W27E020 datasheet(7/14 Pages) WINBOND

Part #	W27E020

Description	256K X 8 ELECTRICALLY ERASABLE EPROM

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Manufacturer	WINBOND [Winbond]

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Preliminary W27E020

Publication Release Date: December 1997

- 7 -

Revision A1

DC PROGRAMMING CHARACTERISTICS

(VCC = 5.0V

±10%, TA = 25° C ±5° C)

PARAMETER

SYM.

CONDITIONS

LIMITS

UNIT

MIN.

TYP.

MAX.

Input Load Current

ILI

VIN = VIL or VIH

-

±10

µA

VCC Program Current

ICP

CE = VIL, OE = VIH,

PGM = VIL

-

30

mA

VPP Program Current

IPP

CE = VIL, OE = VIH,

PGM = VIL

-

30

mA

Input Low Voltage

VIL

-

-0.3

-

0.8

V

Input High Voltage

VIH

-

2.4

-

5.5

V

Output Low Voltage (Verify)

VOL

IOL = 2.1 mA

-

0.45

V

Output High Voltage (Verify)

VOH

IOH = -0.4 mA

2.4

-

V

A9 Silicon I. D. Voltage

VID

-

11.5

12.0

12.5

V

VPP Program Voltage

VPP

-

11.75

12.0

12.25

V

VCC Supply Voltage (Program)

VCP

-

4.5

5.0

5.5

V

AC PROGRAMMING/ERASE CHARACTERISTICS

(VCC = 5.0V

±10%, TA = 25° C ±5° C)

PARAMETER

SYM.

LIMITS

UNIT

MIN.

TYP.

MAX.

VPP Setup Time

TVPS

2.0

-

µS

Address Setup Time

TAS

2.0

-

µS

Data Setup Time

TDS

2.0

-

µS

PGM Program Pulse Width

TPWP

95

100

105

µS

PGM Erase Pulse Width

TPWE

95

100

105

mS

Data Hold Time

TDH

2.0

-

µS

OE Setup Time

TOES

2.0

-

µS

Data Valid from OE

TOEV

-

150

nS

OE High to Output High Z

TDFP

0

-

130

nS

Address Hold Time after PGM High

TAH

0

-

µS

Address Hold Time (Erase)

TAHE

2.0

-

µS

CE Setup Time

TCES

2.0

-

µS

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

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