CMOS PSRAMs have densities to meet high bandwidth, low power applications

Densities from eight to 128Mbit are offered in the family of high speed CMOS pseudo SRAMs (PSRAMs) by Alliance Memory. They are offered in 48- and 49-ball FPBGAs.

The packages measure 6.0 x 7.0 x 1.0mm for the 48-ball FPBGA and 4.0 x 4.0 x 1.0mm for the 49-ball FPBGA packages.

According to Alliance, the devices combine the most desirable features of SRAMs and DRAMs to provide designers with low power, and cost-effective memories for wireless, automotive, networking, and industrial applications.

The AS1C1M16PL-70BIN, AS1C1M16P-70BIN, AS1C2M16P-70BIN, AS1C512K16PL-70BIN, and AS1C512K16P-70BIN PSRAMs have high-density DRAM cores with SRAM interfaces and on-chip refresh circuits for refresh-free operation. They provide the high bandwidth and the low power necessary to replace SRAMs in portable electronics such as mobile phones and PDAs, or to serve as companion chips to burst NOR Flash applications, says Alliance.

The interfaces of the PSRAMs are compatible with asynchronous type SRAMs. The AS1C4M16PL-70BIN and AS1C8M16PL-70BIN CellularRAM PSRAMs feature a multiplexed address/data bus for greater bandwidth. The memories support asynchronous and burst operation, and feature read or write burst lengths of four, eight, 16, or 32 words, or continuous burst.

The devices are available in industrial temperature ranges, and offer fast access speeds of 70 seconds and operate from a single power supply of 1.7 to 1.95V or 2.6 to 3.3V.

Additional power-saving features include auto temperature-compensated self-refresh (ATCSR), partial array self-refresh (PASR), and a deep power down (DPD) mode.

Samples and production quantities of the PSRAMs will be available in November 2018, with lead times of eight weeks.

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

Alliance Memory has headquarters in San Carlos, California, USA and regional offices in Europe, Asia, and South America.

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