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MC100LVE210 数据表(PDF) 1 Page - ON Semiconductor |
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MC100LVE210 数据表(HTML) 1 Page - ON Semiconductor |
1 / 8 page © Semiconductor Components Industries, LLC, 2006 December, 2006 − Rev. 7 1 Publication Order Number: MC100LVE210/D MC100LVE210 3.3VECL Dual 1:4, 1:5 Differential Fanout Buffer Description The MC100LVE210 is a low voltage, low skew dual differential ECL fanout buffer designed with clock distribution in mind. The device features two fanout buffers, a 1:4 and a 1:5 buffer, on a single chip. The device features fully differential clock paths to minimize both device and system skew. The dual buffer allows for the fanout of two signals through a single chip, thus reducing the skew between the two fundamental signals from a part−to−part skew down to an output−to−output skew. This capability reduces the skew by a factor of 4 as compared to using two LVE111’s to accomplish the same task. To ensure that the tight skew specification is met it is necessary that both sides of the differential output are identically terminated, even if only one side is being used. In most applications all nine differential pairs will be used and therefore terminated. In the case where fewer than nine pairs are used it is necessary to terminate at least the output pairs adjacent to the output pair being used in order to maintain minimum skew. Failure to follow this guideline will result in small degradations of propagation delay (on the order of 10−20 ps) of the outputs being used, while not catastrophic to most designs this will result in an increase in skew. Note that the package corners isolate outputs from one another such that the guideline expressed above holds only for outputs on the same side of the package. The MC100LVE210, as with most ECL devices, can be operated from a positive VCC supply in PECL mode. This allows the LVE210 to be used for high performance clock distribution in +3.3 V systems. Designers can take advantage of the LVE210’s performance to distribute low skew clocks across the backplane or the board. In a PECL environment series or Thevenin line terminations are typically used as they require no additional power supplies, if parallel termination is desired a terminating voltage of VCC − 2.0 V will need to be provided. For more information on using PECL, designers should refer to Application Note AN1406/D. The VBB pin, an internally generated voltage supply, is available to this device only. For single-ended input conditions, the unused differential input is connected to VBB as a switching reference voltage. VBB may also rebias AC coupled inputs. When used, decouple VBB and VCC via a 0.01 mF capacitor and limit current sourcing or sinking to 0.5 mA. When not used, VBB should be left open. Features • 200 ps Part−to−Part Skew • 50 ps Typical Output−to−Output Skew • The 100 Series Contains Temperature Compensation • PECL Mode Operating Range: VCC = 3.0 V to 3.8 V with VEE = 0 V • NECL Mode Operating Range: VCC = 0 V with VEE = −3.0 V to −3.8 V • Internal Input Pulldown Resistors • Q Output will Default LOW with Inputs Open or at VEE • Pb−Free Packages are Available* *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. PLCC−28 FN SUFFIX CASE 776 MARKING DIAGRAM* *For additional marking information, refer to Application Note AND8002/D. A = Assembly Location WL = Wafer Lot YY = Year WW = Work Week G = Pb−Free Package MC100LVE210G AWLYYWW 128 http://onsemi.com See detailed ordering and shipping information in the package dimensions section on page 6 of this data sheet. ORDERING INFORMATION |
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类似说明 - MC100LVE210 |
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