Where & How to use NE556 IC?
555 Type, Timer/Oscillator (Dual) Programmable Timers NE556 14 Pins 500kHz 14-DIP (0.300, 7.62mm)









555 Type, Timer/Oscillator (Dual) Programmable Timers NE556 14 Pins 500kHz 14-DIP (0.300, 7.62mm)
The NE556 dual monolithic timing circuit is a highly stable controller capable of producing accurate time delays or oscillation. The NE556 is the successor of the classic 555 Timer IC. It has two Timers inside a single package. This reduces the form factor and complexity of the system. Furthermore, Huge range of Semiconductors, Capacitors, Resistors and IcS in stock. Welcome RFQ.

NE556 Dual Timer Circuit (Demonstration & Theory)
NE556 Pinout
NE556 CAD Model

Symbol

Footprint

3D Model
NE556 Overview
The NE556 dual monolithic timing circuit is a highly stable controller capable of producing accurate time delays or oscillation. In the time delay mode of operation, the time is precisely controlled by one external resistor and capacitor. For a stable operation as an oscillator, the free-running frequency and the duty cycle are both accurately controlled with two external resistors and one capacitor. The circuit may be triggered and reset on falling waveforms, and the output structure can source or sink up to 200mA.
This article provides you with a basic overview of the NE556, including its pin descriptions, features, specifications, etc., to help you quickly understand what NE556 is.
NE556 Features
● Low turn off time
● Maximum operating frequency greater than 500kHz
● Timing from microseconds to hours
● Operates in both Astable and Monostable Modes
● High Output Current can source or sink 200mA
● Adjustable Duty Cycle
● TTL Compatible
● Temperature stability of 0.005% PER°C
Specifications
- TypeParameter
- Mount
In electronic components, the term "Mount" typically refers to the method or process of physically attaching or fixing a component onto a circuit board or other electronic device. This can involve soldering, adhesive bonding, or other techniques to secure the component in place. The mounting process is crucial for ensuring proper electrical connections and mechanical stability within the electronic system. Different components may have specific mounting requirements based on their size, shape, and function, and manufacturers provide guidelines for proper mounting procedures to ensure optimal performance and reliability of the electronic device.
Through Hole - Mounting Type
The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.
Through Hole - Package / Case
refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.
14-DIP (0.300, 7.62mm) - Number of Pins14
- Weight1.620005g
- Operating Temperature
The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.
0°C~70°C - Packaging
Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.
Tube - JESD-609 Code
The "JESD-609 Code" in electronic components refers to a standardized marking code that indicates the lead-free solder composition and finish of electronic components for compliance with environmental regulations.
e4 - Part Status
Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.
Obsolete - Moisture Sensitivity Level (MSL)
Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures
1 (Unlimited) - Number of Terminations14
- ECCN Code
An ECCN (Export Control Classification Number) is an alphanumeric code used by the U.S. Bureau of Industry and Security to identify and categorize electronic components and other dual-use items that may require an export license based on their technical characteristics and potential for military use.
EAR99 - Type555 Type, Timer/Oscillator (Dual)
- Terminal Finish
Terminal Finish refers to the surface treatment applied to the terminals or leads of electronic components to enhance their performance and longevity. It can improve solderability, corrosion resistance, and overall reliability of the connection in electronic assemblies. Common finishes include nickel, gold, and tin, each possessing distinct properties suitable for various applications. The choice of terminal finish can significantly impact the durability and effectiveness of electronic devices.
Nickel/Palladium/Gold (Ni/Pd/Au) - Voltage - Supply
Voltage - Supply refers to the range of voltage levels that an electronic component or circuit is designed to operate with. It indicates the minimum and maximum supply voltage that can be applied for the device to function properly. Providing supply voltages outside this range can lead to malfunction, damage, or reduced performance. This parameter is critical for ensuring compatibility between different components in a circuit.
5V - Number of Functions2
- Current Rating
Current rating is the maximum current that a fuse will carry for an indefinite period without too much deterioration of the fuse element.
20A - Frequency
In electronic components, the parameter "Frequency" refers to the rate at which a signal oscillates or cycles within a given period of time. It is typically measured in Hertz (Hz) and represents how many times a signal completes a full cycle in one second. Frequency is a crucial aspect in electronic components as it determines the behavior and performance of various devices such as oscillators, filters, and communication systems. Understanding the frequency characteristics of components is essential for designing and analyzing electronic circuits to ensure proper functionality and compatibility with other components in a system.
500kHz - Base Part Number
The "Base Part Number" (BPN) in electronic components serves a similar purpose to the "Base Product Number." It refers to the primary identifier for a component that captures the essential characteristics shared by a group of similar components. The BPN provides a fundamental way to reference a family or series of components without specifying all the variations and specific details.
NE556 - Pin Count
a count of all of the component leads (or pins)
14 - Power Supplies
an electronic circuit that converts the voltage of an alternating current (AC) into a direct current (DC) voltage.?
5/15V - Number of Channels2
- Nominal Supply Current
Nominal current is the same as the rated current. It is the current drawn by the motor while delivering rated mechanical output at its shaft.
20mA - Output Current
The rated output current is the maximum load current that a power supply can provide at a specified ambient temperature. A power supply can never provide more current that it's rated output current unless there is a fault, such as short circuit at the load.
200mA - Quiescent Current
The quiescent current is defined as the current level in the amplifier when it is producing an output of zero.
