收藏本站
参数资料
型号： DS21Q44T
厂商： MAXIM INTEGRATED PRODUCTS INC
元件分类： Digital Transmission Controller
英文描述： DATACOM, FRAMER, PQFP128
封装： TQFP-128
文件页数： 1/105页
文件大小： 702K
代理商： DS21Q44T
1 of 105
062602
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.
FEATURES
§ Four E1 (CEPT or PCM-30)/ISDN-PRI
framing transceivers
§ All four framers are fully independent;
transmit and receive sections of each framer
are fully independent
§ Frames to FAS, CAS, CCS, and CRC4 formats
§ Each of the four framers contain dual two-
frame elastic store slip buffers that can
connect to asynchronous backplanes up to
8.192MHz
§ 8-bit parallel control port that can be used
directly on either multiplexed or
nonmultiplexed buses (Intel or Motorola)
§ Easy access to Si and Sa bits
§ Extracts and inserts CAS signaling
§ Large counters for bipolar and code
violations, CRC4 code word errors, FAS
word errors, and E-bits
§ Programmable output clocks for Fractional
E1, per channel loopback, H0 and H12
applications
§ Integral HDLC controller with 64-byte buffers
configurable for Sa bits or DS0 operation
§ Detects and generates AIS, remote alarm,
and remote multiframe alarms
§ Pin compatible with DS21Q42 enhanced
quad T1 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
ACTUAL SIZE
QUAD
E1
FRAMER
ORDERING INFORMATION
DS21Q44T
0°C to +70°C
DS21Q44TN
-40°C to +85°C
DESCRIPTION
The DS21Q44 E1 is an enhanced version of the DS21Q43 quad E1 framer. The DS21Q44 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 DS21Q44 are totally independent; they do not share a common framing synchronizer.
The transmit and receive sides of each framer are also totally independent. The dual two-frame elastic
stores contained in each of the four framers can be independently enabled and disabled as required. The
www.maxim-ic.com
DS21Q44
Enhanced Quad E1 Framer
相关PDF资料
PDF描述
DS21Q44TN DATACOM, FRAMER, PQFP128
DS21Q48N DATACOM, PCM TRANSCEIVER, PBGA144
DS21Q48 DATACOM, PCM TRANSCEIVER, PBGA144
DS21Q552 DATACOM, PCM TRANSCEIVER, PBGA256
DS2250-32-16 8-BIT, 16 MHz, MICROCONTROLLER, SMA40
相关代理商/技术参数
参数描述
DS21Q44T+ 功能描述:网络控制器与处理器 IC Enhanced Quad 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
DS21Q44TN 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
DS21Q48 功能描述:网络控制器与处理器 IC 5V Quad E1/T1/J1 Line Interface 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
DS21Q48A3N 功能描述:网络控制器与处理器 IC 5V Quad E1/T1/J1 Line Interface 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
DS21Q48B 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
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*