STC15L408AD

Low-voltage 1T 8051 MCU, 2.4-3.6V, 30MHz, 8KB Flash, 10-bit 8-ch ADC, SPI/UART/PWM, low power

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Manufacturer Part：

STC15L408AD

Package：

SOP-16 / DIP-16 / SOP-20 / TSSOP-20

Brand：
Product Categories：

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Service & Packaging
Product Manual
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Description

Product Overview

The STC15L408AD is a low-voltage 8051-based microcontroller from STC Micro, part of the STC15 series featuring an enhanced 1T core architecture. The ‘L’ designation indicates low-voltage operation from 2.4V to 3.6V, making it ideal for battery-powered and low-power applications. With 8KB of Flash program memory, 10-bit ADC, and rich peripheral set including UART, SPI, I2C, PWM/PCA, and multiple timers, this MCU provides excellent performance at very low power consumption levels.

Key Specifications

Manufacturer STC Micro (Hongjing Technology)
Product Category 8051 Low-Voltage Microcontroller (MCU)
CPU Core Enhanced 8051 (1T, single clock cycle)
Maximum Clock Frequency 30 MHz (low-voltage variant)
Program Flash Memory 8 KB
RAM 512 Bytes (256 + 256 XRAM)
EEPROM Integrated (several KB)
ADC 10-bit, 8 channels
PWM / PCA 2 channels (CCP/PCA/PWM)
Timers 2 x 16-bit + WDT
UART 1 x UART
SPI 1 x SPI interface
I/O Pins Up to 26 I/O pins (package dependent)
Voltage Supply Range 2.4V to 3.6V (L – Low Voltage)
Internal Oscillator Internal high-precision RC
Operating Temperature -40°C to +85°C
ISP/IAP Yes (no external programmer needed)

Features

  • Enhanced 1T 8051 core, 8-12x faster than traditional 8051
  • Low voltage operation: 2.4V to 3.6V (L variant)
  • Up to 30MHz operating frequency
  • 8KB Flash program memory, 100,000+ erase cycles
  • ISP/IAP – in-system/in-application programming
  • 512 bytes RAM (256 + 256 XRAM)
  • Built-in EEPROM function
  • 8-channel 10-bit high-speed ADC
  • 2-channel PCA/CCP/PWM
  • Hardware SPI interface
  • Enhanced UART
  • Internal high-precision RC oscillator
  • Watchdog timer (WDT)
  • Power-on reset and low-voltage detection
  • Multiple I/O modes: quasi-bidirectional, push-pull, open-drain, input-only
  • Low power modes: slow-down, idle, power-down
  • Power-down wake-up via external interrupts and dedicated timer
  • Brown-out detection
  • -40°C to +85°C operating temperature

Applications

  • Battery-powered devices
  • Portable consumer electronics
  • IoT and wireless sensor nodes
  • Wearable technology
  • Smart home devices
  • Remote control and wireless modules
  • Low-power industrial sensors
  • Data logging and measurement

The STC15L408AD is a low-voltage member of STC Micro’s STC15 series of enhanced 8051 microcontrollers. The ‘L’ in the part number indicates low-voltage operation from 2.4V to 3.6V, making it specifically designed for battery-powered and low-power applications where energy efficiency is critical. Featuring a 1T (single clock cycle) enhanced 8051 core that executes instructions 8 to 12 times faster than a traditional 12T 8051, the device offers impressive performance at very low power consumption levels. With 8KB of Flash program memory, 512 bytes of RAM, and built-in EEPROM, it provides sufficient resources for many embedded applications. The integrated 10-bit, 8-channel ADC enables analog signal measurement, while the 2-channel PCA/CCP/PWM modules support motor control, PWM generation, and capture functions. Additional peripherals include a hardware SPI interface, an enhanced UART, two 16-bit timers, and a watchdog timer. Multiple low-power modes including slow-down, idle, and power-down (with wake-up via external interrupts and a dedicated low-power timer) allow designers to optimize power consumption for battery-operated devices. The internal high-precision RC oscillator eliminates the need for external crystals, reducing both cost and PCB space. The STC15L408AD is ideal for portable electronics, IoT sensor nodes, wearable devices, remote controls, and other low-power embedded applications.

The STC15L408AD utilizes an enhanced 1T 8051 CPU core where each machine cycle consists of a single clock cycle, dramatically increasing execution speed compared to traditional 12-cycle 8051 architectures. The CPU fetches instructions from on-chip Flash memory, processes data using internal registers and the ALU, and manages data through both 256 bytes of internal RAM and 256 bytes of extended RAM (XRAM). The 10-bit ADC converts analog inputs from 8 channels into digital values for processing. The PCA (Programmable Counter Array) provides 2 channels each supporting capture, compare, and PWM modes, enabling versatile timing and waveform generation functions. Multiple low-power modes allow significant energy savings: slow-down mode reduces the system clock, idle mode stops the CPU while keeping peripherals running, and power-down mode halts all operations with minimal current consumption. Power-down mode can be awakened by external interrupts, the UART, or a dedicated low-power wake-up timer, enabling event-driven battery operation. ISP/IAP capability allows firmware updates through the serial port without specialized hardware.

Pin Group Pins Description
P0 Port P0.0-P0.7 8-bit I/O port (on larger packages)
P1 Port P1.0-P1.7 8-bit I/O, ADC inputs, CCP/PWM
P3 Port P3.0-P3.7 8-bit I/O, UART (RXD/TXD), INT0/INT1, T0/T1
P5 Port P5.0-P5.5 Additional I/O ports
Reset RST Reset input
Clock P1.6/P1.7 (optional) External oscillator (optional, internal RC available)
Power VCC, GND Power supply (2.4-3.6V) and ground

Note: Exact pin count depends on package variant (SOP-16, DIP-16, SOP-20, etc.)

  • Battery-powered portable devices
  • Wearable electronics and smartwatches
  • IoT sensor nodes and wireless modules
  • Remote control devices (RF/BLE/Zigbee)
  • Smart home low-power sensors
  • Industrial low-power monitoring
  • Portable medical devices
  • Data loggers and measurement tools
Model Manufacturer Description
STC15W408AS STC Micro Wide voltage version (2.4-5.5V)
STC15F2K60S2 STC Micro 60KB Flash, larger STC15 variant
STC8G1K08A STC Micro STC8 series, 8KB Flash, enhanced
STM8S003F3 STMicroelectronics STM8 8-bit MCU, 8KB Flash
ATTINY85 Microchip AVR 8-bit MCU, 8KB Flash
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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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