
HIGH-PERFORMANCE PRODUCTS – ATE
1
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Edge728
Very High-Speed Dual- and
Quad-Channel ECL Delay Lines
Description
Features
Functional Block Diagram
Applications
Revision 3 / February 18, 2002
The Edge728 is a quad delay and deskew element.
Manufactured in a high performance bipolar process, it is
designed primarily for channel deskew applications in
Memory Test Equipment.
The part offers a full scale delay range of
≥ 8.0 ns with
independent
± 750 ps adjustment of the falling edge.
The Edge728 has a drive mode, where one input signal
is routed to all of the outputs. This mode is particularly
useful in a fanout application.
The delay value (and resolution) is controlled via an external
voltage DAC.
This deskew element is designed specifically to be
monotonic and stable while delaying a very narrow pulse
over a wide delay range.
The Edge728 is a pin and functionally compatible upgrade
to the Edge628 with the following differences:
greater net usable delay range
greater net usable falling edge
adjustment range
only one external bias resistor required
only one external compensation capacitor required
Pin and Functionally Compatible with the Edge 628
and Edge624 in Modes 0 and 2
Independent Delay Adjustments for Positive and
Negative Transitions
Fanout Mode for One Input Distributed to All
Channels
44-pin MQFP Package with Internal Heat Spreader,
44-pin PLCC with Internal Heat Spreader, or
Die Form
Automatic Test Equipment
Memory Tester Drive On Channel Deskew
OUT1
OUT1*
VDELAY1
VWIDTH1
IN1
IN1*
OUT2
OUT2*
VDELAY2
VWIDTH2
IN2
IN2*
OUT3
OUT3*
VDELAY3
VWIDTH3
IN3
IN3*
OUT4
OUT4*
VDELAY4
VWIDTH4
IN4
IN4*
DRVMODE
S1