Obsolete dual-port SRAM — sourcing the CY7C09389V-12AXCT
The CY7C09389V-12AXCT from Infineon Technologies is an obsolete dual-port synchronous SRAM, organized 64K x 18, with a 12 ns access time and a 50 MHz clock. The official lifecycle status is Obsolete, meaning the manufacturer has discontinued production.
Parametric profile — 64K x 18, 12 ns, 50 MHz
The 12 ns access time sets the read-cycle floor — the part can deliver data within 12 ns of the address being valid, which is the timing constraint for the bus controller. The 50 MHz clock frequency governs the synchronous write and read operations; at that rate, one word (18 bits) is transferred every 20 ns in a pipelined burst. The 1.152 Mbit density (64K words x 18 bits) is sized for moderate-depth FIFO or mailbox buffers in multiprocessor systems. The dual-port architecture allows two independent controllers to access the same memory array without arbitration logic — each port has its own address, data, and control lines, with the on-chip arbitration handling simultaneous writes to the same address.
Package and temperature grade
The Tape & Reel (TR) packaging is the standard for automated pick-and-place assembly.