Twin T Drums (Practical Electronics 1978)

Compare and contrast: CD4011A (from the RCA COS/MOS book linked earlier):

image

Texas Instruments CD4011B (inputs and outputs are buffered, as per JEDEC standards):

Texas Instruments CD4011UB (unbuffered):

(that’s the same drawing as in the RCA handbook :slight_smile: TI got it from RCA, via GE and Harris).

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