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부품번호 | E142AHF 기능 |
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기능 | Per Pin timing Deskew w 4x2 Cross Point Switch | ||
제조업체 | Semtech Corporation | ||
로고 | |||
전체 19 페이지수
EDGE HIGH-PERFORMANCE PRODUCTS
Description
Edge142
Per Pin timing Deskew w 4x2
Cross Point Switch
Features
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.
• 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
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.
Applications
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.
• 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*
IN1 / 1*
IN2 / 2*
IN3 / 3*
4X2
∆T
∆T
OUT0 / 0*
MUX OUT0 / 0*
MUX OUT1 / 1*
OUT1 / 1*
Revision 1, February 14, 2000
VFALL 1
VDELAY 1
1
www.semtech.com
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*
www.semtech.com
4페이지 EDGE HIGH-PERFORMANCE PRODUCTS
Circuit Description (continued)
Edge142
Edge142 Tpd+ Span vs. VDELAY; VFALL and VMID=-0.6V
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0.1
0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 -0.8 -0.9 - 1 -1.1 -1.2 -1.3
VDELAY [V]
Figure 4. VDELAY Tranfer Function
Edge142 Tpd- Span vs. VFALL; VDELAY and VMID=-0.5V
200
150
100
50
0
-50
-100
-150
-200
0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 -0.8 -0.9 - 1 -1.1 -1.2 -1.3
VDELAY [V]
Figure 5. VFALL Transfer Function
2000 Semtech Corp.
7 www.semtech.com
7페이지 | |||
구 성 | 총 19 페이지수 | ||
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부품번호 | 상세설명 및 기능 | 제조사 |
E142AHF | Per Pin timing Deskew w 4x2 Cross Point Switch | Semtech Corporation |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |