Instruction/ maintenance manual of the product STK12C68-5 Cypress
Go to page of 18
STK12C68-5 (SMD5962-94599) 64 Kbit (8K x 8) AutoS tore nvSRAM Cypress Semiconductor Corpora tion • 198 Champion Court • San Jose , CA 95134-1709 • 408-943-2600 Document Number: 001-51026 Rev .
STK12C68-5 (S MD5962-94599) Document Number: 001-51026 Rev . ** Page 2 of 18 Pinout s Pin Definitions Pin Name Alt IO T y p e Description A 0 –A 12 Input Address Inputs . Used to select one of the 8,192 bytes of the nvSRAM. DQ 0 -DQ 7 Input or Outpu t Bidirectiona l Data IO Lines .
STK12C68-5 (S MD5962-94599) Document Number: 001-51026 Rev . ** Page 3 of 18 Device Operation The STK12C68-5 nvSRAM is made up of two functional compo- nents paired in the same physical cell. These ar e an SRAM memory cell and a nonvolatile QuantumTrap cell.
STK12C68-5 (S MD5962-94599) Document Number: 001-51026 Rev . ** Page 4 of 18 Figure 4. Aut oStore In hibit Mode If the power supply drops fast er than 20 us/volt before Vcc reaches V SWITCH , then a 2.2 ohm resistor must be connected between V CC and the system supply to avoid mome ntary excess of current between V CC and V CAP .
STK12C68-5 (S MD5962-94599) Document Number: 001-51026 Rev . ** Page 5 of 18 4. Read address 0x1FFF , V ali d READ 5. Read address 0x10F 0, V alid READ 6. Read address 0x0F0E, Initiate RECALL cycle Internally , RECALL is a two step procedure. First, the SRAM data is cleared; then, the nonvo latile information is transferred into the SRAM cells.
STK12C68-5 (S MD5962-94599) Document Number: 001-51026 Rev . ** Page 6 of 18 Best Practices nvSRAM products have been used e ffectively for over 15 years.
STK12C68-5 (S MD5962-94599) Document Number: 001-51026 Rev . ** Page 7 of 18 Maximum Ratin gs Exceeding maximum ratings may shorten the useful life of the device. These user guid elines are not tested. S torage T emperature ................ ..........
STK12C68-5 (S MD5962-94599) Document Number: 001-51026 Rev . ** Page 8 of 18 Dat a Retention and Endurance Parameter Descriptio n Min Unit DA T A R Data Retention 100 Y ears NV C Nonvolatile STORE Operations 1,000 K Cap acit ance In the following table, the capacitance parameters are listed.
STK12C68-5 (S MD5962-94599) Document Number: 001-51026 Rev . ** Page 9 of 18 AC Switching Characteristics SRAM Read Cycle Parameter Description 35 ns 55 ns Unit Min Max Min Max Cypress Parameter Alt t.
STK12C68-5 (S MD5962-94599) Document Number: 001-51026 Rev . ** Page 10 of 18 SRAM Write Cycle Parameter Descriptio n 35 ns 55 ns Unit Min Max Min Max Cypress Parameter Alt t WC t AVAV W rite Cycle T .
STK12C68-5 (S MD5962-94599) Document Number: 001-51026 Rev . ** Page 1 1 of 18 AutoS tore or Power Up RECALL Parameter Alt Description STK12C68-5 Unit Min Max t HRECALL [13] t REST ORE Power up RECALL.
STK12C68-5 (S MD5962-94599) Document Number: 001-51026 Rev . ** Page 12 of 18 Sof tware Controlled STORE/RECALL Cycle The software controlled ST ORE/RECALL cycle follows.
STK12C68-5 (S MD5962-94599) Document Number: 001-51026 Rev . ** Page 13 of 18 Hardware STORE Cycle Parameter Alt Description ST K12C68-5 Unit Min Max t STORE [9, 14] t HLHZ STORE Cycle Duration 10 ms .
STK12C68-5 (S MD5962-94599) Document Number: 001-51026 Rev . ** Page 14 of 18 S peed: 35 - 35 ns 55 - 55 ns Package: C = Ceramic 28-pin 300 mil DIP (gold le ad finish) Part Numbering Nomen clature STK.
STK12C68-5 (S MD5962-94599) Document Number: 001-51026 Rev . ** Page 15 of 18 Ordering Information Spee d ( ns ) Ordering Code Package Diagram Package T ype Operating Ran ge 35 STK12C68-5C35 M 001-516.
STK12C68-5 (S MD5962-94599) Document Number: 001-51026 Rev . ** Page 16 of 18 Package Diagrams Figure 15. 28-Pin (300-Mil) Side Braze DIL (001-51 695) 001-51695 ** [+] Feedback.
STK12C68-5 (S MD5962-94599) Document Number: 001-51026 Rev . ** Page 17 of 18 Figure 16. 28-Pad (350-Mil) LCC (001-51696) Package Diagrams (continued) 1. A L L D IM E N S IO N AR E IN IN CH E S AN D M ILLIM E TE R S [M IN /M A X] 2. JEDEC 95 O UTLINE# M O-041 3.
Document Number: 001-51026 Rev . ** Revised March 02, 2009 Page 18 of 18 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 document may be the trademarks of thei r respective holders.
An important point after buying a device Cypress STK12C68-5 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Cypress STK12C68-5 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Cypress STK12C68-5 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Cypress STK12C68-5 you will learn all the available features of the product, as well as information on its operation. The information that you get Cypress STK12C68-5 will certainly help you make a decision on the purchase.
If you already are a holder of Cypress STK12C68-5, 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 STK12C68-5.
However, one of the most important roles played by the user manual is to help in solving problems with Cypress STK12C68-5. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Cypress STK12C68-5 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
