®
EQCO125X40 Family
12.5 Gbps Asymmetric Equalizer/Driver/Repeater Product Brief
Features
is received by an auto-adaptive equalizer that compensates for higher-frequency losses in the preceding
channel. A reference-less Clock-Data Recovery (CDR)
subsequently self-adapts to the incoming bit-rate and
resets the jitter back to a low value for maintaining signal integrity. A cable driver launches this clean signal
back onto a cable or PCB trace pair. When placed in
series as a repeater, a signal can travel through several
EQCO125X40 Family devices to the destination. The
EQCO125X40 CDR restores signal integrity at each
link along the way.
• Equalizer for up to 40 m of coaxial cable at
12.5 Gbps or 130 m at 1.25 Gbps over a single
Belden 1694A coax cable
• Same chip used at Device (Camera) and Host
(Frame Grabber) for asymmetric full-duplex
communication
• Lower Cost version EQCO125T40 for Device
(Camera) side only
• Cable types supported are 75 coax, 50 coax,
and 100 STP (Shielded Twisted Pair)
• Simultaneous signaling over a single cable:
Up to 12.5 Gbps downlink
21 or 42 Mbps uplink
Power over Coax
• Can also be used as a stand-alone cable repeater
with simultaneous power, downlink and uplink
over a single cable
• Integrated termination resistors for differential
signaling
• CDR (Clock-Data Recovery) restores signal
integrity in both directions
• Both Uplink and Downlink include equalizer, CDR
and Cable driver (see Figure 1-2)
• Reference-clock free operation (no crystal or
clock needed)
• Low power consumption / single supply @ 1.25 V
• 16-pin, 0.65 mm pin pitch, 4 mm QFN package
• Small PCB footprint for EQCO125X40 Family with
few off-chip components
• Industrial temperature range
• Pb-free and RoHS compliant
The high-speed direction (or downlink) has a simultaneous
complementary
uplink,
operating
at
20.833 Mbps or 41.666 Mbps 8b/10b coded signaling.
This uplink also includes an equalizer, a reference-less
CDR and a cable driver, operating with a transparent
full-duplex and self-adaptive downlink.
The EQCO125X40 Family can be used as a CoaXPress transmitter inside a camera, as a CoaXPress
receiver inside a frame grabber and as a CoaXPress
repeater inside an active coax cable or link. It can also
be used as a generic high-speed signaling transport for
any 8b/10b application. In general it can be regarded as
an ideal means for using the high bit-rate ports on an
FPGA in real-world applications. This allows the highspeed signal to get an increase in signal integrity along
its signaling path at strategic places: e.g. when changing the signaling nature from single-ended to differential or vice-versa, after long runs of cable, or recovering
the signal from skin effect and/or dielectric losses. The
CDR resets accumulated jitter due to small impedance
mismatches, non-ideal connectors, PCB-vias, etc., and
yields better signal integrity. This is also useful when
the signal chain includes an optical link.
Applications
• CoaXPress compliant systems, supports all
CoaXPress standards and speeds
• Links for high-definition Cameras
• Links between FPGAs
• High-speed capture cards over long cable lengths
• Machine Vision, Military, Aerospace, Medical,
Broadcast and Surveillance cameras, Intelligent
Traffic Systems
• When a single cable carrying power, video data
and camera control stream is needed
TYPICAL LINK PERFORMANCE
Typical maximum cable length
for Belden (m)
Bit-rate (Gbps) 1694A 4694R 4855R 4731R
General Description
The EQCO125X40 is a single chip (equalizer, driver,
reclocker) that repeats high-speed 8b/10b coded data
signals with a downstream bit-rate between 1.25 to
12.5 Gbps. From a cable or PCB trace pair, the signal
2020 Microchip Technology Inc.
1.25
130
137
75
210
2.5
110
118
64
180
3.125
100
108
60
160
5
65
70
40
105
6.25
55
60
33
90
10
40
45
24
65
12.5
40
45
24
65
DS60001589D - page 1
JULY 2020
EQCO125X40 Family
TO OUR VALUED CUSTOMERS
It is our intention to provide our valued customers with the best documentation possible to ensure successful use of
your Microchip products. To this end, we will continue to improve our publications to better suit your needs. Our publications will be refined and enhanced as new volumes and updates are introduced.
If you have any questions or comments regarding this publication, please contact the Marketing Communications
Department via E-mail at docerrors@microchip.com. We welcome your feedback.
Most Current Data Sheet
To obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at:
http://www.microchip.com
You can determine the version of a data sheet by examining its literature number found on the bottom outside corner
of any page. The last character of the literature number is the version number, (e.g., DS30000000A is version A of
document DS30000000).
Errata
An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may
exist for current devices. As device/documentation issues become known to us, we will publish an errata sheet. The
errata will specify the revision of silicon and revision of document to which it applies.
