AT27LV256A datasheet(5/9 Pages) ATMEL

5 / 9 page

AC Characteristics for Read Operation (VCC = 3.0V to 3.6V and 4.5V to 5.5V)

AT27LV256A

-70

-90

-12

-15

Symbol

Parameter

Condition

Min

Max

Min

Max

Min

Max

Min

Max

Units

tACC (3)

Address to Output Delay

CE = OE = VIL

120

150

tCE (2)

CE to Output Delay

OE = VIL

120

150

tOE (2, 3)

OE to Output Delay

CE = VIL

tDF (4, 5)

OE or CE High to Output Float,

whichever occurred first

tOH

Output Hold from Address, CE or

OE, whichever occurred first

Notes:

2, 3, 4, 5. - see AC Waveforms for Read Operation.

AC Waveforms for Read Operation

(1)

Notes: 1. Timing measurement references are 0.8V and 2.0V.

Input AC drive levels are 0.45V and 2.4V, unless

otherwise specified.

2. OE may be delayed up to tCE - tOE after the falling edge

of CE without impact on tCE .

3. OE may be delayed up to tACC - tOE after the

address is valid without impact on tACC .

4. This parameter is only sampled and is not 100% tested.

5. Output float is defined as the point when data is no longer

driven.

AT27LV256A

3-79

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