GENERAL DESCRIPTION
The MSM7508B and MSM7509B are single-channel CODEC CMOS ICs for voice signals ranging from 300 to 3400 Hz. These devices contain filters for A/D and D/A conversion. Designed especially for a single-power supply and low-power applications, these devices are optimized for telephone terminals in ISDN and digital wireless systems. The MSM7508B/MSM7509B are the transmission-clocks extended versions of the MSM7508/MSM7509. It is recommended to use the MSM7508/MSM7509 for the transmission clocks of 64, 128, 256kHz.

FEATURES
• Single power supply: +5 V ±5%
• Low power consumption
   Operating mode: 17.5 mW Typ. 37 mW Max.
   Power down mode: 1.5 mW Typ. 3 mW Max.
• ITU-T Companding law
   MSM7508B: m-law
   MSM7509B: A-law
• Built-in PLL eliminates a master clock
• Transmission clock: 64/128/256/512/1024/2048 kHz
                            96/192/384/768/1536/1544/200 kHz
• Adjustable transmit gain
• Built-in reference voltage supply
• Package options:
   16-pin plastic DIP (DIP16-P-300-2.54-W1) (Product name : MSM7508BRS)
                                                          (Product name : MSM7509BRS)
   24-pin plastic SOP (SOP24-P-430-1.27-K) (Product name : MSM7508BGS-K)
                                                         (Product name : MSM7509BGS-K)
   28-pin plastic QFJ (PLCC) (QFJ28-P-S450-1.27) (Product name : MSM7508BJS)
                                                               (Product name : MSM7509BJS)