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參數(shù)資料
| 型號(hào)： | XRT83L38IB-F |
| 廠商： | Exar Corporation |
| 文件頁(yè)數(shù)： | 31/87頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC LIU T1/E1/J1 OCTAL 225BGA |
| 標(biāo)準(zhǔn)包裝： | 84 |
| 類型： | 線路接口裝置（LIU） |
| 驅(qū)動(dòng)器/接收器數(shù)： | 8/8 |
| 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： | 225-BGA |
| 供應(yīng)商設(shè)備封裝： | 225-BGA（19x19） |
| 包裝： | 托盤 |
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XRT83L38
34
REV. 1.0.2
OCTAL T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
TRANSMITTER (CHANNELS 0 - 7)
TRANSMIT TERMINATION MODE
In Hardware mode, TXTSEL (Pin 84) can be tied “High” to select internal termination mode for all transmit
channels or tied “Low” for external termination. Individual channel control can be done only in Host mode. In
Host mode, bit 6 in the appropriate register for a given channel is set “High” to select the internal termination
mode for that specific transmit channel, see Table 20, “Microprocessor Register #1, Bit Description,” on
In internal mode, no external resistors are used. An external capacitor of 0.68
μF is used for proper operation of
the internal termination circuitry, see Figure 13.
EXTERNAL TRANSMIT TERMINATION MODE
By default the XRT83L38 is set for external termination mode at power up or at Hardware reset.
When external transmit termination mode is selected, the internal termination circuitry is disabled. The value of
the external resistors is chosen for a specific application according to the turns ratio selected by TRATIO (Pin
127) in Hardware mode or bit 0 in the appropriate register for a specific channel in Host mode, see Table 10
and Table 22, “Microprocessor Register #3, Bit Description,” on page 55. Figure 14 is a simplified block
diagram for T1 (100
Ω) in the external termination mode. Figure 15 is a simplified block diagram for E1 (75Ω) in
the external termination mode.
FIGURE 15. SIMPLIFIED DIAGRAM FOR E1 IN EXTERNAL TERMINATION MODE (RXTSEL= 0)
TABLE 8: TRANSMIT TERMINATION CONTROL
TXTSEL
TX TERMINATION
TX TRANSFORMER RATIO
0
EXTERNAL
1:2.45
1
INTERNAL
1:2
TABLE 9: TERMINATION SELECT CONTROL
TERSEL1
TERSEL0
TERMINATION
0
100
Ω
0
1
110
Ω
1
0
75
Ω
1
120
Ω
9.1
Ω
9.1
Ω
TTIP
TR IN G
RT IP
RRING
75
Ω
XRT83L38 LIU
75
Ω
75
Ω
1:2.45
1:1
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| XRT86L30IV-F | IC LIU/FRAMER TI/E1/J1 SGL 128LQ |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XRT83L38IV | 制造商:EXAR 制造商全稱:EXAR 功能描述:OCTAL T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR |
| XRT83SH314 | 制造商:EXAR 制造商全稱:EXAR 功能描述:14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT |
| XRT83SH314_0610 | 制造商:EXAR 制造商全稱:EXAR 功能描述:14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT |
| XRT83SH314ES | 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI 14 CHT1/E1LIU SH RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| XRT83SH314IB | 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
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