High Speed Digital Cable

High Speed Digital FFC Cable

TennRich International Corp.

TennRich International Corp. Tel: 886-03-3124888 ● Fax: 886-03-3124003 ● www.tennrich.com

Outline

1.Introduction
2.Products Assembly Structure
3.Electric Requirements Design
4.Signal Quality Measurement Validation
5.Conclusion


Digital signal Interface

Display /
NB PC TV Game Machine

LVDS 750M 750M 750M
USB 480M 480M
SATA 1.5 G 1.5 G 1.5 G
HDMI 1.65 G 1.65 G
Bluetooth 480M 480M
PCI Express 2.5 G 2.5 G


Cable Assembly Module
LVDS

Specification
•Insulation Resistance over 100MΩ
•Contact Resistance low than 40mΩ
•Cable Differential Impedance 100±10Ω
•Mating Force low than 6 kg
•Un-mating Force high than 0.76 kg
•Salt water spray: Contact resistance <80mΩ

Applications
Notebook Computer
FFC cable connector M-board to display cut
across of hinge.

High Definition LCD TV
FFC cable connector M-board to display.

Multifunction Printer
FFC cable connector M-board
to display or I/O board


USB/Bluetooth

Specification Ne
w
•Cable Differential Impedance 90Ω±15%
•Rated Current 0.5mA
•Working Voltage 5VDC
FFC connector type cable assembly
Character Impedance TDR test result

Early solder type connector


SATA

Specification
•Rise Time low than 85 ps (35ps input)
•Crosstalk low than 26dB (10~4500MHz)

Applications
Notebook Computer
Cable connects Main board to story system
equipment with standard plug-in connector.

Digital Photo Frame
equipment or I/O interface.

UMPC Computer
equipment or I/O interface.


HDMI

Specification
•Rise Time low than 200 psec (10%~90%)
•Crosstalk low than 26dB (10~4500MHz)
Applications
Notebook Computer
Cable connects Main board to HDMI
interface I/O connector.

PDP, LCD HDTV
Cable connects Main board to HDMI
interface I/O connector.

Set Top Box / DVD Player
Cable connects Main board to HDMI/DVI
high speed signal interface I/O connector.


PCI Express

Specification
•Compatible with Ultra ATA 133 standard
•Cable include power bus 5VDC, 500mA
Applications
Notebook Computer
Cable connects Main board to Laptop
interface driver.

PDP, LCD HDTV
interface driver

Game Machine / DVD Player
interface driver.


Product Assembly Structure


Product Assembly Structure
FFC Production Process
Flat Flexible Cable (FFC) were adopted in 1970 as a standard interface to jumper between
printed circuit boards. It is made up of thin rectangular tin-plated copper conductors laminated
between two layers of polyester insulator tape. These conductors are left uncovered on each end
to make electrical contact with the connector. A stiffener is bonded to the cable end which
provides mechanical stability for the exposed conductors during mating and unmating. This type
of cable is used when a straight one-to-one connection is required.


Electrical requirements design

Characteristic Impedance
Differential traces
Use controlled impedance FFC cable line that match the differential impedance of your
transmission medium and termination resistor. Route the differential pair traces as close together
as possible and as soon as they leave the IC. This helps to eliminate reflections and ensures that
noise is coupled as common-mode. Signals that are 1 mm apart radiate far less noise than traces
3 mm apart, as magnetic field cancellation is much better with the closer traces. In addition,
noise induced on the differential lines is much more likely to appear as common-mode which is
rejected by the receiver.

Stripline Dirrerential traces Equation of Stripline


Electrical requirements design

Dielectric Constant Control
Dielectric constant
A material is classified as “dielectric” if it has the ability to store energy when an external
electric field is applied, If an AC sinusoidal voltage source V is placed across the same capacitor,
the resulting current will be made up of a charging current Ic and a loss current Il that is related
to the dielectric constant. The losses in the material can be represented as a conductance (G) in
parallel with a capacitor (C).

AC Dielectric constant test structure Equation of Dielectric constant


Measurement Validation

• Tektronix’x TDS 8200 oscilloscope
• 2-80E04 sampling modules
• IConnect S-parameter software
• USB/SATA/HDMI test adaptors
• Set of four SMA matched Length cables


Outline



Characteristic Differential Impedance - 91.38 Ω

Multi layer with EMI solution
Impedance control material


SATA II – FFC Cable Signal Integrity Testing Result

Insertion Loss: -4dB
Cable Absolute Impedance 93~103Ω

Eye Diagram with SATA I Mask : Pass K-28.5 : 14 ps


Conclusion

High Speed Digital FFC Cable Module

Space Saving
It can be stacked in layers allowing even more signals to be
transmitted without increase in size.
Small Dimensions
Due to the increased surface area of flat conductors, it has far more
current capacity than equivalent round conductors, which
maximizes heat dissipation.
Excellent Flexibility
Superior bendability similar to flex circuits (FPC), but better flexibility
than other like PVC cables.
Saving Process Cost
Easy insert to and pull out from connector and/or solder directly onto
PCB.
Saving Material Cost
Applicable as FPC replacement, with more cost effective compared
with FPC.
Halogen Free
All Assembly parts can matching Halogen Free Standard


Thanks for your
attention


For more information about our products, please contact:-

KS Ho
Business Development Manager
TennRich Technology (S) Pte Ltd
48, Toh Guan Road East, Enterprise Hub, #06-109,
Singapore 608586
Email: ksho@tennrich.com.sg
Tel: +65 64112106
Mobile: +65 93874351

High Speed Digital Cable

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