74154 4-To-16 Line Decoder/Demultiplexer

Spec Sheet
74154%20Fairch%20real%20pre NTI%20A1

Fairchild

From a photo of a real pre-NTI Apple-1.
74154 PC F, black plastic.
7604 date code.
Total # on board: 1.

74154%20Sig%20real%20NTI%20A1

Signetics

From a photo of a real NTI Apple-1.
Vertical labeling, black plastic, stretched “S” logo, additional S below part number. 7529 date code. 
Total # on board: 1.

74154%20TI%20real%20proto%20A1

Texas Instruments

From a photo of a real prototype Apple-1.
SN74154N, black plastic, 7410 date code.

74154%20Fairch%207632

Fairchild

74154 PC F, black plastic. 7632 date code. Close date code and exact labeling match to the real Apple-1. On my Mimeo replica.

74154%20Sig%207545

Signetics

Vertical labeling, black plastic, stretched “S” logo, no added S. 7545 date code.

74154%20Sig%207605%20with%20S

Signetics

Vertical labeling, black plastic, stretched “S” logo, added S. 7605 date code.

74154%20TI%207632

Texas Instruments

SN74154N, black plastic, 7632 date code.

74154%20NS%20716%20glossy

National Semi

DM74154N 9311, black plastic, newer NS logo. 716 date code.

74154%20NS%2074%2076

National Semi

DM74154N, black plastic, 447 and 611 date codes.