--- product_id: 476313988 title: "10Pcs PCF8575 IO Expander Board Module I2C to 16 IO Extension Module I2C Communication Control 16 bit SMBus I/O Ports" brand: "aitiao" price: "129.58 DT" currency: TND in_stock: true reviews_count: 4 category: "Aitiao" url: https://www.desertcart.tn/products/476313988-10pcs-pcf8575-io-expander-board-module-i2c-to-16-io store_origin: TN region: Tunisia --- # 2.5-5.5V wide voltage range I2C communication control 16-bit I/O expansion 10Pcs PCF8575 IO Expander Board Module I2C to 16 IO Extension Module I2C Communication Control 16 bit SMBus I/O Ports **Brand:** aitiao **Price:** 129.58 DT **Availability:** ✅ In Stock ## Summary > 🚀 Unlock 16x More I/O Power — Control Smarter, Not Harder! ## Quick Answers - **What is this?** 10Pcs PCF8575 IO Expander Board Module I2C to 16 IO Extension Module I2C Communication Control 16 bit SMBus I/O Ports by aitiao - **How much does it cost?** 129.58 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/476313988-10pcs-pcf8575-io-expander-board-module-i2c-to-16-io) ## Best For - aitiao enthusiasts ## Why This Product - Trusted aitiao brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact & Versatile:** Small 4x2.1cm footprint fits neatly into any project, ideal for controlling relays, buzzers, LEDs, and buttons. - • **Instant Interrupt Feedback:** Open-drain interrupt pin alerts your system instantly on input changes for real-time responsiveness. - • **Customizable I2C Addressing:** Modify default 0x20 address via A1 and A2 pins to avoid bus conflicts and scale up. - • **Expand Your Control Horizon:** Seamlessly add 16 quasi-bidirectional I/O pins to your MCU projects with I2C simplicity. - • **Flexible Voltage Compatibility:** Operates efficiently between 2.5V and 5.5V DC, perfect for diverse embedded systems. ## Overview The AITIAO 10Pcs PCF8575 IO Expander Board Module offers a robust 16-bit I/O extension via I2C, compatible with popular MCUs like Arduino and Raspberry Pi. Operating between 2.5V and 5.5V with a max current of 100mA, it features customizable I2C addresses and an interrupt pin for efficient input monitoring. Its compact design and flexible voltage make it a must-have for professionals scaling up embedded control projects. ## Description AITIAO 5Pcs PCF8575 IO Expander Board I2C to 16 IO IIC I2C I/O Extension Shield Module DC 2.5-5.5V I2C communication control 16 IO portsFeatures:Available library: PCF8575Working voltage: 2.5 - 5.5V DCWorking current: 100mA(MAX)I2C address: 0x20(default),can be modified by installing A1 and A2.16 individually addressable pins.Each pin configurable for input or outputOpen-drain interrupt output pin for input change interrupt.Great for R3 and other MCU to control simple relay, buzzer, button, led.Size: 4x2.1cm/1.57x0.83inchNote: On board 3.3V level converter circuit, if you donot solder VCC-VDD pad, the PCF8575 level is 3.3V. If you solder it, the level will be the same with VCCPackage Included:10Pcs PCF8575 IO Expander Board Module Review: Works well once you solder the address lines. - I saw the review of the high failure rate and experienced the same failure. I then noticed that the address pins were floating and that if you want to have address 20, jump all the address pins on the back to gnd. After that, I had no failures. So far, they are working well. I am still testing. I am using this to read a Halleffect sensor array. Review: (Not) NOW a bad failure rate.... Dropped a few more stars due to failure - UPDATE: I'm now dropping my rating to 2 Stars as these are failing after 3- 5 days of continuous use. From all 10 units, only two are still working correctly. FYI - I'm putting in 5v and using all 16 pins as INPUT for hall sensors. If you're going to get these, you need to do your own QA for a few weeks first. PREVIOUS: I've tried a number of PCF8575 PCBs here on desertcart and these are probably the most consistent with a failure rate of only 20-25%. YES, I know it should be a failure of 0%, but to be honest... 