AD53020

a FEATURES Four Delay Lines with the Ability to Independently Adjust All Edges Pin Compatible and Functionally Equivalent with the BT624 Reduced Power Dissipation 44-Lead PLCC Package with Internal Heat Spreader APPLICATIONS Automatic Test Equipment Semiconductor Test Systems Board Test Systems Clocked ECL Circuits Four Channel ECL Delay Line AD53020 FUNCTIONAL BLOCK DIAGRAM GND S0 S1 VWIDTH1 OUT1 OUT1 VDELAY1 VWIDTH2 IN2, IN2 OUT2 OUT2 DRVMODE VDELAY2 VWIDTH3 IN3, IN3 OUT3 OUT3 AD53020 IN1, IN1 PRODUCT DESCRIPTION The AD53020 is a four-channel delay line designed for use in automatic test equipment and digital logic systems. High speed bipolar transistors and a 44-lead plastic PLCC package with internal heat spreader provide high frequency performance at a minimum of space, cost and power dissipation. Featuring full pin compatibility and functional equivalence to the BT624, the AD53020 offers independent analog control of positive and negative edges with five delay ranges. The AD53020 offers attractive performance with optimized power dissipation and linear delay vs. program voltage control. This device is also very stable over operating conditions and has very low jitter. Digital inputs are ECL compatible. They can either be provided independently for each channel (IN1, IN1 through IN4, IN4 ), or fanned out to all channels from Channel 2 (IN2, IN2). The choice of these two options is made by setting the DRVMODE input, with ECL Logic 0 providing four independent channels...