Datasheet Summary
DS21448 3.3V E1/T1/J1 Quad Line Interface
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GENERAL DESCRIPTION
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. The transmit drivers generate the necessary G.703 E1 waveshapes in 75W or 120W applications and the DSX-1 or CSU line build-outs of 0dB, -7.5dB, -15dB, and -22.5dB for T1 applications. The DS21448 has a usable receiver sensitivity of 0 to -43dB for E1 applications and 0 to -36dB for T1 that allows it to operate on 0.63mm (22AWG) cables up to 2.5km (E1) and 6000ft (T1) in length. The...
