The DS21448 is a quad-port E1 or T1 line interface unit (LIU) for short-haul and long-haul applications. It incorporates four independent transmitters and four independent receivers in a single 144-pin PBGA or 128-pin LQFP package. It has a usable receiver sensitivity range of 0 to -43dB for E1 applications and 0 to -36dB for T1 applications. It supports both internal and external receive termination and has diagnostic capabilities such as loopbacks and PRBS pattern generation and detection.
The DS21448 is a quad-port E1 or T1 line interface unit (LIU) designed for short-haul and long-haul applications. It incorporates four independent transmitters and four independent receivers in a single 144-pin PBGA or 128-pin LQFP package. The device supports both E1 and T1 line build-outs and includes features such as internal software-selectable receive-side termination and a crystal-less jitter attenuator.
| Voltage | 3.3V |
|---|---|
| Package | 144-pin PBGA or 128-pin LQFP |
| Power Supply | 3.3V |
| Clock Frequency | 2.048MHz or 1.544MHz |
| Interface | 8-bit Parallel or Serial |
The DS21448 supports E1, T1, or J1 line interfaces.
Yes, it has an on-board crystal-less jitter attenuator.