Understand the difference.

Compare the meaning, drawing context and source references of two entries. A similar graphic or shared abbreviation does not establish equivalence.

COE

IEC

IEC common-output element

TI's public overview of IEEE Std 91 describes the common-output element as having a double line at its top. It sits beneath an array of identical elements and produces a single output that depends on all of them, such as a combined carry or an all-equal flag. It must carry its own general qualifier to say what function it performs.

Drawing use

Schematic

Application

Logic & signals

Reference family

IEC / Manufacturer

Form evidence

Element below an array with a double line at its top, carrying a general qualifier. Qualifying-symbol and dependency conventions as explained in TI's public overview of IEEE Std 91-1984, which incorporates IEC 617-12 work. Independent educational drawing; not certified IEC geometry or an IEC database identifier.

A distinction that matters

The common-control block has a notched outline at the top of an array and distributes inputs downwards; the common-output element collects results at the bottom.

Full referenceAdd to legend

CCB

IEC

IEC common-control block

TI's overview of IEEE Std 91 describes the common-control block as the only distinctively shaped outline used in the IEC system. It sits above an array of elements, and an input to it is an input to every element below unless dependency notation states otherwise. Clocks, clears and enables of multi-bit registers are typically drawn here.

Drawing use

Schematic

Application

Logic & signals

Reference family

IEC / Manufacturer

Form evidence

Notched block above an array of elements. Qualifying-symbol and dependency conventions as explained in TI's public overview of IEEE Std 91-1984, which incorporates IEC 617-12 work. Independent educational drawing; not certified IEC geometry or an IEC database identifier.

A distinction that matters

The common-output element has a double line and collects outputs below an array.

Full referenceAdd to legend

Original educational previews. Follow the source references on each full entry for the appropriate standard or selected product.