PIC16F1939T-I/PT - 8-Bit XLP MCU 32MHz 28KB Flash 44-TQFP | Microchip
料号： PIC16F1939T-I/PT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.92 | $4.92 |
| 10 | $4.45 | $44.50 |
| 100 | $3.95 | $395.00 |
| 500 | $3.58 | $1,790.00 |
| 1,000 | $3.25 | $3,250.00 |
PIC16F1939T-I/PT 概述
An 8-bit PIC microcontroller (MCU) is a single-chip computer based on Microchip's RISC-based PIC architecture, integrating CPU, Flash program memory, SRAM, EEPROM, peripherals (ADC, timers, PWM, communication interfaces), and I/O pins on a single CMOS die. Within the broader hierarchy, the PIC16F1939 belongs to the PIC16F family -> PIC microcontroller -> 8-bit MCU -> microcontroller -> embedded controller -> semiconductor IC. The 'F' suffix denotes Flash program memory; '19' indicates the enhanced mid-range core with nanoWatt XLP extreme low-power features.
Key features include the integrated LCD driver supporting up to 256 segments, 14-channel 10-bit ADC, multiple Enhanced Universal Synchronous/Asynchronous Receiver/Transmitter (EUSART), I2C, and SPI peripherals, plus 5 PWM modules. The nanoWatt XLP technology provides sleep currents as low as 9 nA typical, making it suitable for battery-powered applications requiring long operational life.
The 44-TQFP package variant (suffix /PT) offers 25 general-purpose I/O pins, while alternate package options include 28-pin SPDIP (/SP), 28-pin SOIC (/SO), 44-pin QFN (/MV), and 40-pin UQFN (/PT with -I/P, /PT). The /PT package is supplied in Tape & Reel format with standard 1,200-piece packaging.
Typical applications include handheld consumer devices with LCD displays, IoT sensor nodes, battery-powered metering, white goods and home appliance front panels, and industrial control panels. The integrated LCD driver eliminates external display controller ICs, reducing BOM cost in user-interface applications. The 1.8V minimum supply enables direct connection to single-cell battery sources including alkaline, NiMH, or lithium chemistries.
When designing with this device, ensure proper ICD/ICSP connection via the PGC/PGD pins for in-circuit debugging and programming. The wide supply voltage range simplifies designs that must accommodate battery voltage variation over discharge cycles without active temperature control.
直接替换替代料： PIC16F1939T-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： PIC16F1939T-I/PT （相同外形与封装尺寸） ——差异在于 ADC, I/O Pins, Timers, Package, LCD Driver.
快速对比工具——选择替代料号进行并排对比：
PIC16F1938T-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC16F1937T-I/PT
✅ 直接替换✓ 有现货
$2.55 / 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 →PIC16F1947T-I/PT
✅ 直接替换✓ 有现货
$3.16 / 个
查看数据手册 →PIC16F1939T-I/SO
✅ 直接替换📋 参考替代料（不在目录中）
PIC16F1939T-I/MV
✅ 直接替换📋 参考替代料（不在目录中）
PIC16F19186-I/PT
✅ 直接替换✓ 有现货
$1.82 / 个
查看数据手册 →PIC16F1939T-I/PT 最大额定值与电气特性
| Core | PIC 8-bit RISC |
| CPU Clock Speed | 32 MHz |
| Program Memory (Flash) | 28 KB (16K x 14) |
| RAM | 1 KB |
| EEPROM | 256 bytes |
| 电源电压 | 1.8 V to 5.5 V |
| I/O Pins | 25 |
| LCD Driver | Integrated (up to 256 segments) |
| ADC | 10-bit, 14-channel ADC |
| PWM Modules | 5 |
| Communication | EUSART, I2C, SPI |
| Timers | 5 (8-bit / 16-bit) |
| 封装 | 44-pin TQFP (10x10 mm) |
| 工作温度 | -40C to +85C (Industrial) |
| Technology | nanoWatt XLP (eXtreme Low Power) |
| 安装类型 | Surface Mount |
| MSL 等级 | 3 (per JEDEC J-STD-020) |
| RoHS 状态 | Compliant |
PIC16F1939T-I/PT 引脚配置
| 引脚 1 | RE3/MCLR — Digital input / Master Clear (reset) |
| 引脚 2 | RA0 — GPIO / analog input AN0 |
| 引脚 3 | RA1 — GPIO / analog input AN1 |
| 引脚 4 | RA2 — GPIO / analog input AN2 |
| 引脚 5 | RA3 — GPIO / analog input AN3 / Vref+ |
| 引脚 6 | RA4 — GPIO / analog input AN4 |
| 引脚 7 | RA5 — GPIO / analog input AN5 |
| 引脚 8 | RA6 — GPIO / analog input AN6 |
| 引脚 9 | RA7 — GPIO / analog input AN7 |
| 引脚 10 | VSS — Ground |
| 引脚 11 | VDD — Positive supply voltage |
| 引脚 12 | RB0 — GPIO / interrupt-on-change |
