Fairchild 100K
Developer	Fairchild
Manufacturer	Fairchild
Type	Discrete Logic
Introduction	1975 (launch)
Technology	ECL
Succession
←
10K

Fairchild 100K (F-100K) was a family of very high-speed discrete logic chips introduced by Fairchild Semiconductor in the mid-1970s. The 100K series was implemented using emitter-coupled logic (ECL) making those chips considerably faster than comparable Schottky TTL-based chips. Many early high-speed systems made use of those chips. The 100K family were an improved version of the 10K which was originally introduced by Motorola but was also manufactured by Fairchild.

Overview

In the mid-1970s Fairchild introduced the 100K which was an improved version of the original 10K family. 100K-based parts found their way into many early high-performance systems. For example, the Floating Point Systems FPS-264 64-bit floating-point co-processor which was introduced in February 1985 performed 4 to 5 times faster than its predecessor, FPS-164, by simply switching from to 100K ECL from Schottky TTL; this was all done without making any architectural changes and maintaining 100% software compatibility.

Members

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Systems

• 1985: Floating Point Systems FPS-264 FP Coprocessor
• 1981: Control Data Corporation Cyber 205 used 100K series chips for its microcode memory logic boards

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