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PIC16F1939-I/PT

8-bit PIC MCU, 32MHz, 28KB Flash, 1KB RAM, LCD driver, mTouch, TQFP-44

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Manufacturer Part：

PIC16F1939-I/PT

Package：

TQFP-44 (10.0 x 10.0 x 1.0 mm)

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Description

Product Overview

The PIC16F1939-I/PT is an 8-bit Flash microcontroller from Microchip Technology featuring the enhanced mid-range PIC core with 49 instructions and 16 stack levels. It offers 28KB Flash, 1KB RAM, and 256-byte EEPROM in a 44-pin TQFP package. The device includes an LCD driver, capacitive mTouch sensing, multiple PWM channels, and extensive communication interfaces.

Key Specifications

Core Enhanced PIC16 mid-range
Max Clock Frequency 32MHz
Flash Memory 28KB
RAM 1KB
Data EEPROM 256 bytes
I/O Pins 36
ADC 14-channel 10-bit
LCD Segments 96
Communication EUSART, MI2C, SPI
PWM 3 ECCP + 2 CCP
Supply Voltage 1.8V to 5.5V
Operating Temperature -40C to +85C
Package TQFP-44

Features

  • Enhanced mid-range core with 49 instructions and 16 stack levels
  • 96-segment LCD driver support
  • Integrated capacitive mTouch sensing module
  • Internal 32MHz oscillator (no external crystal needed)
  • 3 ECCP and 2 CCP modules for flexible PWM generation
  • 14-channel 10-bit ADC with voltage reference
  • 2 comparators with selectable voltage reference
  • nanoWatt XLP technology for ultra-low power

Applications

  • LCD display consumer products
  • Capacitive touch user interfaces
  • Industrial control and monitoring
  • Home automation systems
  • Battery-powered instruments

The PIC16F1939-I/PT from Microchip Technology is an enhanced mid-range 8-bit microcontroller in a 44-pin TQFP package. Featuring 28KB Flash, 1KB RAM, and 256-byte EEPROM, it integrates an LCD driver supporting up to 96 segments and a capacitive mTouch sensing module for touch interface design. The device operates up to 32MHz with an internal oscillator and offers rich peripherals including 3 ECCP and 2 CCP modules, 14-channel 10-bit ADC, EUSART, MI2C, and SPI interfaces. nanoWatt XLP technology ensures ultra-low power consumption.

The PIC16F1939-I/PT uses Microchip’s enhanced mid-range 8-bit architecture with 49 instructions and 16-level hardware stack. The CPU fetches and executes instructions from Flash memory, accessing RAM for data storage and EEPROM for non-volatile data retention. The LCD driver module generates segment and common drive signals for direct LCD glass connection. The mTouch module implements capacitive sensing using a charge-time measurement unit. Multiple timer/PWM modules generate precision timing and motor control signals. The ADC converts analog inputs using successive approximation. Communication peripherals handle serial data exchange via EUSART, SPI, and I2C protocols.

Pin Name Type Function
1 MCLR/VPP/RE3 Control Master clear / programming voltage
2 RA0/AN0/ULPWU/C12IN0- I/O Port A0 / ADC channel 0
3 RA1/AN1/C12IN1- I/O Port A1 / ADC channel 1
4 RA2/AN2/VREF-/C2IN+ I/O Port A2 / ADC VREF-
5 RA3/AN3/VREF+/C1IN+ I/O Port A3 / ADC VREF+
6-14 RA4-RA7/RB0-RB4 I/O General purpose I/O with alternate functions
15 RB5/AN11/TX/CK I/O EUSART transmit / clock
16 RB6/SCL/SCK I/O I2C clock / SPI clock
17 RB7/RX/DT/SDA/SDO I/O EUSART receive / I2C data / SPI out
18-43 RC-RE ports I/O General I/O with LCD, PWM, ADC functions
44 VDD Power Positive supply (1.8-5.5V)
  • LCD-based consumer products (thermostats, meters, scales)
  • Capacitive touch panel user interfaces
  • Industrial control and monitoring instruments
  • Home automation and smart home devices
  • Battery-powered handheld measurement tools
Manufacturer Part Number Package Notes
Microchip PIC16F1938-I/PT TQFP-44 16KB Flash version
Microchip PIC16F1939-E/P PDIP-40 Through-hole version
Microchip PIC18F45K22-I/PT TQFP-44 PIC18 upgrade, 32KB Flash
STMicroelectronics STM8S207M8T6 LQFP-48 8-bit alternative with LCD
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All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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