155-0078-00
The 155-0078-xx (chip designation M84) is a Tek-made broadband vertical amplifier integrated circuit in a minipac package. The input and output are differential. The 155-0078 was designed by John Addis for the 485 scope (Note 1), which uses no less than 18 of these chips in various grades.
| SUFFIX | SPEED | DC CHARACTERISTICS | REPLACEABLE BY |
|---|---|---|---|
| 00 | Fast | Best | ---- |
| 01 | Fast | Third best | -03,-00 |
| 02 | Fast | Most relaxed | -01,-03,-00 |
| 03 | Fast | Second best | -00 |
| 04 | Slow | Same as -00 | -00 |
| 05 | Slow | Same as -01 | -03,-00,-07,-04 |
| 06 | Slow | Same as -02 | -01,-03,-00,-05,-07,-04 |
| 07 | Slow | Same as -03 | -00,-04 |
| 10 | Fast | Best | ---- |
| 11 | Fast | Third best | -13,-10 |
| 12 | Fast | Most relaxed | -11,-13,-10 |
| 13 | Fast | Second best | -10 |
| Sometimes an instrument will contain a better grade of part than called for in the manual.
The manual should be consulted for the correct replacement type. | |||
Furthermore, it also comes in 14-pin DIP, as 155-0273-00 and 155-0274-00 (slower grade).
Pictures
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Excerpt from 067-0587-01 schematic, showing application of 155-0078-00.
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155-0078-01 amplifiers in 7A26. Note symmetric layout.
Used in
- 475 (U140, U240, U450)
- 485
- 7834, 7844 (U415,U515)
- 7854 (A13U520,A13U590,A13U620,A13U680)
- 7904, 7903 (U5510,U5530,U5550,U5610,U5630,U5650)
- 7A16A, 7A16P
- 7A24, 7A26 (U1350,U1450,U1550,U1750,U2350,U2450,U2550,U2750)
- 067-0587-01
Notes
- Note 1: See John Addis quote in 7A11 article