D142 데이터 시트보기 (PDF) - Semtech Corporation

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D142

Per Pin timing Deskew w 4x2 Cross Point Switch

Semtech Corporation 

Edge142

EDGE HIGH-PERFORMANCE PRODUCTS

Circuit Description

Chip Overview

The Edge142 is a 4 X 2 cross point switch and deskew

element, offering an 1.5 ns delay (Tspan), where the

VDELAY inputs adjust the overall propagation delay of

the part. In addition, the part supports a separate falling

edge delay of 300 ps (Tfall), where the VFALL inputs

control the falling edge delay.

Two additional outputs, which are selectable from either

OUT0 or OUT1, are provided. These outputs are useful

when attempting to fanout a selected input to multiple

destination without using and external buffer. All output

signals may be enabled or disabled.

The Edge142 is designed to be monotonic and very

stable. Figure 1 shows a simplified block diagram.

IN0 / 0*

IN1 / 1*

IN2 / 2*

IN3 / 3*

S01 S00 VFALL0 VMID0 VDELAY0

MUX0 SEL EN* MUX EN

0

1

∆T

∆T

2

0

3

1

1

3

0

2

∆T

∆T

1

0

S11 S10 VFALL1 VMID1 VDELAY1

MUX1 SEL

 2000 Semtech Corp.

Figure 1. Edge142 Block Diagram

4

OUT0 / 0*

MUX OUT0 / 0*

MUX OUT1 / 1*

OUT1 / 1*

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