Corsair Announces Availability Of DDR1 XMS-4000 2GB Solutions

Infineon Announces New MOSFETs And Fan Motor Controller

Samsung Electronics Develops First GDDR4 Graphics DRAM

Corsair Announces Availability Of DDR1 XMS-4000 2GB Solutions

Corsair Memory announced immediate availability of the XMS- 4000PT 2GB kit. Available in both 1GB single and 2GB kit packages, the XMS-4000PT is guaranteed to run at 500MHz at 3-4-4-8-1T. The memory targets enthusiasts who demand the highest frequency at 1T command rate for maximum system performance.

The XMS-4000PT is currently available through Corsair's worldwide authorized distributors, resellers, retailers, and etailers. The introductory MSRP for a 2GB matched pair is $281 USD. The Corsair part number are TWINX2048-4000PT (matched pair) and CMX1024-4000PT (single).

Source: Corsair Memory

Infineon Announces New MOSFETs And Fan Motor Controller

Infineon announced two new products: the CoolMOS CP series of metal-oxide semiconductor field-effect transistors (MOSFETs) for high-efficiency power supplies used in telecommunications, notebook computer and consumer appliances. The second novelty is the TDA21801 Fan Speed Controller IC used to create a flexible, low-cost subsystem to control the speed of power supply cooling fans used in such applications as personal computers, industrial and medical equipment.

CoolMOS CP MOSFETs are intended for the PFC (power factor correction) and PWM (pulse width modulation) stages in medium-level power supply applications, such as telecommunications, notebook adapter and consumer devices. The new products have a voltage-blocking capability of 600V in a wide variety of package types. The low on-state resistance and low gate charge allow designers to significantly reduce the conduction and switching losses of power supplies. Alternatively, power supply output can be increased without changing other aspects of the design, resulting in lower system cost per watt of rated power.

At a typical price of between $0.70 and $1.80 in quantities of 100,000 (depending upon ohmic value) in a TO220 package, the CoolMOS CP series is available in the following packages: TO-252 D-PAK, TO-220, TO-220 FP (available by the end of 2005), TO-263 (D2PAK), TO-247.

The TDA21801 is an intelligent controller that allows manufacturers of cooling fan systems to deliver the functionality of a 4-wire fan using a lower cost 2-wire fan. A typical 4-wire fan solution with OTP (over-temperature protection) requires 27 components, while a 2-wire fan solution using the TDA21801 requires only 13 components.

The TDA21801 can adjust fan speed from 750 rpm to 4,000 rpm and its OTP capability is easily implemented and flexible. It generates an over-temperature early warning signal to prevent data loss in case of thermal faults, and also generates a tachometer signal for additional system monitoring features.

The TDA21801 Fan Speed Controller is available in a RoHS (Restriction of the Use of Certain Hazardous Substances)-compliant SO-8 package, at a price of $0.70 in quantities of 50,000.

Source: Infineon

Samsung Electronics Develops First GDDR4 Graphics DRAM

Samsung Electronics has developed the industry's fastest computer graphics memory and has shipped it to major graphics card manufacturers for testing. The first GDDR4 developed is a 256Mb chip that runs at 2.5Gbps.

Samsung Electronics has used DBI (Data Bus Inversion) and Multi-Preamble in the development of GDDR4 to eliminate data transmission delays. The result is a transmission speed claimed to be 56% faster than graphics products on the market today.

GDDR4 retains a design virtually identical to that of GDDR3, today's graphics DRAM of choice. This minimizes inconvenience to graphics card and chipset manufacturers in developing new products.

Samsung plans to introduce samples of 2.8Gbps GDDR4 by the end of this year with mass production to follow by the second quarter of 2006.

Source: Samsung Electronics

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