Winbond's 64 Mb pSRAM solution offers low-profile, low-power performance ideal for IoT wearables.
Pseudo SRAM (PSRAM) devices are experiencing a design revival with wearable devices. Also known as CellularRAMTM, PSRAM were widely used in feature mobile phones. A typical IoT wearable design require low power for extended battery life and use lower RAM density in the smallest possible packages. Most wearables are tasked to monitor a finite set of parameters which means not a lot of computing power or the need for large memory size. These design requirements make PSRAM a natural choice.
It is not surprising that connected IoT wearables chose a mature technology driven by mobile device for best value. Winbond’s offers a variety of PSRAM densities from 32 Megabit to 256 Megabit in BGA packages.
Winbond’s PSRAM Product Features
• Broad density offering from 32 Megabit to 256 Megabit
• Operating voltage range: 1.7V to 1.9V
• Memory organization: x16
• 133 MHz Clock Rate
• 70 ns Random Access Time
• Option for Address Data Multiplex (ADM) to take advantage of less pins or Address Data Parallel (ADP)
• Standard 54 BGA for all densities, 49 BGA for 64 Megabit only
Winbond is the market leader for PSRAM shipments. The 64 Megabit featured device, W956D6KBKX7I, is available in a thin, low pin count, 49 ball BGA. As shown below, compared to a penny, the package is ideal for wrist type wearables.
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These 1.8V low power devices include a deep, power down sleep mode which help to extend the IoT device’s battery life. Additional features that support less overall power consumption include partial-array self-refresh and configurable drive strengths of ½ and ¼ strength.
About Winbond
Winbond Electronics Corporation is a memory IC company engaged in design, manufacturing and sales services to provide its global customers top quality memory solutions. Winbond’s product lines include NOR Flash Memory, Serial and Parallel NAND, Specialty DRAM and Mobile DRAM.
Winbond products are widely used by companies in the IoT vertical markets such as computing, connected multimedia devices, automobile, networking systems and industrial. Winbond offers automotive and Industrial-Plus grade Flash and DRAM products with longevity support. Winbond has approximately 2,200 employees worldwide and is headquartered in Taichung, Taiwan.