DS26334 Datasheet | Dallas Semiconductor

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 16 E1, T1, or J1 Short/Long-Haul Line Interface Units Independent E1, T1 or J1 Selections Fully Internal Impedance Match Requires No External Resistors Software-Selectable Transmit and Receive Side Impedance Match Crystal-Less Jitter Attenuator Selectable Single-Rail and Dual-Rail Mode and AMI or HDB3/B8ZS Line Encoding and Decoding Detection and Generation of AIS Digital/Analog Loss of Signal Detection as per T1.231, G.775 and ETS 300 233 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 Receiver Signal Level Indicator from -2.5d B to -38d B in T1 Mode and -3d B to -43d B in E1 Mode in 2.5d B Increments Two Built-In BERT Testers for Diagnostics 8-Bit Parallel Interface Support for Intel or Motorola Mode or a 4-Wire Serial Interface Transmit Short-Circuit Protection G.772 Nonintrusive Monitoring Receive Monitor Mode Handles binations of 14d B to 30d B of Resistive Attenuation Along with 12d B to 30d B of Cable Attenuation Specification pliance to the Latest T1 and E1 Standards- ANSI T1.102, AT&T Pub 62411, T1.231, T1.403, ITU-T G.703, G.742, G.775, G.823, ETS 300 166, and ETS 300 233 Single 3.3V Supply with 5V Tolerant I/O JTAG Boundary Scan as Per IEEE 1149.1 APPLICATIONS T1 Digital Cross-Connects ATM and Frame Relay Equipment Wireless Base Stations ISDN Primary...