PIC16F1939-I

8-bit PIC MCU, 28KB Flash, 1KB RAM, 32MHz, LCD controller, mTouch, XLP

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Manufacturer Part：

PIC16F1939-I

Package：

40-pin PDIP / 44-pin QFN (8x8 mm)

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Description

Product Overview

The PIC16F1939-I is a 40-pin, 8-bit Flash-based CMOS microcontroller from Microchip Technology, featuring the enhanced Mid-Range core with 49 instructions and 16-level deep hardware stack. With 28KB of Flash program memory, 1024 bytes of RAM, and 256 bytes of data EEPROM, this MCU operates at up to 32 MHz (8 MIPS) across a wide voltage range of 1.8V to 5.5V. It integrates an LCD controller supporting up to 96 segments, a capacitive mTouch sensing module with 16 channels, and a rich set of analog and digital peripherals including a 14-channel 10-bit ADC, two comparators, three ECCP modules, two CCP modules, EUSART, and MSSP (SPI/I2C). Part of Microchip’s eXtreme Low-Power (XLP) family with nanoWatt technology, it is ideal for LCD-based applications, home automation, industrial control, and consumer electronics requiring touch sensing and display capabilities.

Key Specifications

Core Architecture 8-bit PIC (Enhanced Mid-Range)
Program Memory 28KB Flash (16K x 14 words)
RAM 1024 bytes
Data EEPROM 256 bytes
Maximum Speed 32 MHz (8 MIPS)
Operating Voltage 1.8V to 5.5V
I/O Pins 36
ADC 10-bit, 14 channels
Comparators 2
Timers 4 x 8-bit (TMR0/2/4/6) + 1 x 16-bit (TMR1)
PWM 3 x ECCP + 2 x CCP
Communication EUSART, SPI, I2C (MSSP)
LCD Controller Up to 96 segments
Capacitive Sensing mTouch, 16 channels
Operating Temperature -40°C to +85°C (Industrial)
Package 40-pin PDIP / 44-pin QFN / 44-pin TQFP

Features

  • Enhanced Mid-Range core with 49 single-cycle instructions and 16-level deep hardware stack
  • Integrated LCD driver supporting up to 96 segments with contrast control
  • Capacitive mTouch sensing module with up to 16 selectable channels
  • Precision internal oscillator (32 MHz) factory calibrated to ±1%
  • 14-channel 10-bit ADC with selectable voltage reference (1.024V/2.048V/4.096V)
  • Three Enhanced CCP (ECCP) modules with PWM steering and dead-band control
  • Two standard CCP modules for capture/compare/PWM
  • EUSART with auto-baud detect, supporting RS-232/RS-485/LIN
  • MSSP module with SPI and I2C (SMBus/PMBus compatible)
  • eXtreme Low-Power (XLP) technology: 60 nA standby current
  • Integrated temperature indicator module
  • In-Circuit Serial Programming (ICSP) and integrated debug support

Applications

  • LCD display panels and metering systems
  • Home automation and smart appliances
  • Capacitive touch interfaces and keypads
  • Industrial control and sensor monitoring
  • Consumer electronics with display requirements
  • Battery-powered portable devices
  • Automotive dashboard and control modules

The PIC16F1939 is a 40/44-pin Flash-based 8-bit CMOS microcontroller from Microchip Technology, featuring the enhanced Mid-Range core architecture. It offers 28KB of self-read/write Flash program memory, 1024 bytes of data SRAM, and 256 bytes of data EEPROM. Operating at up to 32 MHz with an 8 MIPS throughput, this device includes an integrated LCD controller capable of driving up to 96 segments, making it ideal for display applications. The built-in mTouch capacitive sensing module with 16 channels enables touch-based user interfaces without external components. With its eXtreme Low-Power (XLP) technology featuring nanoWatt power management, the PIC16F1939 is well-suited for battery-powered applications. The rich peripheral set includes a 14-channel 10-bit ADC, two analog comparators, three enhanced CCP modules, two standard CCP modules, EUSART with LIN support, and MSSP (SPI/I2C). Industrial temperature range (-40°C to +85°C) and wide operating voltage (1.8V-5.5V) ensure reliability across diverse application environments.

The PIC16F1939 operates on an enhanced Mid-Range RISC core with 49 instructions, most executing in a single clock cycle. Program execution is managed by a 13-bit program counter with a 16-level deep hardware stack for subroutine calls. The core accesses Flash program memory (14-bit wide instructions) and SRAM data memory (8-bit wide) via separate buses, enabling Harvard architecture parallel access. The LCD controller module generates segment and common driver signals for up to 96 LCD segments, with programmable contrast via internal voltage reference. The mTouch capacitive sensing module measures capacitance changes on dedicated pins to detect touch events. The 10-bit ADC converts analog signals from up to 14 channels using a successive approximation register (SAR) architecture. Timer modules provide timing, counting, and PWM generation, with ECCP modules offering enhanced PWM features like steering, dead-band control, and auto-shutdown. Communication peripherals (EUSART, MSSP) handle serial data transfer with hardware-assisted protocol handling. Power management features include multiple sleep modes, brown-out reset, and watchdog timer for reliable operation.

