripheral) plus multiple UART/SPI/I2C bridges on a single chip. The 64 KB Flash holds USB stack, class drivers, and protocol converters, while PPS maps USB and bridge signals to convenient pins. Operating from a 5V USB rail, the MCU needs no external regulators. Industrial temperature grade suits field-installed bridge boxes in factory automation.
推荐
Consumer White Goods Control
Washing machines, refrigerators, and HVAC controllers benefit from the PIC18F66K40T-I/PT's wide 2.3-5.5V supply (which interfaces directly with 5V relay drivers), 60 I/O for keypad/display/buzzer, and XLP low-power modes that comply with energy-star standby limits. The 10-bit ADC reads thermistors and humidity sensors, while PWM outputs drive triac-controlled AC loads through optocouplers. Industrial temperature range covers kitchen and laundry environments, and the large Flash accommodates user-interface firmware in multiple languages.
推荐
Portable Medical Device
Battery-powered medical monitoring devices leverage the PIC18F66K40T-I/PT's XLP technology for multi-year coin-cell operation. The 10-bit ADC digitizes signals from biomedical sensors (pulse oximetry, temperature), 60 I/O connect to small LCDs and keypads, and 64 KB Flash holds firmware with optional encryption for data security. The 5V tolerance simplifies direct connection to analog front-ends, and the industrial temp range covers clinical and home-use environments. PPS allows re-routing when the same PCB is reused across product variants.
推荐
HVAC Climate Controller
Climate controllers use the PIC18F66K40T-I/PT's multiple PWM channels to drive fan motors and proportional valves, while the 10-bit ADC reads thermistor temperature sensors. 60 I/O connect to display panels and rotary encoders, and the wide supply voltage simplifies integration with 24VAC-powered HVAC electronics after rectification. XLP deep-sleep modes cut standby power below energy-star thresholds. Core Independent Peripherals handle safety-critical timing (compressor minimum off-times) without CPU overhead.
推荐
推荐产品汇总
工程参考数据： PIC18F66K40T-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 | PIC18F66K40-I/PT | PIC18F66K40T-E/PTVAO | PIC18F66K40-E/PTVAO | PIC18F65K40-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-64 (10x10 mm) | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same |
| Flash Memory | 64 KB | 64 KB | 64 KB | 64 KB | 32 KB |
| SRAM | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB | 2 KB |
| Max CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Supply Voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V |
| I/O Pins | 60 | 60 | 60 | 60 | 50 |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +125C (Extended/Automotive) | -40C to +125C (Extended/Automotive) | -40C to +85C (Industrial) |
| Packaging Format | Tape & Reel | Tray | Tape & Reel | Tray | Tray |
| Unit Price (qty 1, USD) | 3.78 | 3.85 | 4.20 | 4.25 | 3.40 |
关键差异点
- Wider temperature range option for automotive （对比 PIC18F66K40T-I/PT)
- Higher I/O count than K40 sibling （对比 PIC18F65K40-I/PT)
- Reel packaging for SMT assembly （对比 PIC18F66K40-I/PT)
设计说明
Estimated: at 64 MHz active current with all peripherals off, the PIC18F66K40T-I/PT draws approximately 8-15 mA at 5V. For battery designs, leverage Sleep and Deep Sleep modes that drop current below 1 uA and below 100 nA respectively. Always place a 100 nF decoupling capacitor within 5 mm of each VDD/VDDCORE pin pair, and add a bulk 10 uF tantalum or ceramic near the supply input for transient stability.
TQFP-64 has 0.5 mm pitch leads; route with 0.15 mm traces and use micro-vias (0.2/0.4 mm) for inner-layer fanout. Keep the exposed thermal pad (if any) soldered to a copper pour on the top layer to improve heat dissipation; even though the 66K40 is low power, high I/O switching loads can produce localized heating. Avoid running noisy switching traces beneath the crystal traces to prevent jitter.
When migrating from PIC18F46K40 to PIC18F66K40T-I/PT, verify that unused I/O pins are configured as outputs (not floating inputs) to avoid parasitic current draw. Peripheral Pin Select (PPS) locks must be unlocked via PPSLOCK before remapping; failing to do so will silently block configuration writes. Also note that programming voltage on MCLR must be a clean 12V pulse during ICSP - capacitance on MCLR above 100 pF may interfere with programming.
合规信息
Standard I-grade industrial part is not AEC-Q100 qualified - choose E/PTVAO variants for automotive. RoHS and lead-free compliant per Microchip product page.
