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28C64A-25ITS Datasheet(PDF) 3 Page - Microchip Technology |
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28C64A-25ITS Datasheet(HTML) 3 Page - Microchip Technology |
3 / 8 page © 1996 Microchip Technology Inc. DS11109H-page 3 28C64A TABLE 1-3: READ OPERATION AC CHARACTERISTICS FIGURE 1-1: READ WAVEFORMS AC Testing Waveform: VIH = 2.4V; VIL = 0.45V; VOH = 2.0V; VOL = 0.8V Output Load: 1 TTL Load + 100 pF Input Rise and Fall Times: 20 ns Ambient Temperature: Commercial (C): Tamb = 0˚C to +70˚C Industrial (I): Tamb = -40˚C to +85˚C Parameter Symbol 28C64A -15 28C64A -20 28C64A -25 Units Conditions Min Max Min Max Min Max Address to Output Delay tACC — 150 — 200 — 250 ns OE = CE = VIL CE to Output Delay tCE — 150 — 200 — 250 ns OE = VIL OE to Output Delay tOE —70—80— 100 ns CE = VIL CE or OE High to Output Float tOFF 0500550 70 ns (Note 1) Output Hold from Address, CE or OE, whichever occurs first. tOH 0—0—0 — ns (Note 1) Endurance — 1M — 1M — 1M — cycles 25 °C, Vcc = 5.0V, Block Mode (Note 2) Note 1: Not 100% tested. 2: This parameter is not tested but guaranteed by characterization. For endurance estimates in a specific appli- cation, please consult the Total Endurance Model which can be obtained on our BBS or website. Address CE VIH VIL VIH VIL VIH VIL OE Data WE VOH VOL VIH VIL Address Valid High Z Valid Output tACC (1) tOFF is specified for OE or CE, whichever occurs first (2) OE may be delayed up to t CE - t OE after the falling edge of CE without impact on tCE (3) This parameter is sampled and is not 100% tested High Z tOH tOFF(1,3) Notes: tOE(2) tCE(2) |
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