To determine if an errata sheet exists for a particular device, please check with one of the following:
• Microchip’s Worldwide Web site; http://www.microchip.com
• Your local Microchip sales office (see last page)
When contacting a sales office, please specify which device, revision of silicon and data sheet (include literature
number) you are using.
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Register on our web site at www.microchip.com to receive the most current information on all of our products.
page 2 - DS60001589D
2020 Microchip Technology Inc.
EQCO125X40 Family
1.0
BASIC APPLICATION INFORMATION
The EQCO125X40 repeater chip is designed to simultaneously transmit and receive signals on a single cable or PCB
trace pair. In one direction an 8b/10b coded downlink signal is transmitted between 1.25 Gbps and 12.5 Gbps. In the
opposite direction a lower speed 8b/10b coded uplink signal is transmitted at 20.833 Mbps or 41.666 Mbps. The
EQCO125X40 has an integrated high-speed equalizer, reclocker and cable driver. The uplink channel also has an integrated receiver, reclocker and driver. Figure 1-1 illustrates a typical EQCO125X40 link set-up.
The downlink signal is transmitted with 600 mV transmit amplitude. As this signal is attenuated by the coax (or STP)
over distance, it is recovered by the equalizer and reclocker. The low-speed uplink is transmitted with a lower amplitude
of 130 mV to limit the crosstalk with the downlink channel.
The downlink channel is intended for NRZ 8b/10b data with bit-rates between 1.25 Gbps and 12.5 Gbps. CoaXPress
standard speeds of CXP-1 (1.25 Gbps), CXP-2 (2.5 Gbps), CXP-3 (3.125 Gbps), CXP-5 (5 Gbps), CXP-6 (6.25 Gbps),
CXP-10 (10 Gbps) and CXP-12 (12.5 Gbps) are all supported as well as all generic 8b/10b applications.
The low-speed uplink is intended for NRZ 8b/10b data with bit-rates between 20 Mbps and 42 Mbps with a single-ended
1.25V LVTTL input and output. CoaXPress standard speeds of 20.833 Mbps and 41.666 Mbps are supported.
On top of the downlink channel and the low-speed uplink, the system allows power transmission over the coax by using
external inductors. These external inductors give the communication channel a high-pass characteristic. The uplink
receiver inside the EQCO125X40 chip recovers the signal lost by this high-pass filter. Appropriate inductors should be
selected for correct operation of the link. Operation has only been tested with the inductor combination used in Microchip’s reference design, even though other components might be suitable.
FIGURE 1-1:
TYPICAL EQCO125X40 LINK SET-UP
DC Power
DC Power
Up to
12.5 Gbps
downlink
High
Definition
Camera
®
®
EQCO
125X40
FIGURE 1-2:
Frame
Store +
Camera
Control
EQCO
125X40
Coax
21/42
Mbps
uplink
Up to
12.5 Gbps
downlink
TP2
TP3
21/42
Mbps
uplink
EQCO125X40 BLOCK DIAGRAM SHOWING ELECTRICAL CONNECTIONS
EQCO125X40
SDIp
SDIn
HF
Equalizer
+
HF
Cable
driver
HF
Reclocker
Noise
Gen.
LF
Cable
Driver
SDOp
SDOn
TSI
TXLF
RXLF
CLKLF
2020 Microchip Technology Inc.
LF
Output
Driver
LF
Reclocker
LF
Receiver
DS60001589D - page 3
EQCO125X40 Family
PACKAGING INFORMATION
16-Lead Plastic Quad Flat, No Lead Package (8E) - 4x4x0.9 mm Body [QFN]
16-Lead Plastic Quad Flat, No Lead Package (8E) - 4x4x0.9 mm Body [QFN]
Note:
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
D
A
B
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D
A
B
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NOTE 1
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(DATUM B)
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(DATUM
(DATUM
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2X
0.20
C
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0.20 C
2X
0.20 C
2X
TOP VIEW
TOP VIEW
0.20 C
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C
SEATINGC
PLANE
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PLANE
A1
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A1
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16X
SIDE VIEW
C A B SIDE VIEW
(A3)
(A3) 0.10
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D2
C A B
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16X
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(16X K)
(16X K)
