Precision Edge SY89825U Micrel, Inc. M9999-011907 hbwhelp@micrel.com or (408) 955-1690 LVPECL TERMINA" />
參數(shù)資料
型號(hào): SY89825UHY
廠商: Micrel Inc
文件頁(yè)數(shù): 8/9頁(yè)
文件大小: 0K
描述: IC CLK BUF MUX TRNSL 2:22 64TQFP
標(biāo)準(zhǔn)包裝: 160
系列: Precision Edge®
類型: 扇出緩沖器(分配),多路復(fù)用器,變換器
電路數(shù): 1
比率 - 輸入:輸出: 2:22
差分 - 輸入:輸出: 是/是
輸入: LVDS,LVPECL
輸出: LVPECL
頻率 - 最大: 2GHz
電源電壓: 2.37 V ~ 3.6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 64-TQFP 裸露焊盤
供應(yīng)商設(shè)備封裝: 64-EP-TQFP
包裝: 托盤
產(chǎn)品目錄頁(yè)面: 1090 (CN2011-ZH PDF)
其它名稱: 576-2566
SY89825UHY-ND
8
Precision Edge
SY89825U
Micrel, Inc.
M9999-011907
hbwhelp@micrel.com or (408) 955-1690
LVPECL TERMINATION RECOMMENDATIONS
Output Considerations
Be sure to properly terminate all outputs as shown below, or
equivalent. For AC coupled applications, be sure to include a pull
down resistor at the output of each driver. The emmiter follower
outputs requires a DC current path to GND. Unused outputs can be
left floating with minimal impact on skew and jitter.
R2
82
R2
82
ZO = 50
+3.3V
Vt = VCC —2V
R1
130
R1
130
+3.3V
Figure 1. Parallel Termination–Thevenin Equivalent
Notes:
1. For +2.5V systems:
R1 = 250
R2 = 62.5
Z = 50
Z = 50
50
50
46
to 49
+3.3V
“source”“destination”
Rb
Figure 2. Three-Resistor “Y–Termination”
Notes:
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. For +3.3V systems Rb = 46 to 49.
4. Precision, low-cost 3-Resistor networks are available from resistor manufacturers such as Thin Film Technology (www.thinfilm.com).
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