28C64A-15L datasheet(3/8 Pages) MICROCHIP

3 / 8 page

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

OE = CE = VIL

CE to Output Delay

tCE

—

150

—

200

—

250

OE = VIL

OE to Output Delay

tOE

—70—80—

100

CE = VIL

CE or OE High to Output Float

tOFF

0500550

(Note 1)

Output Hold from Address, CE

or OE, whichever occurs ﬁrst.

tOH

0—0—0

—

(Note 1)

Endurance

—

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

VIH

VIL

VIH

VIL

VIH

VIL

Data

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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