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Maxim > Products > T/E Carrier and Packetized Communications 
DS2148, DS21Q48
5V E1/T1/J1 Line Interface


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Data Sheet
FULL DATA SHEET (PDF, 1.1MB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Errata
  • Errata DS2148 2148_Q48A2.pdf 
  • Errata DS21Q48 2148_Q48A2.pdf 
  • Errata DS2148 2148_Q48C1.pdf 
  • Errata DS21Q48 2148_Q48C1.pdf 

    • Description
    The DS2148 is a complete selectable E1 or T1 Line Interface Unit (LIU) for short- and long-haul applications. Throughout the data sheet, J1 is represented wherever T1 exists. Receive sensitivity adjusts automatically to the incoming signal and can be programmed for 0dB to 12dB or 0dB to 43dB for E1 applications and 0dB to 30dB or 0dB to 36dB for T1 applications. The device can generate the necessary G.703 E1 waveshapes in 75Ω or 120Ω applications and DSX-1 line build outs or CSU line build outs of 0dB, -7.5dB, -15dB, and -22.5dB for T1 applications. The crystal-less onboard jitter attenuator requires only a 2.048MHz MCLK for both E1 and T1 applications (with the option of using a 1.544MHz MCLK in T1 applications). The jitter attenuator FIFO is selectable to either 32 bits or 128 bits in depth and can be placed in either the transmit or receive data paths. An X 2.048MHz output clock synthesized to RCLK is available for use as a backplane system clock (where n = 1, 2, 4, or 8). The DS2148 has diagnostic capabilities such as loopbacks and PRBS pattern generation/detection. 16-bit loop-up and loop-down codes can be generated and detected. The device can be controlled via an 8-bit parallel muxed or nonmuxed port, serial port or used in hardware mode. The device fully meets all of the latest E1 and T1 specifications including ANSI T1.403-1999, ANSI T1.408, AT&T TR 62411, ITU G.703, G.704, G.706, G.736, G.775, G.823, I.431, O.151, O.161, ETSI ETS 300 166, JTG.703, JTI.431, JJ-20.1, TBR12, TBR13, and CTR4.

    Key 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/120Ω
    • 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

    Key Specifications:   T/E Carrier & Packetized Products
    Part Number Transmission Standard Functions Number of Channels 5V-Tolerant I/O Supply Voltage (V) EV-Kit RoHS Available Package Price**
    DS2148  T1/E1/J1
    •LIU
    		 1 Yes 5 Yes Yes CSBGA/49
    TQFP/44     		$7.50 @ 1k
    DS21Q48  4  -  See Data Sheet BGA/144 $45.47 @ 1k
    See All T/E Carrier & Packetized Products (96)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    Application Notes
  		• Application Note 324: T1/E1 Network Interface Design - DS2148, DS2148, DS21Q48
  		• Application Note 351: T1/E1 and T3/E3 Transformer Selection Guide - DS2148, DS21Q48
  		• Application Note 370: Using RCLK in a BITS/SSU Application - DS2148
  		• Application Note 382: J1 Japanese Standards - DS2148, DS21Q48
  		• Application Note 387: Using DS2148/348 as Repeater - DS2148
  		• Application Note 388: Hitless Protection Switching with 1+1 Redundancy - DS2148
  		• Application Note 402: Additional Pulse Amplitude Settings for DS2148, DS21348, DS21Q48, DS21Q348 and DS21448 - DS2148, DS21Q48
  		• Application Note 405: Power-Fault Protection Layout - DS2148, DS2148, DS21Q48
  		• Application Note 407: DS2148/DS21348 Hardware Mode - DS2148
  		• Application Note 590: Maxim Telecommunications Frequently Asked Questions - DS2148
  		• Application Note 2706: Bit Error Rate Testing the DS314x Series of DS3/E3 Framers - DS2148
  		• Application Note 3556: Configuring Dallas Semiconductor LIUs Without a Microcontroller - DS2148

    Evaluation Kits
    none

    Design Guides
  		• COMMUNICATIONS (PDF)

