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PCA9539xBS
16-bit I/O expander, I2C / SMBus interface, interrupt and reset pins, VQFN-24
Schematic Symbol
Pin Configuration (25 pins)
| Pin | Name | Type |
|---|---|---|
| 1 | IO0_0 | bidirectional |
| 2 | IO0_1 | bidirectional |
| 3 | IO0_2 | bidirectional |
| 4 | IO0_3 | bidirectional |
| 5 | IO0_4 | bidirectional |
| 6 | IO0_5 | bidirectional |
| 7 | IO0_6 | bidirectional |
| 8 | IO0_7 | bidirectional |
| 9 | V_{SS} | power_in |
| 10 | IO1_0 | bidirectional |
| 11 | IO1_1 | bidirectional |
| 12 | IO1_2 | bidirectional |
| 13 | IO1_3 | bidirectional |
| 14 | IO1_4 | bidirectional |
| 15 | IO1_5 | bidirectional |
| 16 | IO1_6 | bidirectional |
| 17 | IO1_7 | bidirectional |
| 18 | A0 | input |
| 19 | SCL | input |
| 20 | SDA | bidirectional |
| 21 | V_{DD} | power_in |
| 22 | ~{INT} | open_collector |
| 23 | A1 | input |
| 24 | ~{RESET} | input |
| 25 | V_{SS} | passive |
Footprint
ConfirmedPackage_DFN_QFN/HVQFN-24-1EP_4x4mm_P0.5mm_EP2.1x2.1mm
Pad Layout
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1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Pads (34)
| Number | Type |
|---|---|
| — | smd |
| — | smd |
| — | smd |
| — | smd |
| — | smd |
| — | 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 |