TCA6408ARGTR Texas Instruments Integrated Circuit (Quad Flat No-Lead) In Stock
TCA6408ARGTR is a Texas Instruments 8-bit I2C I/O expander with 2-wire bus interface at up to 400 kHz, providing 8 configurable GPIO pins in a compact 16-pin QFN package. Supports 2-address selection via address pin and 1.65 V to 5.5 V supply voltage range. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Quad Flat No-Lead
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- TCA6408ARGTR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.4620(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 I2C I/O expander with 400 kHz Fast-mode I2C bus interface enabling GPIO expansion for MCUs with limited pin count
- 1.65 V to 5.5 V supply voltage range supporting both 1.8 V and 3.3 V/5 V logic systems with level-shifting capability
- Compact 16-pin QFN package with interrupt output for event-driven GPIO monitoring without continuous I2C polling overhead
Applications
TCA6408ARGTR is used to expand GPIO capacity in microcontroller-based systems such as industrial HMI panels, embedded Linux boards, and IoT gateway devices where the host MCU has insufficient I/O pins. Its I2C interface at up to 400 kHz allows easy daisy-chaining with other I2C peripherals for keyboard scanning, LED control, and relay driving applications. The 1.65 V to 5.5 V supply range makes it compatible with modern low-voltage SoCs and legacy 5 V MCUs in the same board design.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Address Bus Width | 2 |
| Clock Frequency-Max | 0.4MHz |
| JESD-30 Code | S-PQCC-N16 |
| 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 | LCC16,.12SQ,20 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max | 0.02mA |
| 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 (Ni/Pd/Au) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| uPs/uCs/Peripheral ICs Type | PARALLEL IO PORT, GENERAL PURPOSE |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What I2C bus speed does TCA6408ARGTR support and how many GPIO pins does it add?
TCA6408ARGTR supports I2C Fast-mode at up to 400 kHz and provides 8 configurable GPIO pins that can be individually set as inputs or outputs. This allows a single-address device to expand an MCU with 8 additional digital I/O lines using only 2 wire SDA/SCL connections, reducing GPIO pin pressure in embedded system designs.
What supply voltage range does TCA6408ARGTR support for mixed-voltage board designs?
TCA6408ARGTR operates from a supply voltage of 1.65 V to 5.5 V, making it compatible with 1.8 V, 2.5 V, 3.3 V, and 5 V logic systems on the same PCB. This wide voltage range enables use with modern low-power SoCs at 1.8 V as well as traditional 5 V microcontrollers without needing a separate voltage level translator for the 8 I/O lines.
How does TCA6408ARGTR compare to TCA6416A for applications needing only 8 I/O expansion pins?
TCA6408ARGTR provides 8 I/O pins in a smaller 16-pin QFN package compared to TCA6416A which offers 16 I/O pins in a larger 24-pin package. For applications requiring only 8 GPIO lines at 400 kHz I2C, TCA6408ARGTR saves approximately 30% board area while maintaining identical I2C interface behavior and 1.65 V to 5.5 V supply compatibility.
Can TCA6408ARGTR drive LEDs directly from its 8 output pins?
TCA6408ARGTR output pins can sink up to 25 mA per pin and source up to 10 mA per pin, enabling direct LED drive for low-current indicator LEDs without external driver transistors. For a status panel with 8 LEDs each drawing 10 mA, the device can drive all outputs simultaneously from a 3.3 V supply, simplifying circuit design in HMI and industrial indicator applications.
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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+ | $1.2600 | $1.26 |
| 100+ | $0.8100 | $81.00 |
| 250+ | $0.7800 | $195.00 |
| 341+ | $0.5250 | $179.03 |
| 1525+ | $0.4620 | $704.55 |
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