ASIC DFT CDC Constraints Engineer

• Own and develop SDC/SSTA constraint strategies for functional and DFT scan-mode operations.
• Work on CDC violations impacting scan-shift failures and at-speed test escapes.
• Perform timing analysis and sign-off activities using industry-standard STA tools.
• Develop and maintain DFT-mode timing constraints for scan shift and capture operations.
• Analyze and resolve metastability and synchronization issues across clock domains.
• Debug and resolve scan-mode X-propagation issues.
• Collaborate with DFT, STA, and design teams for timing closure and test coverage improvements.

• 10+ years of ASIC/SoC experience with 5+ years in SDC constraint development and STA sign-off.
• Strong expertise in CDC synchronization structures and SDC constraint representation.
• Hands-on experience with PrimeTime, Tempus, or Fusion Compiler.
• Experience with SpyGlass CDC or JasperGold CDC for structural CDC analysis.
• Strong understanding of metastability, MTBF, and synchronizer settling time budgets.
• Experience constraining Gray-code FIFO pointers and pulse synchronizers.
• Solid understanding of scan insertion, scan chain stitching, and ATPG flow.
• Experience authoring DFT-mode SDC views including shift, capture, and at-speed modes.
• Familiarity with Tessent or Synopsys DFTC ATPG toolchain.
• Ability to debug X-propagation issues in scan mode arising from unconstrained CDC paths., * 10+ years of experience in ASIC/SoC development.
• 5+ years of hands-on experience in SDC constraint engineering and STA sign-off.
• Extensive experience in CDC theory, ATPG methodology, and timing closure., * Strong analytical and debugging skills.
• Ability to work in highly complex multi-clock SoC environments.
• Excellent understanding of CDC methodologies and DFT architectures.

Skills:

• PrimeTime
• Tempus
• Fusion Compiler
• SpyGlass CDC
• JasperGold CDC
• Tessent
• Synopsys DFTC
• ATPG
• STA
• CDC Analysis
• SDC Constraints
• ASIC/SoC Design

Qualification and Education:

• Bachelor s or Master s degree in Electrical Engineering, Electronics Engineering, Computer Engineering, or related technical field.