# USB to Multi-Protocol Serial Adapter: RS-232 / TTL UART / RS-485

**Type:** Product page · **SKU:** ADA5995 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/usb-to-multi-protocol-serial-adapter-rs232-ttl-uart-rs485-adafruit.html ([markdown](https://core-electronics.com.au/usb-to-multi-protocol-serial-adapter-rs232-ttl-uart-rs485-adafruit.html.md))

No matter what serial-esque protocol you need to interface with, this USB to Multi-Protocol Serial adapter will be able to get this-connected-to-that. It...

## Pricing

- **Price:** $39.95 (inc GST) — $36.32 AUD, exc GST
- **Quantity discounts:** 10+ $35.23 (exc GST) · 50+ $34.50 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 19 and Aug 24.

## Description

No matter what serial-esque protocol you need to interface with, this **USB to Multi-Protocol Serial** adapter will be able to get this-connected-to-that. It supports **RS232 serial**, **TTL UART serial**, **RS485** and **RS422**. All with quick-connecting screw terminals so you don't need to do any soldering or use special cables.

Just plug directly into a computer's USB A port and use a Phillips screwdriver to open the terminal and insert a solid or stranded-core wire. The USB A is even the flippable kind so you will always be able to have the labels and LEDs facing you.

Inside is a [FTDI FT231 USB to serial converter](https://www.digikey.com/en/products/detail/ftdi-future-technology-devices-international-ltd/FT231XS-R/3029139) - this chip uses 5V logic and provides the UART serial signals that are converted into the different formats. Supported signal rates are 300 baud to 3 Mbaud. FTDI drivers are built into just about every OS these days - but if you need to install, there's free [VCP drivers](https://ftdichip.com/drivers/vcp-drivers/)

- For the **RS-232** signal side, theres a [UM213](https://www.digikey.com/en/htmldatasheets/production/9218476/0/0/1/um213eeasr) signal level converter with +-8V logic level I/O. All eight (5/3) RS-232 signals are exposed. The RS-232 converter can handle up to 250kbps.
- For the **UART** signal side, it is connected directly to the FT231. Logic level is 5V, and only RX/TX and 5V/3V/GND are exposed.
- For **RS-485/RS-422** signal side, the UART RX/TX lines are connected to [MAX485](https://www.analog.com/en/products/max485.html) chips.
- As a bonus, you also get 5V and 3V (with matching Ground) power supplies to power small projects - the 5V is from the USB so its technically 500mA but you can probably draw 1A, 3.3V is from the FT231X and is 50mA output.
- Red 'Power good' LED, Green 'Data transmission' LED

**Please note:** there's only one USB-serial chip inside, so you can only use one protocol at a time!

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/A/D/ADA5995-1.jpg)