Diodes Introduces PI7C1401 Four-port Expander

Diodes Corporation (Nasdaq: DIOD) is an industry-leading global manufacturer and supplier of high-quality application-specific standard products that cover a wide range of industries, including the independent, logic, analog, and mixed-signal semiconductor markets. The company announced the launch of the PI7C1401 four-port expander. PI7C1401 is an economical low-speed signal management and I2C aggregation solution for advanced embedded systems with multiple high-speed interfaces. The PI7C1401 is suitable for any application equipped with multiple high-speed transceivers, including standard SFP (Small Package Pluggable Transceivers), dual-port SFP (DSFP) and quad-port SFP (QSFP), such as in telecommunications, networking and data center equipment. Baseband unit, router and switcher.


Generally speaking, each transceiver needs a dedicated control channel to connect to the host. This architecture is usually implemented using low-speed signal pins and low-speed communication protocols such as I2C. As the system becomes more complex, the requirements for transceivers have also increased. In order to support the greatly increased I2C interface and other low-speed signal pins, the load on the host controller is gradually increasing.


The PI7C1401 aggregates four low-speed ports into a single channel and combines multiple quad-port expanders to enable the host processor to control up to 56 transceivers through a single I2C / SPI interface. Through the above design, the host processor or FPGA can greatly reduce the number of pins required to control a high-speed transceiver, thereby simplifying PCB configuration and reducing the overall bill of materials (BoM) cost.


The I2C interface supports 1MHz fast mode, allowing up to 14 PI7C1401 devices to share one interface. These devices use Daisy-Chaining mode to connect the control pins and can set their respective addresses automatically. The SPI mode supports a bus speed of up to 33MHz, allowing an unlimited number of PI7C1401 devices to share a single SPI interface, improving work efficiency. In addition to port aggregation, the PI7C1401 also provides a variety of practical functions, including four User-Programmable GPIO and two dedicated outputs for driving status LED.


The PI7C1401 also supports functions such as automatically prefetching key user-defined data from the module, customizable data-driven interrupts, high-load read / write I2C / SPI interfaces, and a broadcast mode that can write to all ports simultaneously. These features greatly improve the port control efficiency of the PI7C1401, thereby meeting the demanding requirements of high-performance applications.


In addition, the PI7C1401 four-port aggregator also supports host-side independent I / O voltages from 1.8V to 3.3V. The aggregator is packaged in a 56-ZF (TQFN) package of 5mm x 11mm with a pin pitch of only 0.5mm. It can be mounted on the bottom of the PCB by surface bonding and is close to the physical interface.