7400 Series Guide: 74HC133/74LS133 (13-input NAND gate)

The 74×133 (ex 74HC133) is a chip containing a 13-input NAND gate, making it ideal for applications requiring logic operations with a large number of inputs.

In this guide, you’ll learn the essentials about this chip so you can effectively incorporate multi-input NAND logic into your own projects.

What does the 74HC133 / 74LS133 do?

The 74×133 is a 13-input NAND gate. It takes in up to 13 separate digital inputs, labeled from A to M.

In a NAND gate, the output is LOW (0) only when all the inputs are HIGH (1). So, for the 74×133, if all 13 inputs are HIGH, the output will become LOW. If even one input is LOW, the output will be HIGH.

This chip is useful in situations where you need to check if all inputs are HIGH simultaneously, like in condition checking, control logic circuits, or complex logic gate combinations.

How To Use This Chip

The 74HC133 comes in a 16-pin package, and you need to connect it to power before you can use it. Most 7400 ICs support a VCC voltage of 5V. One difference between the HC and LS version of the chip is that the 74HC133 supports 2V to 6V, while the 74LS133 only supports 5V.

74HC chips can normally supply a maximum of 4 mA from an output pin. If you’re using the 74LS version, the maximum current you can pull out of one output pin is 0.4 mA when the pin is high (sourcing) or 8 mA when the pin is low (sinking).

But these values can differ between models, so check the datasheet of your model to verify.

Once you’ve connected it to power, you can use the 13-input NAND gate inside.

74×133 Pinout

The 74×133 has 16 pins and contains 13-input NAND gate laid out as shown in the pinout diagram below:

Pin Name	Pin #	Type	Description
A	1	Input	Input to the 13-input NAND gate.
B	2	Input	Input to the 13-input NAND gate.
C	3	Input	Input to the 13-input NAND gate.
D	4	Input	Input to the 13-input NAND gate.
E	5	Input	Input to the 13-input NAND gate.
F	6	Input	Input to the 13-input NAND gate.
G	7	Input	Input to the 13-input NAND gate.
GND	8	Power	Connect to ground (GND).
Y	9	Output	Output from the 13-input NAND gate.
H	10	Input	Input to the 13-input NAND gate.
I	11	Input	Input to the 13-input NAND gate.
J	12	Input	Input to the 13-input NAND gate.
K	13	Input	Input to the 13-input NAND gate.
L	14	Input	Input to the 13-input NAND gate.
M	15	Input	Input to the 13-input NAND gate.
VCC	16	Power	Positive power supply. Connect to +5V power.

Alternatives and Equivalents for 74HC133 / 74LS133

There are many versions of the 74×133 chip. They all have the same functionality, but with different specifications such as supported voltages and maximum current output.

Here’s a list of a few equivalents of this chip:

• 74HC133 (High-speed CMOS)
• 74HCT133 (High-speed CMOS, TTL compatible)
• 74LS133 (High-speed TTL)
• 74LVC133 (Low Voltage TTL)
• 74AC133 (Advanced CMOS)
• 74ALS133 (Advanced Low-Power Schottky TTL)
• 74F133 (Very High Speed)
• 74C133 (CMOS, similar to the 4000-series)

Some manufacturers also add a prefix, such as the SN74HC133 and SN74LS133 by Texas Instruments.

Can’t find the 74×133 anywhere? Then try one of the following IC alternatives:

• 74×30 – 8-input NAND gate.
• CD4068 – 8-input NAND gate.

If you can’t find the 74×133 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 74LS133 and 74HC133 chips

Download the PDF datasheet for your version of the 74×133 here:

• 74LS133 (Motorola)
• M74HC133 (STMicroelectronics)
• DM74S133 (Fairchild)
• M74HC133 (SGS-Thomson)