PCF8574 SOP16 chip I/O Extension 8bit I2C

£6.00 GBP
The price is for a single piece.
There are 3 pieces in the retail box.
The quantity has to be a multiple of 3.
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Categories: Component IC

Introducing a stroke of genius from the digital sorcerers at Lonely Binary: the Lonely Binary PCF8574 Remote 8-Bit IO Expander for I2C Bus! Prepare to embark on a whimsical journey through the enchanted realm of data expansion, where our creation takes center stage.

Step into the spotlight, dear friend, as we unveil the masterpiece that redefines I/O expansion with an enchanting twist. Behold the Lonely Binary PCF8574, a wondrous 8-bit input/output (I/O) expander that operates within the mystical realm of the two-line bidirectional bus (I2C). This magical marvel is crafted to thrive in the energetic embrace of 2.5 to 6 volts of VCC power, ensuring it shines brightly across a spectrum of microcontroller families.

Gaze upon the canvas of innovation as the PCF8574, designed by none other than Lonely Binary, casts a spell with its general-purpose remote I/O expansion capabilities. This enchantment is woven through the threads of the I2C interface, a dance of communication orchestrated by the mesmerizing serial clock (SCL) and the whimsical serial data (SDA).

But wait, there's more to this tale of technological enchantment! Our creation boasts an 8-bit quasi-bidirectional I/O port, affectionately known as P0–P7. These mystical ports possess the power to light up the night sky, thanks to their latched outputs with a high-current drive that can commandeer LEDs as if by magic. Each port is a versatile chameleon, morphing seamlessly between input and output without the need for the customary data-direction control incantation.

And what's this? As the stars align during power-up, the I/Os awaken, standing tall and proud in their high state. In this mode, only a current source to VCC stirs, crafting a delicate balance between power and potential. It's a symphony of electrons and possibility, composed by Lonely Binary's visionary engineers.

So there you have it, a tale woven with bits and bytes, spells and switches – all brought to life by Lonely Binary's artistry. Elevate your digital journey with the Lonely Binary PCF8574 Remote 8-Bit IO Expander for I2C Bus, and let the magic unfold as you venture forth into the uncharted territories of data expansion. With each mention of Lonely Binary, we summon the digital spirits that make this creation a reality, inviting you to be a part of our enchanting narrative.



What’s in the Box

There are 3 pieces in the retail box.
The listing price is for

  • 1 x PCF8574



  • Australia Orders over $55 - Your order will enjoy free shipping via Australia Post Standard Shipping Services. 
  • International Orders over $99 - Your order will be posted via Australia Post Air Mail Services. 

Raspberry Pi board / Micro:bit board / NVIDIA board will be excluded; All PCB orders will not enjoy free shipping. Distributors and wholesale orders are not eligible for free shipping.


At this time, LONELY BINARY is an online-only business, with our products available through lonelybinary.com. This allows us to keep the cost down for the customer. Orders cannot be picked up. 


We ship Australia wide to all addresses, including PO Box, Parcel Locker, etc.All Australian orders will be shipped via Australia Post, Courier Please or Fastway Couriers (Aramex). International Orders will be shipped via Australia Post or DHL. Your order will be shipped within one business day after we receive payment, providing the items are in stock.

  • Standard Shipping
    Sent via standard Australia Post stamped letter mail, typically 5-9 business days. No tracking/support available other than confirmation of dispatch.
  • Express Post
    Sent via Australia Post Express Service, Fastway Courier or Courier Please, 1 – 2 business days for metro orders, potentially longer for orders outside of metro zones, with full tracking.

Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.

Shipping costs for international orders vary depending on location and package size, where possible we have kept this to flat rate charges to reduce confusion. International orders are shipped through Australia Post and DHL courier service depending on the most economical at the time. 


Shipping Method via Delivery Area Delivery Time(business day) Tracking No. Weight Limit
DHL Asia 1-2 YES No Limit
western EU 2-3 YES No Limit
eastern EU 3-5 YES No Limit
North America 2-3 YES No Limit
Australia 2-3 YES No Limit
South America 3-5 YES No Limit
South Africa 3-5 YES No Limit


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