Product details


Features I2C aggregation GPIO management Frequency (Max) (kHz) 10000 Supply restrictions Host side 1.8V to 3.3V Rating Catalog Operating temperature range (C) -40 to 85 open-in-new Find other I2C level shifters, buffers & hubs

Package | Pins | Size

WQFN (RHU) 56 55 mm² 11 x 5 open-in-new Find other I2C level shifters, buffers & hubs


  • Control Signal Management and I2C Aggregation Across Four Ports
  • Combine Multiple FPC402s to Control 56 Total Ports Through a Single Host Interface
  • Eliminate Need for Discrete I2C Muxes, LED Drivers, and High-Pin-Count FPGA/CPLD Control Devices
  • Reduce PCB Routing Complexity by Handling All Low-Speed Control Signals Close to the Port
  • Selectable I2C (up to 1 MHz) or SPI (up to 10 MHz) Host Control Interface
  • Automatic Prefetching of Critical, User-Specified Data From the Modules
  • Broadcast Mode Write to All Ports Simultaneously Across All FPC402 Controllers
  • Advanced LED Features for Port Status Indication, Including Programmable Blinking and Dimming
  • Customizable Interrupt Events
  • Separate Host-Side I/O Voltage: 1.8 V to 3.3 V
  • Small WQFN Package Enabling Placement on Bottom Side of PCB Underneath Ports

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The FPC402 quad port controller serves as a low-speed signal aggregator for common port types such as SFP, QSFP, Mini-SAS HD, and others. The FPC402 aggregates all low-speed control and I2C signals across four ports and presents a single easy-to-use management interface to the host (I2C or SPI). Multiple FPC402s can be used in high-port-count applications with one common control interface to the host. The FPC402 is designed to allow placement on the bottom side of the PCB, underneath the press fit connector, to simplify routing. This localized control of the low-speed signals in the ports cuts system BOM costs by enabling the use of smaller IO count control devices (FPGAs, CPLDs, and MCUs) and by reducing routing layer congestion.

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More Information

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Technical documentation

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Type Title Date
* Data sheet FPC402 Quad Port Controller datasheet (Rev. C) Sep. 14, 2020
User guide FPC401 and FPC402 Evaluation Module (EVM) User ’s Guide (Rev. B) Sep. 03, 2019

Design & development

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Hardware development

document-generic User guide
The FPC402EVM aggregates all low-speed signals of two stacked on-board QSFP and SFP cages and LEDs, allowing full control of the four ports through a single I2C or SPI interface. The on-board MSP430 controller and GUI allow for easy configuration and testing of the FPC401 with both I2C and SPI and (...)
  • On-board SPI/I2C Controller for easy programming through USB
  • On-board QSFP and SFP Cages with LEDs
  • Reference layout for placement of FPC401 underneath SFP cage

Design tools & simulation

PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide

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WQFN (RHU) 56 View options

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