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7442

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Technical/Catalog Information74423-050LF
VendorFCI
CategoryConnectors
Card TypePCMCIA
Card Entry DirectionUp
Connector TypeHeader, Ejector Assembly
Ejector Side-
Ejector TypePush, Pull
Features-
Height Above Board0.425" (10.80mm)
Mounting TypeSurface Mount, Right Angle, Screw Mount
Stacking TypeSingle
PackagingTray
Lead Free StatusLead Free
RoHS StatusRoHS Compliant
Other Names 74423 050LF
74423050LF

Product Manufacturers Pack D/C
7442 - - -

Pinout/Connection Diagram

7442 Circuit
Duty cycle of each display digit can be varied from 10% (full on with strobing) to less than 1% (almost off).Circuit uses 7490 and 7442 as 1-of-10 multiplex driver to strobe cathodes of display digits through Q1, Q3, etc and tum on required 7400 multiplex gate through Q2, Q4, etc. Outputs of 7447 are polarity-inverted by QA, QB, etc, which can be Sylvania ECG 159 rated at 200 mA. Q1,Q3, etc can be EGG 123 or HEP S0002, while Q2, Q4, etc can be any silicon PNP transistor.-B.Hart, Cument-Saver Counter Display, 73 Magazine, June 1977, p 174-176.

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PDF / Datasheet

7442 PDF Download

7442

File Size: 42378 KB
Manufacturer: FAIRCHILD [Fairchild Semiconductor]

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