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參數(shù)資料
| 型號： | MC100EP221TB |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 時鐘及定時 |
| 英文描述： | 100E SERIES, LOW SKEW CLOCK DRIVER, 20 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQFP52 |
| 封裝： | PLASTIC, LQFP-52 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大小： | 308K |
| 代理商： | MC100EP221TB |
6
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Order this document
by MC100EP221/D
MOTOROLA ADVANCED CLOCK DRIVERS DEVICE DATA
639
Low-Voltage 1:20 Differential
ECL/PECL Clock Driver
The MC100EP221 is a low skew 1–to–20 differential driver, designed
with clock distribution in mind. It accepts two clock sources into an input
multiplexer. The input signals can be either differential or single–ended if
the VBB output is used. The selected signal is fanned out to 20 identical
differential outputs.
270ps max. Part–to–Part Skew
50ps max. Output–to–Output Skew
Differential Design
VBB Output
Voltage and Temperature Compensated Outputs
Supports 3.3V and 2.5V, ECL and PECL Operation
Supports HSTL and PECL Clock Systems
The EP221 is specifically designed, modeled and produced with low
skew as the key goal. Optimal design and layout serve to minimize gate–
to–gate skew within a device, and empirical modeling is used to deter-
mine process control limits that ensure consistent tpd distributions from lot
to lot. The net result is a dependable, guaranteed low skew device.
To ensure that the tight skew specification is met it is necessary that
both sides of the differential output are terminated into 50
, even if only
one side is being used. In most applications, all ten differential pairs will
be used and therefore terminated. In the case where fewer than ten pairs
are used, it is necessary to terminate at least the output pairs on the same
package side as the pair(s) being used on that side, in order to maintain
minimum skew. Failure to do this will result in small degradations of prop-
agation delay (on the order of 10–20ps) of the output(s) being used
which, while not being catastrophic to most designs, will mean a loss of
skew margin.
The MC100EP221, as with most other ECL devices, can be operated from a positive VCC supply in PECL mode. This allows
the EP221 to be used for high performance clock distribution in +3.3V or +2.5V systems. Designers can take advantage of the
EP221’s performance to distribute low skew clocks across the backplane. In a PECL environment, series or Thevenin line
terminations are typically used as they require no additional power supplies.
Rev 1
MC100EP221
LOW–VOLTAGE
1:20 DIFFERENTIAL
ECL/PECL CLOCK DRIVER
TB SUFFIX
52–LEAD LQFP PACKAGE
EXPOSED PAD
CASE 1336
See Upgrade Product – MC100ES6221
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC100EP223 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Low-Voltage 1:22 Differential PECL/HSTL Clock Driver |
| MC100EP223TC | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Low-Voltage 1:22 Differential PECL/HSTL Clock Driver |
| MC100EP24D | 制造商:ON Semiconductor 功能描述: |
| MC100EP29 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:3.3V / 5V ECL Dual Differential Data and Clock D Flip−Flop With Set and Reset |
| MC100EP29DT | 功能描述:觸發(fā)器 3.3V/5V ECL Dual RoHS:否 制造商:Texas Instruments 電路數(shù)量:2 邏輯系列:SN74 邏輯類型:D-Type Flip-Flop 極性:Inverting, Non-Inverting 輸入類型:CMOS 輸出類型: 傳播延遲時間:4.4 ns 高電平輸出電流:- 16 mA 低電平輸出電流:16 mA 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:X2SON-8 封裝:Reel |
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