> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# Logic Level Converter Bi-Directional

**Type:** Product page · **SKU:** BOB-12009 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia)
**Page:** https://core-electronics.com.au/logic-level-converter-bi-directional.html ([markdown](https://core-electronics.com.au/logic-level-converter-bi-directional.html.md))

## Retired product

This product is retired and no longer available for purchase. Replaced by: CE07510.

**Replacement:** https://core-electronics.com.au/catalog/product/view/sku/CE07510

## How to buy

- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

If you’ve ever tried to connect a 3.3V device to a 5V system, you know what a challenge it can be.

This Bi-Directional Logic Level Converter is a small device that:

Safely steps down 5V signals to 3.3V

**AND**

Steps up 3.3V to 5V *at the same time*.

If you'd like to see a **free demonstration** of how you can get it working, view [our Logic Level converter guide for a to-the-point account](https://core-electronics.com.au/guides/digital-electronics/how-to-use-logic-level-shifters-converters/).

This level converter can also work with 2.8V and 1.8V devices. What really separates this Logic level converter from our previous versions is that you can successfully set your high and low voltages and step up and down between them safely on the same channel. Each level converter has the capability of converting 4 pins on the high side to 4 pins on the low side with two inputs and two outputs provided for each side.

The level converter is very easy to use. The board needs to be powered from the two voltages sources (high voltage and low voltage) that your system is using. High voltage (5V for example) to the ‘HV’ pin, low voltage (3.3V for example) to ‘LV’, and ground from the system to the ‘GND’ pin.

**Dimensions:** 0.63 x 0.52" (16.05 x 13.33mm)

**Documents:**

- Schematic
- Eagle Files
- Datasheet (BSS138)
- [Hookup Guide](https://learn.sparkfun.com/tutorials/bi-directional-logic-level-conter-hookup-guide)
- [GitHub](https://github.com/sparkfun/Logic_Level_Bidirectional)
- [Product Video](https://www.sparkfun.com/videos#all/K3SPijvXtew/16)

## Guides for this product

- [WS2812 / NeoPixel Addressable LEDs: Pycom Quickstart Guide](https://core-electronics.com.au/guides/pycom/WS2812_and_NeoPixel_with_Pycom/)
- [WS2812 / NeoPixel Addressable LEDs: Raspberry Pi Quickstart Guide](https://core-electronics.com.au/guides/raspberry-pi/ws2812-addressable-leds-raspberry-pi-quickstart-guide/)
- [How to Use a Logic Level Shifter/Converter](https://core-electronics.com.au/guides/digital-electronics/how-to-use-logic-level-shifters-converters/)
- [Logic Level Converters for Particle](https://core-electronics.com.au/guides/particle/logic-level-converters-for-particle/)

## Videos for this product

- [Logic Level Converters for Particle](https://core-electronics.com.au/videos/logic-level-converters-for-particle)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/l/o/logic_level_converter_bi-directional__bob-12009__01.jpg)