SY89828LHY(2007) View Datasheet(PDF) - Micrel

Part Name

Description

MFG CO.

SY89828LHY
(Rev.:2007)

3.3V 1GHz DUAL 1:10 PRECISION LVDS FANOUT BUFFER/TRANSLATOR WITH 2:1 INPUT MUX

Micrel 

MicreL, Inc.

LVPECL/LVDS INPUTS

VCC

Precision Edge®

SY89828L

VCC

1.9k

1.9k

LVPECL_CLK

75k

75k

/LVPECL_CLK

GND

Figure 1. Simplified LVPECL Input Stage

LVDS_CLK

/LVDS_CLK

1.4k

100Ω

1.4k

GND

Figure 2. Simplified LVDS Input Stage

LVDS OUTPUTS

LVDS stands for Low Voltage Differential Swing. LVDS

specifies a small swing of 350mV typical, on a nominal

1.25V common mode above ground. The common mode

voltage has tight limits to permit large variations in ground

between an LVDS driver and receiver. Also, change in

common mode voltage, as a function of data input, is also

kept tight, to keep EMI low.

vOD

vOH, vOL

vOH, vOL

100Ω

50Ω, –1%

50Ω, –1%

vOCM,

˘vOCM

GND

Figure 3. LVDS Differential Measurement

GND

Figure 4. LVDS Common Mode Measurement

QOUT

/QOUT

350mV

(typical)

Figure 5. Output Driver Signal Levels

(Single-Ended)

QOUT

/QOUT

750mV

QOUT — /QOUT

Figure 6. Output Driver Signal Levels

(Differential)

M9999-011907

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

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