The DS32506 (6 port), DS32508 (8 port), and DS32512 (12 port) line interface units (LIUs) are highly integrated, low-power, feature-rich LIUs for DS3, E3, and STS-1 applications. Each LIU port in these devices has independent receive and transmit paths, a jitter attenuator, full-featured pattern generator and detector, performance-monitoring counters, and a complete set of loopbacks. An on-chip clock adapter generates all line-rate clocks from a single input clock. Ports are independently software configurable for DS3, E3, and STS-1 and can be individually powered down. Control interface options include 8-bit parallel, SPI™, and hardware mode.
Key Features
Applications/Uses
Pin-Compatible Family of Products
Each Port Independently Configurable
Receive Clock and Data Recovery for Up to 457 meters (1500 feet) of 75Ω Coaxial Cable
Standards-Compliant Transmit Waveshaping
Uses 1:1 Transformers on Both Tx and Rx
Three Control Interface Options: 8/16-Bit Parallel, SPI, and Hardware Mode
Jitter Attenuators (One Per Port) Can be Placed in the Receive Path or the Transmit Path
Jitter Attenuators Have Provisionable Buffer Depth: 16, 32, 64, or 128 Bits
Built-In Clock Adapter Generates All Line-Rate Clocks from a Single Input Clock (DS3, E3, STS-1, 12.8MHz, 19.44MHz, 38.88MHz, 77.76MHz)
Per-Port Programmable Internal Line Termination Requiring Only External Transformers
High-Impedance Tx and Rx, Even When VDD = 0, Enables Hot-Swappable, 1:1 and 1+1 Board Redundancy Without Relays
Per-Port BERT for PRBS and Repetitive Pattern Generation and Detection
Tx and Rx Open and Short Detection Circuitry
Transmit Driver Monitor Circuitry
Receive Loss-of-Signal (LOS) Monitoring Compliant with ANSI T1.231 and ITU G.775
Automatic Data Squelching on Receive LOS
Large Line Code Performance-Monitoring Counters for Accumulation Intervals Up to 1s
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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