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参数资料
型号： DS21FF42
厂商： DALLAS SEMICONDUCTOR
元件分类： Digital Transmission Controller
英文描述： DATACOM, FRAMER, PBGA300
封装： 27 X 27 MM, BGA-300
文件页数： 24/115页
文件大小： 534K
代理商： DS21FF42
DS21FF42/DS21FT42
16 of 115
5. DS21Q42 FEATURES
Four T1 DS1/ISDN–PRI/J1 framing
transceivers
All four framers are fully independent
Each of the four framers contain dual two–
frame elastic store slip buffers that can connect
to asynchronous backplanes up to 8.192 MHz
8–bit parallel control port that can be used
directly on either multiplexed or non–
multiplexed buses (Intel or Motorola)
Programmable output clocks for Fractional T1
Fully independent transmit and receive
functionality
Integral HDLC controller with 64-byte buffers.
Configurable for FDL or DS0 operation
Generates and detects in–band loop codes
from 1 to 8 bits in length including CSU loop
codes
Pin compatible with DS21Q44 E1 Enhanced
Quad E1 Framer
3.3V supply with 5V tolerant I/O; low power
CMOS
Available in 128–pin TQFP package
IEEE 1149.1 support
FUNCTIONAL DIAGRAM
Receive
Framer
Elastic
Store
Transmit
Formatter
Elastic
Store
FRAMER #0
FRAMER #1
FRAMER #2
FRAMER #3
Control Port
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.
6. DS21Q42 INTRODUCTION
The DS21Q42 is a superset version of the popular DS21Q41 Quad T1 framer offering the new features
listed below. All of the original features of the DS21Q41 have been retained and software created for the
original device is transferable to the DS21Q42.
相关PDF资料
PDF描述
DS21FF42N DATACOM, FRAMER, PBGA300
DS21FT44N DATACOM, FRAMER, PBGA300
DS21FT44 DATACOM, FRAMER, PBGA300
DS21Q352 DATACOM, PCM TRANSCEIVER, PBGA256
DS21Q354 DATACOM, PCM TRANSCEIVER, PBGA256
相关代理商/技术参数
参数描述
DS21FF42+ 功能描述:网络控制器与处理器 IC 4x4 16/4x3 12 Chnl T1/T1 Framer RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray
DS21FF42N 功能描述:网络控制器与处理器 IC RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray
DS21FF42N+ 功能描述:网络控制器与处理器 IC 4x4 16/4x3 12 Chnl T1/T1 Framer RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray
DS21FF44 功能描述:网络控制器与处理器 IC 4x4 16/4x3 12 Chnl E1/E1 Framer RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray
DS21FF44N 功能描述:网络控制器与处理器 IC RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray
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