Attributes

Brand	-
Category	Electronic Components / Maker DIY / Development Boards & Control Boards
Origin	-
Microcontroller Model	STC15W408AS
Package Type	TTSOP20
Operating Voltage	3.3V - 5.5V
Max Clock Speed	35MHz
Flash Memory	8KB
SRAM Size	256 Bytes
GPIO Count	15
Programming Interface	UART / TTL
PCB Dimensions	25mm x 15mm
Net Weight	2 grams

5 reviews

Anonymous

Feb 20, 2026

Rating: 4/5

Good but needs adapter

Board is great, just remember you need a USB-TTL adapter to program it.

Anonymous

Feb 12, 2026

Rating: 4/5

Compact design

Small footprint fits well in tight spaces. Soldering pads are accessible.

Anonymous

Feb 12, 2026

Rating: 5/5

Stable performance

Low power and stable clock source. Ideal for sensor nodes.

Anonymous

Jan 27, 2026

Rating: 5/5

Perfect for learning

Used this for my embedded systems class. Very forgiving for beginners.

Anonymous

Jan 20, 2026

Rating: 5/5

Excellent minimal board

Works perfectly for my 51 projects. The pinout is standard and easy to breadboard.

5 FAQ

Q: Pinout diagram?

A: Please check the product description images for pinout.

Q: Which compiler?

A: Keil C51 or SDCC are commonly used.

Q: Bulk discount?

A: Contact customer service for orders over 50 units.

Q: Is USB cable included?

A: No, please purchase a USB to TTL adapter separately.

Q: Supports 3.3V?

A: Yes, it operates within 3.3V to 5.5V range.

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