Dual-port SRAM for shared-memory arbitration
The Infineon CY7C144AV-25AC is a 64Kbit (8K x 8) dual-port asynchronous SRAM with a 25 ns access time, designed for systems where two independent bus masters need simultaneous read/write access to a shared memory array without contention logic.
Lifecycle reality and sourcing path
No official pin-compatible successor is recorded in the lifecycle entry.
What the 25 ns access time means for bus timing
The 25 ns access time sets the window from address assertion to valid data on the output bus. For a system running a 40 MHz bus clock with a 25 ns period, the memory leaves zero margin for address decoding and trace delay — this part is best suited to slower bus architectures or where wait states are acceptable.
Housed in a 64-LQFP with a 14x14 mm body (supplier device package 64-TQFP), the CY7C144AV-25AC requires a surface-mount reflow profile compatible with JEDEC MSL level 3 or better. The 0.8 mm pitch allows two-layer PCB routing for the address and data buses, but decoupling capacitors should sit within 5 mm of each VDD pin to keep supply noise below 100 mV peak-to-peak at 3.3 V. The 8-bit wide data bus and 13-bit address bus (for 8K words) route to two separate port connectors on the board; the dual-port architecture eliminates external arbitration logic but the PCB must isolate the two port's control signals to avoid cross-talk at the 25 ns switching edge.