CY14B256K
Document History Page
Document Title: CY14B256K 256 Kbit (32K x 8) nvSRAM with Real Time Clock
Document Number:
Rev. | ECN | Orig. of Change | Submission | Description of Change | |||
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** | 425138 | TUP | See ECN | New data sheet | |||
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*A | 437321 | TUP | See ECN | Show data sheet on external Web | |||
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*B | 471966 | TUP | See ECN | Changed VIH(min) from 2.2V to 2.0V | |||
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| Changed tRECALL from 60 μs to 100 μs | |||
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| Changed Endurance from one million cycles to 500K cycles | |||
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| Changed Data Retention from 100 years to 20 years | |||
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| Added Soft Sequence Processing Time Waveform | |||
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| Updated Part Numbering Nomenclature and Ordering Information | |||
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| Added RTC Characteristics Table | |||
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| Added RTC Recommended Component Configuration | |||
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*C | 503277 | PCI | See ECN | Changed from “Advance” to “Preliminary” | |||
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| Changed the term “Unlimited” to “Infinite” | |||
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| Changed endurance from 500K cycles to 200K cycles | |||
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| Device operation: Tolerance limit changed from +20% to +15% in | |||
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| the | |||
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| Features Section and Operating Range Table | |||
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| Removed Icc1 values from the DC table for 25 ns and 35 ns | |||
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| industrial grade | |||
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| Changed VSWITCH(min) from 2.55V to 2.45V | |||
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| Added temperature specifications to data retention - 20 years at | |||
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| 55°C | |||
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| Updated Part Nomenclature Table and Ordering Information Table | |||
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*D | 597004 | TUP | See ECN | Removed VSWITCH(min) specification from AutoStore/Power Up RE- | |||
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| CALL table | |||
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| Changed tGLAX specification from 20 ns to 1 ns | |||
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| Added tDELAY(max) specification of 70 μs in the Hardware STORE | |||
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| Cycle table | |||
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| Removed tHLBL specification | |||
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| Changed tSS specification from 70 μs(min) to 70 μs(max) | |||
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| Changed VCAP(max) from 57 μF to 120 μF | |||
*E | 696097 | VKN | See ECN | Added footnote 7 related to |
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HSB | |||||||
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| Added footnote 8 related to INT pin | |||
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| Changed tGLAX to tGHAX | |||
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| Removed ABE bit from Interrupt register | |||
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*F | 1349963 | UHA/SFV | See ECN | Changed from Preliminary to Final | |||
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| Added Note 5 regarding the W bit in the Flag register | |||
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| Updated Ordering Information Table | |||
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*G | 2483006 | GVCH/PYRS | 05/05/08 | Changed tolerance from +15%, | |||
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| Changed Operating voltage range from | |||
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Document Number: | Page 26 of 28 |
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