PCF8574DW Texas Instruments interface-io-expanders (SOIC-16) In Stock
PCF8574DW is an 8-bit I2C I/O expander by Texas Instruments in SOIC-16 package, operating 2.5V to 6V, with interrupt output. In stock from $0.55; global shipping, 1-piece minimum order.
- Manufacturer
- Texas Instruments
- Package
- SOIC-16
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- PCF8574DW Datasheet PDF
- Category
- interface-io-expanders
- Price
- From $0.5507(MOQ 320)
- Temp Range
- 0.0°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Applications
Commonly used in industrial controllers, home automation, and embedded systems to expand microcontroller GPIO over I2C. Also found in display drivers, keyboard matrices, and sensor hubs where additional I/O lines are needed without extra MCU pins.
Specifications
| supply_voltage | 2.5V to 6V |
| interface | I2C / SMBus (400kHz Fast-mode) |
| io_count | 8 |
| operating_temperature | 0C to 70C |
| package | SOIC-16 Wide |
| interrupt | Active-low interrupt output |
| Package | SOIC-16 |
Compliance & Regulatory
| RoHS Status | Compliant |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the PCF8574DW used for?
The PCF8574DW is an 8-bit I2C I/O expander from Texas Instruments. It is used to add 8 additional GPIO lines to a microcontroller over a 2-wire I2C bus, commonly in industrial panels, home automation, keyboard matrices, and display controllers where MCU pin count is limited.
What package and pin count does the PCF8574DW have?
The PCF8574DW comes in a 16-pin SOIC wide-body (DW) package. It has 8 I/O pins, 3 address select pins (A0-A2), SDA/SCL for I2C, an interrupt output pin, VCC, and GND, totaling 16 pins.
What is the supply voltage and operating temperature for PCF8574DW?
The PCF8574DW operates from 2.5V to 6V supply voltage, making it compatible with both 3.3V and 5V systems. The commercial grade device supports 0C to 70C operating temperature range.
What are the alternatives to PCF8574DW?
Common alternatives to the PCF8574DW include the PCF8574ATW (same function, alternate I2C address range, also TI), MCP23008 (Microchip, 8-bit I2C I/O expander, SOIC-18), and PCA9534 (NXP, 8-bit I2C I/O expander, lower power). All provide 8 quasi-bidirectional I/O ports over I2C.
Is the PCF8574DW RoHS compliant?
Yes, the PCF8574DW is RoHS compliant and manufactured as a lead-free component by Texas Instruments. It meets EU RoHS Directive requirements restricting hazardous substances in electronic equipment.
Related Guides
DP83848 10/100 Mbps Ethernet PHY Transceiver: How to Choose the Right Variant
A complete selection guide for the DP83848 family: compare temperature grades, packages, JTAG support, and interface options across all five variants.
Jun 2, 2026
LM5156 Wide-VIN Boost/SEPIC/Flyback Controller: How to Choose the Right Variant
A concise selection guide for the LM5156 and LM51561 family: how to choose between automotive vs industrial grade, spread-spectrum vs fixed-frequency, and WSON-8 vs HTSSOP-14 package.
Jun 2, 2026
24LC01B I2C EEPROM Design Guide: Pinout, Write Timing, and Package Selection
Complete application note for the Microchip 24LC01B 1 Kbit I2C EEPROM: address wiring, pull-up sizing, acknowledge polling, page-write alignment, and package selection.
Jun 1, 2026
AD8531ARTZ-REEL7 Application Note: High-Current Op-Amp Design Guide
A complete design guide for the AD8531ARTZ-REEL7 250 mA rail-to-rail op-amp: decoupling, thermal budgeting, capacitive load stability, and PCB layout best practices.
Jun 1, 2026
Why Buy from FindMyChip
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.
More from Texas Instruments
LM1086IT-ADJ/NOPB
Transistor Outline, Vertical
Integrated Circuit
TPS37043A8OFDDFRQ1
SOT23 (8-Pin)
Integrated Circuit
LM139AWGRQMLV
Other
Integrated Circuit
MSP430F5436AIZQWR
BGA
Integrated Circuit
LM1086IT-5.0/NOPB
Transistor Outline, Vertical
Integrated Circuit
OPA2347UAG4
Small Outline Packages
Integrated Circuit
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 320+ | $1.3907 | $445.04 |
| 340+ | $0.5955 | $202.47 |
| 440+ | $0.5731 | $252.16 |
| 545+ | $0.5507 | $300.13 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“FindMyChip sourced our entire STM32 BOM in 48 hours when our usual distributor had 16-week lead times.”