收藏本站
参数资料
型号： DS21Q44T+
厂商： Maxim Integrated Products
文件页数： 39/105页
文件大小： 0K
描述： IC FRAMER ENHANCED E1 4X 128TQFP
标准包装： 72
控制器类型： E1 调帧器
接口： 并行/串行
电源电压： 2.97 V ~ 3.63 V
电流 - 电源： 75mA
工作温度： 0°C ~ 70°C
安装类型： 表面贴装
封装/外壳： 128-LQFP
供应商设备封装： 128-LQFP（14x20）
包装： 管件
DS21Q44
39 of 105
Table 7-1. ALARM CRITERIA
ALARM
SET CRITERIA
CLEAR CRITERIA
ITU SPEC.
RSA1
(receive signaling all 1’s)
Over 16 consecutive frames
(one full MF) timeslot 16
contains less than three 0’s
Over 16 consecutive frames
(one full MF) timeslot 16
contains three or more 0’s
G.732
4.2
RSA0
(receive signaling all 0’s)
Over 16 consecutive frames
(one full MF) timeslot 16
contains all 0’s
Over 16 consecutive frames
(one full MF) timeslot 16
contains at least a single 1
G.732
5.2
RDMA
(receive distant multiframe
alarm)
Bit 6 in timeslot 16 of frame
0 set to 1 for two
consecutive MF
Bit 6 in timeslot 16 of frame
0 set to 0 for two
consecutive MF
O.162
2.1.5
RUA1
(receive unframed all 1’s)
Less than three 0’s in two
frames (512 bits)
More than two 0’s in two
frames (512 bits)
O.162
1.6.1.2
RRA
(receive remote alarm)
Bit 3 of nonalign frame set
to one for three consecutive
occasions
Bit 3 of nonalign frame set
to 0 for three consecutive
occasions
O.162
2.1.4
RCL
(receive carrier loss)
255 (or 2048) consecutive
0’s received
In 255 bit times, at least 32
1’s are received
G.775/
G.962
SR2: STATUS REGISTER 2 (Address=07 Hex)
(MSB)
(LSB)
RMF
RAF
TMF
SEC
TAF
LOTC
RCMF
TSLIP
SYMBOL
POSITION
NAME AND DESCRIPTION
RMF
SR2.7
Receive CAS Multiframe. Set every 2 ms (regardless if CAS
signaling is enabled or not) on receive multiframe boundaries.
Used to alert the host that signaling data is available.
RAF
SR2.6
Receive Align Frame. Set every 250 s at the beginning of
align frames. Used to alert the host that Si and Sa bits are
available in the RAF and RNAF registers.
TMF
SR2.5
Transmit Multiframe. Set every 2 ms (regardless if CRC4 is
enabled) on transmit multiframe boundaries. Used to alert the
host that signaling data needs to be updated.
SEC
SR2.4
One Second Timer. Set on increments of one second based on
RCLK. If CCR2.7=1, then this bit will be set every 62.5 ms
instead of once a second.
TAF
SR2.3
Transmit Align Frame. Set every 250 s at the beginning of
align frames. Used to alert the host that the TAF and TNAF
registers need to be updated.
LOTC
SR2.2
Loss of Transmit Clock. Set when the TCLK pin has not
transitioned for one channel time (or 3.9 s). Will force the
LOTC pin high if enabled via TCR2.0.
相关PDF资料
PDF描述
DS21Q50LN IC TRANSCEIVER E1 QD IND 100LQFP
DS21Q55 IC TXRX QUAD T1/E1/J1 SCT 256BGA
DS21Q59LN+ IC TXRX E1 QUAD 100-LQFP
DS21S07AS+T&R IC TERMINATOR SCSI 16-SOIC
DS21T05Z/T&R IC TERMINATOR SCSI 150MIL 16SOIC
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

*
*
*