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February, 2020
Alliance Memory Adds CMOS DDR4 SDRAMs
San Carlos, CA — Alliance Memory has expanded its product offering with a new line of high-speed CMOS DDR4 SDRAMs. For improved per- formance over previous-generation DDR3 devices, the 4 Gb AS4C - 256M16D4 and AS4C512M8D4 offer lower power consumption and faster data transfer rates in 96-ball and 78- ball FPBG packages, respectively. Compared with DDR3 SDRAMs,
the devices reduce operating voltages from 1.5 to 1.2V (±0.06V) to increase battery life in portable electronics, such as notebook computers, smart- phones and tablets. For increased effi- ciency and performance in desktop computers and servers, the 256 Mb x 16-bit AS4C256M16D4 and 512M x 8- bit AS4C512M8D4 offer up to 16 memory banks and deliver faster clock speeds to 1,333 MHz for extremely high transfer rates of 2,400 Mp/s per pin (1,200 MHz) and 2,666 Mb/s per pin (1,333 MHz). With minimal die shrinks, the
DDR4 SDRAMs provide reliable drop- in, pin-for-pin compatible replace - ments for numerous similar solutions, eliminating the need for costly redesigns and part requalification. Offered in extended commercial and industrial temperature ranges, the devices are suitable for the industrial, medical, IoT, automotive, gaming, and consumer markets. The AS4C256M16D4 and AS4C -
512M8D4 support sequential and interleave burst types with read or write burst lengths of BL8/BC4 or 8 on the fly. An auto precharge function provides a self-timed row precharge initiated at the end of the burst sequence. Easy-to-use refresh func- tions include auto- or self-refresh. JEDEC- and RoHS-compliant, the
devices are lead- and halogen-free. Contact: Alliance Memory, Inc.,
511 Taylor Way, San Carlos, CA 94070 % 650-610-6800 E-mail:
kim@alliancememory.com Web:
www.alliancememory.com
LK Metrology Intros Series of Compact CMMs
Brighton, MI — LK Metrology has introduced a range of CMMs, designed to offer high accuracy and repeatabili- ty in a compact footprint. The new ALTERA machines are available in three sizes and are built for applica- tions in aerospace, automotive, med- ical, and other industries with demanding inspection requirements. ALTERA is equally at home in
an inspection department or on the shop floor, especially as pneumatic mounts isolate the CMM well from nearby sources of low frequency vibra- tion, such as large machinery. Use of Renishaw encoders with
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0.05 µm resolution optical scales for high volumetric accuracy not only leads to excellent metrology but also provides immunity to the ingress of contaminants. Measurements taken with a
touch-trigger probe at a series of points, ideal for acquiring informa- tion on dimensional accuracy, is increasingly being augmented by continuous-contact probing (analog scanning) and laser scanning to allow high-speed collection of data on complex freeform surfaces. ALTERA measuring machines
can deploy all three types of sensor. Such flexible data acquisition boosts measurement throughput to avoid bot- tlenecks in the metrology department, provides a comprehensive awareness of component conformance, and meets today’s requirements for a CMM that underpins concurrent engineering practices to speed time to market for new products. The CMM structure has been
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optimized using computer-aided solid modeling and finite element analysis, particularly within the bridge section, and is finely tuned to maximize stiff- ness, reduce vibration and provide smoothness of axis motion, all of which are fundamental to delivering high-accuracy measurements. All guideways use LK-designed, low- maintenance, pre-loaded air bearings of wraparound design offering 3.5 times higher stiffness than standard air bearings. They run with a
reduced air film thickness for low energy consumption and give repeat- able measurement results, even at fast axis speeds. Friction drives pro-
ALTERA series CMM.
vide smooth motion and exact posi- tioning at continuously varying speeds, as well as zero backlash, overload protection and low mainte- nance costs. Machine construction includes
the use of ceramic for the moving bridge and spindle. It is more than three times stiffer than aluminum yet only one-third heavier by volume, resulting in higher machine accelera- tion and speed. Ceramic does not stress-relieve like aluminum, leading to better long-term dimensional sta- bility. The thermal expansion coeffi- cient of ceramic is like that of granite and four times lower than alu- minum, which makes the structure highly resilient to thermal move- ment. Ceramic is three times harder than aluminum, so is more resistant to abrasive wear and indentation. ALTERA is available with LK’s
powerful CAMIO8 DMIS-based, multi-sensor software, enabling pro- gramming and measurement based on 3D CAD data and comprehensive
reporting. Contact: LK Metrology, Inc.,
12701 Grand River, Brighton, MI 48116 % 810-263-6100 E-mail:
marketing.us@
lkmetrology.com Web:
www.lkmetrology.com
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