20-25% is the best I have found on desertcart. I needed 6 boards and I was able to find 6 good ones out of the10 that were shipped. For other companies selling the same 'type' of PCF8575 I would have to order more than 10 pieces. Just expect that the 'actually' price for these boards is actually double the cost and you will be fine. PS: The address for an opened (no shorts on A0, A1, or A2) board should be 32 (HEX:0x20 or BIN:100000). If you get 39 (0x27) you know you have a bad board. ## Features - Available library: PCF8575; I2C address: 0x20(default),can be modified by installing A1 and A2. - Working voltage: 2.5 - 5.5V DC; Working current: 100mA(MAX) - The PCF8575 is controlled through an I2C interface and features 16-bits of quasi-bidirectional input/output pins. - Open-drain interrupt output pin for input change interrupt. - The PCF8575 IO expander board is great for R3 and other MCU to control simple relay, buzzer, button, led. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0B82R7R17 | | Best Sellers Rank | #2,896 in Single Board Computers (Computers & Accessories) | | Brand | AITIAO | | Built-In Media | others | | CPU Model | ARM Cortex A-9 | | Compatible Devices | Microcontrollers (Arduino, Raspberry Pi) | | Connectivity Technology | I2C | | Customer Reviews | 3.9 3.9 out of 5 stars (7) | | Item Dimensions L x W x H | 1.57"L x 0.83"W x 1.57"H | | Manufacturer | AITIAO | | Operating System | Linux | | Processor Count | 1 | | UPC | 701715522886 | | Warranty Description | 1 | ## Product Details - **Brand:** AITIAO - **CPU Model:** ARM Cortex A-9 - **Connectivity Technology:** I2C - **Included Components:** others - **Operating System:** Linux ## Images ![10Pcs PCF8575 IO Expander Board Module I2C to 16 IO Extension Module I2C Communication Control 16 bit SMBus I/O Ports - Image 1](https://m.media-amazon.com/images/I/817gQd6QbYL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐ Works well once you solder the address lines. *by R***N on May 13, 2024* I saw the review of the high failure rate and experienced the same failure. I then noticed that the address pins were floating and that if you want to have address 20, jump all the address pins on the back to gnd. After that, I had no failures. So far, they are working well. I am still testing. I am using this to read a Halleffect sensor array. ### ⭐⭐ (Not) NOW a bad failure rate.... Dropped a few more stars due to failure *by B***E on July 31, 2023* UPDATE: I'm now dropping my rating to 2 Stars as these are failing after 3- 5 days of continuous use. From all 10 units, only two are still working correctly. FYI - I'm putting in 5v and using all 16 pins as INPUT for hall sensors. If you're going to get these, you need to do your own QA for a few weeks first. PREVIOUS: I've tried a number of PCF8575 PCBs here on Amazon and these are probably the most consistent with a failure rate of only 20-25%. YES, I know it should be a failure of 0%, but to be honest... 20-25% is the best I have found on Amazon. I needed 6 boards and I was able to find 6 good ones out of the10 that were shipped. For other companies selling the same 'type' of PCF8575 I would have to order more than 10 pieces. Just expect that the 'actually' price for these boards is actually double the cost and you will be fine. PS: The address for an opened (no shorts on A0, A1, or A2) board should be 32 (HEX:0x20 or BIN:100000). If you get 39 (0x27) you know you have a bad board. ### ⭐ Unreliable *by I***Y on August 18, 2023* So far 3 DOA and 1 last for a couple of hours. Avoid ## Frequently Bought Together - AITIAO 10Pcs PCF8575 IO Expander Board Module I2C to 16 IO Extension Module I2C Communication Control 16 bit SMBus I/O Ports - ALLECIN 20Pcs A3144 3144 Hall Effect Sensor OH3144 AH3144E 3Pins Magnetic Detector --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/476313988-10pcs-pcf8575-io-expander-board-module-i2c-to-16-io](https://www.desertcart.tn/products/476313988-10pcs-pcf8575-io-expander-board-module-i2c-to-16-io) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-05-07*