Semiconductor device with external terminals arranged symmetrically with respect to a normal external terminal arrangement
AssigneeElpida Memory, Inc.
InventorYukitoshi Hirose
Life of this patent
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Abstract
A semiconductor device, which may be changed to a mirror package after the assembly without having to reinstall bonding wires, comprises: a plurality of fixed external terminals which include a power supply external terminal and a ground potential external terminal and which are arranged symmetrically in fixed positions; a plurality of variable external terminals of different types which are arranged symmetrically; a plurality of reverse-polarity selection external terminals which are symmetrically arranged in fixed positions, and a signal switching circuit which switches the arrangement of the symmetrically arranged variable external terminal according to the setting of the selection terminal.
Claims24
A semiconductor device comprising:
- at least three sets of separate and distinct external terminals, said sets of external terminals comprising:
- a plurality of fixed external terminals arranged symmetrically to each other in fixed positions;
- a plurality of variable external terminals being different types and arranged symmetrically to each other;
- a plurality of selection external terminals arranged symmetrically to each other in fixed positions and set up to have a reverse polarity to each other;
- and
- a signal switching circuit that switches an arrangement of said variable external terminals arranged symmetrically to each other according to a setting of said selection external terminals,
- wherein said signal-switching circuit is provided inside a command decoder that analyzes a plurality of control signals.
A semiconductor device comprising:
- at least three sets of separate and distinct external terminals, said sets of external terminals comprising:
- a plurality of fixed external terminals arranged symmetrically to each other in fixed positions;
- a plurality of variable external terminals being different types and arranged symmetrically to each other;
- a plurality of selection external terminals arranged symmetrically to each other in fixed positions and set up to have a reverse polarity to each other;
- and
- a signal switching circuit that switches an arrangement of said variable external terminals arranged symmetrically to each other according to a setting of said selection external terminals,
- wherein said signal-switching circuit is provided inside an address decoder that analyzes a plurality of address signals of a memory.
A semiconductor device comprising:
- at least two sets of separate and distinct external terminals, said sets of external terminals comprising:
- a plurality of fixed external terminals arranged symmetrically to each other in fixed positions;
- a plurality of variable external terminals being different types and arranged symmetrically to each other;
- and
- a signal switching circuit that switches an arrangement of said variable external terminals arranged symmetrically to each other on the basis of an internal signal indicating a section of the device,
- wherein said signal-switching circuit is provided inside a command decoder that analyzes a plurality of control signals.
A semiconductor device comprising:
- at least two sets of separate and distinct external terminals, said sets of external terminals comprising:
- a plurality of fixed external terminals arranged symmetrically to each other in fixed positions;
- a plurality of variable external terminals being different types and arranged symmetrically to each other;
- and
- a signal switching circuit that switches an arrangement of said variable external terminals arranged symmetrically to each other on the basis of an internal signal indicating a selection of the device,
- wherein said signal-switching circuit is provided inside an address decoder that analyzes a plurality of address signals of a memory.
Dependencies are inferred from the claim text.