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參數(shù)資料
| 型號： | XRT7295ATIWTR-F |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 6/18頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC RCVR DS3/SONET STS-1 20SOJ |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 類型： | 接收器 |
| 驅(qū)動器/接收器數(shù)： | 1/1 |
| 規(guī)程： | DS3，STS-1 |
| 電源電壓： | 4.75 V ~ 5.25 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-BSOJ |
| 供應(yīng)商設(shè)備封裝： | 20-SOJ |
| 包裝： | 帶卷 (TR) |
XRT7295AT
14
Rev.1.20
TIMING CHARACTERISTICS
Test Conditions: All Timing Characteristics are Measrured with 10pF Loading, -40°C ± TA ± +85°C, VDD =
5V ±10%
Symbol
Parameter
Min
Typ
Max
Unit
tRCH1RCH2
Clock Rise Time (10% - 90%)
4
ns
tRCL2RCL1
Clock Fall Time (10% - 90%)
4
ns
tRCHRDV
Receive Propagation Delay1
0.6
3.7
ns
Clock Duty Cycle
45
50
55
%
Table 7. System Interface Timing Characteristics
Figure 11. Timing Diagram for System Interface
RCLK
RPDATA
OR
RNDATA
(RC)
(RD)
tRCHRDV
tRCL2RCL1
tRCH1RCH2
tRCLRDX
tRDVRCL
BOARD LAYOUT CONSIDERATIONS
Power Supply Bypassing
Figure 12
illustrates the recommended power supply
bypassing network. A 0.1mF capacitor bypasses the
digital supplies. The analog supply VDDA is bypassed by
using a 0.1mF capacitor and a shield bead that removes
significant amounts of high-frequency noise generated by
the system and by the device logic. Good quality,
high-frequency (low lead inductance) capacitors should
be used. Finally, it is most important that all ground
connections be made to a low-impedance ground plane.
Receive Input
The connections to the receive input pin, RIN, must be
carefully considered. Noise-coupling must be minimized
along the path from the signal entering the board to the
input pin. Any noise coupled into the XRT7295AT input
directly degrades the signal-to-noise ratio of the input
signal and may degrade sensitivity.
PLL Filter Capacitor
The PLL filter capacitor between pins LPF1 and LPF2
must be placed as close to the chip as possible. The LPF1
and LPF2 pins are adjacent, allowing for short lead
lengths with no crossovers to the external capacitor.
Noise-coupling into the LPF1 and LPF2 pins may
degrade PLL performance.
Handling Precautions
Although protection circuitry has been designed into this
device, proper precautions should be taken to avoid
exposure to electrostatic discharge (ESD) during
handling and mounting.
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| XRT7295CTIW | 功能描述:總線接收器 DS3/E3/SONET STS-1 Line Receiver RoHS:否 制造商:Texas Instruments 接收機(jī)數(shù)量:4 接收機(jī)信號類型:Differential 接口類型:EIA/TIA-422-B, V.11 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TSSOP-16 封裝:Reel |
| XRT7295CTIW-F | 功能描述:總線接收器 DS3/E3/SONET STS-1 Line Receiver RoHS:否 制造商:Texas Instruments 接收機(jī)數(shù)量:4 接收機(jī)信號類型:Differential 接口類型:EIA/TIA-422-B, V.11 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TSSOP-16 封裝:Reel |
| XRT7295E | 制造商:EXAR 制造商全稱:EXAR 功能描述:INTEGRATED LINE RECEIVER |
| XR-T7295E | 制造商:EXAR 制造商全稱:EXAR 功能描述:INTEGRATED LINE RECEIVER |
| XR-T7295E-1EIP | 制造商:EXAR 制造商全稱:EXAR 功能描述:INTEGRATED LINE RECEIVER |
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