Datasheet > DS21Q55

DS21Q55

更新时间： 2024-10-27 22:10:15

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描述
Quad T1/E1/J1 Transceiver

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DS21Q55 数据手册

DS21Q55

Quad T1/E1/J1 Transceiver

www.maxim-ic.com

GENERAL DESCRIPTION

FEATURES

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.

CꢀComplete T1/DS1/ISDN-PRI/J1 Transceiver

Functionality

CꢀComplete E1 (CEPT) PCM-30/ISDN-PRI

Transceiver Functionality

CꢀLong-Haul and Short-Haul Line Interface for

Clock/Data Recovery and Waveshaping

CꢀCMI Coder/Decoder for Optical I/F

CꢀCrystal-Less Jitter Attenuator

Each LIU is composed of transmit and receive

interfaces and a jitter attenuator. The transmit

interface is responsible for generating the necessary

waveshapes for driving the network and providing

the correct source impedance depending on the type

of media used. T1 waveform generation includes

DSX-1 line build-outs as well as CSU line build-outs

of -7.5dB, -15dB, and -22.5dB. E1 waveform

generation includes G.703 waveshapes for both 75ꢀ

coax and 120ꢀ twisted cables. The receive interface

provides network termination and recovers clock and

data from the network.

CꢀFully Independent Transmit and Receive

Functionality

CꢀDual HDLC Controllers

CꢀProgrammable BERT Generator and Detector

CꢀInternal Software-Selectable Receive and

Transmit-Side Termination Resistors for

75ꢀ/100ꢀ/120ꢀ T1 and E1 Interfaces

CꢀDual Two-Frame Elastic-Store Slip Buffers that

Connect to Asynchronous Backplanes Up to

16.384MHz

Cꢀ16.384MHz, 8.192MHz, 4.096MHz, or

2.048MHz Clock Output Synthesized to

Recovered Network Clock

APPLICATIONS

Routers

Channel Service Units (CSUs)

Data Service Units (DSUs)

Muxes

ORDERING INFORMATION

PART

TEMP RANGE

PIN-PACKAGE

Switches

256 BGA

DS21Q55

0°C to +70°C

Channel Banks

(27mm x 27mm)

T1/E1 Test Equipment

DSL Add/Drop Multiplexers

256 BGA

DS21Q55N

-40°C to +85°C

(27mm x 27mm)

Pin Configurations appear in Section 2.8.

Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device

may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata.

1 of 237

REV: 042204

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与DS21Q55相关器件

型号	品牌	获取价格	描述	数据表
DS21Q552	DALLAS	获取价格	Quad T1/E1 Transceiver 5V
DS21Q554	DALLAS	获取价格	Quad T1/E1 Transceiver 5V
DS21Q554	ROCHESTER	获取价格	DATACOM, PCM TRANSCEIVER, PBGA256, 27 X 27 MM, MCMBGA-256
DS21Q55DK	ETC	获取价格	Quad T1/E1/J1 Transceiver Design Kit Daughter Card
DS21Q55N	ETC	获取价格	Quad T1/E1/J1 Transceiver
DS21Q58	DALLAS	获取价格	E1 Quad Transceiver
DS21Q58	MAXIM	获取价格	Dallas Semiconductor
DS21Q58L	DALLAS	获取价格	E1 Quad Transceiver
DS21Q58L+	MAXIM	获取价格	Framer, CMOS, PQFP100, LQFP-100
DS21Q58LN	DALLAS	获取价格	E1 Quad Transceiver

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