TRANSISTOR MUSEUM™

Historic Transistor Photo Gallery   

 

Transistor Size (1/4”OD)

No Date Code  

 

TI Cardboard “Match Cover” Style Packaging

 

TEXAS INSTRUMENTS

TIXM10

 

TYPE

Germanium PNP Epitaxial Planar

 

USAGE

High Frequency Radio

 

DATE INTRODUCED

Mid 1960s

 

CASE STYLES

Plastic Compound

 

 AVAILABILITY

Rare (Low Volume Production)

HISTORIC NOTES

By the mid 1960s, Texas Instruments had become a dominant semiconductor company and was developing world class products of all major types, including silicon transistors and integrated circuits.  Germanium devices were still viable in a few applications, primarily high frequency and low cost.  TI, along with most other major transistor manufacturers, offered germanium transistors which achieved excellent high frequency performance due to very thin base regions made possible with diffusion and epitaxial manufacturing processes. Inexpensive plastic packaging was becoming available, which allowed for very low cost final products.  The TIXM10 was one of a series of preproduction types which offered exceptional high frequency performance (up to 900MHz) at very low cost (.92 ea in the March 1967 TI OEM Price List).  THE TIXM label was a proprietary TI labeling style, with “X” = Preliminary Device without extensive reliability data, and the “M” = Mesa or Planar type.  No case markings were typically used on these preliminary devices, except paint dot color code identifiers.  In this case the brown and black dots represent a “10” color code (TIXM”10”).  It is likely that TI transitioned this type to a standard “2N” number after the preliminary performance had been determined to be adequate for high volume production.   

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