Instruction/ maintenance manual of the product STK16C88 Cypress Semiconductor
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STK16C88 256 Kbit (32K x 8) AutoS tore+ nvSRAM Cypress Semiconducto r Corporation • 198 Champion Court • San Jose , CA 95134-1709 • 408-943-2600 Document Number: 001-50595 Rev .
STK16C88 Document Number: 001-50595 Rev . ** Page 2 of 14 Pin Configurations Figure 1. Pin Diagram - 28-Pin PDIP T able 1. Pin Definitions - 28-Pin PDIP Pin Name Alt IO T ype Description A 0 –A 14 Input Address In pu ts. Used to select one of the 32,768 bytes of the nvSRAM.
STK16C88 Document Number: 001-50595 Rev . ** Page 3 of 14 Device Operation The AutoS tore+ STK16C88 is a fast 32K x 8 SRAM that does not lose its data on power down. The data is preserved in inte gral QuantumTrap nonvolatile storage elements when power is lost.
STK16C88 Document Number: 001-50595 Rev . ** Page 4 of 14 Hardware Protect The STK16C88 offers hardware protectio n against inadve rtent STORE operation and SRAM WRITEs during low voltage conditions. When V CAP <V SWITCH , all externally i nitiated STORE operations and SRAM WRITEs are inhibited.
STK16C88 Document Number: 001-50595 Rev . ** Page 5 of 14 T able 2. Software STOR E/RECALL Mode Selecti on CE WE A 13 – A 0 Mode IO Notes L H 0x0E38 0x31C7 0x03E0 0x3C1F 0x303F 0x0FC0 Read SRAM Read.
STK16C88 Document Number: 001-50595 Rev . ** Page 6 of 14 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 .
STK16C88 Document Number: 001-50595 Rev . ** Page 7 of 14 Cap acit ance In the following table, the capacitance parameters are listed. [4] Parameter Description T est Condi tions Max Unit C IN Input Capacit ance T A = 25 ° C, f = 1 MHz, V CC = 0 to 3.
STK16C88 Document Number: 001-50595 Rev . ** Page 8 of 14 AC Switching Characteristics T able 3. SRAM Read Cycle Parameter Description 25 ns 45 ns Unit Min Max Min Max Cypress Parameter Alt t ACE t EL.
STK16C88 Document Number: 001-50595 Rev . ** Page 9 of 14 T able 4. SRAM Write Cycle Parameter Description 25 n s 45 ns Unit Min Max Min Max Cypress Parameter Alt t WC t AVAV Write Cycle T ime 25 45 n.
STK16C88 Document Number: 001-50595 Rev . ** Page 10 of 14 AutoS tore or Power Up RECALL Parameter Alt Description STK16C88 Unit Min Max t HRECALL [10] t RESTORE Power up RECALL Duration 550 μ s t STORE t HLHZ STORE Cycle Duration 10 ms t stg [4, 6] Power-down AutoStore Slew T ime to Ground 500 ns V RESET Low V oltage Reset Leve l 3.
STK16C88 Document Number: 001-50595 Rev . ** Page 1 1 of 14 Sof tware Controlled STORE/RECALL Cycle The software controlled ST ORE/RECALL cycle follows.
STK16C88 Document Number: 001-50595 Rev . ** Page 12 of 14 Ordering Information Spe e d (ns) Ordering Code Package Diagra m Package T ype Operating Range 25 STK16C88-WF25 51-85017 28-pin PDIP Commerci.
STK16C88 Document Number: 001-50595 Rev . ** Page 13 of 14 Package Diagrams Figure 1 1. 28-Pin (600 Mil) PDIP (51-85017 ) 51-85127-*A 51-85017- *B [+] Feedback.
Document Number: 001-50595 Rev . ** Revised January 29, 20 09 Page 14 of 14 AutoStore and QuantumT rap are reg istered trademarks of Cy press Semiconductor Corp oration. All product s and compan y names mentioned in thi s docum ent may be the trademarks of thei r respective holders.
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