SY56572XRMG datasheet(7/11 Pages) MICREL

Part #	SY56572XRMG

Description	Low Voltage 1.2V/1.8V/2.5V CML 4:1 MUX with 1:2 FANOUT 6.4Gbps with EQUALIZATION

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Manufacturer	MICREL [Micrel Semiconductor]

Direct Link	http://www.micrel.com

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7 / 11 page

Micrel, Inc.

SY56572XR

April 2010

7

M9999-041510-A

hbwhelp@micrel.com or (408) 955-1690

Functional Description

CML Output Termination with Vcco 1.2V

For VCCO of 1.2V, Figure 5a, terminate the output with

50

Ωto 1.2V, not 100Ω differentially across the outputs. If

AC coupling is used, Figure 5d, terminate into 50

Ω to

1.2V before the coupling capacitor and then connect to a

high value resistor to a reference voltage. Any unused

output pair with VCCO at 1.2V needs to be terminated,

do not leave floating.

CML Output Termination with VCCO 1.8V, 2.5V

For VCCO of 1.8V or 2.5V, Figure 5a/b, terminate with

either 50

Ω to 1.8V or 100Ω differentially across the

outputs. AC-or DC-coupling is fine. For best signal

integrity, terminate any unused output pairs.

Timing Diagrams

Figure 1a. IN-to-Q Timing Diagram

Figure 1b. SEL-to-Q Timing Diagram

(Qx state can be high or low depending on input data)

Similar Part No. - SY56572XRMG

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