The Infineon CY7C019V-25AXC is a dual-port asynchronous SRAM organized 128K x 9, giving 1.152 Mbit of volatile storage accessible from two independent ports. The 25 ns access time means each port can complete a read or write cycle within 25 ns, which sets the bus-turnaround margin in a shared-memory system — if the master clock runs faster than 40 MHz, you will need to insert wait states or move to a pipelined (NoBL) architecture. The 9-bit width per port is deliberate: byte-wide data plus a parity bit, a common arrangement in telecom line cards and packet buffers where error detection runs alongside the data path.
Supply and temperature — where it fits, where it does not
Runs on a 3V to 3.6V rail, typical for a 3.3V nominal supply, with a parallel interface that matches most 3.3V-logic controllers directly.
Package — 100-TQFP for a dual-port footprint
Lifecycle — obsolete, sourced to order
Infineon (formerly Cypress) lists this part as Obsolete. No factory last-time-buy window remains open. Procurement runs through independent distribution — we source new-old-stock and verified surplus inventory against an RFQ. There is no direct Infineon replacement announced for the CY7C019V-25AXC, so any substitution requires a pin-compatible second-source evaluation.