onsemi

LM556CN

LM556CN Description

The LM556CN is a dual timer/oscillator IC designed by onsemi, a leading manufacturer in the electronics industry. This versatile component is part of the Programmable Timers and Oscillators category and is housed in a Tube package, making it suitable for a wide range of applications. The LM556CN is a dual version of the popular 555 timer, offering enhanced functionality and flexibility.

LM556CN Features

The LM556CN is designed to operate within a temperature range of 0°C to 70°C, ensuring reliable performance in various environmental conditions. It features a supply current of 30 mA and a supply voltage range of 4.5V to 16V, providing a wide operating window that accommodates different power supply requirements. The dual timer/oscillator design allows for two independent timing functions within a single package, optimizing space and reducing component count in complex circuits.

Key specifications include:

• Operating Temperature: 0°C to 70°C
• Supply Current: 30 mA
• Supply Voltage: 4.5V to 16V
• Mounting Type: Through Hole
• Package: Tube
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• ECCN: EAR99
• REACH Status: REACH Unaffected
• HTSUS: 8542.39.0001

LM556CN Applications

The LM556CN is ideal for applications requiring precise timing and oscillation functions. Its dual timer/oscillator capability makes it suitable for complex circuits where multiple timing functions are needed. Some specific use cases include:

• Pulse Generation: Ideal for generating precise pulses in digital circuits, such as clock signals for microcontrollers or timing intervals in communication systems.
• Frequency Modulation: Can be used to modulate the frequency of signals, useful in radio frequency (RF) applications or audio signal processing.
• Sequential Timing: Perfect for applications requiring sequential timing, such as in motor control or multi-step processes in industrial automation.
• Monostable and Astable Multivibrators: The LM556CN can be configured to operate as monostable or astable multivibrators, making it versatile for various timing and oscillation needs.

Conclusion of LM556CN

The LM556CN, despite being marked as obsolete, remains a valuable component in the electronics industry due to its robust performance and wide range of applications. Its dual timer/oscillator design offers significant advantages over single timer models, providing more functionality in a compact form factor. The LM556CN is particularly well-suited for applications requiring precise timing and oscillation, such as pulse generation, frequency modulation, and sequential timing. While newer alternatives may exist, the LM556CN continues to be a reliable choice for engineers and designers looking for a proven solution in programmable timers and oscillators.