DS21Q55, DS21Q55N Quad T1/E1/J1 Transceiver

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Description

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The DS21Q55 is a quad software-selectable T1, E1, or J1 MCM device for short-haul and long-haul applications. Each port is composed of a line interface unit (LIU), framer, HDLC controllers, and a TDM backplane interface, and is controlled by an 8-bit parallel port configured for Intel or Motorola bus operations. The DS21Q55 is software compatible with the DS2155 single-chip transceiver. It is pin compatible with the DS21Qx5y family of products.

Key Features Applications/Uses

Complete T1/DS1/ISDN-PRI/J1 Transceiver Functionality
Complete E1 (CEPT) PCM-30/ISDN-PRI Transceiver Functionality
Long-Haul and Short-Haul Line Interface for Clock/Data Recovery and Waveshaping
CMI Coder/Decoder for Optical I/F
Crystal-Less Jitter Attenuator
Fully Independent Transmit and Receive Functionality
Dual HDLC Controllers
Programmable BERT Generator and Detector
Internal Software-Selectable Receive and Transmit-Side Termination Resistors for 75Ω /100Ω /120Ω T1 and E1 Interfaces
Dual Two-Frame Elastic-Store Slip Buffers that Connect to Asynchronous Backplanes Up to 16.384MHz
16.384MHz, 8.192MHz, 4.096MHz, or 2.048MHz Clock Output Synthesized to Recovered Network Clock

Channel Banks
Channel Service Units (CSUs)
Data Service Units (DSUs)
DSL Add/Drop Multiplexers
Muxes
Routers/Switches
Routers/Switches
T1/E1 Test Equipment

Key Specifications: T/E Carrier & Packetized Products

Part Number

Transmission Standard

Functions

Number of Channels

5V-Tolerant I/O

Supply Voltage (V)

EV-Kit

Package

Smallest Available Package (max w/pins) (mm²)

Price^**

DS21Q55

T1/E1/J1

•	Single Chip Transceiver

Yes

3.3

Yes

BGA/256

289

$69.00 @ 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.

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Document Ref.: xxxx; 2004-04-23
This page last modified: 2007-06-29