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參數(shù)資料
| 型號： | SY55857LKG |
| 廠商： | MICREL INC |
| 元件分類： | 其它接口 |
| 英文描述： | 3.3V, 2.5Gbps ANY INPUT-to-LVPECL DUAL TRANSLATOR |
| 中文描述： | SPECIALTY INTERFACE CIRCUIT, PDSO10 |
| 封裝： | 3 X 3 MM, LEAD FREE, MSOP-10 |
| 文件頁數(shù)： | 7/8頁 |
| 文件大?。?/td> | 77K |
| 代理商： | SY55857LKG |
7
SuperLite
SY55857L
Micrel, Inc.
M9999-082306
hbwhelp@micrel.com or (408) 955-1690
LVPECL OUTPUT TERMINATION
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 13 through 15.
R2
82
R2
82
*Note. For +2.5V systems,
R1 = 250
,
R2 = 62.5
Z
O
= 50
Z
O
= 50
+3.3V*
+3.3V*
V
T
= V
CC
–
2V
R1
130
R1
130
+3.3V*
SY58021U
Figure 13. Parallel Termination-Thevenin Equivalent
Notes:
1. For +2.5V systems: R1 = 250
, R2 = 62.5
.
2. For +3.3V systems: R1 = 130
, R2 = 82
.
Z = 50
Z = 50
50
50
50
+3.3V
+3.3V
“
source
”
“
destination
”
R
b
*
C1 (optional)
0.01
μ
F
* For +2.5V, Rb = 19
* For +3.3V, Rb = 46
to 50
Notes:
1. Power saving alternative to Thevenin termination.
3. Rb resistor sets the DC bias voltage, equal to VT.
SY58021U
V
DD
Figure 14. Three-Resistor
“
Y-Termination
”
Notes:
1. Power-saving alternatives to Thevenin termination.
2. Place termination resistors as close to destination inputs as possible.
3. Rb resistor sets the DC bias voltage, equal to V
T
.
For +2.5V systems: R
b
= 19
.
For +3.3V systems: R
b
= 46
to 50
.
4. C1 is an optional bypass capacitor intended to compensate for any t
r
/t
f
mismatches.
R2
82
R2
82
*Note:
For +2.5V systems,
R1 = 250
,
R2 = 62.5
Z
O
= 50
Z
O
= 50
+3.3V*
+3.3V*
V
T
= V
CC
–
2V
R1
130
R1
130
+3.3V*
SY58021U
Figure 15. Terminating Unused I/O
Notes:
1. Unused output (/Q) must be terminated to balance the output.
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
.
3. Unused output pairs (Q and /Q) may be left floating.
相關PDF資料 |
PDF描述 |
|---|---|
| SY55857LKGTR | 3.3V, 2.5Gbps ANY INPUT-to-LVPECL DUAL TRANSLATOR |
| SY55858UHG | 2.5V/3.3V 3.0GHZ DUAL 2 x 2 CML CROSSPOINT SWITCH W/INTERNAL TERMINATION |
| SY55858UHGTR | 2.5V/3.3V 3.0GHZ DUAL 2 x 2 CML CROSSPOINT SWITCH W/INTERNAL TERMINATION |
| SY55858UHI | 2.5V/3.3V 3.0GHZ DUAL 2 x 2 CML CROSSPOINT SWITCH W/INTERNAL TERMINATION |
| SY55858UHITR | 2.5V/3.3V 3.0GHZ DUAL 2 x 2 CML CROSSPOINT SWITCH W/INTERNAL TERMINATION |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SY55857LKG TR | 功能描述:轉換 - 電壓電平 Dual 2-5 GHz Any Input to LV PECL Translator (I Temp, Green) RoHS:否 制造商:Micrel 類型:CML/LVDS/LVPECL to LVCMOS/LVTTL 傳播延遲時間:1.9 ns 電源電流:14 mA 電源電壓-最大:3.6 V 電源電壓-最小:3 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:MLF-8 |
| SY55857LKGTR | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:3.3V, 2.5Gbps ANY INPUT-to-LVPECL DUAL TRANSLATOR |
| SY55857LKI | 功能描述:IC TRANSLATOR DUAL LVPECL 10MSOP RoHS:否 類別:集成電路 (IC) >> 邏輯 - 變換器 系列:SY55 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:100 系列:- 邏輯功能:變換器，雙向 位數(shù):2 輸入類型:CMOS 輸出類型:CMOS 數(shù)據(jù)速率:16Mbps 通道數(shù):2 輸出/通道數(shù)目:1 差分 - 輸入:輸出:無/無 傳輸延遲（最大）:15ns 電源電壓:1.65 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 封裝/外殼:10-UFQFN 供應商設備封裝:10-UTQFN（1.4x1.8） 包裝:管件 |
| SY55857LKI TR | 功能描述:IC TRNASLATOR DUAL 3.3V 10-MSOP RoHS:否 類別:集成電路 (IC) >> 邏輯 - 變換器 系列:SY55 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:100 系列:- 邏輯功能:變換器，雙向 位數(shù):2 輸入類型:CMOS 輸出類型:CMOS 數(shù)據(jù)速率:16Mbps 通道數(shù):2 輸出/通道數(shù)目:1 差分 - 輸入:輸出:無/無 傳輸延遲（最大）:15ns 電源電壓:1.65 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 封裝/外殼:10-UFQFN 供應商設備封裝:10-UTQFN（1.4x1.8） 包裝:管件 |
| SY55857LKITR | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:3.3V, 2.5Gbps ANY INPUT-to-LVPECL DUAL TRANSLATOR |
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