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(gòu)買力平價(jià)
文件頁(yè)數(shù)： 13/70頁(yè)
文件大?。?/td> 547K
代理商： XRT79L74
PRELIMINARY
XRT79L74
REV. P1.0.0
4 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
11
T3
M26
V5
P24
TxSer1/TxPOH1/
SendMSG1
TxSer2/TxPOH2/
SendMSG2
TxSer3/TxPOH3/
SendMSG3
TxSer4/TxPOH4/
SendMSG4
I
I
I
I
Transmit Payload Data Serial Input/Transmit PLCP Path Overhead Input/
Send HDLC Message Request Input:
The function of these input pins depend upon whether the XRT79L74 is config-
ured to operate in the Clear-Channel Framer Mode, the High-Speed HDLC Con-
troller Mode or in the ATM/PLCP Mode.
Clear-Channel Framer Mode - TxSer:
If the XRT79L74 is configured to operate in the Clear-Channel Framer mode,
then these input pins function as the Transmit Payload Data Serial Input pins. In
this case, the local terminal equipment is expected to apply all outbound data
which is intended to be carried via the DS3 or E3 payload bits to these input pins.
The Transmit Payload Data Input Interface will sample the data, residing at the
TxSer input pin, upon the rising edge of TxInClk.
ATM/PLCP Mode - TxPOH:
If the XRT79L74 is configured to operate in the ATM Mode, and if within the ATM
Mode, the chip is also configured to operate in the PLCP Mode, then these input
pins function as the Transmit PLCP Path Overhead Input Pins. In this mode, the
user can externally insert desired path overhead byte values into the outbound
PLCP frames.
The Transmit PLCP Path Overhead Input Pin (and Port) become active whenever
the user asserts the TxPOHIns input pins by pulling them "High". In this case,
the data, residing upon the TxPOH input pins will be sampled upon the rising
edge of the TxPOHClk signals.
N
OTE
:
These input pins are inactive if the XRT79L74 is configured to operate in
the Direct-Mapped ATM Mode.
High-Speed HDLC Controller Mode - SendMSG:
If the XRT79L74 is configured to operate in the High-Speed HDLC Controller
Mode, then these input pins function as the Transmit HDLC Controller Input
Interface enable input pin.
If the user asserts these input pins by pulling them "High" then the Transmit
HDLC Controller Input Interface will proceed to latch the data, residing on the
TxHDLCDatn_[7:0] input pins, upon each rising edge of the TxHDLCClk signals.
All data that is latched into the Transmit HDLC Controller Input Interface for the
duration that the SendMSG input pin is "High" will be encapsulated into an HDLC
frame and ultimately transported via the payload bits of the outbound DS3 or E3
data stream.
If the user pulls these input pins "Low", then the Transmit HDLC Controller Input
Interface will cease latching the data, residing on the TxHDLCDatn_[7:0] bus.
N
OTE
:
These input pins are inactive if the XRT79L74 has been configured to
operate in the PPP Mode.
G1
C24
H4
C26
TxPOHFrame1
TxPOHFrame2
TxPOHFrame3
TxPOHFrame4
O
O
O
O
Transmit PLCP Frame Path Overhead Byte Serial Input Port - Beginning of
Frame indicator:
These output pins, along with the TxPOH, TxPOHClk, and the TxPOHIns pins
comprise the Transmit PLCP Frame POH Byte Insertion serial input port. These
particular pins pulse "High" when the Transmit PLCP POH Byte Insertion serial
input port is expecting the first bit of the Z6 byte at the TxPOH input pins.
N
OTE
:
These pins are only active if the XRT79L74 has been configured to
operate in the ATM/PLCP Mode.
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
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*