The NE556N is a dual precision timer from Texas Instruments. It is a 16-pin plastic dual in-line package (PDIP) containing two independent, high-precision timing circuits. It has a wide range of operating and timing ranges, from microseconds to hours. It is suitable for use in many timing applications and can be used as a one-shot, a delay-off timer, or an astable oscillator. It features a power-on reset circuit with a built-in reset output, eliminating the need for an external reset circuit. It is a logic-compatible CMOS part, making it suitable for digital systems, and is a stable device. It is very reliable and long-lived in a wide range of temperatures and operating conditions.