Instruction/ maintenance manual of the product STK11C68 Cypress Semiconductor
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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 .
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.
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.
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 acce.
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 .
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.
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.
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 .
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.
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.
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.
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.
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.
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.
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 IN C H ES AN D M IL LIM E TE R S [M IN /M A X] 2.
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.
An important point after buying a device Cypress Semiconductor STK11C68 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
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If you already are a holder of Cypress Semiconductor STK11C68, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Cypress Semiconductor STK11C68.
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