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參數(shù)資料
型號(hào): SY89855UMG TR
廠商: Micrel Inc
文件頁數(shù): 3/13頁
文件大?。?/td> 0K
描述: IC MUX 4:1 LVPECL PREC LP 32-MLF
標(biāo)準(zhǔn)包裝: 1,000
系列: SY89
類型: 多路復(fù)用器
電路: 1 x 4:1
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: 32-VFQFN 裸露焊盤,32-MLF?
供應(yīng)商設(shè)備封裝: 32-MLF?(5x5)
包裝: 帶卷 (TR)
其它名稱: SY89855UMGTR
SY89855UMGTR-ND
Micrel, Inc.
SY89855U
August 2007
11
M9999-082907-C
hbwhelp@micrel.com or (408) 955-1690
Output Interface Applications
LVPECL has high input impedance, very low output
(open emitter) impedance, and small signal swing,
which result in low EMI. LVPECL is ideal for driving
50 and 100 controlled impedance transmission
lines. There are different techniques for terminating
LVPECL
outputs:
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:
For a 2.5V system, R1 = 250, R2 = 62.5.
Figure 4a. Parallel Thevenin-Equivalent
Termination
Note:
1. For a 2.5V system, Rb = 19.
Figure 4b. Parallel Termination
(3-Resistor)
Note:
For a 2.5V system, R = 50.
Figure 4c. AC-Coupled Termination
Note:
For a 2.5V system, R1 = 250, R2 = 62.5 .
Figure 4d. Parallel Thevenin-Equivalent
Termination
Related Product and Support Documentation
Part Number
Function
Data Sheet Link
SY58029U
Ultra Precision Differential LVPECL 4 :1
MUX with 1 :2 Fanout Internal Termination
www.micrel.com/product-info/products/sy58029u.shtml.
HBW Solutions
New Products and Applications
www.micrel.com/product-info/products/solutions.shtml
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