SPECIFICATIONS

Application: Computer

Brand Name: YTDMEN

Choice: yes

Condition: New

High-concerned chemical: none

Origin: Mainland China

Package: SMD

Type: Module

is_customized: Yes

Product Applications:
This converter is widely used for:
Radio modification, Mobile phone flashing, XBOX 360 modding, GPS systems, Automotive diagnostics, DVD player reprogramming, HDD repair, Set-top box upgrades

Supported Microcontrollers:
STC MCU series
STM32 MCU series
NXP MCU series
Renesas MCU series
NEC MCU series

Technical Specifications:
Communication Chip: Domestic MAX3232 equivalent
Operating Voltage: 3.3V-5.5V
Interface Pins: TX, RX, VCC, GND

Important Notice:
The converter uses a domestic MAX3232 chip. Some buyers have reported compatibility issues. Please verify chip compatibility with your system before purchase to avoid errors. Thank you for your cooperation!

Case 1: Incompatibility with Lenovo Laptops
Lenovo Laptop + max3232 Serial Small Board + USB-to-Serial Cable (CH340 Driver) → Failed to program stc89c52.
Lenovo Desktop + max3232 Serial Small Board + USB-to-Serial Cable (CH340 Driver) → Worked normally.

Replace max3232 chip with max232 Lenovo laptop + Serial small Board (max232) + USB-to-Serial Cable (CH340 Driver) can normally download download stc89c52 .

Conclusion:
The max3232 may conflict with certain laptops when used via USB-to-serial adapters. If encountering issues, try switching to a max232 chip.

Case 2: Voltage Sensitivity with Samsung 2440 Dev Board

Samsung 2440 Dev Board +Serial small Board max3232 (3.3V) → Unstable communication.

Fix: Increased voltage to 3.8V → work properly.

General Advice:

Confirm your device’s voltage requirements and chip compatibility before purchase.