The SN74LS00N is a well-known member of the 7400-series logic family, offering reliable and efficient digital logic functionality through its four independent 2-input NAND gates. As one of the building blocks in digital electronics, this IC is used in applications ranging from simple switching logic to complex control systems. This article will discuss the SN74LS00N’s key features, specifications, applications, and more.

Catalog

SN74LS00N Description

The SN74LS00N is a high-performance logic IC that features four independent 2-input NAND gates in a single package. Each gate performs the Boolean operation Y = ¬(A × B), providing the logical NAND function in positive logic. This makes the SN74LS00N ideal for digital systems that require fundamental logic control, such as timing circuits, pulse generation, and signal processing applications.

Built using low-power Schottky transistor technology, the SN74LS00N ensures fast switching speeds with minimal power consumption. It operates reliably across a wide voltage range and is compatible with most TTL logic families, making it suitable for both educational projects and industrial designs. Its standard 14-pin Dual In-line Package (DIP) also allows easy installation on breadboards and PCBs for quick prototyping.

If you are interested in purchasing the SN74LS00N, feel free to contact us for pricing and availability.

SN74LS00N Alternatives and Equivalents

SN74LS00N Logic Diagram

The SN74LS00N logic diagram represents a 2-input NAND gate, one of the four gates contained in the IC. Each gate has two input terminals, A and B, and one output terminal, Y. The small circle at the output symbolizes inversion, meaning the output is the logical NOT of the AND operation of the inputs. In Boolean form, it is expressed as Y = ¬(A • B) or Y = A̅ + B̅.

The functional table clarifies how the gate behaves: when both inputs A and B are HIGH (logic “1”), the output Y is LOW (logic “0”). In all other input combinations, the output remains HIGH. This inverse behavior makes the NAND gate a key component in digital logic circuits, capable of forming any other logic function when combined appropriately.

SN74LS00N Pinout Configuration and Function

SN74LS00N Typical Application Diagram

The SN74LS00N Typical Application Diagram illustrates how NAND gates can be used to combine error signals from two sensors into a single error flag output. Each sensor (Sensor1 and Sensor2) generates its own error signal - labeled Error1 and Error2 - which are then fed into a NAND gate. The NAND gate processes these inputs and produces an Error Flag signal at the output.

In operation, the error flag will remain low only when both sensors detect an error simultaneously. If either one or both sensors are functioning correctly, the NAND gate ensures the error flag remains high, indicating normal system operation. This configuration provides a simple yet reliable way to monitor multiple sensors and identify simultaneous fault conditions in a digital control system.

SN74LS00N Specifications

SN74LS00N Absolute Maximum Ratings

SN74LS00N Recommended Operating Conditions

SN74LS00N Electrical Characteristics

SN74LS00N Features

• Quad 2-Input NAND Gates - Contains four independent 2-input NAND gates within a single 14-pin Plastic Dual In-line Package (PDIP), ideal for breadboard and through-hole PCB applications.

• TTL Logic Compatible - Designed for standard TTL voltage levels with input thresholds of V_IH = 2.0V (HIGH) and V_IL = 0.8V (LOW), allowing seamless integration with other TTL-based components.

• Typical Operating Voltage: 5V - Operates reliably with a nominal 5V DC supply while maintaining compatibility with 3.3V logic inputs in mixed-voltage systems.

• Fast Switching Speed - Offers a typical propagation delay of 10 ns, suitable for high-speed digital logic circuits.

• Low Power Consumption - Features low standby current and reduced power dissipation, enhancing overall circuit efficiency.

• High Noise Immunity - Provides stable logic performance and reduced susceptibility to electrical noise in complex digital environments.

• Strong Output Drive Capability - Each output can drive up to 10 standard TTL inputs, allowing multiple gate connections without requiring a buffer.

• Standard 14-Pin PDIP Package - The durable Plastic Dual In-line Package ensures easy handling, soldering, and prototyping for educational, industrial, or embedded circuit designs.

• Wide Operating Temperature Range - Designed to operate reliably between 0°C and 70°C, making it suitable for most general-purpose and industrial applications.

• Stable Electrical Characteristics - Maintains consistent performance under varying supply voltages and temperature conditions.

SN74LS00N Applications

• Digital Logic Circuits - Commonly used in basic digital logic systems for performing NAND gate operations and implementing custom logic functions.

• Timing and Pulse Generation - Used in clock and timing circuits to create pulse signals, delays, and synchronization for sequential logic systems.

• Signal Inversion and Control - Acts as an inverter or logic controller in switching applications where logic inversion or conditional signal flow is required.

• Arithmetic and Logic Units (ALUs) - Serves as a core element in ALU designs to perform logic-based operations such as addition, subtraction, and comparison.

• Microcontroller and Processor Interfaces - Provides logic interfacing between microcontrollers or CPUs and peripheral devices in embedded systems.

• Data Latching and Buffering - Used to control data flow and maintain signal stability between different digital subsystems.

• Oscillator and Frequency Divider Circuits - Supports wave-shaping, frequency division, and timing synchronization in oscillator and counter circuits.

