STMicroelectronics

M34116B1

M34116B1 Description

The M34116B1 from STMicroelectronics is an obsolete PCM Conference/Tone Generation Circuit IC designed for telecom applications. Packaged in a 24-pin DIP (Through Hole) and supplied in tubes, this single-circuit interface operates within a 4.75V–5.25V range with a 50mA current supply, delivering 500mW power dissipation. Its 0°C to 70°C operating temperature range ensures stable performance in standard environments. The device complies with EAR99 ECCN and REACH Unaffected regulations, making it suitable for legacy systems requiring compliance with environmental and export controls.

M34116B1 Features

• PCM Interface: Enables pulse-code modulation for high-fidelity audio signal processing in telecom systems.
• Low Power Consumption: Optimized 500mW power dissipation reduces thermal load in compact designs.
• Wide Voltage Tolerance: Operates reliably across 4.75V–5.25V, accommodating minor supply fluctuations.
• Through-Hole Mounting: Robust 24DIP package ensures mechanical stability in industrial applications.
• Moisture-Resistant: MSL 1 (Unlimited) rating allows extended storage without humidity concerns.
• Legacy Compliance: Meets HTSUS 8542.39.0001 and EAR99 standards for global deployment.

M34116B1 Applications

• Telecom Conferencing Systems: PCM-based audio processing for multi-party voice communication.
• Tone Generation: DTMF or call-progress tone synthesis in PBX and central office equipment.
• Legacy Network Equipment: Maintenance or repair of older telecom infrastructure.
• Industrial Control Interfaces: Reliable signal conditioning in harsh environments.

Conclusion of M34116B1

The M34116B1 is a specialized telecom IC offering PCM-based conferencing and tone generation with robust electrical and mechanical characteristics. While obsolete, its low-power operation, wide voltage range, and compliance make it a pragmatic choice for legacy systems or niche applications where modern replacements are impractical. Engineers maintaining vintage telecom hardware will find it indispensable for its reliability and standardized interface.