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LXT351QE 参数 Datasheet PDF下载

LXT351QE图片预览
型号: LXT351QE
PDF下载: 下载PDF文件 查看货源
内容描述: PCM收发器|单| CEPT PCM - 30 / E - 1 | CMOS | QFP | 44PIN |塑料\n [PCM TRANSCEIVER|SINGLE|CEPT PCM-30/E-1|CMOS|QFP|44PIN|PLASTIC ]
分类和应用: 电信集成电路PC
文件页数/大小: 46 页 / 1070 K
品牌: INTEL [ INTEL ]
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T1/E1 Short Haul Transceiver with Crystal-less Jitter Attenuation LXT351  
4.0  
Application Information  
4.1  
Transmit Return Loss  
Table 15 shows the specification for transmit return loss in E1 applications. The G.703/CH PTT  
specification is a Swiss Telecommunications Ministry specification.  
Table 16 and Table 17 show the transmit return loss values for E1 and T1 applications.  
4.2  
Transformer Data  
Specifications for transformers are listed in Table 18. A list of transformers recommended for use  
with the LXT351 are specified in Table 19.  
4.3  
4.4  
Application Circuit  
Figure 11 shows a typical LXT351 application.  
Line Protection  
On the receive side, 1 kseries resistors protect the receiver against current surges coupled into  
the device. Due to the high receiver impedance (40 ktypical) the resistors do not affect the  
receiver sensitivity. On the transmit side, Schottky diodes D1-D4 protect the output driver. While  
not mandatory for normal operation, these protection elements are strongly recommended to  
improve the design robustness  
Table 15. E1 Transmit Return Loss Requirements  
Return Loss  
Frequency Band  
ETS 300 166  
G.703/CH PTT  
51-102 kHz  
102-2048 kHz  
2048 - 3072 kHz  
6 dB  
8 dB  
8 dB  
8 dB  
14 dB  
10 dB  
Datasheet  
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