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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
Sequential strobing of individual LED displays, at rate fast enough to eliminate flicker (about 10% duty cycle), cuts power requirements of LEDs and eliminates  need for power-wasting resistors in series with digit segments. Circuit uses 7492 binary counter connected to divide by 10, continuously clocked by 1000-Hz signal from external counter time base. Each of the 10 counter states is decoded by 7442 decoder for use in turning on PNP switch transistor connected in series with anode of each 7-segment LED digit. Digits are thus turned on fol 10'/0 of time at 100-Hz rate.-B. Hart, Current-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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