California Micro Devices -- CM1637 Product Information


CM1637

4, 6 and 8-Channel EMI Filter Arrays with ESD Protection in UDFN Package

PRODUCT DESCRIPTION

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California Micro Devices's CM1637 is an EMI filter array with ESD protection, which integrates either four, six or eight pi filters (C-R-C). Each CM1637 filter has component values of 7.5pF-200Ω-7.5pF. These parts include ESD protection diodes on every pin, providing a very high level of protection for sensitive electronic components that may be subjected to electrostatic discharge (ESD). The ESD diodes connected to the filter ports safely dissipate ESD strikes of ±15kV contact discharge, twice the specification requirement of the IEC 61000-4-2, Level 4 international standard. Using the MIL-STD-883 (Method 3015) specification for Human Body Model (HBM) ESD, the pins are protected for contact discharges at greater than ±30kV.

This device is particularly well-suited for portable electronics (e.g. mobile handsets, PDAs, notebook computers) because of its small package and easy-to-use pin assignments. In particular, the CM1637 is ideal for EMI filtering and protecting data lines from ESD in wireless handsets.

The CM1637 is available in space-saving, ultra-lowprofile, 8-lead, 12-lead and 16-lead 0.4mm pitch UDFN packages. It is fabricated with California Micro Devices' Centurion™ process and available with lead-free finishing. This new small UDFN package provides up to 42% board space savings vs. the 0.50mm pitch UDFN packages.

FEATURES

APPLICATIONS

Four, six and eight channels of EMI filtering with ESD protection
Pi-style EMI filters in a capacitor-resistor-capacitor (C-R-C) network
±15kV ESD protection (IEC 61000-4-2, contact discharge)
±30kV ESD protection (HBM)
Greater than 25dB of attenuation from 800MHz to 3GHz
UDFN package with 0.40mm lead pitch:
- 4-ch. = 8-lead UDFN
- 6-ch. = 12-lead UDFN
- 8-ch. = 16-lead UDFN
Tiny UDFN package size:
- 8-lead: 1.7mm x 1.35mm x 0.5mm
- 12-lead: 2.5mm x 1.35mm x 0.5mm
- 16-lead: 3.3mm x 1.35mm x 0.5mm
Increased robustness against vertical impacts during manufacturing process
Lead-free finishing

I/O port protection for mobile handsets, notebook computers, PDAs etc.
EMI filtering for data ports in cell phones, PDAs or notebook computers.
EMI filtering for LCD, camera and chip-to-chip data lines

DATA SHEET(S)

	Part Number		Datasheet
	CM1637-04DE, CM1637-06DE, CM1637-08DE		Data Sheet (PDF - 2.23 MB) Last Revision Date: 2009-06-08 — Issue A

PACKAGING, FINISHING & STATUS INFORMATION

Part Number	Package	Lead-Free Finishing	Status
CM1637-04DE	uDFN-8		Active
CM1637-06DE	uDFN-12		Active
CM1637-08DE	uDFN-16		Active

Status Key

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