ST802RT1B datasheet(47/58 Pages) STMICROELECTRONICS

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ST802RT1B データシート(PDF) 47 Page - STMicroelectronics

部品番号	ST802RT1B

部品情報	10/100 real-time Ethernet 3.3 V transceiver

PDF	58 Pages

Scroll/Zoom	100%

メーカー	STMICROELECTRONICS [STMicroelectronics]

ホームページ	http://www.st.com

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47 / 58 page

ST802RT1A, ST802RT1B

Device operation

Doc ID 17049 Rev 1

47/58

7.21

PECL receiver

The data signals coming from the optical transceiver are in PECL format and need to be

converted to CMOS level before being transmitted to the data and clock recovery, and to the

digital portion.

The data is sampled by the optical transceiver, but the data stream is related to the clock of

the transmitting transceiver, so it needs to be recovered, re-sampled and aligned to the RX

clock.

This function and all the timing involved are assumed to be compatible with that currently

available for the 100TX (twisted pair), so no modifications are required for this circuit.

Figure 9.

Implementation of the PECL TX section

Figure 10.

Implementation of the PECL RX section

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