Infineon PEB2045NVA3SMTSC

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. The incoming 512 channels of 8 bits each are written in sequence into fixed positions in the SM. This is controlled by the input counter in the timing control block with a 8-kHz repetition rate. For outputting, the connection memory (CM) is read in sequence. Each location in CM points to a location in the speech memory. The byte in this speech memory location is read into the current output time-slot. The read access of the CM is controlled by the output counter which also resides in the timing control block. Hence the CM needs to be programmed beforehand for the desired connection. The CM address corresponds to one particular output time-slot and line number. The contents of this CM-address points to a particular input time-slot and line number.

• Time/space switch for 2048-, 4096- or 8192-kbit/s PCM systems
• Switching of up to 512 incoming PCM channels to up to 256 outgoing PCM channels
• 16-input and 8-output PCM lines
• Different kinds of modes (2048, 4096, 8192 kbit/s or mixed 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 primary access configuration
• 2048-kHz clock output in primary access configuration
• Space switch mode
• 8-bit μP interface
• Single +5 V power supply
• Advanced low power CMOS technology
• Pin and software compatible to the PEB 2040
• 4096-kHz device clock
• 4096-kbit/s PCM-data rate
• Primary access configuration
• Fast connection memory access

• Switches
• Primary access units
• Digital switching system