数据手册：DS2148, DS21Q48 .pdf [英文Rev.4(PDF,1.1MB)]
{该产品不推荐用于新的设计，有些型号不再供货或将要停产并进入最后一次采购阶段，在此之后将不接受新的订单。详细信息请参考定购信息。}The DS2148 is a complete selectable E1 or T1 Line Interface Unit (LIU) for short- and long-haul applications. Throughout the data sheet, J1 is represented wherever T1 exists. Receive sensitivity adjusts automatically to the incoming signal and can be programmed for 0dB to 12dB or 0dB to 43dB for E1 applications and 0dB to 30dB or 0dB to 36dB for T1 applications. The device can generate the necessary G.703 E1 waveshapes in 75Ω or 120Ω applications and DSX-1 line build outs or CSU line build outs of 0dB, -7.5dB, -15dB, and -22.5dB for T1 applications. The crystal-less onboard jitter attenuator requires only a 2.048MHz MCLK for both E1 and T1 applications (with the option of using a 1.544MHz MCLK in T1 applications). The jitter attenuator FIFO is selectable to either 32 bits or 128 bits in depth and can be placed in either the transmit or receive data paths. An X 2.048MHz output clock synthesized to RCLK is available for use as a backplane system clock (where n = 1, 2, 4, or 8). The DS2148 has diagnostic capabilities such as loopbacks and PRBS pattern generation/detection. 16-bit loop-up and loop-down codes can be generated and detected. The device can be controlled via an 8-bit parallel muxed or nonmuxed port, serial port or used in hardware mode. The device fully meets all of the latest E1 and T1 specifications including ANSI T1.403-1999, ANSI T1.408, AT&T TR 62411, ITU G.703, G.704, G.706, G.736, G.775, G.823, I.431, O.151, O.161, ETSI ETS 300 166, JTG.703, JTI.431, JJ-20.1, TBR12, TBR13, and CTR4.
产品关键特性
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芯片订购型号
| 订购型号 | 产品状态 | 封装形式 | 工作温度 | RoHS/无铅 |
| DS2148DK | NRND | DS21348DK | N/A；封装信息 | 0°C至+70°C |
| DS2148G | NRND | DS21348G | CSBGA；49引脚；CSBGA；49引脚封装信息 | 0°C至+70°C |
| DS2148G+ | NRND | DS21348G+ | L-FPBGA-OM-LF；49引脚；CSBGA；49引脚封装信息 | 0°C至+70°C |
| DS2148GN | NRND | DS21348GN | CSBGA；49引脚；CSBGA；49引脚封装信息 | -40°C至+85°C |
| DS2148GN+ | NRND | DS21348GN+ | L-FPBGA-OM-LF；49引脚；CSBGA；49引脚封装信息 | -40°C至+85°C |
| DS2148T | 限制供货 | DS2148T+ | TQFP；44引脚；148.8mm²封装信息 | 0°C至+70°C |
| DS2148T+ | NRND | DS21348T+ | TQFP；44引脚；148.8mm²封装信息 | 0°C至+70°C |
| DS2148TA2 | 停止供货 | TQFP；44引脚；148.8mm²封装信息 | 0°C至+70°C | |
| DS2148TB | 停止供货 | TQFP；44引脚；148.8mm²封装信息 | 0°C至+70°C | |
| DS2148TC1 | 停止供货 | TQFP；44引脚；148.8mm²封装信息 | 0°C至+70°C | |
| DS2148TN | 停止供货 | DS2148TN+ | TQFP；44引脚；148.8mm²封装信息 | -40°C至+85°C |
| DS2148TN+ | NRND | DS21348TN+ | TQFP；44引脚；148.8mm²封装信息 | -40°C至+85°C |
| DS2148TN-W | 停止供货 | TQFP；44引脚；148.8mm²封装信息 | -40°C至+85°C | |
| DS2148TNB | 停止供货 | TQFP；44引脚；148.8mm²封装信息 | -40°C至+85°C | |
| DS2148TNC | 停止供货 | TQFP；44引脚；148.8mm²封装信息 | -40°C至+85°C | |
| DS21Q48 | 停止供货 | BGA；144引脚封装信息 | 0°C至+70°C | |
| DS21Q48N | 停止供货 | BGA；144引脚封装信息 | -40°C至+85°C |
相关芯片型号
| DS21348 | 3.3V、E1/T1/J1线路接口 |
| DS21Q348 | 3.3V、E1/T1/J1线路接口 |
| DS21Q43A | 四路、E1成帧器 |
| DS21Q58 | E1四收发器 |
| DS21FF42 | 4 x 4、16通道、T1成帧器/4 x 3、12通道、T1成帧器 |
| DS21FT42 | 4 x 4、16通道、T1成帧器/4 x 3、12通道、T1成帧器 |
| DS21Q59 | E1四收发器 |
| DS21Q352 | 四路T1/E1收发器(3.3V, 5.0V) |
| DS21Q354 | 四路T1/E1收发器(3.3V, 5.0V) |
| DS21Q552 | 四路T1/E1收发器(3.3V, 5.0V) |
| DS21FF44 | 4x3、12通道、E1成帧器/4x4、16通道、E1成帧器 |
| DS21FT44 | 4x3、12通道、E1成帧器/4x4、16通道、E1成帧器 |
