參數(shù)資料
型號(hào): XRT83SL30IV-F
廠商: Exar Corporation
文件頁(yè)數(shù): 21/76頁(yè)
文件大?。?/td> 0K
描述: IC LIU T1/E1/J1 SGL 64TQFP
標(biāo)準(zhǔn)包裝: 160
類型: 線路接口裝置(LIU)
驅(qū)動(dòng)器/接收器數(shù): 1/1
規(guī)程: T1,E1,J1
電源電壓: 3.135 V ~ 3.465 V
安裝類型: 表面貼裝
封裝/外殼: 64-LQFP
供應(yīng)商設(shè)備封裝: 64-TQFP(10x10)
包裝: 托盤
XRT83SL30
25
SINGLE-CHANNEL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
REV. 1.0.1
TRANSMIT AND RECEIVE TERMINATIONS
The XRT83SL30 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 XRT83SL30 is set for external termination mode at power up
or at Hardware reset.
In Host mode, bit 7 in the appropriate register, (Table 19, “Microprocessor Register #1 bit description,” on
page 45), 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 11. 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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