AK2500B

ASAHI KASEI [AK2500B] AK2500B DS3/STS-1 Analog Line Receiver GENERAL DESCRIPTION The AK2500B is a DSP based line receiver. It provides the analog receive line interface functions for a 44.736 MHz DS3 or 51.84 MHz STS-1 interface. The device operates from a single +3.3 Volt supply and is transparent to the framing format. - FEATURE “Robust” DSP based line receiver AK2500B Provides Complete Analog Line Receiver for DS3 and STS-1 Applications Provides Line Equalization, and Clock and Data Recovery Functions PACKAGE 24 pin SOP APPLICATIONS Interfacing network transmission equipment such as SONET multiplexor and M13 to a DSX3 cross connect. Interfacing customer premises equipment to a line. - BLOCK DIAGRAM RLOL TREF BREF IREF RCLK CLOCK RECOVERY EXCLK RPDATA RNDATA DATA RECOVERY GAIN and LINE EQUALIZATION RIN VDDA VSSA VDDD VSSD VDDC VSSC LOSTHR RLOS MODE2 MODE1 RESET LOS LOGIC MS0005-E-00 -1- 1999/12 ASAHI KASEI [AK2500B] PIN LOCATION 24 PIN SOP Package IREF LOSTHR RLOL RIN VDDA VDDA RESET BREF TREF VSSA VSSD RLOS 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 MODE2 MODE1 VSSA VSSA VSSC RPDATA RNDATA RCLK VDDC VDDA VDDD EXCLK AK2500B 18 17 16 15 14 13 MS0005-E-00 -2- 1999/12 ASAHI KASEI [AK2500B] PIN CONDITION No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Note: 1)External resister 4.9 kohm is connected between IREF and VSS. 2)Input impedance of RIN is more than 5kohm. 3)Pulled up to VDD with internal register. (typical 50k...