All Sections Fairchild

1. SCR topology transmogrifies into BJT two-wire precision current source
   Stephen Woodward
   Circuits Fairchild LM317
   Recently, frequent Design Idea (DI) author Christopher Paul showcased an innovative and high performance true-two-wire current source using a depletion mode MOSFET as the pass device in “A precision, voltage-compliant current source” ( ...
   Jan 15, 2026
2. 74AC169SC — Datasheet Fairchild
   Datasheets Fairchild 74AC169SC
   4-Stage Synchronous Bidirectional Counter The AC169 is fully synchronous 4-stage up/down counter. The AC169 is a modulo-16 binary counter. It features a preset capability for programmable operation, carry lookahead for easy cascading and a U/D ...
   Oct 13, 2025

3. 74AC169SJ — Datasheet Fairchild
   Datasheets Fairchild 74AC169SJ
   4-Stage Synchronous Bidirectional Counter The AC169 is fully synchronous 4-stage up/down counter. The AC169 is a modulo-16 binary counter. It features a preset capability for programmable operation, carry lookahead for easy cascading and a U/D ...
   Oct 13, 2025
4. 74AC169MTC — Datasheet Fairchild
   Datasheets Fairchild 74AC169MTC
   4-Stage Synchronous Bidirectional Counter The AC169 is fully synchronous 4-stage up/down counter. The AC169 is a modulo-16 binary counter. It features a preset capability for programmable operation, carry lookahead for easy cascading and a U/D ...
   Oct 13, 2025
5. 74AC169PC — Datasheet Fairchild
   Datasheets Fairchild 74AC169PC
   4-Stage Synchronous Bidirectional Counter The AC169 is fully synchronous 4-stage up/down counter. The AC169 is a modulo-16 binary counter. It features a preset capability for programmable operation, carry lookahead for easy cascading and a U/D ...
   Oct 13, 2025
6. 74AC169 — Datasheet Fairchild
   Datasheets Fairchild
   4-Stage Synchronous Bidirectional Counter The AC169 is fully synchronous 4-stage up/down counter. The AC169 is a modulo-16 binary counter. It features a preset capability for programmable operation, carry lookahead for easy cascading and a U/D ...
   Oct 13, 2025
7. Unusual 2N3904 transistor circuit
   Michael Wyatt
   Articles Fairchild 2N3904
   A Planet Analog article, “2N3904: Why use a 60-year-old transistor?” ( Ref. 1 ) by Bill Schweber, inspired some interest in this old transistor and how it’s commonly used, and if any uncommon uses might exist. Here’s one we ...
   Sep 28, 2025
8. J202 — Datasheet Fairchild
   Datasheets Fairchild J202
   

   N-Channel General Purpose Amplifier in TO-92 Package
   Aug 26, 2025
9. J201 — Datasheet Fairchild
   Datasheets Fairchild J201
   

   N-Channel General Purpose Amplifier in TO-92 Package
   Aug 26, 2025
10. MMBFJ202 — Datasheet Fairchild
    Datasheets Fairchild MMBFJ202
    

    N-Channel General Purpose Amplifier in SOT-23 Package
    Aug 26, 2025

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