• Relay and LED Driver Circuits - Functions as a simple driver to control relays, LEDs, or other low-power loads through logical control signals.

• Industrial Control Systems - Applied in automation, sensor logic, and machine control units for reliable logic decision-making.

• Educational and Prototyping Projects - Ideal for learning digital electronics concepts and constructing experimental circuits using standard logic gates.

SN74LS00N CAD Models

SN74LS00N Symbol               SN74LS00N Footprint         SN74LS00N 3D Model

SN74LS00N Layout Example

The SN74LS00N Layout Example shows how a NAND gate can be connected in a typical circuit setup. In this layout, a resistor labeled Rs is connected between the power supply (Vcc) and one of the input terminals of the NAND gate. This resistor limits the current flowing into the gate, ensuring stable logic operation and protecting the IC from excessive current. The second input of the NAND gate receives the Input signal directly, allowing it to interact with the voltage level set through Rs.

The Output pin of the NAND gate delivers the resulting logic signal, which depends on the combination of the two inputs. This configuration illustrates how external components like resistors are used to control current and voltage levels in digital circuits using the SN74LS00N, ensuring reliable performance in logic processing applications

SN74LS00N Mechanical Drawing

The SN74LS00N comes in a Plastic Dual-In-Line Package (PDIP-14), designed for through-hole mounting. This package has two parallel rows of pins spaced 2.54 mm apart, making it compatible with standard breadboards and PCBs. The body length ranges from 18.92 mm to 19.69 mm, while the width spans 6.10 mm to 6.60 mm, offering a compact yet durable housing for four NAND gates inside.

Each pin is 0.38 mm to 0.53 mm thick and extends 3.18 mm to 5.08 mm from the seating plane, ensuring reliable mechanical and electrical contact when soldered. The row spacing between the two pin lines is 7.62 mm to 8.26 mm, providing enough clearance for stable insertion into through-hole boards. The overall height does not exceed 10.92 mm, which helps maintain a low profile in compact designs.

SN74LS00N in Circuit Design

The SN74LS00N in this circuit is used to demonstrate the basic operation of a NAND logic gate. It receives two input signals from the push button and fixed connections, and processes them through one of its internal NAND gates. When both inputs are high, the output becomes low, causing the LED to turn off. For all other input combinations, the output remains high, lighting up the LED. This setup helps visualize how digital logic responds to changing inputs, making it useful for learning or testing basic logic functions. The power supply provides a stable 5V to the IC, ensuring proper operation of the TTL logic family.

SN74LS00N Advantages and Limitations

Advantages of SN74LS00N

• Low Power Consumption - The SN74LS00N operates efficiently with minimal power usage, making it suitable for battery-powered and low-energy applications.

• High Noise Immunity - Built with TTL (Transistor-Transistor Logic) technology, it offers strong resistance to electrical noise, ensuring stable and reliable logic operation in industrial and digital systems.

• Fast Switching Speed - The device provides quick response times, which is ideal for timing-sensitive circuits, pulse generation, and logic signal processing.

• Wide Operating Voltage Range - It typically operates from 4.75 V to 5.25 V, allowing flexibility across many standard logic systems without additional regulation circuits.

• Ease of Integration - Housed in a standard 14-pin PDIP package, the SN74LS00N can be easily mounted on breadboards and PCBs, simplifying circuit design and prototyping.

• Multiple Gates in One Chip - It includes four independent 2-input NAND gates in a single IC, reducing component count and saving board space.

Limitations of SN74LS00N

• Limited Voltage Range - It is designed mainly for 5 V logic systems, making it less compatible with low-voltage modern digital circuits that use 3.3 V or lower.

• Moderate Output Drive - The output current capacity is limited, which may not be sufficient for driving heavy loads or high-current devices directly.

• Temperature Sensitivity - Like other TTL components, extreme temperature variations can slightly affect its switching performance and reliability.

• Obsolete in Some Designs -With the rise of CMOS logic families, such as 74HC00, newer alternatives offer lower power and wider voltage compatibility.

Manufacturer

The manufacturer of the SN74LS00N, Texas Instruments (TI), is a globally-recognized leader in semiconductor design and manufacturing, operating large-scale fabrication facilities and offering a broad portfolio of analog, digital and embedded processing ICs. With established global manufacturing, packaging and testing capabilities, TI supports high-volume logic family products like the SN74LS00 series with robust supply chain, long lifecycle production, finished goods packaging (including tube, tape-and-reel, cut tape), lot/date code traceability and full technical documentation and quality assurance.

Conclusion

The SN74LS00N continues to be a reliable and versatile logic IC for countless digital applications. With its robust design, low power requirements, and fast switching capabilities, it serves as a foundational component in timing, control, and logic processing systems. Despite newer CMOS-based alternatives offering broader voltage ranges, the SN74LS00N remains a preferred choice for its simplicity, proven performance, and wide availability. Whether building a prototype or enhancing an existing digital system, the SN74LS00N delivers dependable performance backed by Texas Instruments’ trusted quality.