Understand the difference.

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

BCD/7SEG

IEC

IEC BCD-to-seven-segment decoder

The BCD-to-seven-segment decoder is an X/Y coder with the qualifier BCD/7SEG, sometimes written BCD/7-SEG. Inputs are weighted 1, 2, 4 and 8 and outputs are labelled a to g for the display segments. Many devices add lamp test and blanking inputs shown with their own labels.

Drawing use

Schematic

Application

Logic & signals

Reference family

IEC / Manufacturer

Form evidence

X/Y coder with BCD/7SEG qualifier and segment outputs a to g. 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

A BIN/OCT decoder activates one output per code; this coder activates a pattern of segments.

Full referenceAdd to legend

CTR DIV10

IEC

IEC decade counter (CTR DIV10)

CTR DIVm identifies a counter whose cycle length is m. A decade counter is therefore CTR DIV10, with outputs weighted 1, 2, 4 and 8 for a BCD count from 0 to 9. The carry output is often marked CT=9 to show it is active at the last state.

Drawing use

Schematic

Application

Logic & signals

Reference family

IEC / Manufacturer

Form evidence

Rectangular element with the CTR DIVm qualifier, m = 10. 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 decoded decade counter has ten one-hot outputs rather than BCD-weighted outputs.

Full referenceAdd to legend

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