SMTD994

The SMTD994  (P/N 152-0177-01) is a 10 mA, 2 pF tunnel diode in a DO-17 package. Based on the diode data the Toshiba/NEC 1S2199 is equivalent.

It is similar to the 152-0177-02, but has a 1 mA tolerance on Ip, while the 152-0177-02 has a 0.5 mA tolerance on Ip. The 152-0177-01 offers lower capacitance than the 152-0177-00.

Used in

Some instruments using part SMTD994

Instrument Manufacturer Class Model Description Introduced
067-0587-01 Tektronix Plug-in 067-0587-01 7000 Series Calibration Fixture (?)
3T5 Tektronix Plug-in 3T5 Programmable sampling sweep plug-in 1969
3T6 Tektronix Plug-in 3T6 Programmable sampling sweep plug-in 1969
485 Tektronix Oscilloscope 485 350 MHz portable scope 1972
5S14N Tektronix Plug-in 5S14N 1 GHz dual-trace, delayed-sweep sampler 1974
7D14 Tektronix Plug-in 7D14 525 MHz frequency counter 1970
7T11 Tektronix Plug-in 7T11 Sampling Sweep Unit 1969
7T11A Tektronix Plug-in 7T11 Sampling Sweep Unit 1986
S-53 Tektronix Plug-in S-53 Trigger Recognizer 1971