参数资料
型号: SY88149CLKG
厂商: Micrel Inc
文件页数: 10/10页
文件大小: 0K
描述: IC AMP LIMITING PECL TTL 10-MSOP
标准包装: 100
类型: 限幅后置放大器
应用: 光纤学网络
安装类型: 表面贴装
封装/外壳: 10-TFSOP,10-MSOP(0.118",3.00mm 宽)
供应商设备封装: 10-MSOP
包装: 管件
产品目录页面: 1089 (CN2011-ZH PDF)
其它名称: 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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