4mA - Current - Supply
Current - Supply is a parameter in electronic components that refers to the maximum amount of electrical current that the component can provide to the circuit it is connected to. It is typically measured in units of amperes (A) and is crucial for determining the power handling capability of the component. Understanding the current supply rating is important for ensuring that the component can safely deliver the required current without overheating or failing. It is essential to consider this parameter when designing circuits to prevent damage to the component and ensure proper functionality of the overall system.
20mA - High Level Output Current
High-level Output Current IOH The current flowing into the output at a specified high- level voltage. Low-level Output Current IOL The current flowing into the output at a specified low- level output voltage.
-200mA - Low Level Output Current
The current into the output terminal with input conditions applied that, according to the product specification, will establish a low level at the output.
200mA - Voltage - Supply (Max)
Voltage - Supply (Max) is a parameter in electronic components that specifies the maximum voltage that can be safely applied to the component for proper operation. This parameter is crucial for ensuring the component's longevity and preventing damage due to overvoltage conditions. Exceeding the maximum supply voltage can lead to component failure, reduced performance, or even permanent damage. Designers must carefully consider this parameter when selecting components and designing circuits to ensure reliable and safe operation within the specified voltage limits.
16V - Voltage - Supply (Min)
Voltage - Supply (Min) is a parameter in electronic components that specifies the minimum voltage required for the component to operate within its specified performance range. This parameter indicates the lowest voltage level that can be safely applied to the component without causing malfunctions or damage. It is crucial to ensure that the supply voltage provided to the component is equal to or higher than the specified minimum voltage to guarantee proper functionality and reliability. Failure to meet this requirement may result in erratic behavior, reduced performance, or even permanent damage to the component.
4.5V - Height3.3mm
- Length19.05mm
- Width6.35mm
- REACH SVHC
The parameter "REACH SVHC" in electronic components refers to the compliance with the Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) regulation regarding Substances of Very High Concern (SVHC). SVHCs are substances that may have serious effects on human health or the environment, and their use is regulated under REACH to ensure their safe handling and minimize their impact.Manufacturers of electronic components need to declare if their products contain any SVHCs above a certain threshold concentration and provide information on the safe use of these substances. This information allows customers to make informed decisions about the potential risks associated with using the components and take appropriate measures to mitigate any hazards.Ensuring compliance with REACH SVHC requirements is essential for electronics manufacturers to meet regulatory standards, protect human health and the environment, and maintain transparency in their supply chain. It also demonstrates a commitment to sustainability and responsible manufacturing practices in the electronics industry.
No SVHC - Radiation Hardening
Radiation hardening is the process of making electronic components and circuits resistant to damage or malfunction caused by high levels of ionizing radiation, especially for environments in outer space (especially beyond the low Earth orbit), around nuclear reactors and particle accelerators, or during nuclear accidents or nuclear warfare.
No - RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
ROHS3 Compliant - Lead Free
Lead Free is a term used to describe electronic components that do not contain lead as part of their composition. Lead is a toxic material that can have harmful effects on human health and the environment, so the electronics industry has been moving towards lead-free components to reduce these risks. Lead-free components are typically made using alternative materials such as silver, copper, and tin. Manufacturers must comply with regulations such as the Restriction of Hazardous Substances (RoHS) directive to ensure that their products are lead-free and environmentally friendly.
Lead Free
NE556 Functional Block Diagram
NE556 Equivalent
| Model number | Manufacturer | Description |
| LM556J-MIL/NOPB | Texas Instruments | DUAL PULSE; RECTANGULAR, TIMER, CDIP14, CERDIP-14 |
| SE556-1F | NXP Semiconductors | IC DUAL PULSE, 0.5 MHz, TIMER, CDIP14, CERDIP-14, Analog Waveform Generation Function |
| SE556-1F/883 | Signetics | 2 Func, 0.5MHz, BIPolar, CDIP14, DIP-14 |
| LM556CJ | National Semiconductor Corporation | IC DUAL RECTANGULAR, TIMER, CDIP14, CERAMIC, DIP-14, Analog Waveform Generation Function |
| NE556J | Texas Instruments | DUAL PULSE; RECTANGULAR, TIMER, CDIP14, CERAMIC, DIP-14 |
| NE556-1N | NXP Semiconductors | DUAL PULSE, 0.5MHz, TIMER, PDIP14, PLASTIC, DIP-14 |
| LM556J/NOPB | National Semiconductor Corporation | IC DUAL RECTANGULAR, TIMER, CDIP14, ROHS COMPLIANT, CERAMIC, DIP-14, Analog Waveform Generation Function |
| SE556CN | Signetics | Analog Waveform Generation Function, BIPolar, PDIP14 |
| TLC556MN | Texas Instruments | Low-Power Dual LinCMOS Timer 14-PDIP -55 to 125 |
Where to use NE556 IC?
The NE556 IC is the dual version of the NE555 IC, meaning the NE556 has two timers inside it. As we know 555 ICs have been used for a long time now due to their reliable properties and applications. The NE556 can also be used for all those applications additionally since this works with CMOS technology we can have two timers inside a single package with improved characteristics.
So if you are looking for a modern replacement for the 555 Timer IC then NE556 might be the right choice for you.
How to use NE556 IC?
Application wise both NE555 and NE556 are one and the same, so if you want to know the basic of the Timer IC then read through the NE555 page. Since the NE556 is a 14-pin dual timer package there are two sets of all the timer pins (Threshold, Out, Trigger, Control Voltage, Discharge) and both the timer share the same Vcc and ground pins.
Timer IC's are the most commonly used ICs for timing and Pulse generation applications. They can adopt itself into various applications due to its different operating modes. They are very simple to understand and if we take a look at the components present inside as shown below.

