Compliant with State Grid standards, PSRAM has become an essential core device for HPLC chips.

With the accelerated construction of the new power system, the digital and intelligent upgrading of smart grids has entered a critical stage. HPLC (High-speed Power Line Communication) technology has become the core communication carrier for smart meters, concentrators and distribution area terminals, achieving full-scale popularization across the State Grid and China Southern Power Grid. Upgraded from minute-level data collection to distribution area topology identification, and evolving to dual-mode concurrent operation of HPLC and HRF as well as in-depth application of edge computing, the latest State Grid standards have raised higher requirements for HPLC chip performance. Memory bottlenecks have become a key factor restricting chips from delivering optimal performance. Featuring large capacity and high bandwidth, PSRAM (Pseudo Static Random Access Memory) has evolved into a standard core device for HPLC power line communication chips and a preferred solution for the domestic substitution trend.

In power line communication scenarios, HPLC chips undertake multiple core tasks including data acquisition, signal processing, protocol transmission and security encryption. However, the on-chip SRAM of traditional chips is generally limited to 256KB–512KB, far failing to meet actual application demands. A single frame of power data, communication protocol stack and topology table together exceed 1MB in data volume. Scenarios such as high-frequency collection, multi-node concurrency and dual-mode parallel operation impose stringent demands on memory capacity and read/write speed. The unique advantages of PSRAM are fully demonstrated in such scenarios. It combines the high capacity density of DRAM with the simple interface of SRAM, requiring no additional refresh controller. With fewer pins and easy integration, PSRAM effectively addresses the limitations of small capacity and high cost of traditional SRAM, while making up for the drawbacks of complex circuits and high power consumption of conventional DRAM, serving as the optimal and exclusive solution for HPLC chip memory expansion.

Tailored for State Grid HPLC chip application scenarios, our industrial-grade PSRAM products are mainly available in 64Mbit (8MB) and 128Mbit (16MB) specifications. Fully compatible with mainstream HPLC chips such as Hisilicon, Transwan, Neusoft, Dingxin, Smartchip Microelectronics and Linkhome, our products strictly comply with the latest mandatory State Grid standards including Q/GDW 1374.2-2025 and Q/GDW 11612-2025, and deliver four core supporting functions in practical applications.

Large-capacity cache for high-frequency collection and topology identification

HPLC chips are required to realize millisecond-level sampling, second-level data reporting and concurrent collection for hundreds of nodes. Our PSRAM can easily cache hundreds of data frames and complete distribution area topology data, avoiding packet loss, retransmission and collection failures caused by insufficient memory. It ensures 100% accuracy of distribution area data collection and provides reliable data support for grid line loss management and fault prediction.

High bandwidth and low latency for stable transmission in harsh environments

Power lines are exposed to complex conditions such as strong noise, sudden interference and signal attenuation. Adopting a QSPI interface, our PSRAM delivers a bandwidth of over 84MHz and a read/write latency below 20ns, supporting linear burst access and cross-page reading. It buffers signal processing data in real time and enables wait-free interaction between DSP and CPU, significantly reducing communication error rates and ensuring stable transmission of power line communication signals in harsh environments.

Dual-mode architecture compatibility to empower high-level application implementation

The new generation of State Grid HPLC chips (Hisilicon Hi3931, Transwan TR3540, Neusoft ES3320, etc.) adopt an HPLC+HRF dual-mode architecture, requiring simultaneous multi-task operation including PLC baseband processing, wireless radio frequency, protocol stack and security encryption. Our PSRAM allocates independent cache areas for each task to realize conflict-free and lag-free dual-mode parallel operation, perfectly supporting State Grid-specified high-level functions such as power failure reporting, ID management, phase identification and online firmware upgrade.

Industrial-grade quality for rigorous power grid operating conditions

As a core component of power equipment, our PSRAM is manufactured in strict accordance with industrial-grade standards, with an operating temperature range of -40℃ to +85℃, fully adapting to harsh outdoor and cabinet environments of power grids. With standby power consumption lower than 250μA, it meets the low-power design requirements of energy meters and terminal devices. In addition, it has passed specialized tests including ESD protection and EMC (Electromagnetic Compatibility), delivering strong anti-interference capability. Its stability has been verified by mass production of tens of millions of modules, enabling long-term and reliable continuous operation.

At present, our PSRAM has been mass-applied to power equipment including smart meters, concentrators, data collectors and distribution area terminals. Fully compatible with mainstream HPLC chip solutions and certified by State Grid interconnection and interoperability standards, our products serve provincial power companies of State Grid and China Southern Power Grid, as well as core terminal manufacturers such as Wasion, Linyang and XJ Electric, establishing ourselves as the preferred memory solution for HPLC communication modules.

HPLC technology is continuously upgrading toward higher bandwidth, diversified functions and enhanced reliability, and PSRAM has shifted from an optional peripheral to an indispensable core component for HPLC chips. Adopting domestically produced industrial-grade PSRAM optimized for power line communication scenarios not only eliminates memory bottlenecks and improves communication stability, but also helps enterprises seize domestic substitution opportunities, reduce supply chain risks and control production costs. We will continue to deepen our layout in the power industry, optimize PSRAM performance, and deliver customized memory solutions that fully meet State Grid requirements. Working with industry partners, we strive to facilitate the high-quality development of smart grids.

For samples, datasheets, detailed adaptation solutions or professional technical support, please feel free to contact us to jointly empower the high-quality development of smart grids:

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Technical Support: sales@manduic.com

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