XRT72L53 Datasheet | Exar

SCRIPTION The XRT72L53, 3 Channel DS3/E3 Framer IC is designed to accept User Data from the Terminal Equipment and insert this data into the Payload bit-fields within an Outbound DS3/E3 Data Stream. Further, the Framer IC is also designed to receive an Inbound DS3/E3 Data Stream (from the Remote Terminal Equipment) and extract out the User Data. The XRT72L53 DS3/E3 Framer device is designed to support full-duplex data flow between Terminal Equipment and an LIU (Line Interface Unit) IC. The Framer Device will transmit, receive and process data in the DS3-C-bit Parity, DS3-M13, E3-ITU-T G.751 and E3ITU-T G.832 (November 1995 and October 1998 Revisions) Framing Formats. The XRT72L53 DS3/E3 Framer IC consists of three Transmit sections, three Receiver sections, three Performance Monitor Sections and a Microprocessor interface. The Transmit Sections, include a Transmit Payload Data Input Interface block, a Transmit Overhead Data Input Interface block, a Transmit HDLC Controller, a Transmit DS3/E3 Framer block and a Transmit LIU Interface Block which allows the Terminal Equipment to transmit data to a remote terminal. The Receive Sections, consist of a Receive LIU Interface, a Receive DS3/E3 Framer, a Receive HDLC Controller, a Receive Payload Data Output Interface, and a Receive Overhead Data Interface which allows FIGURE 1. BLOCK DIAGRAM OF THE XRT72L53 the local terminal equipment to receive data from remote terminal equipment. The Microprocessor Interface is used to configure the Framer in different operating modes and monitor the performance of the Framer. The Performance Monitor Sections consist of a large number of Reset-upon-Read and Read-Only registers that contain cumulative and One-Second statistics that reflect the performance/health of the three channels of the Framer IC/system. Features - Transmits, Receives and Processes data in the DS3-C-bit Parity, DS3-M13, E3-ITU-T G.751 and E3-ITU-T G.832 Framing Formats. - 3 Channel HDLC Controller - Tx and Rx -...