Sprague - 2N1499A - Transistor, PNP. Germanium high speed switch 150MHz.
Sprague - 2N1499A Transistor, PNP. Germanium high speed switch 150MHz.
In May 1960, Philco registered several new high frequency transistors with JEDEC. This was a
very active time for Philco, which was rapidly expanding its lead in commercial switching transistors with new
MADT types. The Philco tentative data sheet for the 2N1499 reads in part: “The 2N1499 is a hermetically
sealed, germanium Micro Alloy Diffused-base Transistor (MADT) designed for use in saturated switching
circuits. The 2N1499 is capable of switching at frequencies in excess of 5 megacycles. It is intended to be
used in high-speed commercial computers, data processing and automation equipment. The very thin base
width of the 2N1499 makes it exceptionally radiation resistant. The TO-9 package is cold welded for high
reliability”. Philco soon offered an improved version of this transistor, designated 2N1499A, which doubled
the original switching speed, from 5MC to 10 MC. The 2N1499A was marketed as a “high-speed, low-cost
switch”. The Sprague version of the 2N1499A included in this kit is dated from the late 1960s.
Max voltage: 20VCEO, 30VCES.
Max current: 100mA.
Dissipation: 50mW.
Package: TO-9 long gold leads (TO-5).
Note: MADT Germanium high speed switch 150MHz.
| SKU | 8368 |
|---|---|
| Condition | NS - NEW SURPLUS |
| Part Number | 2N1499A |
| Alternative Part Number | ECG126A |
Sprague - 2N1499A Transistor, PNP. Germanium high speed switch 150MHz.
In May 1960, Philco registered several new high frequency transistors with JEDEC. This was a
very active time for Philco, which was rapidly expanding its lead in commercial switching transistors with new
MADT types. The Philco tentative data sheet for the 2N1499 reads in part: “The 2N1499 is a hermetically
sealed, germanium Micro Alloy Diffused-base Transistor (MADT) designed for use in saturated switching
circuits. The 2N1499 is capable of switching at frequencies in excess of 5 megacycles. It is intended to be
used in high-speed commercial computers, data processing and automation equipment. The very thin base
width of the 2N1499 makes it exceptionally radiation resistant. The TO-9 package is cold welded for high
reliability”. Philco soon offered an improved version of this transistor, designated 2N1499A, which doubled
the original switching speed, from 5MC to 10 MC. The 2N1499A was marketed as a “high-speed, low-cost
switch”. The Sprague version of the 2N1499A included in this kit is dated from the late 1960s.
Max voltage: 20VCEO, 30VCES.
Max current: 100mA.
Dissipation: 50mW.
Package: TO-9 long gold leads (TO-5).
Note: MADT Germanium high speed switch 150MHz.
