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Analogue switches in CSP offer 0.5Ω RON

Posted: 19 Dec 2005     Print Version  Bookmark and Share

Keywords:Pericom Semiconductor  analogue switch  PI5A4xxx 

Pericom Semiconductor Corp. has introduced a family of advanced analogue switches created for mobile terminal applications which feature Chip Scale Packaging (CSP), very low ON-resistance, and wide voltage ranges to address the demands of next generation portable application requirements.

The new new PI5A4xxx ICs are dual high-bandwidth SPDT and SP3T CMOS analogue switches housed in 2-by-1.5-by-0.6mm CSP packaging. Designed for the mobile market, these small footprint switches are being used for multi-band functions, polyphonic ring tones (MIDI), hands-free functions, FM radio, MP3/MP4 players, and memo recorder applications.

"The convergence of more features and connectivity into increasingly smaller cellphones and other mobile terminals is driving the demand for analogue switches in the smallest available packages. Even with the smallest die, the plastic packaging form factor had been the limiting aspect to offering smaller footprints for PC boards," explained Pericom Marketing Director Shaf Rahman. "Understanding this constraint, Pericom's micro-coated CSP packages, with a solder bump pitch of 0.5mm for easy handling, have eliminated the plastic housing around the die."

"Combining the low R-On (0.5Ω), wide voltage ranges (1.65V to 5.5V), and small package, have allowed us to obtain major design wins with several top mobile terminal manufacturers," added Rahman.

Additional features of the new analogue switches include an off-isolation of -42dB to -53dB, cross-talk rejection of -80dB that reduces signal distortion, and extended industrial temperature range of -40°C to 85°C.

The new devices announced include the PI5A4684, a low voltage dual SPDT analogue switch (2:1 Mux/DeMux bus switch); the PI5A4765, a low voltage dual SPDT audio click-less analogue switch with headphone/mute detection (2:1 Mux/DeMux bus switch); the PI5A4764, a low voltage dual SPDT audio click-less analogue switch (2:1 Mux/DeMux bus switch with shunt switches); and the PI5A4213, a low voltage dual SP3T analogue switch (3:1 Mux/DeMux bus switch).

Free samples, datasheets, IBIS, application note and technical support are already available. The new switches are also in full production with pricing set around Rs.27.51 (60 cents) in 10,000-unit quantities.

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