W27E020 datasheet(6/14 Pages) WINBOND

Part #	W27E020

Description	256K X 8 ELECTRICALLY ERASABLE EPROM

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Manufacturer	WINBOND [Winbond]

Direct Link	http://www.winbond.com

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6 / 14 page

Preliminary W27E020

- 6 -

READ OPERATION DC CHARACTERISTICS

(Vcc = 5.0V

±10%)

PARAMETER

SYM.

CONDITIONS

LIMITS

UNIT

MIN.

TYP.

MAX.

Input Load Current

ILI

VIN = 0V to VCC

-5

-

5

µA

Output Leakage Current

ILO

VOUT = 0V to VCC

-10

-

10

µA

Standby VCC Current

(TTL input)

ISB

CE = VIH

-

1.0

mA

Standby VCC Current

(CMOS input)

ISB1

CE = VCC

±0.2V

-

5

100

µA

VCC Operating Current

ICC

CE = VIL

IOUT = 0 mA

f = 5 MHz

-

30

mA

VPP Operating Current

IPP

VPP = VCC

-

10

µA

Input Low Voltage

VIL

-

-0.3

-

0.8

V

Input High Voltage

VIH

-

2.0

-

VCC +0.5

V

Output Low Voltage

VOL

IOL = 2.1 mA

-

0.45

V

Output High Voltage

VOH

IOH = -0.4 mA

2.4

-

V

VPP Operating Voltage

VPP

-

VCC -0.7

-

VCC

V

READ OPERATION AC CHARACTERISTICS

(VCC = 5.0V

±10%, for 70, 90 and 120 nS; TA = 0 to 70° C)

PARAMETER

SYM.

W27E020-70

W27E020-90

W27E020-12

UNIT

MIN.

MAX.

MIN.

MAX.

MIN.

MAX.

Read Cycle Time

TRC

70

-

90

-

120

-

nS

Chip Enable Access Time

TCE

-

70

-

90

-

120

nS

Address Access Time

TACC

-

70

-

90

-

120

nS

Output Enable Access

Time

TOE

-

30

-

40

-

55

nS

OE High to High-Z Output

TDF

-

25

-

25

-

30

nS

Output Hold from Address

Change

TOH

0

-

0

-

0

-

nS

Note: VCC must be applied simultaneously or before VPP and removed simultaneously or after VPP.

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