GENERAL DESCRIPTION

The MSM7570L-01/02, developed for advanced digital cordless telephone systems, are single channel ADPCM CODEC ICs which perform mutual transcoding between the analog voice band signal and 32 kbps ADPCM serial data.

The devices include DTMF Tone and several types of tone generation, transmit/receive data mute and gain control, side-tone path and gain control, and VOX function. Using advanced circuit technology, these devices operate from a single 3 V power supply and provide low power consumption.

FEATURES

• Single 3 V Power Supply Operation VDD: 2.7 V to ␣ 3.6 V

• ADPCM Algorithm : ITU-T G.726 (32 kbps, 24 kbps, 16 kbps)•

• Full-Duplex Transmit/Receive Operation

• Transmit/Receive Synchronous Mode Only•

• PCM Data Format : A-law/µ-law Selectable

• Serial PCM/ADPCM Transmission Data Rate :64 kbps to 2048 kbps•

• Low Power Consumption

   Operating Mode : 21 mW Typ. (VDD = 3.0 V)

   Power-Down Mode : 0.3 mW Typ. (VDD = 3.0 V)

• Two Analog Input Amplifier Stages : Externally Adjustable Gain•

• Analog Output Stage : Push-pull Drive (direct drive of 350 W␣ + 120 nF)

• Master Clock Frequency : 12.288/19.200 MHz Selectable•

• Transmit/Receive Mute, Transmit/Receive Programmable Gain Control

• Side Tone Path with Programmable Attenuation (8-step Level Adjustment)•

• Built-in DTMF Tone Generator

• Built-in Various Ringing/Function Tones Generator•

• Built-in Various Ring Back Tone Generator

• Serial MCU Interface Control•

• Built-in Sounder Driving Amplifier

• Built-in VOX Control

   Transmit side : Voice Signal Detect

   Receive side : Background Noise Generation

• Characteristic Evaluation Board.

• Package:

   32-pin plastic TSOP (TSOPI32-P-814-0.50-1K) (Product name: MSM7570L-01TS-K)

                                                              (Product name: MSM7570L-02TS-K)