Infineon no longer manufactures this specific variant in production volumes.
12 ns access time — the bus margin decision
In a system with a 66 MHz or slower memory controller, it leaves comfortable margin for propagation delay across the PCB traces and any buffer logic. If your controller expects a 10 ns or faster part, the 12 ns rating may eat into setup timing — check the controller's tRC and tAA requirements against the board's signal-integrity budget before committing the BOM.
Package and supply — layout constraints
The parallel interface means 16 data lines plus address and control signals; route them with matched trace lengths if the bus runs above 50 MHz to avoid skew-induced setup violations.
The volatile nature means any data held during a power loss is gone — system designs must include a battery-backed supply or a supercapacitor hold-up circuit if retention across power cycles is required.