2017-11-16

ZTE ZXDSL 852 modem

ADSL USB modem, quite popular in Poland.

 Single screw to open.




 It is based on Unicorn II chipset from ST Microelectronics: ST70138 DMT engine and USB 1.1 controller and MTC20174 AFE (Analog Front-End: 12-bit 8.8Msamples/s DAC, 13-bit 8.8Msamples/s ADC, PGAs, filters, DCXO, PLL, line driver).
 Atmel 93C66A: 4kbit SPI EEPROM

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