YINGHUA TCA8418RTWR 16-bit I2C SMBus I/O expander QFN24 semiconductor
16-bit I/O expander with I2C and SMBus interface in a QFN24 package
- Product typeICs Semicoductors
- 16-bit I/O expansion via I2C and SMBus
- Low-voltage operation reduces power draw
- QFN24 package suits compact PCB layouts
- 16 GPIO lines controlled from a single address
16-bit I/O expander for I2C SMBus designs
The YINGHUA TCA8418RTWR provides 16 general-purpose I/O lines over an I2C and SMBus interface. It targets engineers adding keypad scanning or GPIO expansion to low-voltage embedded systems. The QFN24 package suits dense PCB layouts where pin count is limited.
QFN24 package dictates board integration
The 24-pin QFN footprint fixes the land pattern and thermal pad requirements for assembly. Designs that cannot accommodate this package must select a different expander. Verify the PCB stack-up and reflow profile match the QFN24 outline before committing.
How it compares
Measured against everything we stock in Encoders & Semiconductor Parts, at today’s prices. Recalculated every night.
- Price $15.99
- Cheaper than about 80% of the 1,027 comparable items (median $34.99).
Specifications
| Product | |
|---|---|
| Product type | ICs Semicoductors |
Questions about this item
What does the 16-bit I/O count mean when the expander is soldered onto a board?
It provides sixteen programmable input or output pins that can be read or written over the serial bus, adding general-purpose I/O without using additional microcontroller ports.
How do the I2C and SMBus interfaces limit the expander in practice?
The part communicates on both I2C and SMBus, so its maximum transaction speed follows whichever bus standard the host controller enforces.
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