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AT27C020

2-megabit (256K x 8) OTP EPROM

Atmel Corporation 

AT27C020

9. AC Characteristics for Read Operation

Symbol

tACC(3)

tCE(2)

tOE(2)(3)

tDF(4)(5)

tOH

Parameter

Condition

Address to Output Delay

CE to Output Delay

OE to Output Delay

OE or CE High to Output Float,

Whichever Occurred First

CE = OE

= VIL

OE = VIL

CE = VIL

Output Hold from Address, CE or OE,

Whichever Occurred First

AT27C020

-55

-90

Min

Max

Min

Max

55

90

55

90

20

35

18

20

7

0

Units

ns

ns

ns

ns

ns

10. 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.

5

0570G–EPROM–12/07

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