AK2307LV

Codecs Overview

The AK2307LV is an integrated speech codec LSI designed for digital key telephones and VoIP systems. It combines a PCM CODEC compliant with ITU specifications, voice path control, microphone amplifiers, and handset drivers. The device supports A-law and u-law compression selectable via serial interface registers. It features a programmable tone generator and handles both long/short frame formats and GCI interfaces. Power supply options include 5.0V +/-5% or 3.3V +/-0.3V single supply configurations.

Codecs Feature Summary

• Integrated dual microphone amplifiers for handset and external microphone inputs
• Built-in 150 ohm handset driver and additional driver for headset receivers
• Programmable tone generator supporting service tones, DTMF, and melody generation
• Comprehensive voice path control and volume adjustment via serial CPU interface

Codecs Applications

• PBX and KTS digital key telephones
• VoIP telephone systems
• Digital handsets requiring integrated audio processing

Codecs Procurement Notes

Verify the specific voltage variant required, as the LV suffix denotes the 3.3V version distinct from the standard 5.0V part. Confirm package availability in 28-pin VSOP format. Check for obsolescence notices or alternative sourcing channels due to the component's age. Ensure serial interface timing requirements align with the host processor capabilities.

Codecs Selection Notes

Select this component when a combined codec and analog front-end solution is needed for telephony applications. The choice between A-law and u-law depends on regional telecommunication standards. Consider the internal tone generator capability if external tone synthesis is undesirable. Verify power supply constraints match the 3.3V specification of the LV variant.

Codecs Part Context

This device belongs to Asahi Kasei Microdevices' speech codec family tailored for fixed-line and IP telephony. It integrates functions typically handled by separate components, such as ADC/DAC, amplification, and switching. The design targets cost-sensitive and space-constrained telephone hardware implementations.

Codecs Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult manufacturer archives for direct replacements or evaluate generic speech codecs with compatible pinouts and register maps.