What this NVSRAM is and where it fits
The Cypress CY14B116N-ZSP25XI is a 16 Mbit non-volatile SRAM (NVSRAM) that combines a fast SRAM core with on-chip non-volatile storage, so data is retained at power loss without a battery. Organized as 1M x 16 bits, it presents a parallel interface with a 25 ns access time, running from a 2.7 V supply. The 54-pin TSOP II package is surface-mount, and the part is rated for -40°C to 85°C, making it suitable for industrial control cabinets, factory-floor data loggers, and metering equipment where configuration or calibration data must survive a power cycle.
25 ns access time — what it means for the bus
The 25 ns access time sets the window for the memory controller to read or write data after asserting the address. The write cycle time is also 25 ns.
Non-volatile SRAM vs battery-backed SRAM
Unlike a standard SRAM that loses data on power-down, this NVSRAM stores the SRAM array into on-chip non-volatile cells when the supply drops below a threshold.
Lifecycle and sourcing reality
The CY14B116N-ZSP25XI is marked as end-of-life (EOL hot) in the supply chain. The part is available through independent distribution and surplus channels, sourced to order against an RFQ.
Supply and temperature — fit check
The supply is 2.7 V nominal. The industrial temperature range (-40°C to 85°C) covers most factory-floor and outdoor enclosure environments.