E142AHF Datasheet PDF - Semtech Corporation

www.Datasheet-PDF.com

E142AHF
Semtech Corporation

Part Number E142AHF
Description Per Pin timing Deskew w 4x2 Cross Point Switch
Page 19 Pages


E142AHF datasheet pdf
Download PDF
E142AHF pdf
View PDF for Mobile

No Preview Available !

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



No Preview Available !

Edge142
EDGE HIGH-PERFORMANCE PRODUCTS
PIN Description
Pin Name
Digital
IN0, IN0*
IN1, IN1*
IN2, IN2*
IN3, IN3*
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
REXT2
COMP1,
COMP2
TDP, TDN
Power
GND
VEE
Pin #
Description
41, 42
44, 45
48, 47
51, 50
26, 25
14, 15
23, 22
17, 18
32, 31
8, 9
30
10
29
11
The multiplexer input signals. (Differential digital inputs.)
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
4
35
5
21, 19
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.
Positive and negative terminals to the thermal diode string.
6, 12, 13, 16,
24, 27, 28, 34,
40, 43, 49, 52
Device ground (positive device supply).
7, 20, 33, 46
2000 Semtech Corp.
2
www.semtech.com



No Preview Available !

EDGE HIGH-PERFORMANCE PRODUCTS
PIN Description (continued)
Edge142
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
26 OUT0
25 OUT0*
24 GND
23 MUX OUT0
22 MUX PUT0*
21 TDP
20 VEE
19 TDN
18 MUX OUT1*
17 MUX OUT1
16 GND
15 OUT1*
14 OUT1
52-Pin MQFP 10mm x 10mm
with Internal Heat Spreader
2000 Semtech Corp.
3 www.semtech.com



No Preview Available !

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



E142AHF datasheet pdf
Download PDF
E142AHF pdf
View PDF for Mobile


Related : Start with E142AH Part Numbers by
E142AHF Per Pin timing Deskew w 4x2 Cross Point Switch E142AHF
Semtech Corporation
E142AHF pdf

Index :   0   1   2   3   4   5   6   7   8   9   A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z   

This is a individually operated, non profit site. If this site is good enough to show, please introduce this site to others.
Since 2010   ::   HOME   ::   Contact