LPDDR4 SDRAMs reduce power consumption for mobile devices

Alliance Memory has expanded its high-speed CMOS, mobile, low power SDRAMs, and has added LPDDR4 devices which feature on-chip error code correction (ECC).

They offer improved performance with higher power efficiency than previous-generation LPDDR3 SDRAMs, reports the company. The new SDRAMs are the 2Gbit AS4C128M16MD4-062BAN, 4Gbit AS4C256M16MD4-062BAN and AS4C128M32MD4-062BAN, and 8Gbit AS4C256M32MD4-062BAN are available in the 200-ball FBGA package. They offer low voltage operation of 1.1V/1.8V, where they can increase battery life in portable electronics for the consumer and industrial markets, including tablets, wearables, handheld gaming consoles and personal navigation systems.

The LPDDR4 SDRAMs provide increased efficiency for advanced audio and high-resolution video in embedded applications, says Alliance. The LPDDR4 SDRAMs deliver fast clock speeds of 1.6GHz for high transfer rates of 3.2Gbits per second. For automotive applications, including infotainment and advanced driver assistance systems (ADAS), the AEC-Q100 qualified devices operate over a temperature range of -40 to +105 degrees C.

The LPDDR4 SDRAMs are organised as one channel (AS4C128M16MD4-062BAN and AS4C256M16MD4-062BAN) and two channels (AS4C128M32MD4-062BAN and AS4C256M32MD4-062BAN) per device. Individual channels consist of eight banks of 16bits. The components offer fully synchronous operation, programmable read and write burst lengths of 16, 32, and on the fly and selectable output drive strength. An on-chip temperature sensor controls the self-refresh rate.

The LPDDR4 SDRAMs have minimal die shrinks and provide reliable drop-in, pin-for-pin-compatible replacements, says Alliance.

Samples and production quantities of the LPDDR4 SDRAMs are available now, with lead times of eight weeks.

Alliance Memory provides critical and hard-to-find memory ICs for the communications, computing, consumer electronics, medical, automotive, and industrial markets. The company’s product range includes flash, DRAM, and SRAM memory ICs with commercial, industrial, and automotive operating temperature ranges and densities from 64kbit to 8Gbit.

Alliance Memory is privately held and maintains headquarters in Kirkland, Washington, and regional offices in Europe, Asia, Canada, and South America.


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