STMicroelectronics

SA555N

SA555N Description

The SA555N from STMicroelectronics is a precision 555-type timer/oscillator IC designed for reliable timing and pulse generation applications. Packaged in an 8-DIP through-hole format, this obsolete but robust component operates within a 4.5V to 16V supply range, delivering a 500kHz frequency with a 10mA supply current. Its ROHS3 compliance and REACH-unaffected status ensure environmental safety, while its Moisture Sensitivity Level (MSL 1) guarantees durability in varied storage conditions. Ideal for legacy designs, the SA555N excels in stability and ease of integration, making it a preferred choice for engineers seeking proven performance in timing circuits.

SA555N Features

• Wide Voltage Range (4.5V–16V): Supports flexible power supply configurations.
• High Frequency (500kHz): Enables precise timing for rapid oscillations.
• Low Supply Current (10mA): Optimizes power efficiency in battery-operated systems.
• Through-Hole Mounting (8-DIP): Simplifies prototyping and breadboarding.
• Industrial Compliance: ROHS3 and REACH-unaffected, ensuring regulatory adherence.
• Obsolete but Reliable: Backed by STMicroelectronics’ legacy of quality, though newer alternatives may exist.

SA555N Applications

The SA555N is particularly suited for:

1. Pulse Generation: Used in waveform shaping and clock signal production.
2. Precision Timing: Ideal for delay circuits, sequential timing, and industrial automation.
3. Oscillator Circuits: Functions in astable/monostable configurations for LED flashers, tone generators, and PWM controllers.
4. Legacy System Maintenance: Supports repairs or upgrades of older electronics where modern SMD alternatives are incompatible.

Conclusion of SA555N

While marked obsolete, the SA555N remains a dependable solution for through-hole designs requiring high-frequency timing with low power consumption. Its wide voltage tolerance and ease of use make it a staple in educational labs, industrial controls, and hobbyist projects. Engineers valuing proven performance over cutting-edge form factors will find the SA555N a pragmatic choice, though sourcing may require alternative suppliers due to its discontinued status.