The DS26401 is an octal, software-selectable T1, E1, or J1 framer. It is composed of 8 framer/formatters and a system (backplane) interface. Each framer has an HDLC controller that can be mapped to any DS0 or FDL (T1)/Sa (E1) bit. The DS26401 also includes a full-feature BERT device, which can be used with any of the 8 T1/E1 ports, and an internal clock adapter useful for creating synchronous, high-frequency backplane timing. The DS26401 is controlled through an 8-bit parallel port that can be configured for nonmultiplexed Intel or Motorola operation. Applications * Add/Drop Multiplexers * Automatic Teller Machine Systems * Central Office Equipment * Customer Premise Equipment * DSLAM Backplane * IMA * Line Cards * PBXs * Routers/Switches * Routers/Switches * Timing Systems * WAN Interface * 8 Independent, Full-Featured T1/E1/J1 Framers/Formatters * Independent Transmit and Receive Paths * Flexible Signaling Extraction and Insertion * Alarm Detection and Insertion * Transmit Synchronizer * AMI, B8ZS, HDB3, NRZ Line Coding * Performance Monitor Counters * BOC Message Controller (T1) * Two-Frame Elastic Store Buffers for Each Transmitter and Receiver * One HDLC Controller per Framer * RAI-CI and AIS-CI Support * Full-Feature BERT can be Mapped to Any Port * Flexible TDM Backplane Supports Bus Rates from 1.544MHz to 16.384MHz * Internal Clock Generator (CLAD) Supplies 16.384MHz, 8.192MHz, 4.096MHz, or 2.048MHz * JTAG Test Port * Single 3.3V Supply with 5V Tolerant Inputs * 17mm x 17mm, 256-Pin BGA (1.00mm Pitch)