Precision Edge SY58012U Micrel, Inc. M9999-051408 hbwhelp@micrel.com or (408) 955-1690 k n i L t e h " />
參數(shù)資料
型號: SY55851UKI
廠商: Micrel Inc
文件頁數(shù): 8/8頁
文件大?。?/td> 0K
描述: IC GATE 3.0GHZ 100OHM 10-MSOP
標準包裝: 100
系列: SY55
邏輯類型: 可配置多功能
電路數(shù): 1
輸入數(shù): 2
施密特觸發(fā)器輸入:
輸出類型: 差分
電源電壓: 2.3 V ~ 3.6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 10-TFSOP,10-MSOP(0.118",3.00mm 寬)
供應商設備封裝: 10-MSOP
包裝: 管件
8
Precision Edge
SY58012U
Micrel, Inc.
M9999-051408
hbwhelp@micrel.com or (408) 955-1690
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SY58011U
7GHz, 1:2 CML Fanout Buffer/Translator
http://www.micrel.com/product-info/products/sy58011u.shtml
With Internal Input Termnations
SY58012U
5GHz, 1:2 LVPECL Fanout Buffer/Translator
http://www.micrel.com/product-info/products/sy58012u.shtml
With Internal Input Termination
SY58013U
6GHz, 1:2 Fanout Buffer/Translator w/400mV
http://www.micrel.com/product-info/products/sy58013u.shtml
LVPECL Outputs and Internal Terminations
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RELATED MICREL PRODUCTS AND SUPPORT DOCUMENTATION
R2
82
R2
82
ZO = 50
+3.3V*
VT = VCC —2V
R1
130
R1
130
+3.3V*
Figure 5. Parallel Termination-Thevenin Equivalent
Note 1. For +2.5V systems: R1 = 250, R2 = 62.5
Note 2. For +3.3V systems: R1 = 130, R2 = 82
Z = 50
50
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Rb C1
0.01F
(optional)
Figure 6. Three-Resistor “Y–Termination”
Note 1. Power-saving alternative to Thevenin termination.
Note 2. Placeterminationresistorsasclosetodestinationinputsaspossible.
Note 3. Rb resistor sets the DC bias voltage, equal to VT.
For +2.5V systems Rb = 19.
For +3.3V systems Rb = 46 to 50.
Note 4. C1 is an optional bypass capacitor intended to compensate for any
tr/tf mismatches.
LVPECL OUTPUT
+3.3V
ZO = 50
R2
82
+3.3V
R1
130
R1
130
R2
82
VT = VCC —2V
Q
/Q
R4
1k
R3
1.6k
VT = VCC —1.3V
Figure 7. Terminating Unused I/O
Note 1. Unused output (/Q) must be terminated to balance the output.
Note 2. For +2.5V systems: R1 = 250, R2 = 62.5, R3 = 1.25k,
R4 = 1.2k.
For +3.3V systems: R1 = 130, R2 = 82, R3 = 1k, R4 = 1.6k.
Note 3. Unused output pairs (Q and /Q) may be left floating.
LVPECL output have very low output impedance (open
emitter), and small signal swing which results in low EMI.
LVPECL is ideal for driving 50 and 100 controlled
impedance transmission lines. There are several techniques
in terminating the LVPECL output, as shown in Figures 5
through 7.
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