| 引脚 13 | RB1 — GPIO / interrupt-on-change |
| 引脚 14 | RB2 — GPIO / interrupt-on-change |
| 引脚 15 | RB3 — GPIO / interrupt-on-change |
| 引脚 16 | RB4 — GPIO / interrupt-on-change |
| 引脚 17 | RB5 — GPIO / interrupt-on-change / ICSP PGD |
| 引脚 18 | RB6 — GPIO / ICSP PGC |
| 引脚 19 | RB7 — GPIO / ICSP PGM |
| 引脚 20 | RC0 — GPIO / PWM |
| 引脚 21 | RC1 — GPIO / PWM |
| 引脚 22 | RC2 — GPIO / PWM |
| 引脚 23 | RC3 — GPIO / PWM / SCL |
| 引脚 24 | RC4 — GPIO / PWM / SDA |
| 引脚 25 | RC5 — GPIO / PWM |
| 引脚 26 | RC6 — GPIO / PWM / TX |
| 引脚 27 | RC7 — GPIO / PWM / RX |
| 引脚 28 | RE0 — GPIO |
| 引脚 29 | RE1 — GPIO |
| 引脚 30 | RE2 — GPIO |
| 引脚 31 | VDD — Positive supply voltage |
| 引脚 32 | VSS — Ground |
| 引脚 33 | RD0 — GPIO |
| 引脚 34 | RD1 — GPIO |
| 引脚 35 | RD2 — GPIO |
| 引脚 36 | RD3 — GPIO |
| 引脚 37 | RD4 — GPIO |
| 引脚 38 | RD5 — GPIO / PWM |
| 引脚 39 | RD6 — GPIO / PWM |
| 引脚 40 | RD7 — GPIO / PWM |
| 引脚 41 | SEG0 — LCD segment output |
| 引脚 42 | SEG1 — LCD segment output |
| 引脚 43 | SEG2 — LCD segment output |
| 引脚 44 | SEG3 — LCD segment output / OSC1 |
典型应用
PIC16F1939T-I/PT 适用于 6 应用s: Battery-Powered Metering with LCD Display, White Goods Front Panel User Interface, IoT Sensor Node with LCD, Industrial Control Panel with Segment Display, Handheld Consumer Device with LCD, Automotive Accessory Controller (Non-Safety).
Battery-Powered Metering with LCD Display
The PIC16F1939T-I/PT's integrated LCD driver (up to 256 segments), nanoWatt XLP technology (9 nA sleep current), and 1.8V to 5.5V supply range make it ideal for battery-powered metering applications. Placed as the main MCU, the device drives a segment LCD showing consumption data while sleeping between measurements, preserving battery life over multi-year deployments. Compared to MCUs requiring an external LCD controller, the built-in driver eliminates a companion IC and reduces BOM cost by $0.50-$1.00. Single-cell alkaline, lithium, or two AA batteries connect directly to VDD with no LDO required.
推荐
White Goods Front Panel User Interface
The PIC16F1939T-I/PT serves as the user-interface MCU in white goods (washing machines, dishwashers, refrigerators) where its integrated LCD driver, 25 I/O pins, and 5 PWM modules directly interface to mechanical switches, encoders, and indicator LEDs. The 32MHz clock supports responsive button-debounce routines and rapid LCD updates. The 44-TQFP industrial-grade (-40C to +85C) footprint withstands appliance thermal environments. Engineers typically connect 7-segment LCD displays, buzzer drivers, and rotary encoder inputs, with PWM controlling triac-driven motor or heater elements.
推荐
IoT Sensor Node with LCD
The PIC16F1939T-I/PT functions as the central MCU in IoT sensor nodes with local LCD readouts, where the integrated LCD driver eliminates a companion display controller and the nanoWatt XLP sleep current extends battery life. The 14-channel 10-bit ADC reads multiple sensor inputs (temperature, humidity, light, pressure) while EUSART or SPI communicates with a wireless module. The 1.8V minimum Vdd accepts direct single-AA or coin-cell battery operation, simplifying power tree design. Compared to MCUs without integrated LCD, the integrated driver saves PCB area and reduces firmware complexity.
推荐
Industrial Control Panel with Segment Display
The PIC16F1939T-I/PT is well-suited for industrial control panels where its industrial temperature grade (-40C to +85C), 44-TQFP surface-mount package, and integrated LCD driver support factory-floor operation. Engineers use it to drive 7-segment or 16-segment LCD glass displays showing process variables (temperature, pressure, flow rates) while accepting digital inputs from limit sensors. The 5 PWM outputs control proportional valves or indicator lamps, and the EUSART interfaces to RS-485 transceivers for factory networking. The 1.8V to 5.5V supply accepts 24V bus power with simple buck regulation.