    Reliability Reports
  		• Reliability Report: DS2148.pdf DS21Q48.pdf

    Software/Models
  		• DS2148T_33 IBIS Model
  		• DS2148G_5 IBIS Model
  		• DS2148T_5 IBIS Model
  		• DS2148G_33 IBIS Model
  		• DS21Q48_5 IBIS Model
  		• DS21Q48_33 IBIS Model
  		• DS21Q48 Cadence Concept Symbol
  		• DS21Q48 Cadence Allegro Symbol
  		• DS21Q48 Logical Symbol-XML Format

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-23 of 23

    DS2148 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    DS2148G  
    		CSBGA;49 pin;
    Dwg: 56-G6006-001
    Use pkgcode/variation: X49-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS2148GB  
    		CSBGA;49 pin;
    Dwg: 56-G6006-001
    Use pkgcode/variation: X49-1*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS2148G+  
    		CSBGA;49 pin;
    Dwg: 56-G6006-001
    Use pkgcode/variation: X49+1*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS2148GN+  
    		CSBGA;49 pin;
    Dwg: 56-G6006-001
    Use pkgcode/variation: X49+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS2148GN  
    		CSBGA;49 pin;
    Dwg: 56-G6006-001
    Use pkgcode/variation: X49-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS2148GNB  
    		CSBGA;49 pin;
    Dwg: 56-G6006-001
    Use pkgcode/variation: X49-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS2148DK  
    		module


    		0°C to +70°C See data sheet
    DS2148T  
    		TQFP;44 pin;
    Dwg: 56-G4012-001
    Use pkgcode/variation: C44-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS2148TB  
    		TQFP;44 pin;
    Dwg: 56-G4012-001
    Use pkgcode/variation: C44-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS2148T+  
    		TQFP;44 pin;
    Dwg: 56-G4012-001
    Use pkgcode/variation: C44+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS2148TC1  
    		TQFP;44 pin;
    Dwg: 56-G4012-001
    Use pkgcode/variation: C44-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS2148TA2  
    		TQFP;44 pin;
    Dwg: 56-G4012-001
    Use pkgcode/variation: C44-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS2148TNB  
    		TQFP;44 pin;
    Dwg: 56-G4012-001
    Use pkgcode/variation: C44-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS2148TN-W  
    		TQFP;44 pin;
    Dwg: 56-G4012-001
    Use pkgcode/variation: C44-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS2148TN+  
    		TQFP;44 pin;
    Dwg: 56-G4012-001
    Use pkgcode/variation: C44+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS2148TNC  
    		TQFP;44 pin;
    Dwg: 56-G4012-001
    Use pkgcode/variation: C44-2*
    		-40°C to +85°C See data sheet
    Materials Analysis
    DS2148TN  
    		TQFP;44 pin;
    Dwg: 56-G4012-001
    Use pkgcode/variation: C44-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS21Q48 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    DS21Q48C  
    		BGA;144 pin;
    Dwg: 56-G6011-002
    Use pkgcode/variation: V144-M6*
    		0°C to +70°C See data sheet
    DS21Q48B  
    		BGA;144 pin;
    Dwg: 56-G6011-002
    Use pkgcode/variation: V144-M6*
    		0°C to +70°C See data sheet
    DS21Q48  
    		BGA;144 pin;
    Dwg: 56-G6011-002
    Use pkgcode/variation: V144-M6*
    		0°C to +70°C See data sheet
    DS21Q48A3N  
    		BGA;144 pin;
    Dwg: 56-G6011-002
    Use pkgcode/variation: V144-M6*
    		-40°C to +85°C See data sheet
    DS21Q48NB  
    		BGA;144 pin;
    Dwg: 56-G6011-002
    Use pkgcode/variation: V144-M6*
    		-40°C to +85°C See data sheet
    DS21Q48N  
    		BGA;144 pin;
    Dwg: 56-G6011-002
    Use pkgcode/variation: V144-M6*
    		-40°C to +85°C See data sheet

    More Information
  		• New Product Press Release 2001-05-15 
  		• Software Drivers and Advanced Applications
  		• Design Kit: DS2148DK.zip

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    2006-01-23
    This page last modified: 2007-06-21




             


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