Pin (PDIP-40) Name Type Function
1 MCLR/VPP/RE3 I/P Master Clear / Programming Voltage / Digital Input
2 RA0/AN0/C12IN0-/SEG12 I/O Port A I/O / ADC Input / Comparator Input / LCD Segment
3 RA1/AN1/C12IN1-/SEG13 I/O Port A I/O / ADC Input / Comparator Input / LCD Segment
4 RA2/AN2/C12IN2-/SEG14 I/O Port A I/O / ADC Input / Comparator Input / LCD Segment
5 RA3/AN3/C12IN3-/SEG15 I/O Port A I/O / ADC Input / Comparator Input / LCD Segment
6 RA4/T0CKI/C1OUT/SEG16 I/O Port A I/O / Timer0 Clock / Comparator1 Output / LCD Segment
7 RA5/AN4/C2OUT/SRQ/SEG17 I/O Port A I/O / ADC Input / Comparator2 Output / SR Latch Output
8 RE0/AN5/CK1SPL/SEG18 I/O Port E I/O / ADC Input / LCD Segment
9 RE1/AN6/SEG19 I/O Port E I/O / ADC Input / LCD Segment
10 RE2/AN7/SEG20 I/O Port E I/O / ADC Input / LCD Segment
11 VDD P Positive Supply Voltage
12 VSS P Ground Reference
13 RA7/OSC1/CLKIN/SEG7 I/O Port A I/O / Oscillator Input / Clock Input / LCD Segment
14 RA6/OSC2/CLKOUT/SEG6 I/O Port A I/O / Oscillator Output / Clock Output / LCD Segment
15 RC0/T1OSO/T13CKI/SEG0 I/O Port C I/O / Timer1 Oscillator / Timer1 Clock / LCD Segment
16 RC1/T1OSI/CCP2/SEG1 I/O Port C I/O / Timer1 Oscillator / CCP2 / LCD Segment
17 RC2/CCP1/SEG2 I/O Port C I/O / CCP1 / LCD Segment
18 RC3/SCK/SCL/SEG3 I/O Port C I/O / SPI Clock / I2C Clock / LCD Segment
19 RC4/SDI/SDA/SEG4 I/O Port C I/O / SPI Data In / I2C Data / LCD Segment
20 RC5/SDO/SEG5 I/O Port C I/O / SPI Data Out / LCD Segment
21 RC6/TX/CK/SEG9 I/O Port C I/O / EUSART TX / LCD Segment
22 RC7/RX/DT/SEG8 I/O Port C I/O / EUSART RX / LCD Segment
23 RC4/SDI/SDA/SEG4 I/O Port C I/O / Alternate Function
24 RB0/INT/SEG24 I/O Port B I/O / External Interrupt / LCD Segment
25 RB1/SEG25 I/O Port B I/O / LCD Segment
26 RB2/SEG26 I/O Port B I/O / LCD Segment
27 RB3/SEG27 I/O Port B I/O / LCD Segment
28 RB4/SEG28 I/O Port B I/O / LCD Segment
29 RB5/SEG29 I/O Port B I/O / LCD Segment
30 RB6/ICSPCLK/SEG30 I/O Port B I/O / ICSP Clock / LCD Segment
31 RB7/ICSPDAT/SEG31 I/O Port B I/O / ICSP Data / LCD Segment
32 VSS P Ground Reference
33 VDD P Positive Supply Voltage
34 RB0/INT/SEG24 I/O Alternate Port B I/O
35 RC0/T1OSO/T13CKI/SEG0 I/O Alternate Port C I/O
36 RC1/T1OSI/CCP2/SEG1 I/O Alternate Port C I/O
37 RC2/CCP1/SEG2 I/O Alternate Port C I/O
38 RC3/SCK/SCL/SEG3 I/O Alternate Port C I/O
39 RC4/SDI/SDA/SEG4 I/O Alternate Port C I/O
40 RC5/SDO/SEG5 I/O Alternate Port C I/O
  • LCD-based metering and display systems (utility meters, thermostats)
  • Home automation and smart home control panels
  • Capacitive touch keypads and human-machine interfaces
  • Industrial sensor monitors and data loggers
  • Consumer electronics with display and touch requirements
  • Battery-powered portable medical devices
  • Automotive dashboard controllers and interior lighting
Manufacturer Part Number Package Notes
Microchip PIC16F1938-I 28-pin 28-pin variant, 11-channel ADC
Microchip PIC16LF1939-I 40/44-pin Low-voltage variant (1.8V-3.6V)
Microchip PIC16F1937-I 28-pin 8KB Flash, 28-pin, LCD
Microchip PIC16F1947-I 64/80-pin 28KB Flash, larger LCD (196 seg)
Microchip PIC16F1789-I 40/44-pin 28KB Flash, advanced analog
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Quality Assurance

Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

1. Authorized & Genuine Sourcing Promise

All of our electronic components are procured from official authorized distributors and original manufacturers. We strictly reject counterfeits, refurbished parts, disassembled components and gray-market goods. Every product is guaranteed to be brand-new original parts and fully consistent with the original technical parameters. For branded products such as NXP IC series, we maintain complete supply channel documents to realize full product traceability.

2. Strict Full-batch Quality Inspection

We implement 100% full-batch quality control for all goods before shipment. Our professional QC team conducts multi-dimensional tests including appearance inspection, electrical parameter testing, performance verification and packaging check. Each batch of components is attached with complete inspection reports and batch records. We stick to zero-tolerance standards for defective products to ensure every piece of component meets industrial application requirements.

3. Industry Standard Compliance

Our products comply with a variety of international industry quality standards to adapt to high-standard application scenarios:
  • Automotive Electronics: All automotive-grade components pass AEC-Q series certification, featuring excellent stability and durability to adapt to complex vehicle operating environments.
  • Medical Devices: High-reliability components meet medical industry safety and compliance regulations, ensuring stable operation for medical equipment.
  • Industrial Control & Consumer Electronics: Products conform to universal international electronic industry standards, suitable for long-term continuous operation of various equipment.

4. Professional Reliability Control

For static-sensitive, moisture-sensitive and precision components such as ICs, PCBs, sensors and connectors, we carry out reliability screening in advance. Combined with standardized ESD anti-static packaging and vacuum moisture-proof packaging, we avoid component damage caused by static electricity, dampness or collision during storage and transportation, and retain the original performance of products.

5. Traceability Management System

We establish a complete product traceability system. Each batch of goods corresponds to independent batch number, sourcing record, inspection record and delivery record. Customers can query the whole lifecycle information of components at any time. This system effectively solves quality risks and facilitates after-sales handling and production quality control for your company.

6. After-sales Quality Guarantee

If any product is confirmed to have non-conformity quality problems due to our reasons after receipt, we provide free return, exchange and supplementary delivery services. Our professional quality team will also conduct root cause analysis to optimize our quality control process. We respond to quality feedback within 24 hours to resolve your worries efficiently.

Contact Us

If you have inquiries about our quality standards, inspection procedures or product certification documents, please feel free to contact us:

 

Email: info@ic-vendor.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

Shipping & Payment

Materialparts is a professional global supplier of electronic components with over 20 years of industry experience. We provide one-stop supply of passive components, integrated circuits, as well as parts for industrial control, automotive electronics, consumer electronics and medical devices. Below are the unified shipping and payment policies applicable to all orders, samples and bulk purchases worldwide.

1. Payment Terms

We offer a variety of secure and convenient payment methods to meet diverse business cooperation needs. Details are as follows:
  1. Accepted Payment Methods
  • T/T (Bank Wire Transfer): The primary settlement method for bulk orders and a widely used international payment channel.
  • PayPal: Ideal for small orders, sample orders and quick payments.

  1. Settlement Currency

     

    US Dollar (USD) is the default settlement currency. RMB is available for domestic customers.

  2. Bank Charges

     

    All transfer fees, intermediary bank charges and other remittance-related expenses shall be borne by the buyer.

  3. Payment Requirements
  • Sample and small orders: Shipment will be arranged upon full payment.
  • In-stock bulk orders: Goods will be delivered within 2 to 3 working days after full payment.

2. Shipping & Delivery

We partner with leading global logistics providers to ensure safe and fast delivery worldwide. Relevant details are listed below:
  1. Logistics Partners
  • International Express: DHL, FedEx, UPS, TNT
  • Economy Logistics: Air freight and sea freight for large-volume cargo
  • Domestic Delivery: SF Express, Yunda Express
  1. Order Processing Time
  • In-stock items: Orders confirmed and fully paid before 14:00 (GMT+8) will be shipped on the same day. All other orders will be dispatched within 1 to 2 working days.
  • Out-of-stock or sourced items: The delivery lead time will be confirmed separately according to brand and inventory status.
  1. Estimated Transit Time
  • International Express: 3 – 7 working days globally
  • Air Freight: 7 – 12 working days
  • Sea Freight: 25 – 40 working days for heavy and large bulk cargo
  1. Shipping Fee Rules
  • Shipping cost is calculated based on package weight, volume, destination and delivery method.
  • Both freight prepaid and freight collect are available. Please provide your courier account number in advance if you choose freight collect.
  • Free international express delivery is offered for large orders. Terms for long-term partners can be negotiated separately.
  1. Shipment Tracking
     

    Within 24 hours after dispatch, we will send the tracking number, commercial invoice, packing list and other documents to your email or communication account. You may check the shipment status online in real time.

