AT27BV020(2001) Просмотр технического описания (PDF) - Atmel Corporation

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AT27BV020
(Rev.:2001)

2-Megabit (256K x 8) Unregulated Battery-Voltage High Speed OTP EPROM

Atmel Corporation 

AT27BV020

AC Characteristics for Read Operation

VCC = 2.7V to 3.6V and 4.5V to 5.5V

Symbol Parameter

Condition

tACC(3)

tCE(2)

tOE(2)(3)

tDF(4)(5)

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

tOH

Note:

Output Hold from Address, CE or OE,

whichever occurred first

2,3,4,5. – See “AC Waveforms for Read Operation”.

-90

Min Max

90

90

50

40

0

AT27BV020

-12

Min Max

120

120

50

40

0

-15

Min Max

150

150

60

50

0

Units

ns

ns

ns

ns

ns

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

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