CY14B256KA-SP45XI Infineon

Please note that Cypress is an Infineon Technologies Company. The document following this cover page is marked as Cypress document as this is the company that originally developed the product. Please note that Infineon will continue to offer the product to new and existing customers as part of the Infineon product portfolio. Continuity of document content The fact that Infineon offers the following product as part of the Infineon product portfolio does not lead to any changes to this document. Future revisions will occur when appropriate, and any changes will be set out on the document history page. Continuity of ordering part numbers Infineon continues to support existing part numbers. Please continue to use the ordering part numbers listed in the datasheet for ordering. www.infineon.comCY14B256KA 256-Kbit (32 K 8) nvSRAM with Real Time Clock 256-Kbit (32 K 8) nvSRAM with Real Time Clock Industry standard configurations Features Single 3 V +20%, 10% operation 256-Kbit nonvolatile static random access memory (nvSRAM) Industrial temperature 25 ns and 45 ns access times 48-pin shrink small-outline package (SSOP) Internally organized as 32 K 8 (CY14B256KA) Pb-free and Restriction of hazardous substances (RoHS) Hands off automatic STORE on power-down with only a small compliant capacitor Functional Description STORE to QuantumTrap nonvolatile elements is initiated by software, hardware, or AutoStore on power-down The Cypress CY14B256KA combines a 256-Kbit nonvolatile RECALL to SRAM initiated on power-up or by software static RAM with a full featured real time clock in a monolithic High reliability integrated circuit. The embedded nonvolatile elements Infinite Read, Write, and RECALL cycles incorporate QuantumTrap technology producing the worlds 1 million STORE cycles to QuantumTrap most reliable nonvolatile memory. The SRAM is read and written 20 year data retention an infinite number of times, while independent nonvolatile data resides in the nonvolatile elements. Real time clock (RTC) The real time clock function provides an accurate clock with leap Full-featured real time clock year tracking and a programmable, high accuracy oscillator. The Watchdog timer alarm function is programmable for periodic minutes, hours, Clock alarm with programmable interrupts days, or months alarms. There is also a programmable watchdog Capacitor or battery backup for RTC timer for process control. Backup current of 0.35 A (Typ) For a complete list of related documentation, click here. Logic Block Diagram Logic Block Diagram V V CC CAP QuantumTrap 512 X 512 V RTCbat POWER A 5 STORE CONTROL V RTCcap A 6 A 7 RECALL STORE/ A STATIC RAM 8 RECALL HSB ARRAY A 9 CONTROL A 512 X 512 11 A 12 A 13 SOFTWARE A 14 A - A 14 DETECT 0 DQ COLUMN IO 0 DQ 1 COLUMN DEC DQ 2 x out DQ x 3 RTC in INT DQ 4 DQ A A A A A A 5 0 1 2 3 4 10 DQ 6 DQ 7 A - A MUX 14 0 OE CE WE Cypress Semiconductor Corporation 198 Champion Court San Jose, CA 95134-1709 408-943-2600 Document Number: 001-55720 Rev. *I Revised November 14, 2014 INPUT BUFFERS ROW DECODER