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TCA9555RTWR
16-bit I/O expander, I2C and SMBus interface, interrupts, w/ pull-ups, QFN-24
Schematic Symbol
Pin Configuration (25 pins)
| Pin | Name | Type |
|---|---|---|
| 1 | P00 | bidirectional |
| 2 | P01 | bidirectional |
| 3 | P02 | bidirectional |
| 4 | P03 | bidirectional |
| 5 | P04 | bidirectional |
| 6 | P05 | bidirectional |
| 7 | P06 | bidirectional |
| 8 | P07 | bidirectional |
| 9 | GND | power_in |
| 10 | P10 | bidirectional |
| 11 | P11 | bidirectional |
| 12 | P12 | bidirectional |
| 13 | P13 | bidirectional |
| 14 | P14 | bidirectional |
| 15 | P15 | bidirectional |
| 16 | P16 | bidirectional |
| 17 | P17 | bidirectional |
| 18 | A0 | input |
| 19 | SCL | input |
| 20 | SDA | bidirectional |
| 21 | VCC | power_in |
| 22 | ~{INT} | open_collector |
| 23 | A1 | input |
| 24 | A2 | input |
| 25 | EPAD | input |
Footprint
ConfirmedPackage_DFN_QFN/WQFN-24-1EP_4x4mm_P0.5mm_EP2.45x2.45mm
Pad Layout
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2
3
4
5
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15
16
17
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19
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24
25
Pads (29)
| Number | Type |
|---|---|
| — | smd |
| — | smd |
| — | smd |
| — | smd |
| 1 | smd |
| 2 | smd |
| 3 | smd |
| 4 | smd |
| 5 | smd |
| 6 | smd |
| 7 | smd |
| 8 | smd |
| 9 | smd |
| 10 | smd |
| 11 | smd |
| 12 | smd |
| 13 | smd |
| 14 | smd |
| 15 | smd |
| 16 | smd |
| 17 | smd |
| 18 | smd |
| 19 | smd |
| 20 | smd |
| 21 | smd |
| 22 | smd |
| 23 | smd |
| 24 | smd |
| 25 | smd |