The CA555 and CA555C are highly stable timers for use in precision timing and oscillator applications. As timers, these monolithic integrated circuits are capable of producing accurate time delays for periods ranging from microseconds through hours. These devices are also useful for astable oscillator operation and can maintain an accurately controlled free running frequency and duty cycle with only two external resistors and one capacitor. The circuits of the CA555 and CA555C may be triggered by the falling edge of the waveform signal, and the output of these circuits can source or sink up to a 200mA current or drive TTL circuits. These types are direct replacements for industry types in packages with similar terminal arrangements e.g. SE555 and NE555, MC1555 and MC1455, respectively. The CA555 type circuits are intended for applications requiring premium electrical performance. The CA555C type circuits are available for applications requiring adjustable output current.
The document describes the CA555 family of monolithic timer integrated circuits, covering both the standard (CA555, LM555, NE555) and the low‑temperature (CA555C, LM555C, NE555C) versions. It lists key features such as accurate timing from microseconds to hours, adjustable duty cycle, and the ability to source or sink up to 200 mA.
Technical data include absolute maximum ratings, electrical specifications, pinouts for PDIP, SOIC and metal‑can packages, and typical application circuits for monostable (reset timer) and astable (repeat‑cycle timer) operation. Performance curves illustrate timing accuracy versus temperature, supply voltage, and component values.
| Supply Voltage Range | 4.5 V – 16 V |
|---|---|
| Maximum Output Current | 200 mA |
The device can source or sink up to 200 mA.
It operates from 4.5 V up to 16 V.