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Texas Instruments TCA6408APWR — Logic ICs

TCA6408APWR I²C I/O Expander, 8-Bit, 1.65V–5.5V, 16-TSSOP

MPNTCA6408APWR
End of Life

Texas Instruments TCA6408APWR, 8-bit I²C/SMBus I/O expander, 400 kHz clock, push-pull outputs, 1.65 V–5.5 V supply, -40°C to 85°C, 16-TSSOP package.

$1.58Ref. price · indicative, final on quote
Packaging16-TSSOP (0.173", 4.40mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

TCA6408APWR specifications
ParameterValue
Output typePush-Pull
MountingSurface Mount
Supply voltage1.65V ~ 5.5V
Current - output source (Sink)10mA, 25mA
Clock frequency400 kHz
InterfaceI²C, SMBus
Operating temperature-40°C ~ 85°C
PackageTape & Reel (TR); Cut Tape (CT)
FeaturesPOR
Number of i (O)8
Case16-TSSOP (0.173\", 4.40mm Width)
Interrupt outputYes

Product details

8-bit I²C GPIO expander with POR and interrupt

It provides eight push-pull output or input pins, a power-on reset (POR) feature that initializes the outputs to a known state, and a dedicated interrupt output that signals the host when an input changes. The 400 kHz I²C clock is standard for this class of expander and matches most MCU I²C peripherals.

The POR feature means the outputs come up in a defined state after power-on, which avoids glitches on connected loads during startup.

TI lists the TCA6408APWR as Active. The part is ROHS3 compliant.

Frequently asked questions

Does TCA6408APWR have an interrupt output?

Yes, it has a dedicated interrupt output that asserts when any input pin changes state, allowing the host MCU to sleep until an event occurs.

What is the TCA6408APWR equivalent or replacement?

For a direct 8-bit push-pull replacement, stay within the TCA6408A family.