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參數(shù)資料
| 型號： | XRT83L34IV |
| 廠商： | EXAR CORP |
| 元件分類： | 數(shù)字傳輸電路 |
| 英文描述： | QUAD T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR |
| 中文描述： | DATACOM, PCM TRANSCEIVER, PQFP128 |
| 封裝： | 14 X 20 MM, 1.40 MM HEIGHT, TQFP-128 |
| 文件頁數(shù)： | 34/82頁 |
| 文件大?。?/td> | 447K |
| 代理商： | XRT83L34IV |
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XRT83L34
QUAD T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
PRELIMINARY
REV. P1.3.4
31
TRANSMITTER (CHANNELS 0 - 3)
T
RANSMIT
T
ERMINATION
M
ODE
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
page 47
.
For internal termination, the transformer turns ratio is always 1:2. In internal mode, no external resistors are
used. An external capacitor of 0.68
μ
F is used for proper operation of the internal termination circuitry, see
Figure 13
.
E
XTERNAL
T
RANSMIT
T
ERMINATION
M
ODE
By default the XRT83L34 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 51
.
Figure 14
is a simplified block
F
IGURE
15. S
IMPLIFIED
D
IAGRAM
FOR
E1
IN
E
XTERNAL
T
ERMINATION
M
ODE
(RXTSEL= 0)
T
ABLE
8: T
RANSMIT
T
ERMINATION
C
ONTROL
TXTSEL
TX TERMINATION
T
X
T
RANSFORMER
R
ATIO
0
EXTERNAL
1:2.45
1
INTERNAL
1:2
T
ABLE
9: T
ERMINATION
S
ELECT
C
ONTROL
TERSEL1
TERSEL0
TERMINATION
0
0
100
0
1
110
1
0
75
1
1
120
9.1
9.1
TTIP
TR IN G
R TIP
R R IN G
75
XR T83L34 LIU
75
75
1:2.45
1:1
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| XRT83SH38 | 8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XRT83L34IV-F | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| XRT83L34IVTR | 功能描述:外圍驅(qū)動器與原件 - 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 |
| XRT83L34IVTR-F | 功能描述:外圍驅(qū)動器與原件 - 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 |
| XRT83L38 | 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 |
| XRT83L38_07 | 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 |
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