PEB2045 - Siemens Semiconductor

PEB2045 Memory Time Switch CMOS

The PEx 2045 is a memory time switch device. It can connect any of 512 PCM input channels to any of 256 output channels. The input information of a complete frame is stored in the on-chip 4-Kbit speech memory SM (see figure 8). The incoming 512 channels of 8 bits each are written in sequence into fixed positions in the SM. This is controlled by the input co.

Features

systems q Time/space switch for 2048-, 4096- or 8192-kbit/s PCM q Switching of up to 512 incoming PCM channels to up to 256 outgoing PCM channels q 16-input and 8-output PCM lines q Different kinds of modes (2048, 4096, 8192 kbit/s or mixed q q q q q q q q q q q mode) Configurable for primary access and standard applications Programmable clock shift with half clock step resolution for input and output in primary access configuration Configurable for a 4096- and 8192-kHz device clock Tristate function for further expansion and tandem operation Tristate control signals for external drivers in.