---
product_id: 32410048
title: "HiLetgo 2pcs PCF8574 PCF8574T IO Expansion Board I/O Expander I2C Evaluation Develop Module"
brand: "hiletgo"
price: "52.98 DT"
currency: TND
in_stock: true
category: "Hi Letgo"
url: https://www.desertcart.tn/products/32410048-hiletgo-2pcs-pcf8574-pcf8574t-io-expansion-board-i-o-expander
store_origin: TN
region: Tunisia
---

# I2C interface for seamless connectivity 8-bit parallel I/O expansion Dual interface access: pin or row seat HiLetgo 2pcs PCF8574 PCF8574T IO Expansion Board I/O Expander I2C Evaluation Develop Module

**Brand:** hiletgo
**Price:** 52.98 DT
**Availability:** ✅ In Stock

## Summary

> ⚡ Supercharge your projects with seamless I/O expansion!

## Quick Answers

- **What is this?** HiLetgo 2pcs PCF8574 PCF8574T IO Expansion Board I/O Expander I2C Evaluation Develop Module by hiletgo
- **How much does it cost?** 52.98 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/32410048-hiletgo-2pcs-pcf8574-pcf8574t-io-expansion-board-i-o-expander)

## Best For

- hiletgo enthusiasts

## Why This Product

- Trusted hiletgo brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted & Tested:** Highly rated with 4.1 stars from 61+ users—join the savvy dev community now.
- • **Compact Powerhouse:** Small form factor with Broadcom processor support, ideal for space-conscious setups.
- • **Plug & Play Versatility:** Supports both pin and row seat connections for flexible integration.
- • **Expand Your MCU's Horizons:** Effortlessly add 8 extra I/O pins via I2C, perfect for complex projects.
- • **Cross-Platform Compatibility:** Works flawlessly with Arduino, Raspberry Pi, and other I2C-enabled boards.

## Overview

The HiLetgo PCF8574T IO Expansion Board is a compact, dual-interface I2C module that adds 8-bit parallel I/O capabilities to microcontrollers like Arduino and Raspberry Pi. Designed for developers facing I/O constraints, it offers flexible pin or row seat connections and is backed by strong user ratings, making it a reliable choice for advanced electronics prototyping.

## Description

desertcart.com: HiLetgo 2pcs PCF8574 PCF8574T IO Expansion Board I/O Expander I2C Evaluation Develop Module : Electronics

## Features

- PCF8574T IO Expansion Board
- The main resources: PCF8574, I2C interface, the 8-bit parallel
- Typical applications: for I / O resource constraints the MCU I / O expansion
- Maximum Features: supports two types of Interface
- access to the target board: Pin or row seat

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01ICN5JB6 |
| Best Sellers Rank | #678 in Single Board Computers (Computers & Accessories) |
| Brand | HiLetgo |
| Compatible Devices | Arduino, Raspberry Pi, and other single-board computers with I2C interfaces |
| Connectivity Technology | I2C |
| Customer Reviews | 4.1 4.1 out of 5 stars (61) |
| Manufacturer | HiLetgo |
| Mfr Part Number | 3-01-1150 |
| Model Name | 3-01-1150 |
| Model Number | 3-01-1150 |
| Operating System | Linux |
| Processor Brand | Broadcom |
| Processor Count | 1 |

## Product Details

- **Brand:** HiLetgo
- **CPU Manufacturer:** Broadcom
- **Connectivity Technology:** I2C
- **Model Name:** 3-01-1150
- **Operating System:** Linux

## Images

![HiLetgo 2pcs PCF8574 PCF8574T IO Expansion Board I/O Expander I2C Evaluation Develop Module - Image 1](https://m.media-amazon.com/images/I/6156N3iQNQL.jpg)

## Questions & Answers

**Q: Is there a wiring schematic for the pull-up resistors to trigger a relay from a esp8266. the pcf8574 wont put out voltage to trigger?**
A: What kind of relay? Need to know voltage and current for the relay coil. Best bet is to use an fet to drive the relay.  Still need to know your relay specs to answer completely.

**Q: Are these only digital I/O or also analog?**
A: These are discrete only, no analog. 
Best to use them as active = low. I follow them with a 74LVC14A when I need active = high.
Note the chips come in 2 address ranges. I have been receiving the low range with consistency.

**Q: Leds connected with vcc = 3.3v to board make them too dim. is this usual?**
A: There are a couple of reasons this could happen. The pins on the PCF8574 can only sink 25 mA of current and, if I'm reading the datasheet correctly, can source much less. So you'll want to put the LED from Vcc to the output pin (so that low = on) and use at least a couple hundred ohms of series resistance.

**Q: Where should the pullup resistor be placed to trigger a relay from an mcu?**
A: You can use any of the I/O pins of the Device. Do not exceed rated current!

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-07-20*