TS75C250

The TS75C250 is a single-chip analog front-end designed to implement high-performance vioce-grade modems.Associated with a digital signal processor such as TS68930/31 or ST18930/31,it provides a cost-effective and powerful solution for implementetion of multi-mode modems including CCITT V.21, V.22, V.22bis,V.23,V.26,V.27,V.29,V.33 and Bell 103,202 and 212 A standards.

Features of the TS75C250 can be summarized as:(1)12 bit A/D and D/A converters with programmable sampling frequency:7.2,8.0, or 9.6 KHz;(2)6th order switched capacitor transmit filter;(3)transmit attenuator programmable from 0 dB to 22 dB with 2 dB step;(4)duplexer output available with programmable attenuation;(5)15th order switched capacitor rxfilter(programmable);(6)two programmable gain Rx amplifiersLfrom 0 db to 9 db with 3 db step before Rx filter and from 0 db to 46.5 db with 1.5 db step after Rx filter;(7)programmable carrier level detector;(8)on chip anti-aliasing cells(transmitand receive);(9)two independant transmit and receive digital phase locked loops(dplls);(10)terminal clock input for transmit synchronization;(11)three available output clocks:bit,baud and conversion clock;(12)DSP interface through 8 bit standard bus for both signal samples and control register access;(13)automatic reset on power-on;(14)250 mW typical power consumption.

If you want to know more information such as the absolute maximum ratings and electrical charactrical of the TS75C250, please download the datasheet in www.chinaicmart.com and www.seekic.com