Datasheet > DS21Q42

DS21Q42

更新时间： 2024-10-27 22:10:55

品牌	Logo	应用领域
达拉斯 - DALLAS		/
页数	文件大小	规格书
119页	1304K
描述
Enhanced QUAD T1 FRAMER

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中文翻译

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数据手册

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DS21Q42 数据手册

DS21Q42

Enhanced QUAD T1 FRAMER

www.dalsemi.com

FEATURES

FUNCTIONAL DIAGRAM

ꢀ Four T1 DS1/ISDN–PRI/J1 framing

transceivers

Elastic

Store

Receive

Framer

ꢀ All four framers are fully independent

ꢀ Each of the four framers contain dual two–

Elastic

Store

Transmit

Formatter

ꢀ frame elastic store slip buffers that can connect

to asynchronous backplanes up to 8.192 MHz

FRAMER #0

FRAMER #1

FRAMER #2

FRAMER #3

ꢀ 8–bit parallel control port that can be used

directly on either multiplexed or non–

multiplexed buses (Intel or Motorola)

Control Port

ꢀ Programmable output clocks for Fractional T1

ꢀ Fully independent transmit and receive

functionality

ꢀ Integral HDLC controller with 64-byte buffers

ACTUAL SIZE

configurable for FDL or DS0 operation

ꢀ Generates and detects in–band loop codes from

1 to 8 bits in length including CSU loop codes

QUAD

FRAMER

ꢀ Pin compatible with DS21Q44 E1 Enhanced

Quad E1 Framer

ꢀ 3.3V supply with 5V tolerant I/O; low power

CMOS

ORDERING INFORMATION

DS21Q42T (0⁰C to 70⁰C)

ꢀ Available in 128–pin TQFP package

ꢀ IEEE 1149.1 support

DS21Q42TN (-40⁰C to +85⁰C)

DESCRIPTION

The DS21Q42 is an enhanced version of the DS21Q41B Quad T1 Framer. The DS21Q42 contains four

framers that are configured and read through a common microprocessor compatible parallel port. Each

framer consists of a receive framer, receive elastic store, transmit formatter and transmit elastic store. All

four framers in the DS21Q42 are totally independent, they do not share a common framing synchronizer.

Also the transmit and receive sides of each framer are totally independent. The dual two-frame elastic

stores contained in each of the four framers can be independently enabled and disabled as required. The

device fully meets all of the latest T1 specifications including ANSI T1.403–1995, ANSI T1.231–1993,

AT&T TR 62411 (12–90), AT&T TR54016, and ITU G.704 and G.706.

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与DS21Q42相关器件

型号	品牌	获取价格	描述	数据表
DS21Q42T	DALLAS	获取价格	Enhanced QUAD T1 FRAMER
DS21Q42TN	DALLAS	获取价格	Enhanced QUAD T1 FRAMER
DS21Q43A	DALLAS	获取价格	Quad E1 Framer
DS21Q43A	MAXIM	获取价格	Framer, CMOS, PQFP128,
DS21Q43AT	DALLAS	获取价格	Quad E1 Framer
DS21Q43ATN	DALLAS	获取价格	Quad E1 Framer
DS21Q44	DALLAS	获取价格	Enhanced QUAD E1 FRAMER
DS21Q44T	DALLAS	获取价格	Enhanced QUAD E1 FRAMER
DS21Q44T	MAXIM	获取价格	Framer, CMOS, PQFP128, TQFP-128
DS21Q44T+	MAXIM	获取价格	Framer, CMOS, PQFP128, TQFP-128