STMicroelectronics (NYSE: STM) announced a tiny, highly-integrated chip – produced using the company’s world-leading IPAD(TM) (Integrated Passive and Active Devices) technology – which provides five essential functions required by memory card interfaces in mobile phones, GPS navigation devices, digital cameras and a broad range of other consumer and industrial products that use removable Secure Digital (SD) protocol cards. The new flip-chip EMIF06-SD02F3 memory-card transceiver integrates signal conditioning, bidirectional level shifting, ESD (electrostatic discharge) protection, EMI (electromagnetic interference) filtering, and a 2.9V voltage regulator.
Integration of these circuits into a single monolithic chip increases system reliability and saves more than 75% of the board area required by a typical discrete solution. The EMIF06-SD02F3 requires less than 7 square millimeters of board space, compared to approximately 30 square millimeters to provide the same functions with discrete components, also simplifying the design and layout of the application.
The chip is compliant with standard and high-speed SD standards, and with MiniSD, MMC and uSD/TransFlash. It provides a high level of ESD protection to exposed external memory card slots, efficient EMI filtering to protect data lines against RF interference, and pull-up and pull-down resistors to prevent floating data lines. ESD protection on the card-side pins meets the stringent IEC61000-4-2 Level 4 standard, 15kV air discharge. The 800MHz to 3GHz EMI filter achieves over 20dB attenuation at 1GHz.
In addition, six high-speed bidirectional level shifters, designed for 50MHz operation and with 3ns typical propagation delay, enable the interfacing of 2.9V memory cards with 1.8V host processors. A maximum channel-to-channel skew of 1.5ns ensures data transmission integrity, and the drivers are optimized for low-power applications with quiescent off-current of 1-microamp.
Power for the memory card is provided through an on-chip 2.9V low drop-out (LDO) CMOS voltage regulator, with 200mA current capability and an input voltage range of 3.1V to 5V. The drop-out voltage is 100mV maximum with a 200mA load. A switch-off control pin, with fast 30us turn-on time, helps minimize a product’s power consumption and extend battery life, and the regulator includes thermal shut-down, under-voltage lock-out and short-circuit protection.
The EMIF06-SD02F3 is available in a lead-free, 24-bump, 400-micron pitch flip-chip, and is currently in volume production. It is priced at $1.10 for quantities up to 1 million units, and $0.95 in quantities of 1 to 5 million units.
STMicroelectronics is a global leader in developing and delivering semiconductor solutions across the spectrum of microelectronics applications. An unrivalled combination of silicon and system expertise, manufacturing strength, Intellectual Property (IP) portfolio and strategic partners positions the Company at the forefront of System-on-Chip (SoC) technology and its products play a key role in enabling today’s convergence markets. The Company’s shares are traded on the New York Stock Exchange, on Euronext Paris and on the Milan Stock Exchange. In 2006, the Company’s net revenues were $9.85 billion and net earnings were $782 million.