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Cypress 256K (32K x 8) CY62256 manual

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Table of contents for the manual

  • Page 1

    256K (32K x 8) S tatic RAM CY62256 Cypress Semicondu ctor Corporatio n • 3901 North Fi rst S treet • San Jose • CA 9 5134 • 408-943-2600 Document #: 38-0524 8 Rev . *B Revi sed Augus t 27, 2002 Features • High spee d: 55 ns and 70 ns • V olt age range: 4.5V–5 .5V operation • Low active power (70 n s, LL version ) — 275 mW (ma x.) [...]

  • Page 2

    CY62256 Docum ent #: 38 -05248 Rev . * B Page 2 of 1 1 Pin Configurat ions Maximum Ratings (Abov e wh ic h th e us efu l life ma y b e imp aire d. F or user gui de- lines, not teste d.) S torage T emperature ................. ........... ..... – 65 ° C to +150 ° C Ambien t T emperature with Power Appl ied ............ ................. ........[...]

  • Page 3

    CY62256 Docum ent #: 38 -05248 Rev . *B Page 3 of 1 1 I SB2 Automatic CE Power-down Current — CMOS Inpu ts Max. V CC , CE > V CC − 0.3V V IN > V CC − 0 .3V , or V IN < 0.3V , f = 0 15 1 5 mA L2 5 0 2 50 µ A LL 0.1 5 0.1 5 µ A Indust ’ l T emp Range LL 0.1 10 0.1 10 µ A Cap acit ance [4] Parameter Descr iption T est Condition s M[...]

  • Page 4

    CY62256 Docum ent #: 38 -05248 Rev . *B Page 4 of 1 1 Switching Characteri stics Over the Oper ating R ange [6 ] Parameter D escription CY62 256 − 55 CY62256 − 70 Unit Min. Ma x. Min. Max. Read Cycle t RC Read Cy cle T ime 55 70 ns t AA Address to Data V alid 55 70 ns t OHA Dat a Hold from Addres s Change 5 5 ns t ACE CE LOW to Data V alid 55 7[...]

  • Page 5

    CY62256 Docum ent #: 38 -05248 Rev . *B Page 5 of 1 1 Notes: 13. Addre ss valid pr ior to or co incident with CE trans ition LOW . 14. Data I/O is high imped ance if OE = V IH . 15. If CE goes HIGH simult aneously wit h WE HIGH, the ou tput remains in a h igh-impeda nce s tat e. Switching W aveforms (continued) 50% 50% DATA VALID t RC t ACE t DOE t[...]

  • Page 6

    CY62256 Docum ent #: 38 -05248 Rev . *B Page 6 of 1 1 Note: 16. During this per iod, th e I/Os are in outpu t state and i nput signa ls shoul d not be applied . Switching W aveforms (continued) DATA I/ O ADDR ESS t HD t SD t LZWE t SA t HA t AW t WC CE WE t HZWE DATA IN VALID Wri te Cy cle N o. 3 (WE Co nt roll ed , OE LOW) [10, 15] NOT E 1 6[...]

  • Page 7

    CY62256 Docum ent #: 38 -05248 Rev . *B Page 7 of 1 1 T ypical DC and AC Characteri stics 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 − 55 25 125 1.2 1.0 0.8 NORMALIZED t AA 120 100 80 60 40 20 0.0 1.0 2.0 3.0 4.0 OUTPUT SOURCE CURRENT (mA) SUPPLY VOLTAGE (V ) NORMALIZED SUPPLY CURRE NT vs. SUPPLY VOLTAGE NORMALI[...]

  • Page 8

    CY62256 Docum ent #: 38 -05248 Rev . *B Page 8 of 1 1 T ypical DC and AC Characteri stics (c ontinued) 3.0 2.5 2.0 1.5 1.0 0.5 0.0 1.0 2.0 3.0 4.0 NORMALIZED I PO SUPPL Y VOLTAG E (V ) TYPICAL POWER-ON CURRENT vs. SUPPLY VOLTAGE 30. 0 25. 0 20. 0 15. 0 10. 0 5.0 0 200 400 600 8 00 DELTA t (ns) AA CAPACITANCE (pF) TYPICAL ACCESS TIME CHANGE vs. OUTP[...]

  • Page 9

    CY62256 Docum ent #: 38 -05248 Rev . *B Page 9 of 1 1 Package Diagra ms 51-85017- A 28-lead (600 -mil) Molded DIP P15 51-85092- *B 28-lead (30 0-mil) SNC (Narrow Body) SN28[...]

  • Page 10

    CY62256 Docum ent #: 38 -05248 Rev . *B Page 10 of 1 1 © Cypress Semico nductor Corporati on, 2002. The information cont ained herein is su bject to change witho ut notice. Cypress S emico nductor Cor poration assumes no r esponsibility for the use of any ci rcuitry other th an circuitry embod ied in a Cypr ess Semiconductor pr oduct. Nor does it [...]

  • Page 11

    CY62256 Docum ent #: 38 -05248 Rev . *B Page 1 1 of 1 1 Docume nt Title : CY62256 256K (32K x 8) St a tic RAM Docume nt Number: 38-0 5248 REV . ECN NO. Issue Date Orig. of Change Description of Change ** 1 13454 03/06/02 MGN Change from Spec nu mber: 38-00 455 to 38-0 5248 Remo ve obso let e parts fr om ord eri ng inf o, stan dard ize f orma t *A 1[...]