1. Model Number Breakdown Explanation GD25LB512MEYIGR GD25LB: GigaDevice Octal SPI NOR Flash series, 1.8V low-voltage supply 512: Capacity 512Mbit = 64MB ME: High-speed OPI 8-channel DTR specification with ECC error correction YI: Temperature grade -40℃ ~ 125℃ automotive wide-temperature range GR: Package suffix → SOP16 300mil wide-body tape and reel packaging 2. Core Electrical Parameters (Comparison with GD25X512ME) Supply voltage: 1.65V–1.95V (1.8V low-voltage) GD25X512ME: 2.7~3.6V 3V version Identical speed specifications OPI DTR up to 200MHz, peak read speed 400MB/s OPI SDR 166MHz, backward compatible with 4-wire/single-wire SPI Memory architecture: 256-byte page, 4K sector, 64K block Reliability Endurance: 100,000 sector erase cycles Data retention: 20 years Built-in hardware ECC, OTP unique serial number, hardware write protection, reset pin 3. Package and Appearance Package: SOP16 300mil, 16-pin wide-body surface-mount Identical appearance to GD25X512ME-SOP16, only model marking differs; product images are interchangeable Packaging: Tape and reel (GR = Tape&Reel) mass production packaging 4. Temperature Grade YI Explanation YI = AEC-Q100 Grade1 automotive-grade, operating temperature -40℃ ~ +125℃, suitable for vehicle domain control, Tbox, and automotive displays; Other options: Grade I (-40~85℃ industrial), Grade H (-40~105℃). 5. Application Scenarios Low-voltage automotive devices, battery-powered portable devices, 1.8V core FPGA/MCU, 5G communication modules, industrial compact controllers, and scenarios requiring high-speed XIP program execution.