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UPB8228 - 8080A SYSTEM CONTROLLER AND BUS DRIVER

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BLOCK DIAGRAM PROCESSOR 03 DATA BUS SYSTEM DATA BUS vee@- GNO@-I STSTS(1) 572 MEMR MEMW IIOR I/OW I3USEN ~PB8228/8238 ABSOLUTE MAXIMUM RATINGS

Operating Temperature .

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Storage Temperature .

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Datasheet Details

Part number UPB8228
Manufacturer NEC
File Size 313.16 KB
Description 8080A SYSTEM CONTROLLER AND BUS DRIVER
Datasheet download datasheet UPB8228 Datasheet
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Full PDF Text Transcription

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NEe Microcomputers, Inc. fttIEC Jl,PB8228 J.I PB8238 8080A SYSTEM CONTROLLER AND BUS DRIVER OESCR IPTION The pPB8228/8238 is a single chip cOntroller and bus driver for 8080A based systems. All the required interface signals rrecessary to connect RAM, ROM and I/O components to a pPD8080A are generated. The pPB8228/8238 provides a bi·directional three·state bus driver for high TTL fan-out and isolation of the processor data bus from the system data bus for increased noise immunity. The system controller portion of the pPB8228/8238 consists of a status latch for definition of processor machine cycles and a gating array to decode this information for direct interface to system components.
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