7400 Series Guide: 74HC7001 (AND gates)

The 74×7001 (ex 74HC7001) is a chip with four Schmitt-trigger AND gates. Schmitt-trigger gates are more robust against noise, and they make it easy to build oscillators that you can use for many interesting circuits.

In this guide, you will learn all about this chip and how you can use its Schmitt-trigger AND gates in your own projects.

What does the 74HC7001 do?

The 74×7001 gives you four Schmitt-trigger AND gates that can be used individually. An AND gate is a logic gate that outputs 1 (HIGH) only if all of its inputs are 1 (HIGH). In the truth table below, you can see what the output will be for any given input:

What is a Schmitt Trigger?

The special thing about the gate inputs being Schmitt-triggered is that the thresholds for transitioning between 0 and 1 are different.

Let’s take an example: If you supply this chip with three AA batteries (4.5V), the input voltage needs to be higher than 2V to be recognized as a 1 (HIGH). However, once it’s already HIGH, the voltage has to fall below 0.9V for the input to be considered a 0 (LOW). (You can find these values from the datasheet).

How To Use This Chip

The 74HC7001 comes in a 14-pin package, and you need to connect it to power before you can use it. It supports a power supply of 2V to 6V, and it can sink or source about 4 mA from each output when powered with 5V.

Once it’s connected to power, you can use any of the AND gates inside.

74×7001 Pinout

Pin #	Type	Description
1	Input	Input to the first AND gate.
2	Input	Input to the first AND gate.
3	Output	Output from the first AND gate.
4	Input	Input to the second AND gate.
5	Input	Input to the second AND gate.
6	Output	Output from the second AND gate.
7	Power	Connect to ground (GND).
8	Output	Output from the third AND gate.
9	Input	Input to the third AND gate.
10	Input	Input to the third AND gate.
11	Output	Output from the fourth AND gate.
12	Input	Input to the fourth AND gate.
13	Input	Input to the fourth AND gate.
14	Power	Positive power supply (VCC). Connect to +5V power.

74HC7001 Circuit Example

Here’s a simple project you can build with the AND gates in the 74HC7001 IC.

The pull-down resistors pull both inputs to the AND gate LOW when the buttons are not pushed. Push any of the buttons, and you’ll make the input pin HIGH. A HIGH on both inputs will turn on the output and thereby turn on the Light-Emitting Diode (LED).

The LED will only turn on if you push both buttons at the same time.

To build this circuit, you’ll need the following parts:

• 1 x 74HC7001
• 1 x LED (L1)
• 2 x 10 kΩ resistor (R1-R2)
• 1 x 1 kΩ resistor (R3)
• 2 x pushbutton (S1-S2)

Alternatives for 74HC7001

Can’t find the 74HC7001 anywhere? Then try one of the following IC alternatives:

• 74×08 – Quad 2-input AND gates.
• 74×09 – Quad 2-input AND gates (with open-collector outputs).
• CD4081 – Quad 2-input AND gates.

If you can’t find the 74HC7001 IC in your local electronics store, don’t worry, you’ll most likely find it in one of the stores listed on this page of online stores where you’ll find components and tools for all your electronics projects.

Datasheet for the 74HC7001 chip

Download the PDF datasheet for your version of the 74×7001 here:

• SN74HC7001 (Texas Instruments)