2.5/5.0/8.0-Gbps 4-lane PCI Express redriver with equalization & De-Emphasis

The DS80PCI402 is a low-power, 4-lane

repeater with 4-stage input equalization, and an output de-emphasis driver to

enhance the reach of PCI-Express serial links in board-to-board or cable

interconnects. This device is ideal for x4 (or lower) PCI-Express configuration, and

it automatically detects and adapts to Gen-1, Gen-2, and Gen-3 data rates for easy

system upgrade.

DS80PCI402 offers programmable

transmit de-emphasis (up to 12 dB), transmit VOD (up to 1300 mVp-p), and receive equalization (up to 36 dB) to enable longer distance

transmission in lossy copper cables (10 meters or more), or backplanes (40 inches or

more) with multiple connectors. The receiver can open an input eye that is

completely closed due to inter-symbol interference (ISI) introduced by the

interconnect medium.

The programmable settings can be

applied easily through pins or software (SMBus/I2C), or can be loaded

through an external EEPROM. When operating in the EEPROM mode, the configuration

information is automatically loaded on power up, which eliminates the need for an

external microprocessor or software driver.