- 您現(xiàn)在的位置：買賣IC網 > PDF目錄9660 > XRT91L34IVTR-F (Exar Corporation)IC MULTIRATE CDR QUAD 128LQFP PDF資料下載
參數(shù)資料
| 型號： | XRT91L34IVTR-F |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 9/38頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC MULTIRATE CDR QUAD 128LQFP |
| 標準包裝： | 750 |
| 類型： | 時鐘和數(shù)據(jù)恢復（CDR），扇出緩沖器（分配），多路復用器 |
| PLL： | 是 |
| 主要目的： | SONET/SDH，STS，STM |
| 輸入： | LVDS，LVPECL |
| 輸出： | LVDS，LVPECL |
| 電路數(shù)： | 1 |
| 比率 - 輸入:輸出： | 1:2 |
| 差分 - 輸入:輸出： | 是/是 |
| 頻率 - 最大： | 622.08MHz |
| 電源電壓： | 1.71 V ~ 3.465 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 128-LQFP |
| 供應商設備封裝： | 128-LQFP（14x14） |
| 包裝： | 帶卷 (TR) |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁當前第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頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁
XRT91L34
17
REV. 1.0.1
QUAD CHANNEL MULTIRATE STS-12/3/1 AND STM-4/1/0 SONET/SDH CDR
2.4
Internal Digital Loss of Signal and External Signal Detection
XRT91L34 has an integrated Digital Loss of Signal (DLOS) circuit and supports external Signal Detection
(SDEXT) for detecting and determining received signal integrity. The internal DLOS circuit monitors the
incoming data stream. If the incoming data stream has no transition for more than 2.5
s, Loss of Signal is
declared. This LOS condition will be cleared when the circuit detects transitions in a 128
s interval sliding
window. Pulling the DLOSDIS pin signal to a high level in hardware mode or setting DLOSDIS bit in host mode
will disable the internal DLOS detection circuit to permit the framer/mapper interface to determine the Loss of
Signal declaration and clearance criteria for specific applications. The external Signal Detect function is
supported by the SDEXT input. An LVCMOS/LVTTL signal comes from the optical module through an output
usually called “SD” or “FLAG” which indicates the lack or presence of optical power. Depending on the
manufacturer of these devices, the polarity of this signal can be either active "Low" or active "High." The
SDEXT and POL inputs are Exclusive OR’ed to determine external Loss of Signal (LOS) condition. In the event
that internal DLOS is detected or an external SDEXT input indicates signal absence, the recovered serial data
output will be forced to a logic state "0," and the LOS status register is set whenever the host mode serial
microprocessor interface is active. This acts as a receive data mute upon LOS function to prevent data
chattering and to prevent random noise from being misinterpreted as valid incoming data. Figure 7 shows the
Loss of Signal Detection logic circuit. Table 4 specifies LOS declaration polarity settings.
FIGURE 7. LOSS OF SIGNAL DECLARATION CIRCUIT
TABLE 4: EXTERNAL LOS DECLARATION POLARITY SETTING
SDEXT
POL
INTERNAL SIGNAL DETECT
LOS BIT STATE
(HOST MODE ONLY)
RXDO[3:0]P/N
0
Active Low. Optical signal presence
indicated by SDEXT logic 0 input from
optical module.
Low
Normal
Operation
0
1
Active High. Optical signal presence
indicated by SDEXT logic 1 input from
optical module.
High
LOS declared
Muted
1
0
Active Low. Optical signal presence
indicated by SDEXT logic 0 input from
optical module.
High
LOS declared
Muted
1
Active High. Optical signal presence
indicated by SDEXT logic 1 input from
optical module.
Low
Normal
Operation
DLOSDIS
(Internal) DLOS Detect
(External) SDEXT
LOS Declaration
POL
and
Recovered Data Mute
相關PDF資料 |
PDF描述 |
|---|---|
| VI-210-MX-F3 | CONVERTER MOD DC/DC 5V 75W |
| VI-J4D-MX-F3 | CONVERTER MOD DC/DC 85V 75W |
| VI-J4D-MX-F2 | CONVERTER MOD DC/DC 85V 75W |
| VI-J4D-MX-F1 | CONVERTER MOD DC/DC 85V 75W |
| VI-J4B-MX-F4 | CONVERTER MOD DC/DC 95V 75W |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| XRT91L80 | 制造商:EXAR 制造商全稱:EXAR 功能描述:2.488/2.666 GBPS STS-48/STM-16 SONET/SDH TRANSCEIVER |
| XRT91L80_0507 | 制造商:EXAR 制造商全稱:EXAR 功能描述:2.488/2.666 GBPS STS-48/STM-16 SONET/SDH TRANSCEIVER |
| XRT91L80ES | 功能描述:總線收發(fā)器 Transceiver RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
| XRT91L80IB | 功能描述:總線收發(fā)器 Transceiver RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
| XRT91L80IB-F | 功能描述:總線收發(fā)器 Transceiver RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復。