AT49F040T datasheet(6/12 Pages) ATMEL

Part #	AT49F040T

Description	4-Megabit (512K x 8) 5-volt Only CMOS Flash Memory

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Manufacturer	ATMEL [ATMEL Corporation]

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AT49F040/040T

6

AC Read Waveforms(1)(2)(3)(4)

Notes:

1.

CE may be delayed up to t

ACC - tCE after the address transition without impact on tACC.

2.

OE may be delayed up to t

CE - tOE after the falling edge of CE without impact on tCE or by tACC - tOE after an address change

without impact on t

ACC.

3.

t

DF is specified from OE or CE whichever occurs first (CL = 5 pF).

4.

This parameter is characterized and is not 100% tested.

Input Test Waveforms and

Measurement Level

t

R, tF < 5 ns

Output Test Load

Note:

1. This parameter is characterized and is not 100% tested.

AC Read Characteristics

Symbol

Parameter

AT49F040-70

AT49F040-90

AT49F040-12

Units

MinMax

t

ACC

Address to Output Delay

70

90

120

ns

t

CE

(1)

CE to Output Delay

70

90

120

ns

t

OE

(2)

OE to Output Delay

0

35

0

40

0

50

ns

t

DF

(3)(4)

CE or OE to Output Float

0

25

0

25

0

30

ns

t

OH

Output Hold from OE, CE or Address, whichever occurred first

0

ns

Pin Capacitance

(f = 1 MHz, T = 25°C)(1)

Typ

Max

Units

Conditions

C

IN

46

pF

V

IN = 0V

C

OUT

812

pF

V

OUT = 0V

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AT49F040T Datasheet(PDF) 6 Page - ATMEL Corporation

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