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MC100EL90 데이터시트(PDF) 1 Page - ON Semiconductor |
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MC100EL90 데이터시트(HTML) 1 Page - ON Semiconductor |
1 / 4 page MOTOROLA SEMICONDUCTOR TECHNICAL DATA 4–1 REV 1 © Motorola, Inc. 1996 7/95 Triple ECL to PECL Translator The MC100LVEL/EL90 is a triple ECL to PECL translator. The device receives either standard or low voltage differential ECL signals and translates them to either standard or low voltage differential PECL output signals. The LVEL device can handle the low voltage signals while the EL device is designed for the standard signals. It is possible to have low voltage signals on one side and standard signals on the other if the LVEL90 is used. • 500ps Propagation Delays • Fully Differential Design • Supports both Standard and Low Voltage Operation • 20–Lead SOIC Packaging A VBB output is provided for interfacing with single ended ECL signals at the input. If a single ended input is to be used the VBB output should be connected to the D input. The active signal would then drive the D input. When used the VBB output should be bypassed to ground via a 0.01µF capacitor. The VBB output is designed to act as the switching reference for the EL90 under single ended input switching conditions, as a result this pin can only source/sink up to 0.5mA of current. To accomplish the level translation the EL/LVEL90 requires three power rails. The VCC supply should be connected to the positive supply, and the VEE pin should be connected to the negative power supply. The GND pins as expected are connected to the system ground plain. Both VEE and VCC should be bypassed to ground via 0.01µF capacitors. Under open input conditions, the D input will be biased at VEE/2 and the D input will be pulled to VEE. This condition will force the Q output to a LOW, ensuring stability. D2 D1 Logic Diagram and Pinout: 20-Lead SOIC (Top View) D1 17 18 16 15 14 13 12 4 3 5 6 7 8 9 Q0 11 10 Q1 Q1 Q2 Q2 VCC D0 19 20 2 1 VCC Q0 D0 D2 VCC VEE GND VBB GND VBB ECL PECL ECL PECL ECL PECL MC100LVEL90 MC100EL90 DW SUFFIX PLASTIC SOIC PACKAGE CASE 751D-04 1 20 PIN NAMES Function ECL Inputs PECL Outputs ECL Reference Voltage Output Pins Dn Qn VBB |
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