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ID = 77829
Brand: NEC Corporation, Nippon Electric Co. Ltd. (Nippon Denki); Tokyo
Tube type:  IC - Integrated Circuit   Universal 
Identical to µPC271
Similar Tubes
Normally replaceable-slightly different:

Base SPECIAL TUBEBASE in general
Was used by Industrial

Aufbau/Content: IC (24 Trans., 23 Widerst., 5 Dioden);
Form/Case/Outline: DIP-8 (µPC271C) | CerDIP-8 (µPC271ED) | SOP-8 (µPC271G);
Type/Application: Precision Voltage Comparator;
Daten/ Vcc: 5 V single | +/- 15 V dual; Icc: (+7.5 / -5) mA; Pd: <500 mW; T op: -20...+80 °C.
Variant: µPC311[C] = commercial version: -55...+125 °C;

Dimensions (WHD)
incl. pins / tip
10 x 7 x 8 mm / 0.39 x 0.28 x 0.31 inch
Weight 1 g / 0.04 oz
Information source - - Manufacturers Literature   

Usage in Models 1= 1980??

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):1

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