Answer / deepa s

in ic7432 74 indicates 7active pins in the pin diagram of
the circuit and 4indicates 4gates on this pin diagram.last
two digits indicates ic code of the circuit.

Answer / rajbharath

ic s are having dual line package.... there a side u can see
7 pins in each side....and 4 gates are in the ic. so the ic
numbers starts from 74.......

Answer / anandkumar m k

Not every IC's start with 74, we have 7805,7905, etc. In
case of IC 74 series, we can see that the pin 4 and 7 are
supplied -Vcc and +Vcc supplied respectively. And most
importantly this convention is not the case in every IC
that first two number denotes the power supply pins.

Answer / peddapalli saikumar

some ics r there wich starts with 78 and 79 series.
eg: in 7805 the 78 is a symbol for +ve voltage and 05 is a indiction of voltage quantity,
in 7905 the 79 indicates the -ve coffecient and 05 represent the voltage level...
in the case of 74 series, the voltage level is applied in between these 2 pins.

Answer / pragadesh

74 indicates temperature range of ics

Answer / amit thakur02

ICS starts with 74 because the power supply is provided to
pin no 7 & 4 .that why it is called 74 ICS

Answer / deepak

Because the power supply is connected on pin 4,7 of the 74
series Ics.

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