The decoder chip above works. It replaces 1/4 of the 74139 for the Z88 design.
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| Part No | Chip | Manufacture | Speed nS | Package | Price | |||
|---|---|---|---|---|---|---|---|---|
| Min | Typ | Max | ||||||
| 1741279 | SN74LVC2G32QDCURQ1 | Ti | <2.5 | SM8 | $ 0.55 | |||
| SN74LVC1G139DCUT | Ti / Farnell | <2.5 | VSSOP | £0.404 | ||||
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This chip provides the logic for the /CE signal.
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| View file | ||||||
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All the components required cannot be fitted on a single card. The design has been split onto two cards. The first PCB is just for the Z88.
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