(dB) demand greater integration more functionality consumer elect

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AND8180/D Filtering Solution Large Data Arrays
(dB)
demand greater integration more functionality consumer electronics, such cell phones other hand-held products, caused increase number data lines being used. These data lines could from PDA's display, cell phone's connector rest phone. Because size constraints many these products, advantageous have many components possible integrated into single component. When large numbers data lines required, integration reduce part count significantly. Electrostatic Discharge (ESD) Electromagnetic Interference (EMI), filtering NUF9001FC offers capability provide protection data lines single flip-chip package. integrating protection into single flip-chip component, number discrete components reduced least twenty. size advantage NUF9001FC with lines, enables used across many platforms. same part used provide protection filtering whether lines used.
Functionality
important that ground bumps properly attached, even when filter lines being used. Omitting ground bumps will cause significant increase inductance ground path. This, turn, changes frequency response filters.
LOW-PASS FILTER INPUT OUTPUT
RI/O Cinput
Figure Functional Schematic NUF9001FC
1.E+06 Channel 1.E+07 1.E+08 1.E+09 1.E+10 Channel Channel
NUF9001FC utilizes diodes provide protection each data line. junction capacitance diodes provides capacitance element pass filter. using integrated diode, rather than discrete varistor, similar protection remains consistent over repeated events. variation clamping voltage with respect surge magnitude also less when using diode. Further explanation found AND8026/D. combination series with (Figure line capacitance ground, gives filter attenuation over (Figure cut-off frequency under loads. This frequency response makes NUF9001FC ideal applications with data rates Mbps. ensure proper functionality, ground bumps must attached well-defined ground plane. doing will change behavior filter. very
FREQUENCY (Hz)
Figure Insertion loss each channel NUF9001FC. graph shows comparison insertion loss each channel.
Another benefit NUF9001FC offers, independent bidirectional lines used more than data lines. example, there sets data lines, with four lines other with lines, near data port connector, NUF9001FC capability handle data. With more than isolation between
Semiconductor Components Industries, LLC, 2004
August, 2004 Rev.
Publication Order Number: AND8180/D
AND8180/D
adjacent data lines pass band, there issue with analog cross talk. This means multiple sets data sharing NUF9001FC will interfere with each other. layout NUF9001FC optimized ease routing large data arrays. With each line filter array, such that input output pins mirrored side device (Figure series ground bumps located down center line NUF9001FC achieve maximum grounding routing convenience (Figure
CONFIGURATION (Ball Side)
electronic devices from that come from connector. other typical NUF9001FC inline filter data lines displays. NUF9001FC would located next output display driver.
IN10
Digital Logic Transceiver
NUF9001FC
Connector
Figure Bump Configuration
Figure NUF9001FC used ESD/EMI filter located between connector digital transceiver.
Display Driver
NUF9001FC
Display
Figure Typical routing NUF9001FC. lines routed single layer line tolerances fine enough. multi-layer boards, bumps placed solderable vias.
Figure NUF9001 used filter display. Protection particularly needed "flip" phones where data lines susceptible folding joint.
NUF9001FC used number configurations. common configurations inline ESD/EMI filter between digital logic transceiver data port connector Figure providing filtering protection between video display driver display (Figure When used with data port connectors, NUF9001FC should electrically close connector possible. This done protect phone other
NUF9001FC limited filtering data connectors data displays, used anywhere space limited with number data line that needs protected. should remembered that whenever protection needed, protection devise should placed near possible source. NUF9001FC's size form factor makes good choice applications with large number data lines.
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AND8180/D
Notes
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AND8180/D
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AND8180/D

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