Q4401

The Q4401 is designed as variable rate vocoder which is a full-diplex speech encoder and decoder that produces near toll-quality speech at compress data rates of under 9.6 kilobits per second. It provedes a single-chip solution to the speech compression requirements for digital telephone, wireless communications, voice storage, and speech synthesis systems. It uses the proprietary QUALCOMM codebook excited linear predictive speech coding algorithm to achieve high speech quality at low data rates.

Some absolute maximum ratings of Q4401 have been concluded into several points as follow. The first one is about its storage temperature range which would be from -65°C to +150°C. The next one is about its operating temperature range which would be from -40°C to +85°C. The next one is about its junction temperature which would be max +125°C. The next one is about its voltage on any input pin which would be min -0.5V and max +5.75V. It should be noted that stresses above those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operational sections of thos specifications is not implied.

Also there are some DC characteristics about Q4401. The first one is about its supply voltage which would be min 4.75V and max 5.25V. The next one is about its high level input voltage (non-clock inputs) which would be min 0.7 X Vdd. The next one si about its low level input voltage (non-clock inputs) which would be max 0.3 X Vdd V. The next one si about its colck high level input voltage (CMOS input) which would be min 0.7 X Vdd V. The next one is about its colck low level input voltage (CMOS input) which would be max 0.3 X Vdd V. And so on. For more information please contact us.