參數(shù)資料
型號: SY89475U
廠商: Micrel Semiconductor,Inc.
英文描述: Precision LVPECL 2:1 Multiplexer with 1:2 Fanout and Internal Termination
中文描述: 精密的LVPECL 2:1多路復(fù)用器與1:2扇出和內(nèi)部終端
文件頁數(shù): 10/11頁
文件大小: 565K
代理商: SY89475U
Micrel, Inc.
SY89473U
LVPECL Output Interface Applications
LVPECL has a high input impedance, a very low
output impedance (open emitter), and a small signal
swing which results in low EMI. LVPECL is ideal for
driving
50
-
and-100
-controlled
transmission lines. There are several techniques for
terminating the LVPECL output including: Parallel
Termination-Thevenin
Termination
(3-resistor),
Termination. Unused output pairs may be left
floating. However, single-ended outputs must be
terminated, or balanced.
May 2005
10
M9999-052405
hbwhelp@micrel.com
or (408) 955-1690
impedance
Equivalent,
and
Parallel
AC-coupled
Note:
1.
Figure 4a. Parallel Termination-Thevenin Equivalent
For +2.5V systems, R1 = 250
, R2 = 62.5
.
Note:
1.
2.
Power-saving alternative to Thevenin termination.
Place termination resistors as close to destination inputs as
possible.
Rb resistor sets the DC bias voltage, equal to V
T
.
For 2.5V systems, Rb = 19
.
3.
4.
Figure 4b. Parallel Termination (3-Resistor)
Related Product and Support Information
Part Number
Function
SY89474U
Precision LVDS 2:1 Multiplexer with
1:2 Fanout and Internal Termination
SY89475U
Precision CML 2:1 Multiplexer with
1:2 Fanout and Internal Termination
MLF
TM
Application Note
HBW
Solutions
Data Sheet Link
www.micrel.com/product-info/products/sy89474u.shtml
www.micrel.com/product-info/products/sy89475u.shtml
www.amkor.com/products/notes_papers/MLFAppNote.pdf
www.micrel.com/product-info/products/solutions.shtml
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