E118AHF Datasheet PDF - Semtech Corporation

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E118AHF
Semtech Corporation

Part Number E118AHF
Description Low Skew Clock Spreader
Page 11 Pages


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EDGE HIGH-PERFORMANCE PRODUCTS
Description
Features
Edge118
Low Skew
Clock Spreader
The Edge118 is a fully differential 1:18 clock spreader.
Manufactured in a high performance bipolar process,
the Edge118 is designed to accurately fan out a multitude
of clock signals with low channel to channel skew.
• Low Timing Error vs. Duty Cycle & Frequency
• Low Channel to Channel Skew
• Small Footprint (64 MQFP Package,
14 mm X 14 mm Body)
Functional Block Diagram
IN / IN*
Revision 1/August 15, 2000
OUT / OUT* 0
OUT / OUT* 1
OUT / OUT* 2
OUT / OUT* 3
OUT / OUT* 4
OUT / OUT* 5
OUT / OUT* 6
OUT / OUT* 7
OUT / OUT* 8
OUT / OUT* 9
OUT / OUT* 10
OUT / OUT* 11
OUT / OUT* 12
OUT / OUT* 13
OUT / OUT* 14
OUT / OUT* 15
OUT / OUT* 16
OUT / OUT* 17
Applications
• Test Equipment
1
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EDGE HIGH-PERFORMANCE PRODUCTS
PIN Description
Pin Name
IN, IN*
OUT0, OUT0*
OUT1, OUT1*
OUT2, OUT2*
OUT3, OUT3*
OUT4, OUT4*
OUT5, OUT5*
OUT6, OUT6*
OUT7, OUT7*
OUT8, OUT8*
OUT9, OUT9*
OUT10, OUT10*
OUT11, OUT11*
OUT12, OUT12*
OUT13, OUT13*
OUT14, OUT14*
OUT15, OUT15*
OUT16, OUT16*
OUT17, OUT17*
Power Supplies
GND
Pin #
6, 8
1, 3
63, 61
58, 60
57, 55
52, 54
51, 49
45, 47
44, 42
39, 41
38, 36
33, 35
31, 29
26, 28
25, 23
20, 22
19, 17
13, 15
12, 10
Description
Differential input signal.
Differential ECL output signals.
2, 7, 11, 14, 18, 21,
24, 27, 30, 34, 37,
40, 43, 46, 50, 53,
56, 59, 62
Positive Power Supply
VEE 9, 16, 32, 48, 64 Negative Power Supply
TDP, TDN
4, 5 Thermal Diode Connections
Edge118
2000 Semtech Corp.
2
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EDGE HIGH-PERFORMANCE PRODUCTS
PIN Description (continued)
Edge118
OUT0
GND
OUT0*
TDP
TDN
IN
GND
IN*
VEE
OUT17*
GND
OUT17
OUT16
GND
OUT16*
VEE
64
1
17
49
33
VEE
OUT6*
GND
OUT6
OUT7
GND
OUT7*
OUT8*
GND
OUT8
OUT9
GND
OUT9*
OUT10*
GND
OUT10
2000 Semtech Corp.
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EDGE HIGH-PERFORMANCE PRODUCTS
Circuit Description
Chip Overview
The Edge118 is a clock distribution chip designed to
take one input signal (IN / IN*) and fan it out 18 times
to identical outputs (OUT / OUT*). The chip is designed
to minimize channel to channel skew and any timing jitter.
The parts wide fanout is extremely useful in applications
where many distinct copies of a signal are required on
one PC Board, and these signals must all be aligned.
This signal can be distributed without creating a
distribution tree using multiple devices.
Inputs
The input signal is differential, requiring 250 mV swings
for full performance operation. The inputs are ECL
compatible, but may also be operated over a common
mode voltage range between VEE + 1.3V and VCC .5V.
Outputs
The outputs are ECL compatible differential signals with
800 mV voltage swings centered around 1.3V below GND.
IN
IN*
Operating Frequency
The Edge118 is designed to maintain full performance
up to at least 1000 MHz and pass 500 ps pulses.
2000 Semtech Corp.
4
Edge118
OUT 0
OUT 0*
OUT 1
OUT 1*
OUT 2
OUT 2*
OUT 3
OUT 3*
OUT 4
OUT 4*
OUT 5
OUT 5*
OUT 6
OUT 6*
OUT 7
OUT 7*
OUT 8
OUT 8*
OUT 9
OUT 9*
OUT 10
OUT 10*
OUT 11
OUT 11*
OUT 12
OUT 12*
OUT 13
OUT 13*
OUT 14
OUT 14*
OUT 15
OUT 15*
OUT 16
OUT 16*
OUT 17
OUT 17*
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