DS3686 ,Dual Positive Voltage Relay Driverapplicationstransistor protection.The outputs are Darlington connected transistors, which al-low hi ..
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DS3691M ,RS-422/RS-423 Line Drivers With TRI-STATE Outputsfeatures 4 buffered outputs• TRI-STATE Outputs in RS-422 Modewith high source and sink current capa ..
DS3691MX ,RS-422/RS-423 Line Drivers With TRI-STATE OutputsElectrical Characteristics” provide conditions for actual device operation.Note3: Unless otherwise ..
DS3691N ,RS-422/RS-423 Line Drivers With TRI-STATE OutputsFeaturesn Dual RS-422 line driver with mode pin low, or quadThe DS1691A/DS3691 are low power Schott ..
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EC103D1 ,SCR
EC103D1 ,SCR
EC103D1 ,SCR
EC2-12NU ,COMPACT AND LIGHTWEIGHT, SMALL MOUNTING SIZE, HIGH BREAKDOWN VOLTAGE
EC2-24 ,COMPACT AND LIGHTWEIGHT, SMALL MOUNTING SIZE, HIGH BREAKDOWN VOLTAGE
EC2-24NU ,COMPACT AND LIGHTWEIGHT, SMALL MOUNTING SIZE, HIGH BREAKDOWN VOLTAGE
DS3686
Dual Positive Voltage Relay Driver
TL/F/5822
DS3686
Dual
Positive
Voltage
Relay
Driver
April 1990
DS3686 Dual Positive Voltage Relay Driver
General Description
The DS3686isa high voltage/current positive voltage relay
driver having many featuresnot availablein present relay
drivers.
PNP inputs provide both TTL/LS compatibility and highin-
put impedanceforlow input loading.
Output leakageis specified over temperatureatan output
voltage of54V.Minimum output breakdown (ac/latch break-
down)is specified over temperatureat5 mA. This clearly
definesthe actual breakdownofthe device sincethe circuit
has incorporatedinitan internal reference which doesnot
allow output breakdown latching foundin existing relay driv-
ers. Additionally, this internal reference circuit featurewill
eliminatethe needin most casesofan external clamping
(inductive transient voltage protection) diode. When theout-
putis turned ‘‘OFF’’by input logic conditionsthe resulting
inductive voltage transient seen atthe outputis detectedby internal zener reference.The reference then momentari- activatesthe output transistor long enoughso thatthe
relay energyis discharged. This feature eliminatesthe need external circuit protection componentsand insures output
transistor protection.
The outputsare Darlington connected transistors, whichal-
low high current operationat low internal VCC current
levelsÐbase driveforthe output transistoris obtained from
the loadin proportiontothe required loading conditions.
Typical VCC power with both outputs ‘‘ON’’is90 mW.
The circuit also features output transistor protectionifthe
VCC supplyislostby forcingthe outputintothe high imped-
ance ‘‘OFF’’ state withthe same breakdown levelsas when
VCC was applied.
Features TTL/LS/CMOS compatible inputs High impedance inputs (PNP’s) High output voltage breakdown (65Vtyp) High output current capability (300mA max) Internal protection circuit eliminates needfor output
protection diode Output breakdown protectionif VCC supplyislost Low VCC power dissipation(90 mW (typ) both outputs
‘‘ON’’) Voltage and current levels compatiblefor usein tele-
phone relay applications
Connection Diagrams
Metal Can Package
TL/F/5822–1
Top View
Pin4isin electrical contactwiththecase
Order NumberDS3686H
SeeNS Package Number H08C
Truth Table
Positivelogic:ABeX B OutputX 1 1 1 0
Logic‘‘0’’ output ‘‘ON’’
Logic‘‘1’’ output ‘‘OFF’’
Dual-In-Line Package
TL/F/5822–2
TopView
Order Number DS3686J-8 orDS3686N
See NSPackageNumber J08Aor N08E
C1995National SemiconductorCorporation RRD-B30M105/PrintedinU.S.A.
