This document is the summary of DS2149 datasheet. DS2149 is a line interface unit from MAXIM company, supporting long-haul and short-haul T1 applications.
The DS2149 is a fully integrated line interface unit (LIU) for short‑haul and long‑haul T1/J1 applications. It supports both long‑haul and short‑haul line build‑outs, includes a crystal‑less jitter attenuator, and can be controlled via a serial interface or hardware pins.
This manual covers the device’s detailed description, operating modes, register definitions, transmitter and receiver functions, jitter attenuation, hardware and software modes, diagnostic features, network interface, DC characteristics, and package information. It also provides pin‑out diagrams, timing specifications, and configuration tables.
| Receive Sensitivity | 0 dB to -36 dB |
|---|---|
| CSU Filter Range | 0 dB to -22.5 dB |
| Jitter Attenuator FIFO Depth | 32 bits or 128 bits |
| TCLK Period | 648 ns |
| TCLK Pulse Width | 75 ns |
The receive sensitivity can be set from 0 dB down to –36 dB.
It offers four CSU filters ranging from 0 dB to –22.5 dB for line build‑out.