DP8228MJ-MIL ,System Controller and Bus DriverFeaturesoutputcomponentsofthe8080Amicrocomputerfamily.TheYSingle chip system controller and bus dri ..
DP8228N ,System Controller and Bus DriverFeaturesoutputcomponentsofthe8080Amicrocomputerfamily.TheYSingle chip system controller and bus dri ..
DP8303AN , 8-Bit TRI-STATE-R Bidirectional Transceiver (Inverting)
DP8303AN , 8-Bit TRI-STATE-R Bidirectional Transceiver (Inverting)
DP8303J , OCTAL THREE-STATE BIDIRECTIONAL BUS TRANSCEIVERS
DP8303J , OCTAL THREE-STATE BIDIRECTIONAL BUS TRANSCEIVERS
DS8880N ,High Voltage 7-Segment Decoder/DriverFeatureser switches a current sink on or off as prescribed by theYCurrent sink outputsinput code. E ..
DS88C120N ,Dual CMOS Compatible Differential Line Receiverapplications wherecontrolledriseand fall times and/or high Operation voltage rangee 4.5V to 15Vfreq ..
DS88C120N ,Dual CMOS Compatible Differential Line ReceiverFeaturesYFull compatibility with EIA Standards RS232-C, RS422The DS78C120 and DS88C120 are high per ..
DS88C20N ,Dual CMOS Compatible Differential Line ReceiverFeaturesn Meets requirements of EIA Standards RS-232-C RS-422The DS78C20 and DS88C20 are high perfo ..
DS8906N ,AM/FM Digital Phase-Locked Loop SynthesizerFeaturesclock signal for the external controller. Additional dividersYUses inexpensive 4 MHz refere ..
DS8908BN ,DS8908B AM/FM Digital Phase-Locked Loop Frequency SynthesizerDS8908BAM/FMDigitalPhase-LockedLoopFrequencySynthesizerJune1990DS8908BAM/FMDigitalPhase-LockedLoopF ..
DP8228MJ-MIL
System Controller and Bus Driver
TL/F/6825
DP8228/DP8228M/DP8238/DP8238M
System
Controller
and
Bus
Driver
December 1988
DP8228/DP8228M/DP8238/DP8238M
System Controller and Bus Driver
General Description
The DP8228/DP8228M, DP8238/DP8238M are system
controller/bus drivers containedina standard, 28-pin dual-
in-linepackage.Thechip, whichis fabricated using Schottky
Bipolar technology, generatesallthe readand write control
signals requiredto directly interfacethe memoryand input/
output componentsof the8080Amicrocomputer family.The
chip also provides driveand isolationforthe bidirectional
databusofthe 8080A microprocessor. Databus isolation
enablestheuseof slowermemoryand input/output compo-
nentsina system,and providesfor enhanced system noise
immunity. user-selected signal-level interrupt vector (RST7)ispro-
videdbythe deviceforuse inthe interrupt structureof small
systems that need only one basic vector.No additional
components (suchasan interrupt instruction port)arere-
quiredtousethe single interrupt vectorin these systems.
The devices alsogenerate anInterruptAcknowledge (INTA)
control signalfor each byteofa multibyte CALL instruction
whenan interruptis acknowledgedbythe 8080A. This fea-
ture permitstheuseofa multilevel priority interruptstructure large, interrupt-driven systems.
Features Single chip system controller andbus driverfor 8080A
Microcomputer Systems Allowsuseof multibyte CALL instructionsfor Interrupt
Acknowledge Provides user-selected single-level interrupt vector
(RST7) Provides isolationof databus Supportsa wide varietyof systembus structures Reduces system component count DP8238/DP8238M provides advanced Input/Output
Write and Memory Write control signalsfor large sys-
tem timing control
8080A Microcomputer Family Block Diagram
TL/F/6825–1
TRI-STATEÉ isaregistered trademarkof National SemiconductorCorporation.
C1995National SemiconductorCorporation RRD-B30M105/PrintedinU.S.A.
