AT49F020-55PC datasheet(8/10 Pages) ATMEL

Part #	AT49F020-55PC

Description	2-Megabit 256K x 8 5-volt Only CMOS Flash Memory

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Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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AT49F020

8

Notes:

1. These parameters are characterized and not 100% tested.

2. See t

OE spec in AC Read Characteristics

Data Polling Waveforms

Notes:

1. These parameters are characterized and not 100% tested.

2. See t

OE spec in AC Read Characteristics.

Toggle Bit Waveforms(1)(2)(3)

Notes:

1.

Toggling either OE or CE or both OE and CE will operate toggle bit. The t

OEHP specification must be met by the toggling

input(s).

2.

Beginning and ending state of I/O6 will vary.

3.

Any address location may be used but the address should not vary.

Data Polling Characteristics (1)

Symbol

Parameter

Min

Typ

Max

Units

t

DH

Data Hold Time

10

ns

t

OEH

OE Hold Time

10

ns

t

OE

OE to Output Delay (2)

ns

t

WR

Write Recovery Time

0

ns

Toggle Bit Characteristics(1)

Symbol

Parameter

Min

Typ

Max

Units

t

DH

Data Hold Time

10

ns

t

OEH

OE Hold Time

10

ns

t

OE

OE to Output Delay(2)

ns

t

OEHP

OE High Pulse

150

ns

t

WR

Write Recovery Time

0

ns

CE

OE

I/O7

tOE

WE

tDH

An

tOEH

tWR

A0-A17

An

CE

OE

I/O6

tOE

WE

tDH

tOEHP

HIGH Z

tOEH

tWR

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AT49F020-55PC Datasheet(PDF) 8 Page - ATMEL Corporation

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