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Cypress STK11C68 - page 1
STK1 1C68 64 Kbit (8K x 8) Sof tS tore nvSRAM Cypress Semiconducto r Corporation • 198 Champion Court • San Jose , CA 95134-1709 • 408-943-2600 Document Number: 001-50638 Rev . ** Revised January 30, 2009 Features ■ 25 ns, 35 ns, and 45 ns acce ss times ■ Pin compatible with industry standard SRAMs ■ Software initiated nonvolatile STORE ...
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Cypress STK11C68 - page 2
STK1 1C68 Document Number: 001-50638 Rev . ** Page 2 of 16 Pin Configurations Figure 1. Pin Diagram - 28-P in SOIC/DIP and 28-Pin LLC Pin Definitions Pin Name Alt IO T ype Description A 0 –A 12 Input Address In pu ts. Used to select one of the 8,192 bytes of the nvSRAM. DQ 0 -DQ 7 Input or Output Bidirectional Data IO Lines . Used as in put or ou ...
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Cypress STK11C68 - page 3
STK1 1C68 Document Number: 001-50638 Rev . ** Page 3 of 16 Device Operation The STK1 1C68 is a versatile memory chip that provides several modes of operation. The STK16C 88 can operate as a standard 8K x 8 SRAM. A 8K x 8 array of nonvolatile storage elements shadow the SRAM. SRAM data can be copied n onvolatile memory or nonvolatile data can be rec ...
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Cypress STK11C68 - page 4
STK1 1C68 Document Number: 001-50638 Rev . ** Page 4 of 16 average current drawn by the STK1 1C68 de pends on the following items: ■ The duty cycle of chip enable ■ The overall cycle rate for accesses ■ The ratio of Reads to W ri tes ■ CMOS versus TTL input levels ■ The operating temp erature ■ The V CC level ■ IO loading Best Practic ...
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Cypress STK11C68 - page 5
STK1 1C68 Document Number: 001-50638 Rev . ** Page 5 of 16 Maximum Ratin gs Exceeding maximum ratings may shorten the useful life of the device. These user g uidelines are not tested. S torage T emperature ............. ... .. ... ............ –65 ° C to +150 ° C T emperature under bias ............... .............. . –55 ° C to +125 ° C S ...
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Cypress STK11C68 - page 6
STK1 1C68 Document Number: 001-50638 Rev . ** Page 6 of 16 Cap acit ance In the following table, the capacitance parameters are listed. [3] Parameter Description T est Cond ition s Max Unit C IN Input Capacitance T A = 25 ° C, f = 1 MHz, V CC = 0 to 3.0V 8p F C OUT Output Capacitance 7p F Thermal Resist ance In the following table, the thermal res ...
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Cypress STK11C68 - page 7
STK1 1C68 Document Number: 001-50638 Rev . ** Page 7 of 16 AC Switching Characteristics SRAM Read Cycle Parameter Description 25 ns 35 ns 45 ns Unit Min Max Min Max Min Max Cypress Parameter Alt t ACE t ELQV Chip Enable Access Time 25 35 45 ns t RC [4] t AVAV, t ELEH Read Cycle T ime 25 35 45 ns t AA [5] t AV Q V Address Access T ime 25 35 45 ns t ...
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Cypress STK11C68 - page 8
STK1 1C68 Document Number: 001-50638 Rev . ** Page 8 of 16 SRAM Writ e Cycle Parameter Descriptio n 25 ns 35 ns 45 ns Unit Min Max Min Max Min Max Cypress Parameter Alt t WC t AVAV Write Cycle T i me 25 35 45 ns t PWE t WL WH, t WLEH Write Pulse Width 20 25 30 ns t SCE t EL WH, t ELEH Chip Enable T o End of Write 20 25 30 ns t SD t DVWH, t DVEH Dat ...
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Cypress STK11C68 - page 9
STK1 1C68 Document Number: 001-50638 Rev . ** Page 9 of 16 AutoStore INHIBIT or Power Up RECALL Parameter Alt Description STK1 1C68 Unit Min Max t HRECALL [9] t RESTORE Power up RECALL Duration 550 μ s t STORE t HLHZ STORE Cycle Duration 10 ms V SWITCH Low V oltage T rig ger Level 4.0 4.5 V V RESET Low V oltage Reset Level 3.6 V Switching W avefor ...
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Cypress STK11C68 - page 10
STK1 1C68 Document Number: 001-50638 Rev . ** Page 10 of 16 Sof tware Controlled ST ORE/RECALL Cycle The software controlled ST ORE/RECALL cycle follows. [10, 1 1] Parameter Al t Description 25 ns 35 ns 45 ns Unit Min Max Min Max Min Max t RC t AVAV STORE/RECALL Initiation Cycle T ime 25 35 45 ns t SA [10] t A VEL Address Setup T ime 0 0 0 ns t CW ...
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Cypress STK11C68 - page 11
STK1 1C68 Document Number: 001-50638 Rev . ** Page 1 1 of 16 Ordering Information Spee d ( ns ) Ordering Code Package Diagram Package T ype Operatin g Ra n ge 25 STK1 1C68-SF25TR 001-85058 28-Pin SOIC (330 mil) Commercial STK1 1C68-SF25 001-85058 28-Pin SOIC (330 mil) STK1 1C68-SF25ITR 001-85058 28-Pin SOIC (330 mil) Industrial STK1 1C68-SF25I 001- ...
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Cypress STK11C68 - page 12
STK1 1C68 Document Number: 001-50638 Rev . ** Page 12 of 16 45 STK1 1C68-SF45TR 001-85058 28-Pin SOIC (330 mil) Commercial STK1 1C68-SF45 001-85058 28-Pin SOIC (330 mil) STK1 1C68-C45 001-51695 28-Pin CDIP (300 mil) STK1 1C68-L45 001-51696 28-Pin LCC (350 mil) STK1 1C68-SF45ITR 001-85058 28-Pin SOIC (330 mil) Industrial STK1 1C68-SF45I 001-85058 28 ...
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Cypress STK11C68 - page 13
STK1 1C68 Document Number: 001-50638 Rev . ** Page 13 of 16 Package Diagrams Figure 1 1. 28-Pin (330 Mil) SOIC (51-85058) 51-85058 *A [+] Feedback ...
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Cypress STK11C68 - page 14
STK1 1C68 Document Number: 001-50638 Rev . ** Page 14 of 16 Figure 12. 28-Pin (300 Mil) Side Braze DIL (001-51695) Package Diagrams (continued) 001-51695 ** [+] Feedback ...
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Cypress STK11C68 - page 15
STK1 1C68 Document Number: 001-50638 Rev . ** Page 15 of 16 Figure 13. 28-Pad (350 Mil) LCC (0 01-51696) Package Diagrams (continued) 1. A L L D IM E N S IO N A R E IN I NC H E S A ND M ILL IM ET ER S [MIN /M A X] 2. JEDEC 95 O UTLINE# MO -041 3. PACKAGE WEIGHT : TBD 001-51696 ** [+] Feedback ...
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Cypress STK11C68 - page 16
Document Number: 001-50638 Rev . ** Revised Janua ry 30, 2009 Page 16 of 16 AutoS tore and Qua ntumTr ap are registered tr ademarks of Cypress Se miconductor Corpor ation. All produ cts and comp any names mentio ned in this docum ent may be the trade marks of t heir respe ctive holders. STK1 1C68 © Cypress Semiconducto r Corporation, 2 009. The in ...
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