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CY14B256KA Datasheet(PDF) 1 Page - Cypress Semiconductor |
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CY14B256KA Datasheet(HTML) 1 Page - Cypress Semiconductor |
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1 / 27 page  CY14B256KA 256-Kbit (32 K × 8) nvSRAM with Real Time Clock Cypress Semiconductor Corporation • 198 Champion Court • San Jose , CA 95134-1709 • 408-943-2600 Document #: 001-55720 Rev. *C Revised January 17, 2011 256 Kbit (32K x 8) nvSRAM with Real Time Clock Features ■ 256-Kbit nonvolatile static random access memory (nvSRAM) ❐ 25 ns and 45 ns access times ❐ Internally organized as 32 K × 8 (CY14B256KA) ❐ Hands off automatic STORE on power-down with only a small capacitor ❐ STORE to QuantumTrap nonvolatile elements is initiated by software, hardware, or AutoStore on power-down ❐ RECALL to SRAM initiated on power-up or by software ■ High reliability ❐ Infinite Read, Write, and RECALL cycles ❐ 1 million STORE cycles to QuantumTrap ❐ 20 year data retention ■ Real time clock (RTC) ❐ Full-featured real time clock ❐ Watchdog timer ❐ Clock alarm with programmable interrupts ❐ Capacitor or battery backup for RTC ❐ Backup current of 0.35 uA (Typ) ■ Industry standard configurations ❐ Single 3 V +20%, -10% operation ❐ Industrial temperature ❐ 48-pin shrink small-outline package (SSOP) ❐ Pb-free and Restriction of hazardous substances (RoHS) compliant Functional Description The Cypress CY14B256KA combines a 256-Kbit nonvolatile static RAM with a full featured real time clock in a monolithic integrated circuit. The embedded nonvolatile elements incor- porate QuantumTrap technology producing the world’s most reliable nonvolatile memory. The SRAM is read and written an infinite number of times, while independent nonvolatile data resides in the nonvolatile elements. The real time clock function provides an accurate clock with leap year tracking and a programmable, high accuracy oscillator. The alarm function is programmable for periodic minutes, hours, days, or months alarms. There is also a programmable watchdog timer for process control. STORE/ RECALL CONTROL POWER CONTROL SOFTWARE DETECT STATIC RAM ARRAY 512 X 512 QuantumTrap 512 X 512 STORE RECALL COLUMN IO COLUMN DEC OE CE WE HSB VCC VCAP A14 - A0 A0 A1 A2 A3 A4 A10 A5 A6 A7 A8 A9 A12 A13 A14 DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 RTC MUX A14 - A0 xout xin INT VRTCbat VRTCcap A11 Logic Block Diagram [+] Feedback |
Similar Part No. - CY14B256KA_11 |
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Similar Description - CY14B256KA_11 |
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