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82C54_PLCC
CHMOS Programmable Interval Timer, PLCC-28
Schematic Symbol
Pin Configuration (28 pins)
| Pin | Name | Type |
|---|---|---|
| 1 | NC | no_connect |
| 2 | D7 | bidirectional |
| 3 | D6 | bidirectional |
| 4 | D5 | bidirectional |
| 5 | D4 | bidirectional |
| 6 | D3 | bidirectional |
| 7 | D2 | bidirectional |
| 8 | D1 | bidirectional |
| 9 | D0 | bidirectional |
| 10 | CLK0 | input |
| 11 | NC | no_connect |
| 12 | OUT0 | output |
| 13 | G0 | input |
| 14 | GND | power_in |
| 15 | NC | no_connect |
| 16 | OUT1 | output |
| 17 | G1 | input |
| 18 | CLK1 | input |
| 19 | G2 | input |
| 20 | OUT2 | output |
| 21 | CLK2 | input |
| 22 | A0 | input |
| 23 | A1 | input |
| 24 | ~{CS} | input |
| 25 | NC | no_connect |
| 26 | ~{RD} | input |
| 27 | ~{WR} | input |
| 28 | VCC | power_in |
Footprint
ConfirmedPackage_LCC/PLCC-28
Pad Layout
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5
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7
8
9
10
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12
13
14
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16
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18
19
20
21
22
23
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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 |