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MC100LVEL38DW Datenblatt(PDF) 1 Page - ON Semiconductor |
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MC100LVEL38DW Datenblatt(HTML) 1 Page - ON Semiconductor |
1 / 7 page © Semiconductor Components Industries, LLC, 2006 November, 2006 − Rev. 8 1 Publication Order Number: MC100LVEL38/D MC100LVEL38 3.3VECL ÷2, ÷4/6 Clock Generation Chip Description The MC100LVEL38 is a low skew ÷2, ÷4/6 clock generation chip designed explicitly for low skew clock generation applications. The internal dividers are synchronous to each other, therefore, the common output edges are all precisely aligned. The device can be driven by either a differential or single-ended input signal. The common enable (EN) is synchronous so that the internal dividers will only be enabled/disabled when the internal clock is already in the LOW state. This avoids any chance of generating a runt clock pulse on the internal clock when the device is enabled/disabled as can happen with an asynchronous control. An internal runt pulse could lead to losing synchronization between the internal divider stages. The internal enable flip-flop is clocked on the falling edge of the input clock, therefore, all associated specification limits are referenced to the negative edge of the clock input. The Phase_Out output will go HIGH for one clock cycle whenever the ÷2 and the ÷4/6 outputs are both transitioning from a LOW to a HIGH. This output allows for clock synchronization within the system. Upon startup, the internal flip-flops will attain a random state; therefore, for systems which utilize multiple LVEL38s, the master reset (MR) input must be asserted to ensure synchronization. For systems which only use one LVEL38, the MR pin need not be exercised as the internal divider design ensures synchronization between the ÷2 and the ÷4/6 outputs of a single device. 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 • 50 ps Maximum Output-to-Output Skew • Synchronous Enable/Disable • Master Reset for Synchronization • ESD Protection: >2 kV Human Body Model • 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 75 kW Pulldown Resistors • Meets or Exceeds JEDEC Spec EIA/JESD78 IC Latchup Test • Moisture Sensitivity Level 1 For Additional Information, see Application Note AND8003/D • Flammability Rating: UL 94 V−0 @ 0.125 in, Oxygen Index: 28 to 34 • Transistor Count = 388 devices • 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. http://onsemi.com See detailed ordering and shipping information in the package dimensions section on page 6 of this data sheet. ORDERING INFORMATION *For additional marking information, refer to Application Note AND8002/D. MARKING DIAGRAM* A = Assembly Location WL = Wafer Lot YY = Year WW = Work Week G= Pb−Free Package SO−20 WB DW SUFFIX CASE 751D 20 1 100LVEL38 AWLYYWWG |
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