DS21Q48

DS2148/DS21Q48 5V E1/T1/J1 Line Interface www.maxim-ic.com FEATURES § § § § § Complete E1, T1, or J1 line interface unit (LIU) Supports both long- and short-haul trunks Internal software-selectable receive-side termination for 75Ω/100Ω/120W 5V power supply 32-bit or 128-bit crystal-less jitter attenuator requires only a 2.048MHz master clock for both E1 and T1 with option to use 1.544MHz for T1 Generates the appropriate line build outs, with and without return loss, for E1 and DSX-1 and CSU line build outs for T1 AMI, HDB3, and B8ZS, encoding/decoding 16.384MHz, 8.192MHz, 4.096MHz, or 2.048MHz clock output synthesized to recovered clock Programmable monitor mode for receiver Loopbacks and PRBS pattern generation/ detection with output for received errors Generates/detects in-band loop codes, 1 to 16 bits including CSU loop codes 8-bit parallel or serial interface with optional hardware mode Multiplexed and nonmultiplexed parallel bus supports Intel or Motorola Detects/generates blue (AIS) alarms NRZ/bipolar interface for TX/RX data I/O Transmit open-circuit detection Receive Carrier Loss (RCL) indication (G.775) High-Z State for TTIP and TRING 50mA (rms) current limiter PIN DESCRIPTION 44 1 44 TQFP § § § § § § § § § § § § § § 7mm CABGA ORDERING INFORMATION Single-Channel Devices: DS2148TN 44-Pin TQFP DS2148T 44-Pin TQFP DS2148GN 7mm CABGA DS2148G 7mm CABGA Four-Channel Devices: DS21Q48N (Quad) BGA DS21Q48 (Quad) BGA (-40°C to +85°C) (0o C to +70o C) (-40°C to +85°C) (0o...