72 Mbit DDR II SRAM at 250 MHz — buffer memory for high-throughput designs
The Infineon CY7C1520KV18-250BZXC is a 72 Mbit synchronous DDR II SRAM organized as 2M x 36 bits, clocked at 250 MHz.
At 250 MHz, the DDR II interface transfers data on both clock edges, effectively doubling the data rate per pin. For a 36-bit-wide bus, that yields a peak bandwidth of roughly 2.25 GB/s. This matters when the SRAM sits between a high-speed ASIC or FPGA and a slower memory tier — the part keeps the pipeline fed without wait states.
2M x 36 organization — why 36 bits instead of 32
The 36-bit word width includes four parity or ECC bits per 32-bit data word, common in networking and storage applications where data integrity is checked inline. If your controller expects a 32-bit bus, the extra four bits can be left unused or repurposed for sideband signaling, but the physical bus is 36 bits wide.
Supply and temperature — fit for controlled environments
Not rated for automotive or outdoor deployment without active cooling or a wider-temperature variant.
165-ball LBGA — layout notes
The 165-ball LBGA measures 13x15 mm with a 1.0 mm ball pitch. This is a fine-pitch BGA requiring a multilayer PCB with microvias or blind vias for fanout. Reflow profiles follow standard lead-free (SnAgCu) profiles. The package is moisture-sensitive — store the reels dry per the MSL label on the reel.
Infineon lists the CY7C1520KV18-250BZXC as Active. No direct second-source is cited, but the base product number CY7C1520 covers multiple speed and temperature grades — verify pin-compatibility if cross-referencing within the family.