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Cypress CY7C185 manual

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Table of contents for the manual

  • Page 1

    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 —1 5 n s • Fast t DOE • Lo w active po wer —7 1 5 m W • L ow st a n db y p ow e r —2 2 0 m W • CMOS f or optim um speed/p ower • E as y[...]

  • Page 2

    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 .... .. .. ... .. ... .. ... .. .. ... .. ..... ... .. ... .. –55 ° C to +1 2 5 ° C S[...]

  • Page 3

    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., I OL = 8. 0 mA 0.4 0. 4 V V IH Input HIGH V olt age 2.2 V C[...]

  • Page 4

    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. Max . Min. Max. Min. Max. Min. Max. Unit READ CYCLE t RC Re ad Cycl e Time 15 20 25 35 ns t AA Ad dress to Data V alid 15 20 25 35 ns t OHA Data Hol d fr om Addres s Change 3 5 5 5 ns t ACE 1 CE 1[...]

  • Page 5

    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 . CE 1 and WE mus[...]

  • Page 6

    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. Switching W a vefor ms (cont in ued) t WC t AW t SA t HA t HD t SD t SCE1 WE DATA I/O ADDRESS[...]

  • Page 7

    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. 0 1.6 1.4 1.2 1.0 0.8 –55 25 125 N ORMALIZ ED t AA 120 100 80 60 40 20 0.0 1. 0 2.0 3.0 4. 0 S[...]

  • Page 8

    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 H L X D a ta In Wri te L H H H High Z Dese lect Address Designators Address Name Address Functi on Pin Number A4 X3 2 A5 X4 3 A6 X5 4 A7 X6 5 A8 X7 6[...]

  • Page 9

    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[...]

  • Page 10

    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. Nor does it con vey or imply any lice nse under patent o[...]