General Description
The four Channel CODEC Filter PEB 2465 SICOFI-4 is the logic continuation of a wellestablished family of SIEMENS codec-filter-ICs. The SICOFI-4 is a fully integrated PCM CODEC and FILTER fabricated in low power 1µ CMOS technology for applications in digital communication systems. Based on an advanced digital filter concept, the PEB 2465 provides excellent transmission performance and high flexibility. The new filter concept (second generation) lends to a maximum of independence between the different filter blocks. Each filter block can be seen like an one to one representative of the corresponding network element.

FEATUREs
• Single chip CODEC and FILTER to handle four CO- or PABX-channels
• Specification according to relevant CCITT, EIA and LSSGR recommendations
• Digital signal processing technique
• Programmable interface optimized to current feed SLICs and transformer solutions
• Four pin serial IOM-2 Interface
• Single power supply 5 V
• Advanced low power 1 µm analog CMOS technology
• Standard 64 pin P-MQFP-64 package
• High performance Analog to Digital Conversion
• High performance Digital to Analog Conversion
• Programmable digital filters to adapt the transmission behavior especially for
– AC impedance matching
– transhybrid balancing
– frequency response
– gain
• Advanced test capabilities
– all digital pins can be tested within a boundary scan scheme (IEEE 1149.1)
– five digital loops
– four analog loops
– two programmable tone generators per channel
• Comprehensive Development Platform available
– software for automatic filter coefficient calculation - QSICOS
– Hardware development board - STUT 2465