# RS-485 Breakout

**Type:** Product page · **SKU:** BOB-10124 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia)
**Page:** https://core-electronics.com.au/rs-485-breakout.html ([markdown](https://core-electronics.com.au/rs-485-breakout.html.md))

This is a breakout board for the SP3485 RS-485 transceiver IC, which will convert a UART serial stream to RS-485. The SP3485 is a half-duplex transceiver, so it can only communicate one way at a time, but it can reach transmission speeds of up to 10Mbps. This board requires a very low amount of power and can operate from a single +3.3VDC supply.

## Pricing

- **Price:** $20.80 (inc GST) — $18.91 AUD, exc GST
- **Quantity discounts:** 5+ $18.35 (exc GST) · 25+ $17.96 (exc GST) · 100+ $17.21 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 1 today, and up to 100 more in 5–11 days.

## Description

This is a breakout board for the SP3485 RS-485 transceiver IC, which will convert a UART serial stream to RS-485. The SP3485 is a half-duplex transceiver, so it can only communicate one way at a time, but it can reach transmission speeds of up to 10Mbps. This board requires a very low amount of power and can operate from a single +3.3VDC supply.

 This breakout board includes the SP3485 RS-485 transceiver, filter capacitor, and other components shown on the schematic. We’ve broken out the RS-485 output to three different connections: (1) an [RJ-45 connector](https://core-electronics.com.au/search/?q=00643), (2) a [3-pin 3.55mm screw terminal](https://core-electronics.com.au/search/?q=08235), and (3) a 3-pin 0.1" pitch header; none of these output connectors come populated.

**Features:**

- Fully equipped with SP3485 RS-485 transceiver and supporting components
- Operates from a single +3.3V supply
- Interoperable with +5.0V logic
- RS-485 input/output broken out to RJ-45 connector, 3.5mm screw terminal, and 0.1" pitch header
- Driver/Receiver Enable connected to RTS line
- -7V to +12V Common-Mode Input Voltage Range
- Allows up to 32 transceivers on the serial bus
- Driver Output Short-Circuit Protection
 
**Dimensions:** 0.9x1.0"

**Documents:**

- [Schematic](https://core-electronics.com.au/attachments/localcontent/RS485-Breakout-v13_18052907ffb.pdf)
- [Eagle Files](https://core-electronics.com.au/attachments/localcontent/RS485-Breakout-v13_256173fdc15.zip)
- [Datasheet](https://core-electronics.com.au/attachments/localcontent/sp3485CN-LTR_128404e9421.pdf) (SP3485)
 
**Replaces:**[BOB-009823](https://core-electronics.com.au/search/?q=09823)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/r/s/rs-485_breakout__bob-10124__01.jpg)