Instruction/ maintenance manual of the product CY7C185 Cypress
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8K x 8 Static RA M f ax id : 1013 CY7C 185 Cypress Sem iconductor Corp oratio n • 3 901 Nor th First St reet • San Jos e • CA 95134 • 408-9 43-2600 Au g ust 12 , 1998 Features • High speed .
CY7C185 2 Maxim um Ratings (Abo v e which the use ful lif e m a y be impaire d. F or user gui de- li nes , not tes ted .) Stor age T emperat ure ... .. .. ..... .. ..... . ..... ..... ... –65 ° C to +1 5 0 ° C Ambient T empera ture with P owe r A pp li e d .
CY7C185 3 Electric al Charact e ristics Ov er the Oper ati ng Rang e (conti nue d) 7C185–25 7C185- 35 Pa r a m e t e r Descript ion T est C ond ition s Min. Max. Min. Max. Unit V OH Output HI G H V olt age V CC = M in., I OH = –4.0 mA 2.4 2. 4 V V OL Output LO W V olt age V CC = M in.
CY7C185 4 Switching Charac teris t ics Ov e r the Operat i ng Range [5 ] 7C185–15 7 C185–20 7 C185–25 7C185–35 Pa r am e te r Descrip t ion Mi n.
CY7C185 5 Switching W a vefor ms 9. Dev i ce is co ntinuousl y selec ted. OE , C E 1 = V IL . CE 2 = V IH . 10. WE is HIGH for read cyc le. 11. Data I/O i s High Z i f OE = V IH , CE 1 = V IH , W E = V IL , or CE 2 =V IL . 12. The inter nal w rite time of the memor y is defined by t he ov er lap of CE 1 LOW , CE 2 HIGH and WE LO W .
CY7C185 6 Notes: 14. The mi nimum wr ite cy cle ti me for wr ite cy cle #3 (W E contr olled, OE LOW) is the sum of t HZWE and t SD . 15. If CE 1 g oes HIGH or CE 2 goe s LOW simulta neous ly wi th WE HIG H, the output remain s in a hi gh-im peda nce state.
CY7C185 7 T ypical DC a nd AC Characte ris ti cs –55 25 125 1.2 1.0 0.8 OUTPUT SOURCE CURRENT (mA) AMBI ENT T EMPERA TURE ( ° C) 0.6 0.4 0.2 0.0 NOR MALIZ ED I , I CC I SB V CC =5 . 0V V IN =5 . 0V I CC SB 1.2 1.4 1.0 0.6 0.4 0.2 4.0 4. 5 5.0 5. 5 6.
CY7C185 8 Docum ent #: 38–00037 –K T ruth T a ble CE 1 CE 2 WE OE Input /Output Mode H X X X High Z D e s el e ct /Powe r- D own X L X X High Z De s el e ct /Powe r- D ow n L H H L Data Out Read L.
CY7C185 9 Package Di ag r am s 51-85014-B 28-Lead ( 300-Mil) M olded DIP P21 28-Lead (300 -Mil) Mol ded SO IC S21 51-85026-A.
CY7C185 © Cypres s Semiconductor C orporation, 1998. T he information contai ned herein is subj ec t to change without notice. Cy press Semico ndu ctor Corporation assumes no r es ponsi bi lity fo r the use of any circuit r y other than circuitry embodied in a Cypress Semiconduc tor product.
An important point after buying a device Cypress CY7C185 (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 CY7C185 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 CY7C185 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Cypress CY7C185 you will learn all the available features of the product, as well as information on its operation. The information that you get Cypress CY7C185 will certainly help you make a decision on the purchase.
If you already are a holder of Cypress CY7C185, 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 CY7C185.
However, one of the most important roles played by the user manual is to help in solving problems with Cypress CY7C185. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Cypress CY7C185 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
