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ID = 37987
Brand: Hitachi Ltd.; Tokyo
Tube type:  IC - Integrated Circuit   Indication 
Identical to HD38991
Similar Tubes
Normally replaceable-slightly different:
  LM8361 ; MM5387 ; NTE2060 ; S1998A

Base SPECIAL TUBEBASE in general
Filament Solid State

Aufbau/type: IC (E/D MOS LSI) Digital-Uhr / Digital Clock;
Form/Case/Outline: DIP-40;
Daten/ Vcc: __ V, Icc: __ mA; Pd: __ mW; t op: -__...+__ °C;
Application/Type: für Uhren(-Radios) mit Ausgängen für 3 1/2-stellige Anzeige (7-Segment LED), 50/60 Hz, 12/24-Std.-Anzeige.

Dimensions (WHD)
incl. pins / tip
50 x 20 x 7 mm / 1.97 x 0.79 x 0.28 inch
Weight 3 g / 0.11 oz
Information source -- Schematic   
  HD38991: Hitachi
Hans Völkening
HD38991: Hitachi
Günther Stabe

HD38991: Hitachi
Thomas Günzel

Usage in Models 1= 1975?? ; 1= 1980?? ; 1= 1980

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):3

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