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8259A-2
8259, Programmable Interrupt Controller, PDIP-28
Schematic Symbol
Pin Configuration (28 pins)
| Pin | Name | Type |
|---|---|---|
| 1 | ~{CS} | input |
| 2 | ~{WR} | input |
| 3 | ~{RD} | input |
| 4 | D7 | bidirectional |
| 5 | D6 | bidirectional |
| 6 | D5 | bidirectional |
| 7 | D4 | bidirectional |
| 8 | D3 | bidirectional |
| 9 | D2 | bidirectional |
| 10 | D1 | bidirectional |
| 11 | D0 | bidirectional |
| 12 | CAS0 | input |
| 13 | CAS1 | output |
| 14 | GND | power_in |
| 15 | CAS2 | output |
| 16 | ~{SP}/~{EN} | bidirectional |
| 17 | INT | output |
| 18 | IR0 | input |
| 19 | IR1 | input |
| 20 | IR2 | input |
| 21 | IR3 | input |
| 22 | IR4 | input |
| 23 | IR5 | input |
| 24 | IR6 | input |
| 25 | IR7 | input |
| 26 | ~{INTA} | input |
| 27 | A0 | input |
| 28 | VCC | power_in |
Footprint
ConfirmedPackage_DIP/DIP-28_W15.24mm
Pad Layout
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
26
27
28
Pads (28)
| 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 |
| 25 | thru hole |
| 26 | thru hole |
| 27 | thru hole |
| 28 | thru hole |