参数资料
型号: XRT83L30IV-F
厂商: Exar Corporation
文件页数: 24/78页
文件大小: 0K
描述: IC LIU LH/SH T1/E1 SGL 64TQFP
标准包装: 160
类型: 线路接口装置(LIU)
驱动器/接收器数: 1/1
规程: T1,E1
电源电压: 3.135 V ~ 3.465 V
安装类型: 表面贴装
封装/外壳: 64-LQFP
供应商设备封装: 64-TQFP(10x10)
包装: 托盘
其它名称: 1016-1633
XRT83L30IV-F-ND
XRT83L30
27
SINGLE-CHANNEL T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
REV. 1.0.1
TRANSMIT AND RECEIVE TERMINATIONS
The XRT83L30 is a versatile LIU that can be programmed to use one Bill of Materials (BOM) for worldwide
applications for T1, J1 and E1. For specific applications the internal terminations can be disabled to allow the
use of existing components and/or designs.
RECEIVER
INTERNAL RECEIVE TERMINATION MODE
In Hardware mode, RXTSEL (Pin 44) can be tied “High” to select internal termination mode or tied “Low” to
select external termination mode. By default the XRT83L30 is set for external termination mode at power up or
at Hardware reset.
In Host mode, bit 7 in the appropriate register, (Table 20, “Microprocessor Register #1, Bit Description,”
on page 47), is set “High” to select the internal termination mode for the receive channel.
If the internal termination mode (RXTSEL = “1”) is selected, the effective impedance for E1, T1 or J1 can be
achieved either with an internal resistor or a combination of internal and external resistors as shown in Table 7.
TABLE 6: RECEIVE TERMINATION CONTROL
RXTSEL
RX TERMINATION
0
EXTERNAL
1
INTERNAL
FIGURE 13. SIMPLIFIED DIAGRAM FOR THE INTERNAL RECEIVE AND TRANSMIT TERMINATION MODE
T1
TTIP
TRING
5
8
1:2
75
, 100
110
or 120
4
1
0.68
F
R
int
R
int
TTIP
TRING
TX
Line Driver
T2
RTIP
RRING
1
4
1:1
8
5
RTIP
RRING
RX
Equalizer
R
int
TPOS
TNEG
TCLK
RPOS
RNEG
RCLK
75
, 100
110
or 120
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