3. General Order Rules & Notes

  1. MOQ & Sample Service

     

    We support flexible minimum order quantities for samples, small-batch and large-batch orders. All sample orders shall comply with the above shipping and payment policies.

  2. Packaging Standard

     

    All electronic components are packed with professional anti-static and shockproof materials. Original factory packaging is available for branded chips and integrated circuits.

4. Customs & Liability Statement

  1. Import Duties & Taxes

     

    All import duties, customs clearance fees and local taxes incurred for international shipments shall be borne by the buyer. We will provide complete customs documents to assist you with clearance procedures.

  2. Handling of Lost or Damaged Goods
  • In case of loss or severe damage during transit, please contact us within 48 hours after receiving the tracking information. We will assist you in filing a claim with the logistics provider.
  • We shall not be liable for any losses caused by incorrect delivery address, wrong contact information or the buyer’s refusal to complete customs clearance.

5. Local Pickup in Shenzhen

Local pickup service is available for customers in Shenzhen and surrounding areas:
  • Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong Province, China
  • Business Hours: 09:00 – 18:00, Monday to Friday. Closed on weekends and official public holidays.
  • Notice: Please make an appointment via email or communication tools one day in advance, and present your order information upon pickup.

Contact Information

Email: info@ic-vendor.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

Core Services

1. One-stop Sourcing & BOM Support

We specialize in a full range of passive and active electronic components, including SMD resistors, power resistors, connectors, aviation connectors, LED beads, flexible circuit boards, printed circuit boards, and integrated circuits. Our professional team provides BOM list consolidation, component matching, and alternative model recommendation services. We support sample orders, small-batch trial production, and mass production orders with flexible MOQs to meet diverse procurement needs.

2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

3. Fast Quotation & Order Processing

Our customer service team responds promptly to inquiries and quotation requests. All in-stock orders will be processed within one working day. We provide stocking reservation services for long-term cooperative customers, effectively solving problems such as component shortages and unstable supply chains.

4. Professional Technical Support

Our senior engineer team provides free technical consultation, model selection guidance and original manufacturer datasheets. We assist customers in solving problems related to product R&D, circuit design and component application, providing reliable technical support for project progress.

5. Sourcing for Special Components

Relying on our global supply chain network, we professionally source scarce components, obsolete parts and customized special components to efficiently solve your procurement difficulties.

6. Global Logistics & Document Services

We cooperate with mainstream international logistics providers including DHL, FedEx, UPS and TNT to achieve fast global delivery. We can provide complete export documents such as customs declaration files, commercial invoices and packing lists to ensure smooth customs clearance for international shipments. Local pickup is also available for customers in Shenzhen, China.

Professional Packaging Standards

Electronic components are sensitive to static electricity, collision, moisture and dust. We adopt industry-standard anti-static packaging solutions to fully ensure the integrity of goods during transportation and storage.

1. General Packaging Specifications

  • All components are packed separately to avoid damage caused by friction and collision;
  • Shockproof buffer materials are added for fragile products to ensure transportation safety;
  • Each package is clearly marked with part number, quantity, batch number and specifications for easy inventory counting and management.

2. Classified Professional Packaging

  • Anti-static Packaging: Static-sensitive components such as chips, circuit boards and sensors are packaged with anti-static bags, shielding boxes and conductive foam in strict accordance with international anti-static standards to prevent static damage.
  • Vacuum Moisture-proof Packaging: Moisture-sensitive components are vacuum-sealed with desiccants to isolate humid air, suitable for ocean transportation and long-term storage.
  • Original Factory Packaging: Integrated circuits of brands such as NXP are delivered with original reels, trays or tubes by default, retaining complete original packaging and adapting to automated SMT production lines.
  • Discrete Device Packaging: Discrete devices such as SMD resistors, power resistors and LEDs are quantitatively and classifiedly packaged with accurate quantity and clear marking.
  • Connector / Aviation Connector Packaging: Hard outer packaging is adopted to prevent pin bending and structural deformation.

3. Custom Packaging Services

We provide value-added services including personalized packaging, custom labeling and re-reeling according to customer requirements, fully matching your production and warehouse management standards.

Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@ic-vendor.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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