TCA6408PW Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
TCA6408PW is an 8-bit I/O expander IC with I2C interface operating at up to 400 kHz. Features 8 programmable I/O lines in a 16-pin TSSOP package. Ideal for GPIO expansion in embedded systems, industrial controls, and consumer electronics. In stock worldwide with fast shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- TCA6408PW Datasheet PDF
- Category
- Integrated Circuit
- 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 I/O expander with I2C interface supporting up to 400 kHz Fast-mode operation
- 8 independently programmable I/O pins configurable as inputs or outputs
- Low supply voltage operation compatible with 1.65V to 5.5V systems
- 16-pin TSSOP package for compact PCB footprint in space-constrained designs
- Open-drain interrupt output for efficient host notification on input state changes
Applications
The TCA6408PW is widely used in embedded systems and microcontroller designs where additional GPIO lines are needed beyond what the host processor provides. It is commonly deployed in industrial control panels, consumer electronics, smart home devices, and IoT sensor nodes to manage LEDs, buttons, relays, and other peripherals. Its I2C interface simplifies integration with popular microcontrollers and SoCs, making it a versatile choice for GPIO expansion in both low-power and high-density applications.
Specifications
| Pbfree Code | No |
| YTEOL | 0 |
| Clock Frequency-Max | 0.4MHz |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Number of Bits | 8 |
| Number of I/O Lines | 8 |
| Number of Ports | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 1.65V |
| Supply Voltage-Nom | 1.8V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| 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 | 8542.39.00.60 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the maximum I2C clock frequency supported by the TCA6408PW?
The TCA6408PW supports I2C Fast-mode operation with a maximum clock frequency of 400 kHz. This allows efficient communication with most microcontrollers and SoCs that use standard or fast I2C interfaces.
How many I/O pins does the TCA6408PW provide and can they be configured individually?
The TCA6408PW provides 8 I/O pins (P0–P7) across a single port. Each pin can be independently configured as either an input or output via the configuration register, offering flexible GPIO expansion for diverse application needs.
What package does the TCA6408PW come in and what are its supply voltage requirements?
The TCA6408PW is housed in a 16-pin TSSOP (PDSO-G16) package with a 0.25 mm pitch, suitable for compact designs. It operates from a supply voltage range of 1.65V to 5.5V, making it compatible with a wide range of logic levels and power rails.
What are common applications for the TCA6408PW I/O expander?
The TCA6408PW is commonly used in IoT devices, industrial controllers, consumer electronics, and smart home systems to expand GPIO capacity. Typical use cases include driving LEDs, reading button states, controlling relays, and interfacing with sensors where the host MCU has insufficient I/O pins.
Related Guides
TPS61291DRVR Selection Guide: Low-Quiescent-Current Boost Converters for IoT and Wearables
How to select the TPS61291DRVR and low-Iq boost converters for IoT, wearables, and coin-cell designs. Compares specs, packages, and alternatives from TI, ADI, and Microchip.
May 13, 2026
TMS5704357BZWTQQ1 Selection Guide: Choosing the Right TMS570 Automotive MCU Variant
Compare TMS570 automotive MCU variants by ASIL level, flash, package, and peripherals. Find the right fit from entry-level LQFP to the ASIL-D TMS5704357BZWTQQ1.
May 13, 2026
TI Hercules TMS5704357BZWTQQ1 Design Guide for Automotive ASIL-D and Industrial Functional Safety
Complete integration guide for the TI Hercules TMS5704357BZWTQQ1 dual-core lockstep Cortex-R5F MCU: lockstep CPU, ECC RAM, FlexRay/CAN-FD, and ASIL-D pitfalls.
May 12, 2026
PTN78000WAH Selection Guide: Choosing the Right 1.5 A 36 V Step-Down Power Module
Compare PTN78000WAH against PTN78000WAS, PTN78060WAH, and other 1.5A 36V step-down modules. Covers package, current rating, efficiency, and drop-in replaceability.
May 12, 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
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Response time is incredible — usually under 4 hours. They understand that production lines can't wait.”