A microcircuit that combines USB Type-C and PD 2.0. Free Technical Library News

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Chip that combines USB Type-C and PD 2.0

17.01.2015

Etron Technology has introduced a product that complies with the USB 3.1 specification. We are talking about the EJ988 chip, which combines the functions of a USB Type-C key and a Power Delivery 2.0 controller. According to the manufacturer, for the first time in the world.

The EJ988 supports balanced bidirectional USB Type-C connectors and cables, and is rated for data transfer rates up to 10Gbps and power transfer up to 100W (20V, 5A). The presence of a built-in key provides the possibility of two-way switching, that is, a device with EJ988 can act as both a load and a power source.

The enhanced integration of the EJ988 has reduced the size of the solution, reducing the number of external components and PCB area. This is especially true in the case of laptops, mobile and wearable devices, for which the EJ988 is positioned.

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Kingston HyperX DDR4 memory modules 22.09.2014

The JEDEC standard specifies a supply voltage of 4 volts for DDR1,2 memory modules in the frequency range from 1600 to 3200 MHz. But many branded DDR4 kits designed for overclocking enthusiasts can operate at the manufacturer's declared frequency only at 1,5 volts, which is a lot for DDR4. Since the memory controller in all modern processors, including Haswell-E, is built-in, excessive enthusiasm for increasing the memory supply voltage can end in tears not only for the modules, but also for the processor itself, and even the most risky overclocker will hardly like the loss of a brand new "stone" worth $1000 .

Kingston seems to understand this well. Its pre-sale samples of HyperX DDR4 modules worked at a supply voltage of 1,5 volts, but the company conducted a study, as a result of which it turned out that 1,35 volts would be sufficient for the normal functioning of these modules. Mass shipping of the HyperX DDR4 series will begin this week, and the company says that the maximum value programmed into their SPD will be just that.

According to Intel engineers, 1,5 volts is not a critical memory supply voltage for Haswell-E, since their controller is capable of operating in two modes, and for DDR3 this supply voltage is standard. However, there are extreme versions of DDR3 memory kits on sale that require 1,65 volts. A number of cases of failure of Haswell-E processors and motherboards based on the Intel X99 chipset have already been recorded on the Web, but it is not known what was to blame - the "childhood illness" of the new platform or excessive flirting with clock frequencies and supply voltages.

In any case, Kingston's initiative looks reasonable, because a lower memory supply voltage means not only reliability, but also increased efficiency.

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