PDF CM1457 Data sheet ( Hoja de datos )

Número de pieza	CM1457
Descripción	8-Channel EMI Filter Array
Fabricantes	ON Semiconductor
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No Preview Available ! Praetorian III® 4, 6, 8-Channelwww.DataSheet4U.com EMI Filter Array with ESD Protection CM1457 Features • Four, six, or eight channels of EMI filtering • ±15kV ESD protection (IEC 61000-4-2, contact discharge) at external pins • Greater than -40dB of attenuation at 1GHz MIL_STD_883 international ESD standard • Chip Scale Package (CSP) with 0.40mm pitch and 0.25mm CSP solder ball which features extremely low parasitic inductance for optimum filter and ESD performance • OptiGuardTM coating for improved reliability at assembly • RoHS-compliant, lead-free finishing Applications • LCD and camera data lines in mobile handsets • I/O port protection for mobile handsets, notebook computers, PDAs, etc. • EMI filtering for data ports in cell phones, PDAs or notebook computer • Wireless handsets • Handheld PCs/PDAs • LCD and camera modules Note: Refer to Application Note AP-217, "The Chip Scale Package", for a detailed description of Chip Scale Packages offered by California Micro Devices. See http://www.wlcspforum.org/documents/pdf/ap- 217.pdf for download. Block Diagram Functional Description The CM1457 is an inductor-based (L-C) EMI filter array with ESD protection, which integrates four, six, or eight filters in a CSP form factor with 0.40mm pitch. Each EMI filter channel of the CM1457 is implemented with the component value of 6pF-35nH–4.7pF-35nH–1.8pF. The cut-off frequency at -3dB attenuation is 300MHz and can be used in applications where the data rates are as high as 160Mbps, while providing greater than -35dB attenuation over the 800MHz to 2.7GHz frequency range. The parts include ESD diodes on every I/O pin and provide a high level of protection against electrostatic discharge (ESD). The ESD protection diodes connected to the external filter ports are designed and characterized to safely dissipate ESD strikes of ±15kV, which is beyond the maximum requirement of the IEC61000-4-2 international standard. This device is particularly well suited for wireless handsets, mobile LCD modules and PDAs because of its small package format and easy-to-use pin assignments. In particular, the CM1457 is ideal for EMI filtering and protecting data and control lines for the LCD display and camera interface in mobile handsets. The CM1457 incorporates OptiGuardTM which results in improved reliability at assembly. It is manufactured with a 0.40mm pitch and 0.25mm CSP solder ball to provide up to 28% board space savings vs. competing CSP devices with 0.50mm pitch and 0.30mm CSP solder ball. Cn* (Externa l Pi ns) 35nH 35 nH 6p F 4 .7p F 1 .8 p F An* (Interna l Pin s) GND (Pins B1 -B4) ©2010 SCILLC. All rights reserved. May 2010 – Rev. 4 Publication Order Number: CM1457/D 1 page CM1457 Performance Information www.DataSheet4U.com Insertion Loss Vs. Frequency (0V Bias) 0 dB -10 dB -20 dB -30 dB -40 dB -50 dB 3 10 100 1000 FREQUENCY (MHz) Insertion Loss Vs. Frequency (2.5V Bias) 2000 6000 Rev. 4 \| Page 5 of 9 \| www.onsemi.com 5 Page

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