The DS125MB203 device is a dual port 2:1 multiplexer and 1:2 switch or fan-out buffer
with signal conditioning suitable for 10GE, 10G-KR (802.3ap), Fibre Channel, PCIe, Infiniband,
SATA3/SAS2 and other high-speed bus applications with data rates up to 12.5 Gbps. The continuous
time linear equalizer (CTLE) of the receiver provides necessary boost to compensate up to 30-inch
FR-4 or 8-m cable (AWG-24) at 12.5 Gbps. This on-chip feature eliminates the need for external
signal conditioners. The transmitter features a programmable amplitude voltage levels to be
selectable from 600 mVp-p to 1300 mVp-p and de-emphasis of up to 12 dB.
The DS125MB203 can be configured to support PCIe, SAS/SATA, 10G-KR or other signaling
protocols. When operating in 10G-KR and PCIe Gen-3 mode, the DS125MB203 transparently allows the
host controller and the end point to optimize the full link and negotiate transmit equalizer
coefficients. This seamless management of the link training protocol ensures system level
interoperability with minimum latency.
The programmable settings can be applied through pin settings, SMBus
(I2C) protocol or loaded directly from 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.
View datasheet View product folder