7402 is a kind of logic gate integrated chips, including quad two input positive NOR gates. The gates in the chip are designed by low power schottky transistors. It is basically used when NOR logic function is required, and we can use one or all gates for kinds of circuits. It features maximum supply voltage 7v, TTL outputs, low power consumption, operating temperature from 0 to 70 ℃, typical rise time 15ns, typical fall time 15ns.
Next it is mainly to introduce the 7402 pinout and 7402 circuit diagram for your demands.
7402 has 14 pins, in total four groups of NOR gates, knowing each pins individual usage to make the whole chip achieve its function.
The 7402 pinout can be found in the picture below:
also the pin configurations for 7402 are labeled already.
Pin 1, Y Output Gate 1
Pin 2, A Input Gate 1
Pin 3, B Input Gate 1
Pin 4, Y Output Gate 2
Pin 5, A Input Gate 2
Pin 6, B Input Gate 2
Pin 7, Ground
Pin 8, A Input Gate 3
Pin 9, B Input Gate 3
Pin 10, Y Output Gate 3
Pin 11, A Input Gate 4
Pin 12, B Input Gate 4
Pin 13, Y Output Gate 4
Pin 14, Positive Supply
7402 circuit schematic
A circuit schematic can better help us to understand circuits and components used, and it's a reference to make the actual circuit work.
Below is a fully labeled 7402 schematic diagram for reference.
Referring to 7402 Features, the first scene we can think is that it works as logic gate IC.
Except that one, there still have some other features and applications we may need to know, which can help us to make use of it well, such as outputs directly interface to CMOS, NMOS and TTL, large operating voltage range, wide operating conditions. It helps when you want logic inverter. NOR gates in this chip can be reconnected to make then NOR gates, and each NOR gate can form a single NOT gate.
Recommendations for 7402:
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