AY-3-8900

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General Instrument Standard Television Interface Chip

       +-----+--+-----+
   Vss |1    +--+   40| Vbb
   SR3 |2           39| Y2
  DWS' |3           38| Y1
  DTB' |4           37| Y0
  BAR' |5           36| SD0
   BC2 |6           35| SD1
   BC1 |7           34| SD2
  BDIR |8           33| SD3
   SR1 |9   AY-3-   32| SD4
    O1 |10    8900  31| SD5
    O2 |11          30| SD6
   SR2 |12          29| SD7
/MSYNC |13          28| SD8
 RSTIN |14          27| SD9
 Clock |15          26| SD10
    V4 |16          25| SD11
   Vss |17          24| SD12
    V3 |18          23| SD13
    V5 |19          22| V1
   Vcc |20          21| V2
       +--------------+

Vss: 0v
Vcc: +4.85v - 5.15v
Vbb: -3.3v

Datasheet

GI AY-3-8900