參數(shù)資料
型號(hào): SY100EP195VTCTR
廠(chǎng)商: MICREL INC
元件分類(lèi): 延遲線(xiàn)
英文描述: ACTIVE DELAY LINE, COMPLEMENTARY OUTPUT, PQFP32
封裝: TQFP-32
文件頁(yè)數(shù): 3/18頁(yè)
文件大?。?/td> 249K
代理商: SY100EP195VTCTR
11
ECL Pro
SY100EP195V
Micrel
R2
82
R2
82
ZO = 50
+3.3V
Vt = VCC —2V
R1
130
R1
130
+3.3V
Figure 6a. Parallel Termination–Thevenin Equivalent
Note 1.
For +5.0V systems: R1 = 82
, R2 = 130.
Z = 50
Z = 50
50
50
50
+3.3V
Source
Destination
Rb
C1 (optional)
0.01
F
Figure 6b. Three-Resistor “Y–Termination”
Note 1.
Power-saving alternative to Thevenin termination.
Note 2.
Place termination resistors as close to destination inputs as possible.
Note 3.
R
b resistor sets the DC bias voltage, equal to Vt. For +3.3V systems Rb = 46 to 50. For +5V systems, Rb = 110.
+3.3V
ZO = 50
R2
82
+3.3V
R1
130
R1
130
R2
82
Vt = VCC —2V
Q
/Q
50
+3.3V
0.01
F
VBB
Figure 6c. Terminating Unused I/O
Note 1.
Unused output (/Q) must be terminated to balance the output.
Note 2.
Micrel's differential I/O logic devices include a V
BB reference pin .
Note 3.
Connect unused input through 50
to V
BB. Bypass with a 0.01F capacitor to VCC, not GND, as PECL is referenced to VCC.
TERMINATING PECL
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