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DS2148T Datasheet(PDF) 1 Page - Dallas Semiconductor |
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DS2148T Datasheet(HTML) 1 Page - Dallas Semiconductor |
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1 / 75 page  1 of 75 REV: 082504 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/120 W § 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 ORDERING INFORMATION Single-Channel Devices: DS2148TN 44-Pin TQFP (-40 °C to +85°C) DS2148T 44-Pin TQFP (0o C to +70o C) DS2148GN 7mm CABGA (-40 °C to +85°C) DS2148G 7mm CABGA (0o C to +70o C) Four-Channel Devices: DS21Q48N (Quad) BGA (-40 °C to +85°C) DS21Q48 (Quad) BGA (0o C to +70oC) 44 TQFP 7mm CABGA 1 44 DS2148/DS21Q48 5V E1/T1/J1 Line Interface www.maxim-ic.com |
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