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 M...
MSM7603: 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 ..........
SeekIC Buyer Protection PLUS - newly updated for 2013!
268 Transactions
All payment methods are secure and covered by SeekIC Buyer Protection PLUS.
Features: •Single power supply: +5 V ±5%•Low power consumption Operating mode: 20 mW ...
Symbol |
Parameter |
Conditions |
Limits |
Unit |
VDD |
Power Supply Voltage |
Ta = 25°C
|
_0.3 to +7 |
V |
VIN |
Input Voltage |
0.3 to VDD + 0.3 |
V | |
PD |
Power Dissipation |
1 |
W | |
TSTG |
Storage Temperature |
- |
55 to +150 |
°C |
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 of MSM7603 is canceled, in digital signal processing, by estimating the echo path and generating a pseudo echo signal.When used as an acoustic echo canceler, the MSM7603 can cancel the acoustic echo, between the loud speaker and the microphone, which occur during hands free communication such as on a cellular phone or a conference system phone.
When used as a line echo canceler, the MSM7603 can cancel the line echo which returns due to impedance mismatching in a hybrid.
In addition, a quality conversation of MSM7603 is made possible by controlling the level and by preventing howling through a howling detector, double talk detector, attenuation function and a gain control function, and by controlling the low level noise by means of a center clipping function.
The use of a single chip codec, such as the MSM7704 (3 V) and MSM7533 (5 V), allows an economic and efficient echo canceler to be configured.