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8253
Programmable Interval Timer, PDIP-24
Schematic Symbol
Pin Configuration (24 pins)
| Pin | Name | Type |
|---|---|---|
| 1 | D7 | bidirectional |
| 2 | D6 | bidirectional |
| 3 | D5 | bidirectional |
| 4 | D4 | bidirectional |
| 5 | D3 | bidirectional |
| 6 | D2 | bidirectional |
| 7 | D1 | bidirectional |
| 8 | D0 | bidirectional |
| 9 | CLK0 | input |
| 10 | OUT0 | output |
| 11 | G0 | input |
| 12 | GND | power_in |
| 13 | OUT1 | output |
| 14 | G1 | input |
| 15 | CLK1 | input |
| 16 | G2 | input |
| 17 | OUT2 | output |
| 18 | CLK2 | input |
| 19 | A0 | input |
| 20 | A1 | input |
| 21 | ~{CS} | input |
| 22 | ~{RD} | input |
| 23 | ~{WR} | input |
| 24 | VCC | power_in |
Footprint
ConfirmedPackage_DIP/DIP-24_W15.24mm
Pad Layout
1
2
3
4
5
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7
8
9
10
11
12
13
14
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17
18
19
20
21
22
23
24
Pads (24)
| Number | Type |
|---|---|
| 1 | thru hole |
| 2 | thru hole |
| 3 | thru hole |
| 4 | thru hole |
| 5 | thru hole |
| 6 | thru hole |
| 7 | thru hole |
| 8 | thru hole |
| 9 | thru hole |
| 10 | thru hole |
| 11 | thru hole |
| 12 | thru hole |
| 13 | thru hole |
| 14 | thru hole |
| 15 | thru hole |
| 16 | thru hole |
| 17 | thru hole |
| 18 | thru hole |
| 19 | thru hole |
| 20 | thru hole |
| 21 | thru hole |
| 22 | thru hole |
| 23 | thru hole |
| 24 | thru hole |