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MC10H641 データシート(PDF) 6 Page - ON Semiconductor

部品番号 MC10H641
部品情報  Single Supply PECL to TTL 1:9 Clock Distribution Chip
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メーカー  ONSEMI [ON Semiconductor]
ホームページ  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

MC10H641 データシート(HTML) 6 Page - ON Semiconductor

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MC10H641, MC100H641
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6
propagation delay for the device in question. A more
common use would be to establish an ambient temperature
range for the H641’s in the system and utilize the above
methodology to determine the potential increased skew of
the distribution network. Note that for this information if the
TPD versus Temperature curve were linear the calculations
would not be required. If the curve were linear over all
temperatures a simple temperature coefficient could be
provided.
Figure 3. TPD versus Junction Temperature
−30
JUNCTION TEMPERATURE (
5.2
−10
10
30
50
70
90
110
130
°C)
5.4
5.6
5.8
6.0
6.2
6.4
TPHL
TPLH
VCC Dependence
TTL and CMOS devices show a significant propagation
delay dependence with VCC. Therefore the VCC variation in
a system will have a direct impact on the total skew of the
clock distribution network. When calculating the skew
between two devices on a single board it is very likely an
assumption of identical VCC’s can be made. In this case the
number provided in the data sheet for part−to−part skew
would be overly conservative. By using Figure 4 the skew
given in the data sheet can be reduced to represent a smaller
or zero variation in VCC. The delay variation due to the
specified VCC variation is ≈ 270 ps. Therefore, the 1 ns
window on the data sheet can be reduced by 270 ps if the
devices in question will always experience the same VCC.
The distribution of the propagation delay ranges given in the
data sheet is actually a composite of three distributions
whose means are separated by the fixed difference in
propagation delay at the typical, minimum and maximum
VCC.
Figure 4. DTPD versus VCC
4.75
VCC (V)
−140
4.85
4.95
5.05
5.15
5.25
−100
−60
−20
20
60
100
140
TPLH
TPHL
Capacitive Load Dependence
As with VCC the propagation delay of a TTL output is
intimately tied to variation in the load capacitance. The skew
specifications given in the data sheet, of course, assume
equal loading on all of the outputs. However situations could
arise where this is an impossibility and it may be necessary
to estimate the skew added by asymmetric loading. In
addition the propagation delay numbers are provided only
for 50 pF loads, thus necessitating a method of determining
the propagation delay for alternative loads.
Figure 5 shows the relationship between the two
propagation delays with respect to the capacitive load on the
output. Utilizing this graph and the 50 pF limits the
specification of the H641 can be mapped into a spec for
either a different value load or asymmetric loads.
Figure 5. TPD versus Load
0
CAPACITIVE LOAD (pF)
0.75
10
20
30
40
50
60
70
80
90 100
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
TPHL
TPLH
MEASURED
THEORETICAL


同様の部品番号 - MC10H641_06

メーカー部品番号データシート部品情報
logo
ON Semiconductor
MC10H641 ONSEMI-MC10H641 Datasheet
138Kb / 8P
   SINGLE SUPPLY PECL-TTL 1:9 CLOCK DISTRIBUTION CHIP
1996 REV 3
More results

同様の説明 - MC10H641_06

メーカー部品番号データシート部品情報
logo
ON Semiconductor
MC10H641 ONSEMI-MC10H641 Datasheet
138Kb / 8P
   SINGLE SUPPLY PECL-TTL 1:9 CLOCK DISTRIBUTION CHIP
1996 REV 3
logo
Micrel Semiconductor
SY100S811 MICREL-SY100S811 Datasheet
111Kb / 5P
   SINGLE SUPPLY 1:9 PECL/TTL-TO-PECL
SY100S811 MICREL-SY100S811_07 Datasheet
100Kb / 6P
   SINGLE SUPPLY 1:9 PECL/TTL-TO-PECL
SY10H641 MICREL-SY10H641 Datasheet
84Kb / 5P
   SINGLE SUPPLY 1:9 PECL-TO-TTL
SY10H641 MICREL-SY10H641_06 Datasheet
73Kb / 6P
   SINGLE SUPPLY 1:9 PECL-TO-TTL
SY10H641A MICREL-SY10H641A Datasheet
127Kb / 5P
   SINGLE SUPPLY 1:9 PECL-TO-TTL
SY10H641L MICREL-SY10H641L Datasheet
86Kb / 5P
   3.3V SINGLE SUPPLY 1:9 PECL-TO-TTL
SY10H641L MICREL-SY10H641L_06 Datasheet
75Kb / 6P
   3.3V SINGLE SUPPLY 1:9 PECL-TO-TTL
logo
ON Semiconductor
MC10H646 ONSEMI-MC10H646_06 Datasheet
129Kb / 8P
   PECL/TTL?뭈TL 1:8 Clock Distribution Chip
November, 2006 ??Rev. 5
logo
Micrel Semiconductor
SY100S815 MICREL-SY100S815 Datasheet
67Kb / 4P
   SINGLE SUPPLY QUAD PECL/TTL-TO-PECL
More results


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