Description
DS21448 3.3V E1/T1/J1 Quad Line Interface www.maxim-ic.com GENERAL .
The DS21448 is a quad-port E1 or T1 line interface unit (LIU) for short-haul and long-haul applications.
Features
* Four Complete E1, T1, or J1 LIUs Supports Long- and Short-Haul Trunks Internal Software-Selectable Receive-Side Termination for 75W/100W/120W 3.3V Power Supply 32-Bit or 128-
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 a