hbwhelp@micrel.com or (408) 955-1690 LVPECL Output Int" />
參數(shù)資料
型號(hào): SY89473UMG TR
廠商: Micrel Inc
文件頁(yè)數(shù): 2/11頁(yè)
文件大?。?/td> 0K
描述: IC MUX 2:1 LVDS 1:2 FANOUT 24MLF
標(biāo)準(zhǔn)包裝: 1,000
系列: SY89
類型: 多路復(fù)用器
電路: 1 x 2:1
獨(dú)立電路: 1
電壓電源: 單電源
電源電壓: 3 V ~ 3.6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 24-VFQFN 裸露焊盤,24-MLF?
供應(yīng)商設(shè)備封裝: 24-MLF?(4x4)
包裝: 帶卷 (TR)
其它名稱: SY89473UMGTR
SY89473UMGTR-ND
Micrel, Inc.
SY89473U
May 2007
10
M9999-052207-B
hbwhelp@micrel.com or (408) 955-1690
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
impedance
transmission lines. There are several techniques for
terminating the LVPECL output including: Parallel
Termination-Thevenin
Equivalent,
Parallel
Termination
(3-resistor),
and
AC-coupled
Termination. Unused output pairs may be left
floating. However, single-ended outputs must be
terminated, or balanced.
Note:
1.
For +2.5V systems, R1 = 250, R2 = 62.5.
Figure 4a. Parallel Termination-Thevenin Equivalent
Note:
1.
Power-saving alternative to Thevenin termination.
2.
Place termination resistors as close to destination inputs as
possible.
3.
Rb resistor sets the DC bias voltage, equal to VT.
4.
For 2.5V systems, Rb = 19.
Figure 4b. Parallel Termination (3-Resistor)
Related Product and Support Information
Part Number
Function
Data Sheet Link
SY89474U
Precision LVDS 2:1 Multiplexer with
1:2 Fanout and Internal Termination
www.micrel.com/product-info/products/sy89474u.shtml
SY89475U
Precision CML 2:1 Multiplexer with
1:2 Fanout and Internal Termination
www.micrel.com/product-info/products/sy89475u.shtml
HBW
Solutions
New Products and Applications
www.micrel.com/product-info/products/solutions.shtml
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