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The PI7C1401 is a I²C-bus/SPI Quad Port Expander, it’s specifically designed to manage common port types such as SFP+ and QSFP+. The PI7C1401 provides an I²C-bus/SPI interface, an interrupt output to host and four I²C interfaces, general purpose pins for low-speed control signals to the modules. The PI7C1401 can be used a wide range of applications such as Networking, Telecom, Storage/Data center, Embedded. The typical usage for this device is high volume applications requiring an "expander" to aggregate all low-speed control and I²C signals across four ports and presents a single I²C or SPI interface to host. Multiple PI7C1401s can be used in high-port-count applications with one I²C or SPI to host. The system BOM cost can be cut by using smaller IO count control device(FPGAs, CPLDs, MCUs) and by reducing routing layer congestion.
Telecom for Wireless Base Station
Embedded System for Video
Storage for Data Center
Support Low-speed signals management and I²C aggregation across four ports
Support multiple PI7C1401s to control high-port-count through a single host interface
Selectable I²C (up to 1Mhz) or SPI (up to 33Mhz) host control interface
Automatic pre-fetching of critical, user-specified data from the modules
Advanced LED features for port status indication, including programmable blinking and dimming
Support standard SFF-8431, SFF-8472, SFF-8436, SFF-8679, INF-8074 and other such low-speed electrical interfaces, including a dedicated 100/400Khz I²C interface to each port
Customizable events which trigger an interrupt to the host
Broadcast Mode allows writes to all ports simultaneously