Maker : Semtech Corporation
Part No. : E142AHF

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Product Information

Edge142 Per Pin timing Deskew w 4x2 Cross Point Switch EDGE HIGH-PERFORMANCE PRODUCTS Description The Edge142 is a 4 X 2 cross point switch with output edge deskew capability. Manufactured in a high performance bipolar process, it is designed primarily for channel deskew applications in VLSI and Mixed-Signal test equipment. Any of the four input signals may be selected as the source for either output. The 142 performs test head multiplexing, adjacent channel multiplexing, and signal buffering for both the drive and receive signals, in addition to timing deskew. The delay value (and resolution) is controlled via an external voltage DAC. The delay element is designed specifically to be monotonic and very stable while delaying a very narrow pulse over a limited delay range. The part offers separate delays for rising vs. falling edges. The rising edge delay range is 1.5 ns and the falling edge adjustment range is 300 ps. The Edge142 is also well suited for 1:2 or 1:4 signal fanout applications that require: - multiple signal sources - output enable / disable - timing deskew on the output signals. Features • Very Narrow (<1 ns) Pulse Width Capability • Fmax > 850 MHz • Independent Delay Adjustments for Positive and Negative Transitions • Delay Range of 1.5 ns • Trailing Edge Adjust Range of 300 ps • Small Footprint: 52-pin MQFP Package (10 X 10 mm) with Internal Heat Spreader or Die Form Applications • Automatic Test Equipment – Per pin deskew in VLSI, Mixed-Signal, and Memory Testers – Clock Distribution with timing adjustment Functional Block Diagram VDELAY 0 VFALL 0 IN0 / 0* ∆T OUT0 / 0* IN1 / 1* 4X2 IN2 / 2* ∆T 2X2 MUX OUT0 / 0* MUX OUT1 / 1* IN3 / 3* OUT1 / 1* VFALL 1 VDELAY 1 Revision 1, February 14, 2000 1 www.semtech.com Edge142 EDGE HIGH-PERFORMANCE PRODUCTS PIN Description Pin Name Digital IN0, IN1, IN2, IN3, IN0* IN1* IN2* IN3* 41, 44, 48, 51, 42 45 47 50 The multiplexer input signals. (Differential digital inputs.) Pin # Description OUT0, OUT* OUT1, OUT1* MUX OUT0, 0* MUX OUT1, 1* S00, S01 S10, S11 MUX0 SEL MUX1 SEL EN* MUX EN Analog VDELAY0 VDELAY1 VFALL0 VFALL1 VMID0 VMID1 REXT1 26, 25 14, 15 23, 22 17, 18 32, 31 8, 9 30 10 29 11 The selected and delayed output signals. (Differential ECL compatible outputs.) Selected monitor outputs. (Differential ECL compatible levels.) Single-ended 10KH ECL compatible inputs which select the channel 0 and channel 1 source. Single-ended 10KH ECL compatible inputs which select the two output monitor sources. Single-ended 10KH ECL compatible input which enables the delayed outputs. Single-ended 10KH ECL compatible input which enables the monitor outputs. 39 1 37 3 38 2 36 Analog voltage inputs which control the amount of propagation delay for each channel. Analog voltage inputs which control the amount of falling edge delay for each channel. Analog voltage inputs which control the amount of pulse width compensation for each channel. Analog input current used to establish the bias current for the VDELAY, VFALL, and VMIDinputs. Analog input current used to establish the bias level for the delay cells. Op Amp compensation capacitors. REXT2 COMP1, COMP2 TDP, TDN Power GND 4 35 5 21, 19 Positive and negative terminals to the thermal diode string. 6, 12, 13, 16, 24, 27, 28, 34, 40, 43, 49, 52 7, 20, 33, 46 Device ground (positive device supply). VEE  2000 Semtech Corp. 2 www.semtech.com Edge142 EDGE HIGH-PERFORMANCE PRODUCTS PIN Description (continued) MUX0 SEL VDELAY0 VFALL0 COMP1 REXT1 VMID0 GND GND 28 39 38 37 26 35 34 33 32 31 30 29 GND IN0 IN0* GND IN1 IN1* VEE IN2* IN2 GND IN3* IN3 GND 40 41 42 43 44 45 46 47 48 49 50 51 52 10 12 13 11 1 2 3 4 5 6 7 8 9 27 GND VEE S00 S01 EN* 26 25 24 23 22 21 20 19 18 17 16 15 14 OUT0 OUT0* GND MUX OUT0 MUX PUT0* TDP VEE TDN MUX OUT1* MUX OUT1 GND OUT1* OUT1 MUX1 SEL VDELAY1 VFALL1 MUX EN VMID1 REXT2 COMP2 VEE GND S11 GND 52-Pin MQFP 10mm x 10mm with Inter...

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