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UPB8238 - 8080A SYSTEM CONTROLLER AND BUS DRIVER

Download the UPB8238 datasheet PDF. This datasheet also covers the UPB8228 variant, as both devices belong to the same 8080a system controller and bus driver family and are provided as variant models within a single manufacturer datasheet.

General Description

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 .

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (UPB8228-NEC.pdf) that lists specifications for multiple related part numbers.

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UPB8228 8080A SYSTEM CONTROLLER AND BUS DRIVER

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
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.