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C A B
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1
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16X L
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N
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e
16X b
16X b 0.10
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C A B
CCA B
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BOTTOM
VIEW
0.05
C
Microchip Technology Drawing
BOTTOM VIEW
C04-259B Sheet 1 of 2
Microchip Technology Drawing C04-259B Sheet 1 of 2
page 4 - DS60001589D
2020 Microchip Technology Inc.
EQCO125X40 Family
16-Lead
16-LeadPlastic
PlasticQuad
QuadFlat,
Flat,No
NoLead
LeadPackage
Package(8E)
(8E)--4x4x0.9
4x4x0.9mm
mmBody
Body[QFN]
[QFN]
Note:
Note:
For
Forthe
themost
mostcurrent
currentpackage
packagedrawings,
drawings,please
pleasesee
seethe
theMicrochip
MicrochipPackaging
PackagingSpecification
Specificationlocated
locatedatat
http://www.microchip.com/packaging
http://www.microchip.com/packaging
Units
Units
Dimension
DimensionLimits
Limits
Number
NN
NumberofofPins
Pins
ee
Pitch
Pitch
Overall
AA
OverallHeight
Height
Standoff
A1
Standoff
A1
A3
Terminal
Thickness
A3
Terminal Thickness
Overall
EE
OverallWidth
Width
E2
Exposed
E2
ExposedPad
PadWidth
Width
Overall
DD
OverallLength
Length
D2
Exposed
D2
ExposedPad
PadLength
Length
Terminal
bb
TerminalWidth
Width
Terminal
LL
TerminalLength
Length
KK
Terminal-to-Exposed-Pad
Terminal-to-Exposed-Pad
MIN
MIN
0.80
0.80
0.00
0.00
1.95
1.95
1.95
1.95
0.25
0.25
0.45
0.45
MILLIMETERS
MILLIMETERS
NOM
NOM
16
16
0.65
0.65BSC
BSC
0.87
0.87
0.02
0.02
0.20
0.20REF
REF
4.00
4.00BSC
BSC
2.05
2.05
4.00
4.00BSC
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2.05
2.05
0.30
0.30
0.55
0.55
0.425
0.425REF
REF
MAX
MAX
0.95
0.95
0.05
0.05
2.15
2.15
2.15
2.15
0.35
0.35
0.65
0.65
Notes:
Notes:
1.1. Pin
Pin11visual
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3.3. Dimensioning
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REF:
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Microchip
MicrochipTechnology
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Drawing C04-259B
C04-259BSheet
Sheet22ofof22
2020 Microchip Technology Inc.
DS60001589D - page 5
EQCO125X40 Family
NOTES:
page 6 - DS60001589D
2020 Microchip Technology Inc.
EQCO125X40 Family
Note the following details of the code protection feature on Microchip devices:
•
Microchip products meet the specification contained in their particular Microchip Data Sheet.
•
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
•
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
•
Microchip is willing to work with the customer who is concerned about the integrity of their code.
•
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
WARRANTIES OF ANY KIND WHETHER EXPRESS OR
IMPLIED, WRITTEN OR ORAL, STATUTORY OR
OTHERWISE,
RELATED
TO
THE
INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
QUALITY,
PERFORMANCE, MERCHANTABILITY
OR
FITNESS FOR PURPOSE. Microchip disclaims all liability
arising from this information and its use. Use of Microchip
devices in life support and/or safety applications is entirely at the
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harmless Microchip from any and all damages, claims, suits, or
expenses resulting from such use. No licenses are conveyed,
implicitly or otherwise, under any Microchip intellectual property
rights unless otherwise stated.
Trademarks
The Microchip name and logo, the Microchip logo, Adaptec, AnyRate,
AVR, AVR logo, AVR Freaks, BesTime, BitCloud, chipKIT, chipKIT
logo, CryptoMemory, CryptoRF, dsPIC, FlashFlex, flexPWR, HELDO,
IGLOO, JukeBlox, KeeLoq, Kleer, LANCheck, LinkMD, maXStylus,
maXTouch, MediaLB, megaAVR, Microsemi, Microsemi logo, MOST,
MOST logo, MPLAB, OptoLyzer, PackeTime, PIC, picoPower,
PICSTART, PIC32 logo, PolarFire, Prochip Designer, QTouch, SAMBA, SenGenuity, SpyNIC, SST, SST Logo, SuperFlash,
Symmetricom, SyncServer, Tachyon, TempTrackr, TimeSource,
tinyAVR, UNI/O, Vectron, and XMEGA are registered trademarks of
Microchip Technology Incorporated in the U.S.A. and other countries.
APT, ClockWorks, The Embedded Control Solutions Company,
EtherSynch, FlashTec, Hyper Speed Control, HyperLight Load,
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trademarks of Microchip Technology Incorporated in the U.S.A.
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ViewSpan, WiperLock, Wireless DNA, and ZENA are trademarks of
Microchip Technology Incorporated in the U.S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated in the
U.S.A.
The Adaptec logo, Frequency on Demand, Silicon Storage
Technology, and Symmcom are registered trademarks of Microchip
Technology Inc. in other countries.
GestIC is a registered trademark of Microchip Technology Germany II
GmbH & Co. KG, a subsidiary of Microchip Technology Inc., in other
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All other trademarks mentioned herein are property of their respective
companies.
© 2020, Microchip Technology Incorporated, All Rights Reserved.
ISBN: 978-1-5224-5566-0
For information regarding Microchip’s Quality Management Systems,
please visit www.microchip.com/quality.
2020 Microchip Technology Inc.
DS60001589D - page 7
®
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2020 Microchip Technology Inc.
page 8 - DS60001589D
JULY 2020
02/28/20B
