CM1637

• 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

California Micro Devices&primes 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-200-7.5pF. 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.

CM1637 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&prime 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.