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參數(shù)資料
| 型號(hào)： | XRT79L74 |
| 廠商： | Exar Corporation |
| 英文描述： | 4 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC |
| 中文描述： | 4 -通道DS3/E3自動(dòng)柜員機(jī)用戶到網(wǎng)絡(luò)接口/ Combo IC對(duì)購買力平價(jià) |
| 文件頁數(shù)： | 43/70頁 |
| 文件大?。?/td> | 547K |
| 代理商： | XRT79L74 |
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PRELIMINARY
XRT79L74
REV. P1.0.0
4 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
41
Y1
E3CLK
I
Clock Recovery PLL E3 Reference Clock Input:
The exact function of this input pin depends upon whether or not the XRT79L74
device has been configured to operate in the SFM (Single-Frequency Mode)
Mode, as described below.If the XRT79L74 device is NOT operating in the Single-
Frequency ModeIf the XRT79L74 device has NOT been configured to operate in
the SFM Mode, then this input pin will function as a Reference Clock signal for the
Clock Recovery PLL and the Jitter Attenuator PLL within the Receive DS3/E33
LIU Block, whenever the XRT79L74 device has been configured to operate in the
E3 Mode.
N
OTE
:
For E3/Non-SFM Modes of operation, the user is expected to supply a
34.368MHz ± 20ppm clock signal to this input pin.
If the XRT79L74 device is operating in the Single-Frequency ModeIf the user has
configured the XRT79L74 device to operate in the SFM Mode, then the user
MUST apply a clock signal with a frequency of 12.288 ± 20ppm to the "DS3CLK/
SFMCLK" input pin (Ball P16). Additionally, the user MUST tie this input pin to
GND.
N
OTE
:
If the user only intends to operate the XRT79L74 device in the DS3/Non-
SFM Mode, then the user should tie this input pin to GND.
AD10
AD14
AD6
AD18
TTIP1
TTIP2
TTIP3
TTIP4
O
O
O
O
Transmit Output - Positive Polarity Signal:
These output pins, along with the TRING output pins, function as the Transmit
DS3/E3 output signal drivers for the XRT79L74.
The user is expected to connect these signals and the TRING output signals to a
1:1 transformer.
Whenever the Transmit Section of the XRT79L74 generates and transmits a posi-
tive-polarity pulse onto the line, these output pins will be pulsed to a "higher-volt-
age" than the TRING output pins.
Conversely, whenever the Transmit Section of the XRT79L74 generates and
transmit a negative-polarity pulse onto the line, these output pins will be pulsed to
a "lower-voltage" than the TRING output pins.
N
OTE
:
These output pins will be tri-stated whenever the user sets the TxONn
input pin (or bit-field) to "0".
AE10
AE14
AE6
AE18
TRING1
TRING2
TRING3
TRING4
O
O
O
O
Transmit Output - Negative Polarity Signal:
These output pins along with the TTIP output pins, function as the Transmit DS3/
E3 output signal drivers for the XRT79L74.
The user is expected to connect these signals and the TTIP output signals to a 1:1
transformer.
Whenever the Transmit Section of the XRT79L74 generates and transmits a pos-
itive-polarity pulse onto the line, these output pins will be pulsed to a "lower-volt-
age" than the TTIP output pins.
Conversely, whenever the Transmit Section of the XRT79L74 generates and
transmit a negative-polarity pulse onto the line, these output pins will be pulsed to
a "higher-voltage" than the TTIP output pins.
N
OTE
:
These output pins will be tri-stated whenever the user sets the TxONn
input pin (or bit-field) to "0".
AE2
Y23
AC3
AA25
TAISEN1
TAISEN2
TAISEN3
TAISEN4
I
I
I
I
Transmit Alarm Indication Signal Enable Input
P
IN
#
N
AME
TYPE
D
ESCRIPTION
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| XRT79L74IB | 4 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC |
| XRT8000ID | Clock Synchronizer/Adapter for Communications |
| XRT8000 | Clock Synchronizer/Adapter for Communications(用于通訊的時(shí)鐘同步設(shè)備/調(diào)整器) |
| XRT8001 | WAN Clock for T1 and E1 Systems |
| XRT8001ID | WAN Clock for T1 and E1 Systems |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XRT79L74IB | 制造商:EXAR 制造商全稱:EXAR 功能描述:4 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC |
| XRT8000 | 制造商:EXAR 制造商全稱:EXAR 功能描述:Clock Synchronizer/Adapter for Communications |
| XRT8000_06 | 制造商:EXAR 制造商全稱:EXAR 功能描述:Clock Synchronizer/Adapter for Communications |
| XRT8000D | 制造商:EXAR 制造商全稱:EXAR 功能描述:CLOCK SYNCHRONIZER/ADAPTER FOR COMMUNICATIONS |
| XRT8000ES | 功能描述:鎖相環(huán) - PLL WAN CLOCK RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray |
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