推荐
Handheld Consumer Device with LCD
The PIC16F1939T-I/PT's combination of low power, integrated LCD, and 32MHz performance makes it ideal for handheld consumer devices such as remote controls, digital thermometers, kitchen scales, and personal health monitors. The 28KB Flash accommodates feature-rich firmware with multiple modes and LCD menus, while 1KB RAM supports real-time display buffering. The compact 44-TQFP (10x10 mm) footprint fits into small enclosures, and the 1.8V minimum supply enables single-CR2032 or 2xAAA battery operation with measured sleep currents around 9 nA typical per Microchip datasheet DS41578.
推荐
Automotive Accessory Controller (Non-Safety)
The PIC16F1939T-I/PT functions as an accessory controller in non-safety automotive applications (interior lighting, climate displays, accessory gauges) where its LCD driver, 25 I/O, and industrial temperature range fit dashboard cluster requirements. Note: this variant is NOT AEC-Q100 qualified - for safety-critical or under-hood use, select automotive-qualified PIC16F1939 equivalents or migrate to PIC16F1939-E/PT extended-temperature variants. The wide supply range tolerates 12V vehicle bus voltage with appropriate regulation, supporting body-electronics modules with segment LCD readouts.
推荐
推荐产品汇总
工程参考数据： PIC16F1939T-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 | PIC16F1938T-I/PT | PIC16F1937T-I/PT | PIC16F1939-I/PT | PIC16F1947T-I/PT | PIC16F19186-I/PT |
|---|---|---|---|---|---|---|
| Package | 44-TQFP (10x10) | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | |
| Flash Memory | 28 KB (16K x 14) | 16 KB (-43%) | 8 KB (-71%) | 28 KB (same) | 28 KB (same) | |
| RAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | |
| CPU Clock Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | |
| Supply Voltage | 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 | 1.8 V to 5.5 V | |
| LCD Driver | Yes (256 segments) | Yes (256 segments) | Yes (256 segments) | Yes (384 segments) | Yes | |
| I/O Pins | 25 | 25 | 25 | 36 | 36 |
关键差异点
- Highest memory variant with integrated LCD driver in PIC16F193x family （对比 PIC16F1938T-I/PT)
- Drop-in upgrade option with extended peripherals and more pins （对比 PIC16F1947T-I/PT)
- nanoWatt XLP extreme low-power technology （对比 PIC16F19186-I/PT)
设计说明
Decouple VDD with 100nF + 10uF ceramic capacitors placed within 5mm of each VDD/VSS pair. The PIC16F1939T-I/PT has multiple VDD pins (11, 31) and VSS pins (10, 32) on the 44-TQFP; both pairs must be decoupled separately to prevent digital switching noise from coupling into analog sections. Estimated: total bulk capacitance of 20uF across both VDD rails suffices for typical 32MHz operation with PWM switching loads up to 20mA peak.
Route the ICSP signals (PGC/PGD on RB6/RB7, MCLR on RE3) to a 6-pin 0.1-inch header for in-circuit serial programming and debugging. Add a 10kohm pull-up to VDD on MCLR (RE3) per Microchip recommendation, plus a 100nF capacitor to ground for ESD protection. Keep PGC/PGD traces short (< 50mm) and isolated from switching power traces to ensure reliable programming with the PICkit 3/4 or ICD 4.
Do not configure RE3/MCLR as a digital GPIO in your application code unless you have disabled the MCLR function via the CONFIG register. RE3 is an input-only pin when MCLR is enabled, and floating RE3 can cause spurious resets. Use the internal weak pull-up or external 10kohm pull-up on RE3. Also ensure LCD segment pins are not driven as outputs when LCDCON is active - shared pin functions require careful configuration per the PPS (Peripheral Pin Select) registers.
The 44-TQFP package has theta_JA of approximately 50-60 C/W on a standard JEDEC 4-layer PCB. At maximum 32MHz operation with all peripherals active, the device dissipates approximately 30-50mW (estimated: VDD=5V, IDD_active=10mA), giving a junction-to-ambient temperature rise of 2-3 C/W. No heatsink required for typical applications. For extended-temperature environments, ensure PCB copper area on VDD/VSS pins keeps junction temperature below 85C industrial grade.
When using the 32MHz internal oscillator with 4x PLL, place the PIC16F1939T-I/PT away from high-current switching traces to minimize EMI coupling into the analog ADC inputs. The 10-bit ADC achieves best accuracy with source impedance below 2.5kohm and adequate acquisition time (minimum 5us). Add a 100nF bypass capacitor on each ANx analog input pin used for ADC measurements to filter high-frequency noise.
合规信息
RoHS and REACH compliant per Microchip product page. Industrial temperature grade -40C to +85C. Not AEC-Q100 qualified - not recommended for safety-critical automotive applications.