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DP8308N
8-Bit TRI-STATE Bidirectional Transceiver (Non-Inverting)
TL/F/8795
DP8308
8-Bit
TRI-STATE
Bidirectional
Transceiver
(Non-Inverting)
February 1996
DP8308 8-Bit TRI-STATEÉ
Bidirectional Transceiver (Non-Inverting)
General Description
The DP8308isa high speed Schottky 8-bit TRI-STATEbidi-
rectional transceiver designedto provide bidirectional drive
forbus oriented microprocessorand digital communications
systems.Itis capableof sinking16mAontheA portsandmAontheB ports (bus ports). PNP inputsforlow input
current andan increased output high (VOH)level allow com-
patibility with MOS, CMOS, and other technologies that
havea higher thresholdandless drive capabilities.In addi-
tion,it features glitch-free power up/downontheB port
preventing erroneous glitchesonthe systembusin poweror down.
DP8308is featured with Transmit(T) and Receive(R)
control inputs.
Features 8-bit bidirectional data flow reduces system package
count Bidirectional TRI-STATE inputs/outputs interface with
bus oriented systems PNP inputs reduce input loading Output high voltage interfaces with TTL, MOS, and
CMOS48 mA/300pFbus drive capability Pinouts simplify system interconnections IndependentTandR controlsfor versatility Compact 20-pin dual-in-line package Bus port glitch free power up/down
Logic and Connection Diagrams
TL/F/8795–1
Dual-In-Line Package
TL/F/8795–2
TopView
OrderNumber DP8308N
SeeNS Package Number N20A
Logic Table
ControlInputs Resulting Conditions
Transmit Receive A Port B Port 0 OUT IN 1 IN OUT 1 TRI-STATE TRI-STATE 0 Both Active*
*Thisis notan intended logicconditionandmay cause oscillations.
TRI-STATEÉ isaregistered trademarkof National SemiconductorCorp.
C1996National SemiconductorCorporation RRD-B30M36/Printed inU.S.A. http://
