PCF8574ADWR Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
PCF8574ADWR is a remote 8-bit I/O expander for I2C-bus by Texas Instruments. It features 8 quasi-bidirectional I/O ports, up to 100kHz clock frequency, and configurable I2C addresses. Ideal for microcontroller I/O expansion in consumer and industrial applications. From $0.567, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- PCF8574ADWR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.5670(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-bit quasi-bidirectional I/O expansion via I2C bus with minimal external components
- Supports up to 100kHz I2C clock frequency for reliable communication
- Configurable I2C address via 3 address pins, allowing up to 8 devices on one bus
- Interrupt output for alerting host controller on I/O state changes
- Available in compact 16-pin SOIC package (PCF8574ADWR) for space-constrained designs
Applications
The PCF8574ADWR is widely used in microcontroller-based systems that require additional GPIO pins without consuming extra MCU resources. It is commonly deployed in LCD display interfaces, LED matrix control, keyboard scanning, and industrial I/O expansion modules. Its simple I2C interface and low power consumption also make it suitable for IoT sensor nodes, home automation controllers, and portable consumer electronics.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Address Bus Width | 8 |
| Clock Frequency-Max | 0.1MHz |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Number of Bits | 8 |
| Number of I/O Lines | 8 |
| Number of Ports | 8 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max | 0.1mA |
| Supply Voltage-Max | 6V |
| Supply Voltage-Min | 2.5V |
| Supply Voltage-Nom | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| uPs/uCs/Peripheral ICs Type | PARALLEL IO PORT, GENERAL PURPOSE |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Taiwan |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for PCF8574ADWR:
Frequently Asked Questions
What is the maximum I2C clock frequency supported by the PCF8574ADWR?
The PCF8574ADWR supports a maximum I2C clock frequency of 100kHz (standard mode). This makes it compatible with virtually all microcontrollers that implement the I2C protocol, including Arduino, STM32, and ESP32 platforms.
How many PCF8574ADWR devices can be connected on the same I2C bus?
Up to 8 PCF8574ADWR devices can share a single I2C bus simultaneously. Each device uses 3 hardware address pins (A0, A1, A2) to set a unique 3-bit address, enabling a total of 64 additional I/O lines from just two bus wires.
What are typical applications for the PCF8574ADWR?
The PCF8574ADWR is commonly used for LCD backpack interfaces, LED control, keypad scanning, relay driving, and general-purpose GPIO expansion in embedded systems. It is especially popular in Arduino shields and Raspberry Pi expansion boards due to its simple I2C interface.
What package does the PCF8574ADWR come in, and what are its key dimensions?
The PCF8574ADWR comes in a 16-pin Small Outline Integrated Circuit (SOIC) package with a 1.27mm pin pitch. This surface-mount package is compact and easy to solder, making it suitable for high-density PCB designs in both consumer and industrial applications.
Is the PCF8574ADWR RoHS compliant and lead-free?
Yes, the PCF8574ADWR is fully RoHS compliant and lead-free (Pbfree Code: Yes, JESD-609 Code: e4). It meets international environmental regulations for hazardous substances, making it suitable for use in consumer electronics and products sold in the EU and other regulated markets.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.9970 | $1.00 |
| 10+ | $0.8542 | $8.54 |
| 25+ | $0.6628 | $16.57 |
| 64+ | $0.5670 | $36.29 |
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