DS26303L-120+

GENERAL DESCRIPTION

The DS26334 is a 16-channel short/long-haul line interface unit (LIU) that supports E1/T1/J1 from a single 3.3V power supply. A single bill of material can support E1/T1/J1 that requires no external termination. Redundancy is supported through nonintrusive monitoring, optimal high-impedance modes and configurable 1:1 or 1+1 backup enhancements. An on-chip synthesizer generates the E1/T1/J1 clock rates by a single master clock input of various frequencies. Two clock output references are also offered. The device is offered in a 256-pin TE-CSBGA, the smallest package available for a 16-channel LIU.

FEATURES

â–  16 E1, T1, or J1 Short/Long-Haul Line Interface Units
â–  Independent E1, T1 or J1 Selections
â–  Fully Internal Impedance Match Requires No External Resistors
â–  Software-Selectable Transmit and ReceiveSide Impedance Match
â–  Crystal-Less Jitter Attenuator
â–  Selectable Single-Rail and Dual-Rail Mode and AMI or HDB3/B8ZS Line Encoding and Decoding
â–  Detection and Generation of AIS
â–  Digital/Analog Loss of Signal Detection as per T1.231, G.775 and ETS 300 233
â–  External Master Clock Can Be Multiple of 2.048MHz or 1.544MHz for T1/J1 or E1 Operation; This Clock Will Be Internally Adapted for T1 or E1 Usage
â–  Receiver Signal Level Indicator from -2.5dB to -38dB in T1 Mode and -3dB to -43dB in E1 Mode in 2.5dB Increments
â–  Two Built-In BERT Testers for Diagnostics
â–  8-Bit Parallel Interface Support for Intel or Motorola Mode or a 4-Wire Serial Interface
â–  Transmit Short-Circuit Protection
â–  G.772 Nonintrusive Monitoring
â–  Receive Monitor Mode Handles Combinations of 14dB to 30dB of Resistive Attenuation Along with 12dB to 30dB of Cable Attenuation
â–  Specification Compliance to the Latest T1 and E1 Standards
â–  Single 3.3V Supply with 5V Tolerant I/O
â–  JTAG Boundary Scan as Per IEEE 1149.1

APPLICATIONS

T1 Digital Cross-Connects
ATM and Frame Relay Equipment
Wireless Base Stations
ISDN Primary Rate Interface
E1/T1/J1 Multiplexer and Channel Banks
E1/T1/J1 LAN/WAN Routers