PIC16LF1939T-I/PT - 28KB Flash XLP 8-bit MCU 44-TQFP | Microchip
料号： PIC16LF1939T-I/PT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.37 | $3.37 |
| 10 | $2.94 | $29.40 |
| 100 | $2.41 | $241.00 |
| 500 | $1.98 | $990.00 |
| 1,000 | $1.78 | $1,780.00 |
PIC16LF1939T-I/PT 概述
What is a microcontroller (MCU)? A microcontroller is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), data memory (RAM), non-volatile storage (EEPROM), and a rich set of peripherals such as timers, ADC/DAC, communication interfaces (UART, SPI, I2C), and GPIO onto one die. The PIC16LF1939 belongs to the PIC16 family of 8-bit microcontrollers, which sit within Microchip's 8-bit MCU portfolio alongside PIC10/12/14/18 families, and ultimately within the broader microcontroller -> embedded IC -> semiconductor hierarchy. The XLP designation indicates an ultra-low-power architecture optimized for battery-powered and energy-harvesting designs.
Key features include up to 32 MHz internal oscillator, 10-bit ADC with multiple channels, hardware capacitive touch sensing (mTouch) via the on-chip Charge Time Measurement Unit (CTMU), multiple Enhanced Universal Synchronous/Asynchronous Receiver/Transmitters (EUSART), SPI, and I2C interfaces. The wide 1.8V-5.5V operating range allows direct connection to single-cell Li-ion or two-cell AA battery stacks without external level shifters.
The PIC16LF1939 uses Microchip's enhanced mid-range 8-bit RISC core with a 14-bit instruction word, providing deterministic interrupt latency and single-cycle hardware multiply support in the instruction set. The integrated nanoWatt XLP technology delivers sleep currents in the sub-1uA range, enabling years of operation on a single coin cell. On-chip peripherals include 5 CCP/ECCP modules, comparators, and a configurable logic cell (CLC) for custom digital glue logic.
Typical applications include low-power IoT sensor nodes, battery-powered consumer electronics, capacitive touch user interfaces (keypads, sliders, proximity sensors), home appliances, automotive body electronics (non-safety), industrial control panels, and USB/HID human interface devices when paired with an external USB transceiver. The combination of high Flash density, generous I/O count, and XLP power profile also makes it a strong fit for wearable medical monitoring and portable instrumentation.
Design tip: Always place a 0.1uF decoupling capacitor as close as possible to each VDD pin, with a bulk 10uF capacitor on the main supply rail. For capacitive touch applications, follow Microchip's mTouch PCB layout guidelines for sensor electrode sizing, ground flooding, and guard-ring placement to maximize touch sensitivity and noise immunity.
This page synthesizes distributor pricing, drop-in alternatives from the same PIC16LF1939 family, application-specific design guidance, and parametric comparisons not aggregated in the manufacturer datasheet alone.
直接替换替代料： PIC16LF1939T-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： PIC16LF1939T-I/PT （相同外形与封装尺寸） ——差异在于 Package, Core Architecture, ADC, Operating Temperature, Communication.
快速对比工具——选择替代料号进行并排对比：
PIC16LF1939-I/PT
✅ 直接替换✓ 有现货
$1.52 / 个
查看数据手册 →PIC16LF1939T-I/ML
✅ 直接替换✓ 有现货
$2.62 / 个
查看数据手册 →PIC16LF1939-I/ML
✅ 直接替换✓ 有现货
$3.98 / 个
查看数据手册 →PIC16LF1939-E/PT
✅ 直接替换✓ 有现货
$2.62 / 个
查看数据手册 →PIC16F1939-I/PT
✅ 直接替换✓ 有现货
$3.42 / 个
查看数据手册 →PIC16LF1937T-I/PT
✅ 直接替换✓ 有现货
$1.84 / 个
查看数据手册 →PIC16LF1939T-I/PT 最大额定值与电气特性
| Core Architecture | 8-bit PIC16 Enhanced Mid-Range RISC |
| Instruction Word | 14-bit |
| Program Memory (Flash) | 28 KB (16K x 14 words) |
| Data SRAM | 1 KB |
| Data EEPROM | 256 bytes |
| Maximum CPU Speed | 32 MHz |
| Operating Voltage Range | 1.8 V to 5.5 V |
| I/O Pins | 36 |
| ADC | 10-bit, multiple channels |
| 封装 | 44-pin TQFP (10x10 mm) |
| 安装类型 | Surface Mount |
| 工作温度 | -40C to +85C (Industrial) |
| Low-Power Family | XLP (nanoWatt) |
| RoHS 状态 | Compliant |
| Communication Interfaces | EUSART, SPI, I2C |
PIC16LF1939T-I/PT 44-pin tqfp (10x10 mm) 引脚配置指南
PIC16LF1939T-I/PT（44-pin tqfp (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： PIC16LF1939T-I/PT.
