Why does the product photo have a jumper across txd and rxd?

The jumper between TX and RX is mainly used for testing. Short TX, RX means you will receive any data you send. When you program or debug, you can quickly confirm if the TTL adapter is damaged. It saves you time and quickly locates faults.

What is the maximum baud rate of this device?

Build-in FTDI FT232RL Chip, max speed is to 3Mb/s . After testing, we found that data can be transmitted stably below 115200 baud rate.

Does this work with the arduino ide to upload sketches to the arduino pro mini?

yes ,it work with arduino ide to upload sketches to pro mini.

I want to confirm, 5v from the usb side is output to vcc as 5v or converted to 3.3v /1.8v by jumper and sets ttl interface level correct?

Hi, I just checked this on mine with a DMM to verify. Your assumption is correct: the jumper will alter the VCC to 5/3.3/1.8V.

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DSD TECH SH-U09C2 USB to TTL Adapter Built-in FTDI FT232RL IC for Debugging and Programming

DSD TECH SH-U09C2 USB to TTL Adapter Built-in FTDI FT232RL IC for Debugging and Programming

Product ID: 295161520

Details

Brand
DSD TECH
Colour
Transparent
Compatible Devices
GPS
Connector Type
USB
Item dimensions L x W x H
38 x 10 x 4

⚡3Mbps max data speed

🔄Switchable 1.8V/3.3V/5V logic levels

🛡️Protective transparent casing

SAR 163

Duties & taxes included

In stock

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Description

🚀 Elevate your debugging game with the ultimate USB-to-TTL adapter—power, protection, and precision in one sleek package!

ROBUST FTDI FT 232 RL CORE - Powered by the original FTDI chip ensuring rock-solid, reliable USB-to-TTL communication at up to 3Mbps.
TRUSTED SUPPORT WARRANTY - Backed by a 12-month warranty and responsive 24-hour customer service to keep your projects on track.
CROSS PLATFORM COMPATIBILITY - Effortlessly integrates with Windows, Linux, and Mac OS for versatile debugging and programming workflows.
STATIC SHORT CIRCUIT SHIELD - Transparent protective case guards your adapter from static interference and accidental shorts—work worry-free.
UNIVERSAL LOGIC LEVEL FLEXIBILITY - Seamlessly toggle between 1.8V, 3.3V, and 5V TTL levels to match any project requirement.

The DSD TECH SH-U09C2 USB to TTL Adapter features the original FTDI FT232RL IC, supporting switchable 1.8V, 3.3V, and 5V logic levels for versatile hardware interfacing. Encased in a transparent protective shell, it prevents static and short circuits, ensuring durability. Compatible across Windows, Linux, and Mac OS, it delivers up to 3Mbps data transfer speed, ideal for programming, debugging, and firmware flashing tasks. Backed by a 12-month warranty and responsive support, it’s a reliable tool for professionals and DIY enthusiasts alike.

Specifications

ASIN	B07TXVRQ7V
Best Sellers Rank	#64,388 in Computers & Accessories ( See Top 100 in Computers & Accessories ) #234 in Serial Adapters
Brand Name	DSD TECH
Colour	Transparent
Compatible Devices	GPS
Connector Type	USB
Customer Reviews	4.8 4.8 out of 5 stars (907)
Input Voltage	5 Volts
Item Dimensions	38 x 10 x 4 Millimeters
Item Package Quantity	1
Item Weight Unit of Measure	0.2 Ounces
Manufacturer	DSD TECH
Manufacturer Part Number	SH-U09C2
Model Number	SH-U09C2
Number of Items	1
Number of Ports	1
Power Plug Type	No Plug
Product Finish Type	Plastic
UPC	734678383287
Unit Count	1.0 Count
Warranty Description	no warranty available
Warranty Type	12 months warranty.if

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