The SPWNE555D is a highly stable timer integrated circuit manufactured by Elektronische Bauelemente. It can be operated in Astable mode and Monostable mode. With monostable operation, the time delay is controlled by one external and one capacitor. With a stable operation, the frequency and duty cycle are accurately controlled with two external resistors and one capacitor. The chip is used for precision timing, pulse generation and time delay generation.
The SPWNE555D is a highly stable single‑timer integrated circuit from Secos that can operate in both astable and monostable modes. In monostable mode the time delay is set by an external resistor and capacitor, while in astable mode the frequency and duty cycle are controlled by two external resistors and a capacitor.
The document lists absolute maximum ratings, detailed electrical characteristics, timing curves, propagation delay data, and an example application circuit for astable operation, including pin connections and component values.
| Maximum Output Current | 200 mA |
|---|---|
| Power Dissipation | 600 mW |
| Storage Temperature | -65 °C – 150 °C |
| Timing Range | µSec to Hours |
The device can source up to 200 mA of output current.
Pin 6 (Threshold) is tied to Pin 2 (Trigger), Pin 4 (Reset) is tied to VCC (Pin 8), and an external capacitor C1 charges through resistors RA and RB; when C1 reaches 2/3 VCC the output goes low, and when it falls to 1/3 VCC the output goes high.