Datasheet Details
Part number:
UPB8238, UPB8228
Manufacturer:
NEC
File Size:
313.16 KB
Description:
8080a system controller and bus driver.
Note:
This datasheet PDF includes multiple part numbers: UPB8238, UPB8228.
Please refer to the document for exact specifications by model.
UPB8238, UPB8228, 8080A SYSTEM CONTROLLER AND BUS DRIVER
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 .
_ .
Storage Temperature .
All Output or Supply Voltages ..
.
All Input Voltages .
Output Currents O°C to +70
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.
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