GENERAL DESCRIPTION

The MSM7570-01, developed for advanced digital cordless telephone systems, is a single channel ADPCM CODEC IC which performs mutual transcoding between the analog voice band signal and 32 kbps ADPCM serial data. This device includes 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 ciruit technology, the device operates using a single 5 V power supply and have low power consumption.

FEATURES

• Single 5 V Power Supply Operation VDD: 4.5 V to ␣ 5.5 V

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

• Transmit/Receive Full-Duplex Single Channel 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 : 70 mW Typ. (VDD = 5.0 V)

Power-Down Mode : 0.5 mW Typ. (VDD = 5.0 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: MSM7570-01TS-K)