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參數(shù)資料
| 型號(hào)： | XRT85L61IGTR-F |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 7/19頁 |
| 文件大小： | 0K |
| 描述： | IC BITS CLOCK EXTRACTOR 28STSSOP |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 功能： | BITS 時(shí)鐘提取器 |
| 接口： | E1，T1 |
| 電路數(shù)： | 1 |
| 電源電壓： | 3.14 V ~ 3.47 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 28-TSSOP |
| 包裝： | 帶卷 (TR) |
| 包括： | 無晶數(shù)字式抖動(dòng)衰減器 |
xr
XRT85L61
REV. 1.0.2
BITS (BUILDING INTEGRATED TIMING SUPPLY) CLOCK EXTRACTOR
14
2.0
AIS DETECTION TIMING
In E1 mode, AIS is set when the received incoming signal has 2 or less Zero’s in a sequence of 512 bits. AIS
will stay “High” for 250
s and AIS is cleared upon receiving three or more Zero’s in the subsequent 512 bits
(250
s) time-frame. Figure 9 shows the AIS timing.
In T1 mode, AIS is detected if the received input signal has 4 or less Zero’s in a sequence of 4632 bits (3ms)
and AIS is cleared when 5 or more Zero’s are detected in the subsequent 4632 bits (3 ms) time-frame.
Figure 10 shows the AIS timing for T1 mode.
3.0 LOSS OF SIGNAL
The XRT85L61 Receive Loss of Signal (RLOS) monitoring circuits consist of both analog and digital schemes.
Both E1 and T1 meet G.775 RLOS declare and clear criteria. In E1 and 64kb/s modes, RLOS will be set if the
input pattern exceeds 32 bit consecutive zeros. In T1 mode, RLOS will go "High" if the number of consecutive
zeros exceeds 175.
The XRT85L61 RLOS detection circuit also reports RLOS if the input signal level drops below 220mVp (typical)
and RLOS is cleared when the input signal level returns to more than 380mVp (typical) when the input pattern
meets 12.5% density over a 32 bit period.
FIGURE 9. AIS DETECTION FOR E1 MODE
FIGURE 10. AIS DETECTION FOR T1 MODE
E1
DATA
AIS
250
s
250
s
00
0
3 ms
T1
DATA
AIS
00
0
00
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XRT86L30 | 制造商:EXAR 制造商全稱:EXAR 功能描述:SINGLE T1/E1/J1 FRAMER/LIU COMBO |
| XRT86L30_07 | 制造商:EXAR 制造商全稱:EXAR 功能描述:SINGLE T1/E1/J1 FRAMER/LIU COMBO |
| XRT86L30_08 | 制造商:EXAR 制造商全稱:EXAR 功能描述:SINGLE T1/E1/J1 FRAMER/LIU COMBO |
| XRT86L30ES | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC pin LQFP pkg 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 |
| XRT86L30IB | 制造商:EXAR 制造商全稱:EXAR 功能描述:SINGLE T1/E1/J1 FRAMER/LIU COMBO |
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