# Sony Spresense Extension Board

**Type:** Product page · **SKU:** ADA4418 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/sony-spresense-extension-board.html ([markdown](https://core-electronics.com.au/sony-spresense-extension-board.html.md))

## Retired product

This product is retired and no longer available for purchase. Search the catalogue for an alternative.

## Description

Spresense is a compact development board based on Sony’s power-efficient multicore microcontroller CXD5602. It allows developers to create IoT applications in a very short time and is supported by the Arduino IDE as well as the more advanced NuttX based SDK. The **Spresense Extension Board** has the following connectors in addition to Arduino Uno compatible pin sockets:

- 3.5 mm headphone jack
- MicroSD card (**not included**, but Adafruit[ carry 'em in the store](https://core-electronics.com.au/search/?q=mega-storage))
- Extra USB port
- Multiple microphone pins
 
The Spresense main board and extension board are connected by a Board-to-Board (B-2-B) connector.

**Note:** This is **just** the extension board. You'll need the [main board as well](https://core-electronics.com.au/sony-spresense-main-board-cxd5602.html).

![](https://core-electronics.com.au/js/tiny_mce/themes/advanced/img/trans.gif)

## Technical Details

**Specifications:**

- [Follow this link for more information on Sony's CXD5602 microcontroller](https://www.sony-semicon.co.jp/e/products/smart-sensing/spresense/)
- [GitHub Repository](https://developer.sony.com/develop/spresense/docs/introduction_en.html#_repository_overview)
- [Spresense hardware and software guides and documentation](https://developer.sony.com/develop/spresense/docs/introduction_en.html#_spresense_software)
- [FAQ](https://developer.sony.com/develop/spresense/docs/faq_en.html)
- Model name: CXD5602PWBEXT1
- Size: 68.6mm x 53.3mm
- Audio input / output: 4 ch analog microphone input or 8 ch digital microphone input, headphone output
- Digital input / output: 3.3 V or 5 V digital I/O
- Analog input: 6 ch (5.0 V range)
- External memory interface: microSD slot
- Operating conditions: Temperature: 10 - 40 ℃, Humidity: 30% - 80% (no condensation)
- Storage conditions: Temperature: -20 - 60 ℃, Humidity: 10% - 80%
 
- [Pinout Diagram](https://cdn-shop.adafruit.com/product-files/4418/4418_pinout.jpg)
- [Schematic](https://cdn-shop.adafruit.com/product-files/4418/4418_schematic.pdf)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/a/d/ada4418-1.jpg)