Datasheet > SPFMPR302

SPFMPR302

更新时间： 2024-01-04 15:53:45

品牌	Logo	应用领域
安华高科 - AVAGO		放大器光纤
页数	文件大小	规格书
7页	647K
描述
FIBER OPTIC RECEIVER, 25Mbps, THROUGH HOLE MOUNT, CAI PACKAGE-4

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SPFMPR302 技术参数

Top Layer with 180˚ version of the pigtail:

Bottom Layer (seen from the top side of the PCB):

Bottom Layer: Bottom side / positions

Other items

• The shown circuit for the –3dB attenuation is just a proposal. Also any other circuit which can double the value of

Rext is permitted.

• Due to the fact that the optical average level jumps if the power control signal (/-3dB) is toggled, LOCK/ coding –

errors can occur at the subsequent device for a short time. This is not very critical, since it occurs only in diagnosis

mode. After a time of 10ms, the device should lock again if the optical attenuation between the devices is not too

high.

• The Rx and Tx signals can be measured by using standard probes (>1M/<10pF). However, if the signal quality is very

bad, and the LOCK signal of the MOST chip is ﬂaky, connecting a passive probe to the Rx signal can cause the MOST

chip to lock better or worse to the signal. This is due to the capacitance of the analog probe which is usually in the

range of 8..12pF, which shifts the phase and PWD of the signal. In this case an active probe with a capacitance of less

than 1pF is recommended.

• The reference test board which corresponds to the layout examples above, is available at the

Oasis SiliconSystems AG.

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