请参阅 数据手册 以查看完整引脚配置。
典型应用
PIC16LF1939T-I/PT 适用于 7 应用s: Low-Power IoT Sensor Nodes, Capacitive Touch User Interfaces, Battery-Powered Consumer Electronics, Home Appliance Control Boards, Industrial Control Panels and HMI, Automotive Body Electronics (Non-Safety), Portable Medical Monitoring Devices.
Low-Power IoT Sensor Nodes
The PIC16LF1939T-I/PT's 28KB Flash, 1KB RAM, and nanoWatt XLP sleep current below 1 uA make it well-suited for battery-powered IoT sensor nodes operating from a single CR2032 coin cell for 2-5 years. The integrated 10-bit ADC with multiple channels reads temperature, humidity, and battery voltage without external components, while the EUSART/SPI/I2C interfaces connect to radios such as sub-GHz transceivers. Its 1.8V-3.3V operation eliminates the need for a boost converter when running from depleted cells down to 2.0V.
推荐
Capacitive Touch User Interfaces
The PIC16LF1939T-I/PT integrates Microchip's Charge Time Measurement Unit (CTMU) and mTouch peripheral library support for capacitive touch buttons, sliders, and proximity sensors. The 36 I/O pins support up to 28 touch channels when configured as analog, with hardware-accelerated measurement reducing CPU load to single-digit percent. The 32 MHz core processes up to 100 touches per second while keeping total system current under 5 mA at 3.3V, ideal for appliances and consumer products requiring reliable touch response under noisy conditions.
推荐
Battery-Powered Consumer Electronics
Portable consumer devices such as remote controls, fitness wearables, and electronic toys benefit from the PIC16LF1939T-I/PT's wide 1.8V-5.5V supply range and XLP sleep modes (Doze, Idle, Sleep with RTCC). The 28KB Flash stores full USB HID stacks, custom graphics libraries, or multi-language UI tables. The internal 32 MHz oscillator eliminates an external crystal, saving PCB area, while the 256B EEPROM stores user preferences and calibration data for >1M write cycles.
推荐
Home Appliance Control Boards
White-goods control boards (washing machines, dishwashers, refrigerators, microwave ovens) rely on the PIC16LF1939T-I/PT's 36 I/O count and rich peripheral set including 5 CCP/ECCP modules for motor control and PWM-driven valve/relay drivers. The 10-bit ADC reads sensor inputs (temperature, water level, motor current) while EUSART provides diagnostic UART connectivity. Industrial-grade -40C to +85C operation covers appliance environments; the E/PT grade is recommended for ovens and refrigerators reaching +125C interior zones.
推荐
Industrial Control Panels and HMI
Industrial HMI panels use the PIC16LF1939T-I/PT to drive character or small graphic LCDs via the on-chip LCD controller peripheral (up to 96 segments), handle keypad input, and communicate over RS-485/MODBUS via EUSART. The 28KB Flash accommodates multi-page menu structures, language strings, and parameter logging routines. Hardware CLC (Configurable Logic Cell) implements custom glue logic for fault detection and interlocks without external gates, reducing BOM cost and PCB area.
