What voltage are the Tx/Rx pins? It looks like you might be able to change to 3.3 or 5.0

There are 3.3 volt and 5 volt pins. But these are for supply output from USB to your board, not a select-able Rx/Tx voltage. The chip is a 3.3 volt chip with a build in regulator. So one must assume that the TX/Rx outputs are 3.3 v. But the datasheet does not explicitly state this. I would consider a voltage divider for incoming 5 volt TTL.

Where is the driver for win 10?

You can download the corresponding driver from this link: https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers

Got these to connect to a 4800 baud gps. driver loaded fine, connec gnd-gnd, gps + to rxd. rx led flashes, win10 visualgps just displays trash, ideas?

Try a lower baud baud rate. Usually “trash” output means the baud rate is incorrect.

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IZOKEE CP2102 Module USB to TTL 5PIN Serial Converter Adapter Module, UART STC Downloader for 3.3V and 5V with Jumper Wires (2pcs)

Product ID: 326101204

Details

Brand
IZOKEE
Compatible devices
Laptop
Connector type
Serial Adapter
Finish type
Matte
Specific uses for product
PC

⚡Supports 3.3V & 5V logic levels

📈1 Amp current rating for stable power

🔌USB to TTL 5PIN serial interface

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€ 33.73

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Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power your projects with precision and style!

TRUSTED BY PROS - Top-rated with 4.6 stars from 525+ users—join the savvy tech crowd
COMPACT DURABLE DESIGN - Matte red finish with a robust build that fits any workspace aesthetic
DUAL VOLTAGE COMPATIBILITY - Effortlessly switches between 3.3V and 5V for versatile project needs
PLUG PLAY USB CONNECTIVITY - Seamlessly bridges your PC and serial devices without hassle
COMPLETE KIT WITH JUMPER WIRES - Includes 2 modules plus jumper wires for immediate prototyping

The IZOKEE CP2102 USB to TTL 5PIN Serial Converter Adapter Module is a reliable, dual-voltage (3.3V/5V) UART downloader designed for seamless serial communication. Featuring a 1 Amp current rating and a matte red finish, this 2-pack includes jumper wires for quick setup, making it an essential tool for developers and tech enthusiasts looking to bridge USB and serial devices with ease.

Specifications

ASIN	B07D6LLX19
Best Sellers Rank	#59,487 in Computers ( See Top 100 in Computers ) #139 in Serial Adapters
Brand	IZOKEE
Color	Red
Colour	Red
Compatible Devices	Desktop Computer, Laptop, Game Console, MP3 Player, Monitor, Mouse, Printer, Keyboard, Television, Digital Camera, Amplifier, Projector, Speaker, Headphones
Compatible devices	Desktop Computer, Laptop, Game Console, MP3 Player, Monitor, Mouse, Printer, Keyboard, Television, Digital Camera, Amplifier, Projector, Speaker, Headphones Compatible devices Desktop Computer, Laptop, Game Console, MP3 Player, Monitor, Mouse, Printer, Keyboard, Television, Digital Camera, Amplifier, Projector, Speaker, Headphones See more
Connector Type	USB
Connector type	USB
Current Rating	1 Amps
Customer Reviews	4.6 out of 5 stars 525 Reviews
Finish	Matte
Finish type	Matte
Input Voltage	33 Volts
Manufacturer	IZOKEE
Model Number	8541673101
Number of Items	2
Number of Ports	4
Package Quantity	1
Power Plug Type	No Plug
Specific Uses For Product	PC
Specific uses for product	PC
UPC	760960528098
Unit Count	2.0 Count
Warranty Type	Limited

Reviews

M**R

I’d order it again

27.01.2026

S**D

Reliable and Easy-to-Use USB to TTL Converter!

4.09.2025

J**O

Managing an old NAS

31.10.2025

F**N

Works as expected

16.06.2025

J**N

Interfaces directly to a microcontroller

21.03.2023

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