GENERAL DESCRIPTION
The MSM7603/7603B is an improved version of the MSM7602 with basically the same configuration, and offers twice the cancelable echo delay time of the MSM7602.
The MSM7603B I/O interface allows switching between m-law PCM and A-law PCM.
The MSM7603/7603B is a low-power CMOS IC device for canceling echo (in an acoustic system or telephone line) generated in a speech path.
Echo is canceled, in digital signal processing, by estimating the echo path and generating a pseudo echo signal.

FEATURES
• Can handle both acoustic and telephone line echoes.
• Switchable between m-law PCM and A-law PCM interfaces. (MSM7603B)
• Cancelable echo delay time: MSM7603B-003 .............. 55 ms (max.)
• Echo attenuation : 30 dB (typ.)
• Clock frequency : 19.2 MHz
                               17.5 MHz to 20 MHz (when internal sync signal not used)
• Power supply voltage : 2.7 V to 5.5 V
• Package:
    28-pin plastic SSOP (SSOP28-P-485-0.65-K) (Product name : MSM7603-003GS-K)
                                                                        (Product name : MSM7603B-003GS-K)