推荐
Automotive Body Electronics (Non-Safety)
Body-control modules, interior lighting controllers, HVAC panels, and accessory switches use the PIC16LF1939T-I/PT for LIN-bus communication via the EUSART with LIN hardware support, seat/mirror position memory in EEPROM, and PWM driving of LED arrays. The 32 MHz core handles LIN 2.x protocol stacks and diagnostic routines. Note: For safety-critical automotive applications, choose a part with explicit AEC-Q100 qualification - the PIC16LF1939 family does not carry that designation but is widely used in non-safety body modules.
推荐
Portable Medical Monitoring Devices
Wearable medical devices such as pulse oximeters, glucose meters, and activity trackers leverage the PIC16LF1939T-I/PT's low sleep current (sub-1uA) to extend battery life beyond one year on a single CR2032. The 10-bit ADC with internal voltage reference reads pulse oximeter photodiode signals with adequate resolution for SpO2 calculation, while 1KB RAM holds moving-average buffers and trend arrays. The 256B EEPROM stores patient calibration data and measurement history.
推荐
推荐产品汇总
工程参考数据： PIC16LF1939T-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 | PIC16LF1939-I/PT | PIC16LF1939T-I/ML | PIC16LF1939-E/PT | PIC16F1939-I/PT | PIC16LF1937T-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-QFN (8x8 mm) - different footprint | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same |
| Flash Memory | 28 KB (16K x 14) | 28 KB | 28 KB | 28 KB | 28 KB | 14 KB (-50%) |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Operating Voltage | 1.8 V to 5.5 V (LF) | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V (F) | 1.8 V to 5.5 V |
| Max CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Temperature Range | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +125C (Extended) | -40C to +85C | -40C to +85C |
| Packaging Format | Tape & Reel (/T) | Tube (no /T) | Tape & Reel, QFN | Tube | Tube | Tape & Reel |
关键差异点
- Tape and reel packaging for high-volume automated assembly （对比 PIC16LF1939-I/PT)
- Extended temperature grade available in same package （对比 PIC16LF1939-E/PT)
- 28KB Flash for feature-rich firmware （对比 PIC16LF1937T-I/PT)
- Low-voltage LF variant for battery-optimized designs （对比 PIC16F1939-I/PT)
设计说明
Estimated: At 32 MHz active current is approximately 5.2 mA at 3.3V (17 mW); in Sleep mode with RTCC running the LF variant drops to under 1 uA typical. For coin-cell designs, duty-cycle the MCU aggressively: wake on interrupt, take ADC reading, transmit, and return to sleep. This pattern typically achieves <50 uA average current from a CR2032 cell, yielding 3-5 year battery life.
Place a 0.1uF ceramic decoupling capacitor within 3 mm of each VDD pin, plus a single 10uF bulk capacitor on the main supply rail. For 44-TQFP designs with multiple VDD/VSS pairs, use a via-stitched ground pour under the IC and route sensitive analog signals (ADC, VREF+) away from digital switching traces and clock lines to minimize coupled noise.
Do not omit the MCLR pull-up resistor (typically 10k) if you use the internal oscillator and do not need external reset; floating MCLR can cause spurious resets. When using ICSP (In-Circuit Serial Programming), isolate the PGC/PGD lines from high-impedance analog nets and add series resistors to limit inrush current during programming.
For capacitive touch sensing with the CTMU, follow Microchip mTouch layout guidelines: surround touch sensors with a hatched ground fill (active guard), maintain 0.5 mm minimum gap between adjacent electrodes, and place a 0.5-2 pF Cs sample capacitor on the ADC channel. Avoid ground-plane flooding directly under touch electrodes to prevent parasitic capacitance that desensitizes touch response.
合规信息
RoHS and REACH compliant per Microchip product page and distributor listings. Halogen-free per Microchip environmental compliance documentation. Not AEC-Q100 qualified - this family is widely used in non-safety automotive body electronics but safety-critical applications require AEC-Q100-qualified MCUs.