SY100EL90V Datasheet | Micrel Semiconductor

Micrel, Inc. 5V/3.3V TRIPLE ECL/LVECL-TOPECL/LVPECL TRANSLATOR Features s 3.3V and 5V power supply options s 500ps propagation delay s Fully differential design s Supports both standard and low voltage operation s Available in 20-pin SOIC package DESCRIPTION The SY100EL90V is a triple ECL/LVECL-to-PECL/ LVPECL translator. The device can translate over all binations of supply voltages: -5V ECL to 5V PECL, -5V ECL to 3.3V LVPECL, -3.3V LVECL to 5V PECL or -3.3V LVECL to 3.3V LVPECL. 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 via a 0.01µF capacitor. The VBB output is designed to act as the switching reference for the EL90V under single ended input switching conditions. As a result this pin can only source/sink up to 0.5m A of current. To acplish the level translation the EL90V 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 plane. Both VEE and VCC should be bypassed to ground via 0.01µF capacitors. Under open input conditions, the D input will be biased at VCC/2 and the D input will be pulled to VEE. This condition will force the Q output to a LOW, ensuring stability. FUNCTION TABLE Function - 5V ECL to 5V PECL - 5V ECL to 3.3V LVPECL - 3.3V LVECL to 5V PECL - 3.3V LVECL to 3.3V LVPECL VCC 5V 3.3V 5V 3.3V GND 0V 0V 0V 0V - 5V - 5V - 3.3V - 3.3V PIN NAMES Pin Dn Qn VBB Function ECL/LVECL Inputs PECL/LVPECL Outputs ECL/LVECL Reference Voltage Output M9999-031306 hbwhelp@micrel. or (408) 955-1690 Rev.: I Amendment: /0 Isse Date: March 2006 Micrel, Inc. PACKAGE/ORDERING INFORMATION VCC 1 D0 2 D0...