4N25
Optocoupler.
+---+--+---+
A |1 +--+ 6| B
K |2 4N25 5| C
|3 4| E
+----------+

CNY74-2
Dual optocouplers.
+---+--+---+
1A |1 +--+ 8| 1E
1K |2 CNY 7| 1C
2K |3 74-2 6| 2C
2A |4 5| 2E
+----------+

CNY74-4
Quad optocouplers.
+---+--+---+
1A |1 +--+ 16| 1E
1K |2 15| 1C
2K |3 14| 2C
2A |4 CNY 13| 2E
3A |5 74-4 12| 3E
3K |6 11| 3C
4K |7 10| 4C
4A |8 9| 4E
+----------+

HDSP-4401, HDSP-M401, HDSP-4501, HDSP-5101
Common row anode 5x7 dot matrix LED display.
+-----+--+-----+
Col1 |1 +--+ 18| Row1
| |
Row3 |3 16| Row2
Col2 |4 15| Col4
| 5x7 LED |
Row5 |6 matrix 13| Row4
| |
Row6 |8 11| Col5
Row7 |9 10| Col3
+--------------+

HDSP-4403, HDSP-M403, HDSP-4503, HDSP-5103
Common row cathode 5x7 dot matrix LED display.
+-----+--+-----+
Row1 |1 +--+ 18| Col5
| |
Col3 |3 16| Row2
Row3 |4 15| Row4
| 5x7 LED |
Col1 |6 matrix 13| Row5
| |
Col2 |8 11| Col4
Row7 |9 10| Row6
+--------------+

HDSP-4701, HDSP-L101, HDSP-L201, HDSP-5401, TC07-11
Common row anode 5x7 dot matrix LED display.
+---+--+---+
Col1 |1 +--+ 12| Row1
Row3 |2 11| Row2
Col2 |3 5x7 10| Col3
Row5 |4 LED 9| Row4
Row6 |5 8| Col5
Row7 |6 7| Col4
+----------+

HDSP-4703, HDSP-L103, HDSP-L203, HDSP-5403
Common row cathode 5x7 dot matrix LED display.
+---+--+---+
Row1 |1 +--+ 12| Col5
Row2 |2 11| Row3
Col2 |3 5x7 10| Row4
Col1 |4 LED 9| Col4
Row6 |5 8| Row5
Row7 |6 7| Col3
+----------+

MOC5010
Linear amplifier optocoupler.
+---+--+---+
A |1 +--+ 6| VCC
K |2 5010 5| GND
|3 4| OUT
+----------+

6N135
Optocoupler with IR diode and transistor output configuration.
+---+--+---+
|1 +--+ 8| VCC
A |2 7| B
K |3 6N135 6| C
|4 5| E
+----------+

6N138, 6N139
Optocoupler with IR diode and darlington transistor output configuration.
+---+--+---+
|1 +--+ 8| VCC
A |2 7| B
K |3 6N138 6| C
|4 5| GND
+----------+

MCT9001
Dual optocouplers.
+---+--+---+
1A |1 +--+ 8| 1C
1K |2 MCT 7| 1E
2A |3 9001 6| 2C
2K |4 5| 2E
+----------+