There are three resistors of value 5K, which gives this IC it's iconic name “555 Timer”. It has dual comparators and flip-flop which will make this IC operated in three different modes such as Astable, Monostable and Bistable(Schimitt) Mode.
Difference Between 555 and 556 IC
The NE556 is the successor of the classic 555 Timer IC. It has two Timers inside a single package. This reduces the form factor and complexity of the system. Functionality and pin description wise both 555 and 556 are identical.
Parts with Similar Specs
NE556 Application
● 50% Duty Cycle Oscillator
● Pulse Width Modulator
● Tone Burst Generator
● Monostable Operation
● Astable Operation
● Time Delay Generation
● Pulse generation
● Precision Timing
● Sequential Timing circuits
NE556 Package

DIP-14 Package
NE556 Manufacturer
STMicroelectronics is a globally recognized semiconductor company. They are dedicated to developing semiconductor solutions for various microelectronics applications. STMicroelectronics enjoys unrivaled silicon and system expertise, strong manufacturing strength, IP portfolio, and solid relationships with their strategic partners. Based on these advantages, STMicroelectronics has become a pioneer in System-on-Chip (SoC) technology and its products have a positive effect in realizing today's convergence trends.
Datasheet PDF
- Datasheets :
Trend Analysis
What is the difference between NE556N and NE556? Can 556 be used instead of 556N?
NE556 is a general term. According to the suffix, it can be patched or in-line, with exactly the same function. NE556N is in-line, DIP14 package. If you want to replace it, the function is completely possible, but you have to look at the package (shell) and don't fail to install it at that time. By default, NE556 is equivalent to NE556N.
What is a 556 timer?
The 556 timer is a 14 pin configuration is shown in the figure. Each Timer is provided with its own threshold, trigger, discharge, control, reset, and output pins. This IC can be used for both the oscillator as well as pulse generator due to the availability of two separate 555 timers.
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