Precision Edge SY89834U Micrel, Inc. M9999-080505 hbwhelp@micrel.com or (408) 955-1690 TERMINATION RE" />
參數(shù)資料
型號(hào): SY88149CLKG
廠商: Micrel Inc
文件頁(yè)數(shù): 10/10頁(yè)
文件大小: 0K
描述: IC AMP LIMITING PECL TTL 10-MSOP
標(biāo)準(zhǔn)包裝: 100
類(lèi)型: 限幅后置放大器
應(yīng)用: 光纖學(xué)網(wǎng)絡(luò)
安裝類(lèi)型: 表面貼裝
封裝/外殼: 10-TFSOP,10-MSOP(0.118",3.00mm 寬)
供應(yīng)商設(shè)備封裝: 10-MSOP
包裝: 管件
產(chǎn)品目錄頁(yè)面: 1089 (CN2011-ZH PDF)
其它名稱(chēng): 576-3393-5
9
Precision Edge
SY89834U
Micrel, Inc.
M9999-080505
hbwhelp@micrel.com or (408) 955-1690
TERMINATION RECOMMENDATIONS
R2
82
R2
82
ZO = 50
+3.3V
Vt = VCC —2V
R1
130
R1
130
+3.3V
Figure 4a. Parallel Termination–Thevenin Equivalent
Note:
1. For +2.5V systems: R1 = 250
, R2 = 62.5
For +3.3V systems: R1 = 130
, R2 = 82
Z = 50
Z = 50
50
50
50
+3.3V
“source”“destination”
Rb
VCC
C1
0.01F
(optional)
Figure 4b. 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 = 50. For +2.5V systems Rb = 19.
+3.3V
ZO = 50
R2
82
+3.3V
R1
130
R1
130
R2
82
Vt = VCC —2V
Q
/Q
R3
1k
R4
1.6k
Vt = VCC —1.3V
Figure 4c. Terminating Unused LVPECL 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.
2. Unused output pairs (Q and /Q) may be left floating.
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