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2012-08-06

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System Logic SL34118 Voice Switched Speakerphone Circuit Manual

Application Note 12 pages · 140 KB · EN

The SL34118 integrates amplifiers, attenuators, level detectors and control logic to enable a high‑quality hands‑free speakerphone. It supports line‑powered operation (5 mA typical) or external supply, and provides features such as microphone gain control, mute, chip‑disable, dial‑tone detection and background‑noise monitoring.

The document details the functional blocks (filter, hybrid amplifiers, microphone amplifier, attenuator control), pin descriptions, electrical characteristics and operation modes (transmit, receive, fast idle, slow idle). Designers can configure gain, thresholds and timing via external components and resistors.

Covers: Simplified Block Diagram · Functional Description · Attenuators · Level Detectors · Background Noise Monitors · Volume Control

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• System Logic SL34118 Voice Switched Speakerphone Circuit Manual

  Application Note 12 pages · 140 KB · EN

  Technical description of the SL34118 voice‑switched speakerphone IC, including functional blocks, pinout and key specifications.

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