CM1452
Praetorian® LC-based EMI Filter Array with ESD Protection for Wireless Handsets
High Performance EMI Filtering with ESD Protection in 0.4mm ball pitch Chip Scale Packages

Product Overview
California Micro Devices introduces the new CM1452, a new L-C based filter array available in four, six or eight channels of EMI filtering with integrated ESD protection. These devices are available in 10-, 15- and 20-bump Chip Scale Packages (CSP). These devices are available in 0.4mm pitch CSPs for a significant space reduction when compared to discrete solutions. These devices are ideal for portable electronics, especially wireless handsets, PDAs and notebook computers due to their small package size. Typical applications for these devices include EMI filtering & ESD protection for data and control lines on I/O ports, LCD displays and camera interfaces in mobile handsets.

Product Features
Each channel of the CM1452 consists of a 3 pole L-C filter with a minimum inductor value of 17nH and nominal capacitor values of 15pF. The CM1452’s insertion loss is much lower than R-C filters, typically less than 1dB. With a typical corner frequency of 300MHz, rolloff of 20dB/octave and attenuation greater than 30dB between 800MHz and 3GHz, the CM1452 offers industry leading filter performance. In addition, the CM1452 features robust ESD protection up to ±15kV contact discharge per IEC61000-4-2 Level 4 specification and ±30 kV using the Human Body Model (HBM).

The device is housed in an industry leading 0.40mm pitch Chip Scale Package (CSP) featuring sizes of 1.67mm x 1.05mm, 2.47mm x 1.05mm and 3.30mm x 1.05mm for the 4, 6 and 8 channel versions respectively. This represents an unique opportunity for designers to save up to 45 percent space versus equivalent 0.50mm pitch CSP or traditional plastic package solutions such as TDFN. Competing ceramic solutions require the use of additional diodes for ESD protection, thus increasing cost and form factor by up to 55 percent.

Product Applications
The CM1452 is ideal in the following 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 computers
  • Wireless handsets
  • Handheld PCs/PDAs
  • LCD and camera modules

Sampling, Pricing and Availability

The CM1452 is currently sampling, and pricing starts at $0.24, $0.33 and $042 in 1,000 units for the 4, 6 and 8 channel configurations respectively. Production is scheduled for Q2 2006. The CM1452 is a lead free product and CMD’s Optiguard™ coating option is available for increased robustness.