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MCP23S18x-x-SO
16-bit I/O expander, SPI interface, open-drain outpus (with configurable pull-up resistors), 2 interrupt outputs, SOIC-28
Schematic Symbol
Pin Configuration (28 pins)
| Pin | Name | Type |
|---|---|---|
| 1 | V_{SS} | power_in |
| 2 | NC | no_connect |
| 3 | GPB0 | bidirectional |
| 4 | GPB1 | bidirectional |
| 5 | GPB2 | bidirectional |
| 6 | GPB3 | bidirectional |
| 7 | GPB4 | bidirectional |
| 8 | GPB5 | bidirectional |
| 9 | GPB6 | bidirectional |
| 10 | GPB7 | bidirectional |
| 11 | V_{DD} | power_in |
| 12 | ~{CS} | input |
| 13 | SCK | input |
| 14 | SI | input |
| 15 | SO | output |
| 16 | ~{RESET} | input |
| 17 | NC | no_connect |
| 18 | INTB | output |
| 19 | INTA | output |
| 20 | GPA0 | bidirectional |
| 21 | GPA1 | bidirectional |
| 22 | GPA2 | bidirectional |
| 23 | GPA3 | bidirectional |
| 24 | GPA4 | bidirectional |
| 25 | GPA5 | bidirectional |
| 26 | GPA6 | bidirectional |
| 27 | GPA7 | bidirectional |
| 28 | NC | no_connect |
Footprint
ConfirmedPackage_SO/SOIC-28W_7.5x17.9mm_P1.27mm
Pad Layout
1
2
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4
5
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7
8
9
10
11
12
13
14
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16
17
18
19
20
21
22
23
24
25
26
27
28
Pads (28)
| Number | Type |
|---|---|
| 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 |
| 26 | smd |
| 27 | smd |
| 28 | smd |