ISDN CTLR HDLC S/T 8192Kbps 5V 80-Pin MQFP

The PEB 20550 (Extended Line Card Controller) is a highly integrated controller circuit optimized for line card and key system applications. It combines all functional blocks necessary to manage up to 32 digital (ISDN or proprietary) or 64 analog subscribers. The switching and layer-1 control capability of the EPIC-1 (PEB 2055) constitutes a major functional block of the ELIC. For layer-2 support, two independent Special Application Communication Controllers (SACCO) are available. One typically handles the communication with the group controller, the other is used to serve the subscriber terminals. A D-channel arbiter is employed to multiplex the HDLC controller between multiple subscribers while maintaining full duplex signaling protocols (e.g. LAPD). Additionally, typical line card glue logic functions such as a power-up reset generator, a watchdog timer and two parallel ports are integrated. The ELIC is implemented in a Siemens advanced 1.0-µm CMOS-technology and manufactured in a P-MQFP-80-1 package. The ELIC is a member of a new chip family supporting D-channel multiplexing on the line card and in the subscriber terminal. This concept allows an highly economical implementation of digital subscriber lines.

• Non-blocking switch for 32 digital (e.g. ISDN) or 64 voice subscribers – Bandwidth 16, 32, or 64 kbit/s – Two consecutive 64-bit/s channels can be switched as a single 128-kbit/s channel
• Freely programmable time slot assignment for all subscribers
• Synchronous µP-access to two selected channels
• Two types of serial interfaces independently programmable over a wide data range (128 - 8192 kbit/s)
  • PCM-interface Tristate control signals for external drivers Programmable clock shift Single or double data clock
  • Configurable interface Configurable for IOM-, SLD- and PCM-applications High degree of flexibility for data stream adaption Programmable clock shift Single or double data clock