Where to Source 28 Pin Microcontroller Pinout Suppliers?

Global supply of 28-pin microcontrollers is concentrated in Shenzhen, China—a hub for semiconductor distribution and electronics component trading. The region hosts a dense network of authorized distributors, independent traders, and brand-holding suppliers with access to legacy and active-production MCUs from manufacturers such as Microchip, Atmel (now part of Microchip), and STMicroelectronics. Shenzhen’s ecosystem enables rapid inventory turnover, with many suppliers maintaining on-hand stock of common variants like the ATMEGA328P-PU and PIC16F series.

This aggregation of technical expertise and logistics infrastructure supports efficient order fulfillment for both prototyping and mid-volume production. Buyers benefit from short lead times—often 3–7 days post-payment—and flexible shipping options across international markets. The presence of third-party verification services and standardized packaging protocols further enhances transaction reliability in this mature sourcing region.

How to Evaluate 28 Pin Microcontroller Pinout Suppliers?

Procurement decisions should be guided by structured assessment criteria to mitigate risks related to counterfeit components, delivery delays, and technical incompatibility.

Product Authenticity & Traceability
Prioritize suppliers who explicitly label products as “original” or “new original” and provide batch numbers or date codes. Cross-reference part numbers (e.g., ATMEGA328P-PU, dsPIC30F2010) against manufacturer datasheets to confirm pin compatibility. Avoid vendors offering prices significantly below market average, which may indicate recycled or remarked ICs.

Supply Chain Reliability Metrics
Assess supplier performance using verifiable operational data:

• On-time delivery rate exceeding 95% indicates logistical efficiency
• Response time under 2 hours reflects strong customer support capacity
• Reorder rates above 30% suggest consistent product quality and service satisfaction
• Minimum order quantities (MOQs) ranging from 1 to 10 pieces accommodate low-volume testing

Suppliers with customization capabilities—including labeling, tape-reeling, or PCB integration—demonstrate added value for downstream assembly processes.

Transaction Security Protocols
Utilize payment protection mechanisms where available. Verify transaction history through revenue indicators (e.g., annual online sales exceeding US $100,000) and repeat buyer metrics. Request sample testing before bulk orders to validate electrical functionality and pinout alignment against standard DIP-28 or SOIC-28 footprints.

What Are the Leading 28 Pin Microcontroller Pinout Suppliers?

Performance Analysis
Shenzhen Qiteda stands out with a 100% on-time delivery record and the highest reorder rate (47%), indicating strong buyer confidence and inventory reliability. Its competitive pricing ($0.11/piece minimum) makes it suitable for cost-sensitive, high-volume applications. Shenzhen Qz Industrial offers broader customization options, including color coding and packaging labels, beneficial for OEM integration. ShenZhen Nova Semiconductor, designated as a Brand Holder, provides flexibility with single-unit MOQs and direct access to original components. While Atla Semicondutor has a lower on-time delivery rate (88%), its sub-one-hour response time supports urgent procurement cycles. Yonglisheng Electronics offers stable pricing but slower communication, which may impact time-critical projects.

FAQs

How to verify authenticity of 28-pin microcontrollers?

Request clear images of markings, date codes, and packaging. Compare physical characteristics with official manufacturer documentation. Use multimeter continuity tests or programmer verification to confirm device ID and memory signatures. Prefer suppliers offering "original new" or "factory sealed" stock.

What is the typical lead time for shipment?

Most suppliers dispatch within 1–3 business days after payment confirmation. International delivery via express courier takes 3–7 days depending on destination. Air freight for larger batches averages 5–10 days.

Can I order a single sample unit?

Yes, multiple suppliers listed offer MOQs of 1 piece, enabling prototype validation. Prices for single units may be higher than bulk rates but allow functional testing prior to volume purchase.

Do these suppliers support custom labeling or packaging?

Selected suppliers—particularly Shenzhen Qz Industrial and Shenzhen Qiteda—offer customization options such as branding, color coding, and specialized packaging materials. Confirm availability during initial inquiry.

Are RoHS and REACH compliance standards enforced?

Compliance is typically assumed for modern ICs unless otherwise stated. Buyers should explicitly request conformity documentation if required for regulatory certification in end-use markets.