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參數(shù)資料
| 型號(hào)： | MC10H641FN |
| 廠商： | MOTOROLA INC |
| 元件分類(lèi)： | 時(shí)鐘及定時(shí) |
| 英文描述： | SINGLE SUPPLY PECL-TTL 1:9 CLOCK DISTRIBUTION CHIP |
| 中文描述： | 10H SERIES, LOW SKEW CLOCK DRIVER, 9 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQCC28 |
| 封裝： | PLASTIC, LCC-28 |
| 文件頁(yè)數(shù)： | 6/8頁(yè) |
| 文件大?。?/td> | 115K |
| 代理商： | MC10H641FN |
MC10H641 MC100H641
MOTOROLA
MECL Data
DL122 — Rev 6
2–6
Using the thermal resistance graph of Figure 2 yields a
thermal resistance of 41
°
C/W which yields a junction
temperature of 71
°
C with a range of 56
°
C to 86
°
C. Using the
TPD versus Temperature curve of Figure 3 yields a
propagation delay of 5.42ns and a variation of 0.19ns.
Since the design will not experience the full
±
5% VCC
variation of the data sheet the 1ns window provided will be
unnecessarily conservative. Using the curve of Figure 4
shows a delay variation due to a
±
3% VCC variation of
±
0.075ns. Therefore the 1ns window can be reduced to
1ns – (0.27ns – 0.15ns) = 0.88ns. Since H641a and H641b
are on the same board we will assume that they will always be
at the same VCC; therefore the propagation delay window will
only be 1ns – 0.27ns = 0.73ns.
Putting all of this information together leads to a skew
between all devices of
0.19ns + 0.88ns
(temperature + supply, and inherent device),
while the skew between devices A and B will be only
0.19ns + 0.73ns
(temperature + inherent device only).
In both cases, the propagation delays will be centered
around 5.42ns, resulting in the following tPLH windows:
TPLH = 4.92ns – 5.99ns; 1.07ns window
(all devices)
TPLH = 5.00ns – 5.92ns; 0.92ns window
(devices a & b)
Of course the output–to–output skew will be as shown in
the data sheet since all outputs are equally loaded.
This process may seem cumbersome, however the delay
windows, and thus skew, obtained are significantly better than
the conservative worst case limits provided at the beginning
of this note. For very high performance designs, this extra
information and effort can mean the difference between going
ahead with prototypes or spending valuable engineering time
searching for alternative approaches.
Q0
Q8
TTL
ECL
H641a
Q0
Q8
TTL
ECL
H641b
Q0
Q8
TTL
ECL
H641c
Card 1
Card 2
B
Figure 6. Example Application
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC10H641FNG | 功能描述:轉(zhuǎn)換 - 電壓電平 5V PECL to TTL 1:9 Clock Driver RoHS:否 制造商:Micrel 類(lèi)型:CML/LVDS/LVPECL to LVCMOS/LVTTL 傳播延遲時(shí)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(fēng)格:SMD/SMT 封裝 / 箱體:MLF-8 |
| MC10H641FNR2 | 功能描述:轉(zhuǎn)換 - 電壓電平 5V PECL to TTL 1:9 RoHS:否 制造商:Micrel 類(lèi)型:CML/LVDS/LVPECL to LVCMOS/LVTTL 傳播延遲時(shí)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(fēng)格:SMD/SMT 封裝 / 箱體:MLF-8 |
| MC10H641FNR2G | 功能描述:轉(zhuǎn)換 - 電壓電平 5V PECL to TTL 1:9 Clock Driver RoHS:否 制造商:Micrel 類(lèi)型:CML/LVDS/LVPECL to LVCMOS/LVTTL 傳播延遲時(shí)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(fēng)格:SMD/SMT 封裝 / 箱體:MLF-8 |
| MC10H642 C57M WAF | 制造商:ON Semiconductor 功能描述: |
| MC10H642FN | 功能描述:時(shí)鐘驅(qū)動(dòng)器及分配 ECL/TTL Clock Driver RoHS:否 制造商:Micrel 乘法/除法因子:1:4 輸出類(lèi)型:Differential 最大輸出頻率:4.2 GHz 電源電壓-最大: 電源電壓-最小:5 V 最大工作溫度:+ 85 C 封裝 / 箱體:SOIC-8 封裝:Reel |
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