4 Mbit SRAM for low-power cache and buffer memory
The Infineon CY62147DV18LL-55BVI is a 4 Mbit (256K x 16) asynchronous SRAM from the MoBL2™ series, organized for 16-bit-wide data buses and operating from a 1.65 V supply rail. With a 55 ns access time and matching 55 ns write cycle time (word and page modes), this part fits applications where the bus master needs deterministic read/write latency without refresh overhead — typical in industrial controllers, telecom line cards, and battery-backed cache buffers.
The 1.65 V supply voltage (minimum) allows direct interface with 1.8 V logic families and low-voltage DSPs or FPGAs, reducing the need for external level shifters on the address and data bus.
Housed in a 48-ball VFBGA (Very Fine-pitch Ball Grid Array), the package footprint is 0.50 mm ball pitch — the pcb_layout_engineer should budget a 4-layer board for fan-out of the inner balls, with micro-vias or through-vias depending on the layer stack.
The MoBL2™ series is the low-power SRAM family from Infineon (formerly Cypress); the CY62147 designates the 4 Mbit density in the 256K x 16 organization.