- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄11766 > XRT81L27IV (Exar Corporation)IC LIU EI 7CH 3.3V 128TQFP PDF資料下載
參數(shù)資料
| 型號： | XRT81L27IV |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 21/30頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC LIU EI 7CH 3.3V 128TQFP |
| 標(biāo)準(zhǔn)包裝： | 72 |
| 應(yīng)用： | DECT |
| 接口： | 串行 |
| 電源電壓： | 3.3V |
| 封裝/外殼： | 128-LQFP |
| 供應(yīng)商設(shè)備封裝： | 128-TQFP（14x20） |
| 包裝： | 托盤 |
| 安裝類型： | 表面貼裝 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁當(dāng)前第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁
XRT81L27
á
SEVEN CHANNEL E1 LINE INTERFACE UNIT WITH CLOCK RECOVERY
REV. 1.1.0
26
3.4
THE PEAK DETECTOR AND SLICER BLOCK
After the incoming line signal has passed through the
Receive Equalizer block, it will next be routed to the
Slicer block. The purpose of the Slicer block is to
quantify a given bit-period (or symbol) within the in-
coming line signal as either a “1” or a “0”.
3.5
THE LOS DETECTOR BLOCK
The LOS Detector block, within each channel (of the
XRT81L27) was specifically designed to comply with
the LOS Declaration/Clearance requirements per
ITU-T G.775. As a consequence, the channel will de-
clare an LOS Condition, (by driving the LOS output
pin “High”) if the received line signal amplitude drops
to –20dB or below. Further, the channel will clear the
LOS Condition if the signal amplitude rises back up to
–15dB typically, or above. The XRT81L27 was de-
signed to meet the ITU-T G.775 specification timing
requirements for declaring and clearing the LOS indi-
cator. In particular, the XRT81L27 will declare an LOS
between 10 and 255 UI (or E1 bit periods) after the
actual time the LOS condition occurred. Further, the
XRT81L27 will clear the LOS indicator within 10 to
255 UI after restoration of the incoming line signal.
When operating in the Host mode, the LOS time can
be extended to 4096 zeros by the activation of the
EXLOS bit in the Command Control Register. This
will provide for those cases where the G.775 specifi-
cation value is not long enough,
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MS27473T20A35S | CONN PLUG 79POS STRAIGHT W/SCKT |
| 413990-2 | CONN JACK SMB VERTICAL NICKEL |
| 5226978-1 | CONN JACK BNC RT/ANG 50 OHM TIN |
| D38999/24FB99SN | CONN RCPT 7POS JAM NUT W/SCKT |
| 1-5225398-5 | CONN JACK BNC RD316DB DUAL CRIMP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XRT81L27IV-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 |
| XR-T8205CP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telephone Ringer |
| XR-T8205P | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telephone Ringer |
| XRT82D20 | 制造商:EXAR 制造商全稱:EXAR 功能描述:SINGLE CHANNEL E1 LINE INTERFACE UNIT |
| XRT82D20_06 | 制造商:EXAR 制造商全稱:EXAR 功能描述:SINGLE CHANNEL E1 LINE INTERFACE UNIT |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。