XRT83SL216IB (Exar) PDF资料下载 Datasheet(17/42 页)

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参数资料

型号：	XRT83SL216IB
厂商：	Exar Corporation
文件页数：	17/42页
文件大小：	0K
描述：	IC LIU SH E1 16CH 289STBGA
标准包装：	84
类型：	线路接口装置（LIU）
驱动器/接收器数：	16/16
规程：	T1，E1，J1
电源电压：	3.135 V ~ 3.465 V
安装类型：	表面贴装
封装/外壳：	289-LFBGA
供应商设备封装：	289-STBGA（15x15）
包装：	托盘

XRT83SL216

16-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT

REV. 1.0.0

3.0

APPLICATIONS

This applications section describes system considerations along with references to application notes available

for reference where applicable.

3.1

Loopback Diagnostics

The XRT83SL216 supports several loopback modes for diagnostic testing. The following section describes the

local analog loopback, remote loopback, and digital loopback.

3.1.1

Local Analog Loopback

With local analog loopback activated, the transmit output data at TTIP/TRING is internally looped back to the

analog inputs at RTIP/RRING. External inputs at RTIP/RRING are ignored while valid transmit output data

continues to be sent to the line. A simplified block diagram of local analog loopback is shown in Figure 15.

FIGURE 15. SIMPLIFIED BLOCK DIAGRAM OF LOCAL ANALOG LOOPBACK

NOTE: TAOS takes priority over the transmit input data at TPOS/TNEG.

3.1.2

Remote Loopback

With remote loopback activated, the receive input data at RTIP/RRING is internally looped back to the transmit

output data at TTIP/TRING. The transmit input data at TCLK/TPOS/TNEG are ignored while valid receive

output data continues to be sent to the system. A simplified block diagram of remote loopback is shown in

Figure 16.

FIGURE 16. SIMPLIFIED BLOCK DIAGRAM OF REMOTE LOOPBACK

NOTE: Remote Loop Back takes priority over TAOS.

Encoder

Decoder

Timing

Control

Data and

Clock

Recovery

TAOS

TTIP

TRING

RTIP

RRING

TCLK

TPOS

TNEG

RCLK

RPOS

RNEG