74HC00 Pin Configuration, Replacements, Applications and Other Details
13 December 2023
Ⅱ. Pin configuration and functions of 74HC00
Ⅲ. What are the features of 74HC00?
Ⅳ. Technical parameters of 74HC00
Ⅴ. Working principle of 74HC00
Ⅵ. Absolute maximum ratings of 74HC00
Ⅶ. What are the applications of 74HC00?
The 74HC00 is a high-speed CMOS device, and this article will introduce its pin configuration, features, technical parameters and working principle, and discuss its application scenarios. By knowing these information, I believe you will have a deeper understanding of this chip and be able to better apply it to real projects.
The 74HC00 is a four-input, sum-non-gate integrated circuit. It is pin compatible with the low power Schottky TTL (LSTTL) family. The device contains four independent NAND gates, each of which performs a logic function. The NAND gates utilize advanced silicon-gate CMOS technology to achieve similar operating speeds to LS-TTL gates with the low power consumption of standard CMOS integrated circuits. The outputs of all gates are buffered.
All devices have high noise immunity and are capable of driving up to 10 LS-TTL loads. 74HC logic family is fully compatible with the standard 74LS logic family in terms of functionality and pinout. All inputs are effectively protected from damage caused by electrostatic discharge by internal diode clamping to VCC and ground.
Replacements and equivalents:
• CD4011
• MC54HC00AJD
• M74HC00M1
• SN54LS00
• 74HCT00
The 74HC00 has 14 pins, their names and functions are as follows.
Pin 1 (1A): Data input
Pin 2 (1B): Data input
Pin 3 (1Y): Data output
Pin 4 (2A): Data input
Pin 5 (2B): Data input
Pin 6 (2Y): Data output
Pin 7 (GND): Ground
Pin 8 (3Y): Data output
Pin 9 (3A): Data input
Pin 10 (3B): Data input
Pin 11 (4Y): Data output
Pin 12 (4A): Data input
Pin 13 (4B): Data input
Pin 14 (VCC): Positive supply voltage
• The 74HC00 contains four independent NAND gates, each with four input pins and one output pin. It can realize the combination of multiple logic gates and more complex logic functions.
• 74HC00 is an integrated circuit made of CMOS technology, which is optimized for low power consumption.
• 74HC00 is available in DIP and SOIC packages.
• In noisy environments, the 74HC00 exhibits superior noise rejection capabilities, ensuring more dependable operation.
• Because the 74HC00 has excellent input and output drive capabilities, this allows it to be reliably connected to other logic gates or devices without distorting the signal.
• Manufacturer: Texas Instruments
• Length: 8.65mm
• Width: 3.91mm
• Height: 1.58mm
• Supply Voltage: 2 V ~ 6 V
• Operating Temperature: - 40°C ~ 85°C
• Propagation Delay Time: 23 ns
• Number of Bits: 4
• Number of Gates: 4
• Product Catagory: Logic Gates
In the 74HC00, each NAND gate has two inputs and one output. When both input terminals are high level, the output terminal is low level; when at least one input terminal is high level (K1 is pressed, K2 is disconnected) or low level, the output terminal is high level. Specifically, if both input terminals are high level (K1 is pressed and K2 is also disconnected), then the output terminal of 74HC00 will remain low level; if at least one of the two input terminals is low level (Whether K1 is disconnected or K2 is connected to low level), then the output terminal of 74HC00 will become high level.
In addition, 74HC00 also has a positive feedback effect. When the output terminal is at a high level, the voltage at the input terminal is pulled up through R1; when the output terminal is at a low level, the voltage at the input terminal is pulled down through R1. This positive feedback effect keeps the output state of the 74HC00 consistent with the input state until a stable state is reached.
• Buffer and driver: By connecting the input signals to the input pins of 74HC00 chip and obtaining the required output signals from the corresponding output pins, the buffer and driver of the signals can be realized.
• Logic operation: The 74HC00 chip can be used for the construction of various logic operation circuits, such as and gate, non-gate, or gate and iso-or gate. Complex logic operations can be achieved by properly linking and setting up the input and output pins of the 74HC00 chip.
• Embedded system: It is commonly used in control and interface circuits in embedded systems for connecting and coordinating different system components.
• Level conversion: The 74HC00 chip can be used as a logic level converter to convert TTL levels to CMOS levels. By correctly connecting and configuring the input and output pins of the 74HC00 chip, level conversion between different logic level standards can be realized.
• Timing and control: The 74HC00 chip can be used for timing and control circuits such as clock signal processing and pulse generation.
• Digital comparator: We can use 74HC00 to build a digital comparator. The function of size comparison is realized by comparing the values of two binary numbers and outputting the corresponding logic signals.
Frequently Asked Questions
1. What is the function of 74HC00?
The 74HC00 provides provides four independent 2-input NAND gates with standard push-pull outputs. The device is designed for operation with a power supply range of 2.0V to 6.0V.
2. How many NAND gates are designed in IC 74LS00?
74LS00 is a 14 pin IC that has four NAND gates each NAND gate has two inputs & one output.
3. What is the difference between 74HC00 and 74LS00?
One difference between the HC and LS version of the chip is that the 74HC00 supports 2V to 6V, while the 74LS00 supports only 5V. Once connected, you can use any of the four basic NAND gates inside.
4. What is 74HC series of integrated circuits?
The 74HC family has High-speed CMOS circuitry, combining the speed of TTL with the very low power consumption of the 4000 series. They are CMOS ICs with the same pin arrangements as the older 74LS family.
5. How can the 74HC00 be used in a circuit?
The 74HC00 can be used in various digital logic circuits where NAND gates are required. It is commonly used for tasks such as signal inversion, digital signal processing, and building more complex logical functions.
