CD4071 - Dual-Input OR Gate IC

2 July 2018 - 0 Comments

CD4071B OR Gate IC

CD4071 IC Pinout

Pin Configuration

Pin Number	Pin Name	Description
1,6,10,15	OR Gate Input pin (A)	First Input pin for the OR gate
2,5,11,14	OR Gate Input pin (B)	Second Input pin for the OR gate
3,4,12,13	OR Gate Output pin (Q)	Output pin for the OR gate
7	组织nd	Connect to the ground of the circuit.
14	Vcc (Vdd)	Used to power the IC. Typically +5V is used

Features

Dual Input OR Gate – Quad Package
Typical Operating Voltage: 5V
Operating Voltage Range: -0.5V to +20V
DC input current: ±10mA
Power Dissipation: 500mW
Minimum logic Low voltage @+5V: 1.5V
Minimum Logic High voltage @+5V: 3.5V
Propagation Delay @5V : 250ns (maximum)
Transition Time @5V :200ns (maximum)
Available in 14-pin PDIP, GDIP, PDSO packages

Note:Complete Technical Details can be found at theCD4071 datasheetprovided below this article.

CD4071 Equivalent

74LS32

Other Logic Gates

74LS00,74LS08,74LS02,74LS04,74HCT04

Where to use CD4071 IC

TheCD4071is aDual Input OR Gate with Quad package. Meaning it has four OR gate IC inside it, each of which can be utilized independently. AND gates are used in building Logic level circuits like Encoder, Decoder multiplexers etc. Logic level gates likeCD4071and flip-flops play a vital role in digital electronics.

If you are looking for an IC to perform logic level OR operation with two inputs, then this IC might be the right choice for you. If you have more than two inputs for your OR gate then you should look into three input and four input OR gates.

Logic OR explanation

The logic OR operation is very simple, since this is a two input OR gate we will have only two inputs which is A and B respectively. The output of the OR gate is called as Q. Thetruth table for the OR gateis shown below.

A	B	Q
0	0	0
1	0	1
0	1	1
1	1	1

How to use CD4071 IC

TO use the CD4071 IC, just power it using the Vcc (pin 14) and ground (pin 8) lines. The typical operating voltage of the IC is +5V, but it can also be operated in +5V, +10V and +15V. The output voltage of the IC on the pin Q will be equal to the operating voltage of the IC. As per the truth table shown above, when either one or both the input of the Gate is high the output will be high. The complete working of the gate with asample CD4071 circuitis shown in the GIF file below.

OR gate working

门的输入是通过使用一个控制软件itch connected to pin A and B of the Gate. A pull down resistor of 100k is used to hold the logic to low (logic 0) when the switch is left floating. To visualize the output we have connected a LED to the output pin Q. The resistor 680R is used to limit the current through the LED.