Octal Switch provides 8 kV ESD protection in cellphones.
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Press Release Summary:
Model ISL54230 features 8 SPDT switches that handle various signals, including USB, UART, PCM, audio, and power, and which can be configured to multiplex between pairs of signals or between groups of signals. Unused switches can be powered down to minimize battery drain, and signal pins are arranged in flow-through manner to avoid crossovers on PCB. Operating in temperatures from -40 to +85°C, unit is compliant with USB 2.0 short-circuit and overvoltage requirements.
Original Press Release:
Intersil's New Octal Switch Provides Unmatched Design Flexibility and >8kV ESD protection for Switching and Routing of Diverse Signal Types in High-End Cell Phones
Offering 4x the ESD Protection of Competitive Solutions, Intersil's ISL54230 Provides Simple, Space-Efficient way to Interconnect Baseband Chip, Application Processor, Internal SIM Cards and Other Support Chips in Full-Featured SmartPhones
MILPITAS, CA, July 24, 2009 - Intersil Corporation (NASDAQ Global Select: ISIL), a world leader in the design and manufacture of analog and mixed-signal semiconductors, today announced the ISL54230, a new octal switch that is ideally suited for high-end cell phone applications. The ISL54230's small size and flexibility allows designers to optimize the routing of the many different types of signals found in high-feature-set cell phone products.
The ISL54230 has 8 individual Single Pole Double Throw (SPDT) switches whose performance has been carefully designed to enable them to pass a wide range of precision voice and data signals, including high-speed USB, UART, PCM, audio and power. With the addition of simple logic control, the switches can be configured to multiplex between pairs of signals like USB 2.0 high-speed ports, or between groups of signals like SIM card clock, data and power lines. To minimize board space, the signal pins on the ISL54230 have been arranged in a 'flow-through' manner to avoid signal crossovers on the PCB. Unused switches can be powered down as required under logic control.
For dual-mode cell phones, the ISL54230 allows dual baseband chips to access either of two SIM cards while allowing the unused SIM card to be powered down in order to minimize battery drain. All signal lines have greater than 8kV ESD protection allowing for much safer SIM card insertion and removal.
Key Technical Features
o High-speed (480Mbps) and full-speed (12Mbps) signaling capability per USB 2.0
o Compliant with USB 2.0 short-circuit and overvoltage requirements without additional external components
o High-speed SIM Card, UART and PCM data-line switching
o Low-resistance switches for SIM card power line switching
o 2.0V to 5.5V supply range
o Rail-to-Rail analog signal switching
o 1.8V logic compatible (2.7V to 3.6V supply)
o Switch terminals overvoltage protected up to +5.5V
o Low switch leakage during power down
o Dual output-enable controls for selective shutdown of switches when not in use
o Electrostatic discharge (ESD) capability of greater than 8kV on all signal pins protects against ESD damage caused by SIM card insertion and removal.
o Operating temperature range of -40 degrees C to +85 degrees C.
Packaging, Pricing, and Availability
The ISL54230 is available in a 36-bump 2.53mmx2.53mm WLCSP package at $1.53 per 1000-unit quantities. It is also available in a 32-lead 5mmx5mm TQFN package for $1.40 per 1000 units in tape-and-reel option.
More information is available at www.intersil.com/products/deviceinfo.asp?pn=ISL54230
To view a high-resolution downloadable photo, visit Intersil's press room at: www.intersil.com/pressroom/photoarchives.asp.
About Intersil
Intersil Corporation is a leader in the design and manufacture of high-performance analog and mixed signal semiconductors. The Company's products address some of the industry's fastest growing markets, such as, flat panel displays, cell phones, other handheld systems, and notebooks. Intersil's product families address power management functions and analog signal processing functions. Intersil products include ICs for battery management, hot-plug controllers, linear regulators, power sequencers, supervisory ICs, bridge drivers, PWM controllers, switching DC/DC regulators, Zilker Labs Digital Power ICs and power MOSFET drivers; optical storage laser diode drivers; DSL line drivers; D2Audio products; video and high-performance operational amplifiers; high-speed data converters; interface ICs; analog switches and multiplexers; crosspoint switches; voice-over-IP devices; and ICs for military, space and radiation-hardened applications. For more information about Intersil or to find out how to become a member of our winning team, visit the Company's web site and career page at www.intersil.com.
