The CY14B256LA-SP25XI can operate from -40°C to +85°C.
Use the VCC ramp-up and ramp-down rates specified in the datasheet to ensure data integrity during power-up and power-down. Also, use a capacitor on the VCC pin to filter out noise and ensure a clean power supply.
Store the device in a dry, cool place, away from direct sunlight and moisture. The recommended storage temperature range is -40°C to +30°C.
No, the CY14B256LA-SP25XI is not designed to operate in radiation-intensive environments. It does not have any radiation-hardened features.
The HOLD pin should be tied to VCC or left floating during device operation. Do not tie it to GND, as this can cause the device to malfunction.