Jiangsu Runshi: Releases the RS0322 level‑shifting chip for I3C interfaces.
In the 1980s, Philips developed the I2C interface for interconnecting integrated circuits, and it has been widely used in data transmission ever since. However, as electronic devices have grown more complex and their applications have diversified, the limitations of I2C have become increasingly apparent. Despite three protocol revisions that boosted its speed from 10 kbps to a maximum of 5 Mbps, I2C still falls short of meeting today’s demands for high‑speed data transfer.
To address the challenges of multi-device integration and the limitations of traditional buses such as I2C and SPI, the MIPI Alliance has developed a next‑generation, fast, low‑power, and manageable two‑wire digital interface based on I2C, named MIPI I3C®—Improved I2C. This interface not only resolves the aforementioned typical issues but also introduces innovations in interoperability, bus management, and error detection and handling, while maintaining backward compatibility with legacy I2C.
The I2C interface, which employs an open-drain circuit architecture, requires pull-up resistors on the bus, resulting in significant power consumption. In contrast, MIPI I3C® adopts a push-pull design, enabling higher interface speeds while substantially reducing power dissipation.
The MIPI I3C® clock frequency has been extended to 12.5 MHz; its operating voltage range supports 1.0 V to 3.6 V, enabling compatibility with central processing units (CPUs) and peripherals operating in different voltage domains. However, due to these differing voltage domains, a bridging chip is required between the CPU and various peripherals to match signal levels.
The RS0322 is a level‑shifting chip designed to meet this application scenario, featuring low operating voltage and high slew rate. Its key specifications are as follows:
Ø The operating voltage range supports 0.72 V to 1.98 V;
Ø0.8V to 1.8V, supporting a data rate of 26 Mbps;
Ø Maximum quiescent current: 25 μA;
Ø Supports interfaces such as I3C, I2C, and SMBus;
Ø Supports power-down mode;
ØXDFN1.4X1-8 ultra-small package;
Ø Extended industrial temperature range: -40°C ~ 125°C.
The RS0322 employs an edge‑rate‑boosting circuit to achieve low‑voltage, high‑speed performance metrics, and, by balancing process constraints with practical application requirements, delivers outstanding AC and DC characteristics.
(Source: Jiangsu Runshi Official Website)
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