10

SY58035U

Micrel, Inc.

M9999-073010

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

OUTPUTINTERFACEAPPLICATIONS

R2

82Ω

R2

82Ω

+3.3V

+3.3V

R1

130Ω

R1

130Ω

+3.3V

Note: For 2.5V systems:

R1 = 250Ω, R2 = 62.5Ω

Figure4a.ParallelThevenin-Equivalent

Termination

Z = 50Ω

Z = 50Ω

50Ω

50Ω

50Ω

V

3

.

3

+

V

3

.

3

+

n

o

it

a

n

it

s

e

d

e

c

r

u

o

s

Rb C1

0.01µF

(optional)

Note: For 2.5V systems:

Rb = 19Ω

Figure4b.ParallelTermination

(3-Resistor)

PartNumber Function

DataSheetLink

SY58034U

6GHz, 1:6 CML Fanout Buffer with 2:1

http://www.micrel.com/product-info/products/sy58034u.shtml

MUX Input and Internal I/O Termination

SY58036U

6GHz, 1:6 400mV LVPECL Fanout Buffer with 2:1

http://www.micrel.com/product-info/products/sy58036u.shtml

MUX Input and Internal Termination

www.amkor.com/products/notes_papers/MLF_AppNote_0902.pdf

HBW Solutions

New Products and Applications

www.micrel.com/product-info/products/solutions.shtml

RELATED MICREL PRODUCTS AND SUPPORT DOCUMENTATION

LVPECL has high input impedance, very low output (open

emitter) impedance, and small signal swing, which results in

lowEMI.LVPECLisidealdriving50Ωand100Ωcontrolled

impedance transmission lines. There are several techniques

for terminating the LVECL output: parallel-thevenin equivalent

and parallel termination (3-resistor). Unused output pairs

maybeleftfloating.However,single-endedoutputsmustbe

terminated, or balanced.