3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit

3.3V E1/T1/J1 Short-/Long-Haul 16-Port Line Interface Unit Provides 16 Independent Receivers and Transmitters in a Single BGA Package
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Active: In Production.


The DS26334 is a 16-channel short/long-haul line interface unit (LIU) that supports E1/T1/J1 from a single 3.3V power supply. A single bill of material can support E1/T1/J1 that requires no external termination. Redundancy is supported through nonintrusive monitoring, optimal high-impedance modes and configurable 1:1 or 1+1 backup enhancements. An on-chip synthesizer generates the E1/T1/J1 clock rates by a single master clock input of various frequencies. Two clock output references are also offered. The device is offered in a 256-pin TE-CSBGA, the smallest package available for a 16-channel LIU.

Data Sheet

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Errata DS26334 26334A1.pdf
Errata DS26334 26334A2.pdf
Errata DS26334 26334A3.pdf

Key Features

  • 16 E1, T1, or J1 Short/Long-Haul Line Interface Units
  • Independent E1, T1 or J1 Selections
  • Fully Internal Impedance Match Requires No External Resistors
  • Software-Selectable Transmit and Receive-Side Impedance Match
  • Crystal-Less Jitter Attenuator
  • Selectable Single-Rail and Dual-Rail Mode and AMI or HDB3/B8ZS Line Encoding and Decoding
  • Detection and Generation of AIS
  • Digital/Analog Loss of Signal Detection as per T1.231, G.775 and ETS 300 233
  • External Master Clock Can Be Multiple of 2.048MHz or 1.544MHz for T1/J1 or E1 Operation; This Clock Will Be Internally Adapted for T1 or E1 Usage
  • Receiver Signal Level Indicator from -2.5dB to -38dB in T1 Mode and -3dB to -43dB in E1 Mode in 2.5dB Increments
  • Two Built-In BERT Testers for Diagnostics
  • 8-Bit Parallel Interface Support for Intel or Motorola Mode or a 4-Wire Serial Interface
  • Transmit Short-Circuit Protection
  • G.772 Nonintrusive Monitoring
  • Receive Monitor Mode Handles Combinations of 14dB to 30dB of Resistive Attenuation Along with 12dB to 30dB of Cable Attenuation
  • Specification Compliance to the Latest T1 and E1 Standards—ANSI T1.102, AT&T Pub 62411, T1.231, T1.403, ITU-T G.703, G.742, G.775, G.823, ETS 300 166, and ETS 300 233
  • Single 3.3V Supply with 5V Tolerant I/O
  • JTAG Boundary Scan as Per IEEE 1149.1


  • ATM and Frame Relay Equipment
  • E1/T1/J1 LAN/WAN Routers
  • E1/T1/J1 Multiplexer and Channel Banks
  • ISDN Primary Rate Interface
  • T1 Digital Cross-Connects
  • Wireless Base Stations

Key Specifications:

T/E Carrier & Packetized Products
Part Number Transmission Standard Functions Channels VSUPPLY
See Notes
DS26334 NEW! T1/E1/J1 LIU 16 3.3 $49.44 @1k
See All T/E Carrier & Packetized Products (88)

Pricing 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 and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


DS26334: Functional Diagram
Functional Diagram

More Information

Design Kit: DS26334DK

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Information Index

Document Ref.: 19-5753 Rev 4; 2011-03-21
This page last modified: 2011-03-21