GENERAL DESCRIPTION

AK2305 is a dual PCM CODEC-Filter most suitable for ISDN Terminal Adapter. A-law/u-law is selected by the internal register. In addition to CODEC, this device has dual DTMF receiver and External Tone Input pin.

FEATURE

- Dual PCM CODEC and Filtering systems for

ISDN Terminal Adapter

- Dual DTMF Receiver

- External Tone Input(AUX)

- Independent functions on each channel

- Frame Sync Signal(8kHz)

- Power Down Mode(Pin/Register operation)

- Mute(Pin/Register operation)

- Gain Adjustment: 0 to -12dB (3dB step)

- Selectable PCM Data Interface Timing:

Long Frame / Short Frame / GCI / IDL

- Variable PCM Data Rate:

64k x N [Hz] (64k - 4.096MHz)

- Operational Amplifier for Gain Adjustment

- A-law/u-law Register Selectable

- Serial Interface

- Power on Reset

- Single +5V ± 5 CMOS technology

- Low Power Consumption (85mW typ)