AT27C040(2007) View Datasheet(PDF) - Atmel Corporation

Part Name

Description

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AT27C040
(Rev.:2007)

4-Megabit (512K x 8) OTP EPROM

Atmel Corporation 

AT27C040

9. AC Characteristics for Read Operation

Symbol

Parameter

Condition

tACC(1)

tCE(1)

Address to Output Delay

CE to Output Delay

CE = OE

= VIL

OE = VIL

tOE(1)

tDF(1)

OE to Output Delay

CE = VIL

OE or CE High to Output Float, Whichever Occurred First

tOH

Output Hold from Address, CE or OE, Whichever Occurred

First

Note: 1. See AC Waveforms for Read Operation

10. AC Waveforms for Read Operation(1)

AT27C040

-70

-90

Min

Max

Min

Max

70

90

70

90

30

35

20

20

0

0

Units

ns

ns

ns

ns

ns

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

0189H–EPROM–12/07

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