28G Multi-protocol SerDes PHY

Features

• Optimized for low-power operation and north/south die-edge placement
• Duplex Lane configurations of x4 and x1
• Adaptive receive equalizer with programmable settings providing up to 12dB of CTLE and 8-tap DFE support
• An LC-PLL provides a wide range of operating frequencies
• Embedded microcontroller for improved system configuration loadsWide range programmable multipliers for reference clock multiplicationPHY is spec compliant across a wide operating junction temperature range (-20 °C to 125 °C). PLLs, bias circuits, and data path are functional between -40 °C to -20 °CBuilt-in Self Test (BIST) supportBuilt-in PRBS15/31 and custom pattern generation and checking for standalone testing

Benefits

• Multi-protocol PHYs supporting data rate in the range of 1.25 Gbps - 28.1 Gbps
• Optimized for low-power operation and north/south die-edge placement
• AC-coupled RX front end with on-chip capacitors
• Flexible ASIC interface for sharing impedance codes among multiple PMA hard macros and reducing the number of external reference resistors for impedance calibration
• Duplex Lane configurations of x4 and x1
• An LC-PLL provides a wide range of operating frequencies
• Wide range programmable multipliers for reference clock multiplication
• Differential reference clock inputs are selectively sourced from C4 or internal ASIC interface pins
• Flexible ASIC clocking
• Programmable clock outputs from the PLL to the ASIC core
• Parallel data, transmitted to the PMA, is synchronous to the transmit parallel data clock from the ASIC core
• Tight lane skew control in the PMA
• Adaptive receive equalizer with programmable settings providing up to 12dB of CTLE and 8-tap DFE support
• Support transmit FIR adaptation through back channel for Ethernet applications
• Built-in Self Test (BIST) support
• At-speed functional test capability with low-speed reference clocks
• Built-in PRBS15/31 and custom pattern generation and checking for standalone testing
• Internal serial loopback with optional phase advancing
• Parallel loopback supported within the PMA
• In-situ real-time monitoring and receive data eye schmoo through an adaptive receive sampler
• ATPG Mux Scan support for digital logic
• IEEE 1149.6 JTAG boundary scan for serial link pins
• Multiple interfaces for the access of PMA registers
• Provides direct register control of all PMA functionality, as well as extended features
• Interfaces available for connection to a JTAG TAP controller or through a simple parallel read/write port
• Optional MDIO interface can be provided as required for Ethernet standard PHYs
• PHYs are spec compliant across a wide operating junction temperature range (-20 °C to 125 °C). PLLs, bias circuits, and data path are functional between -40 °C to -20 °C
• A complete design kit for fast SoC integration

Deliverables

• PMA Hard Macro
• Datasheet
• SoC integration guide
• Optional design integration and bring-up support services

Applications

• Automotive,Communications,Consumer Electronics,Data Processing,Industrial and Medical,Military/Civil Aerospace,Others

Block Diagram of the 28G Multi-protocol SerDes PHY IP Core

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