W27C520S-90 datasheet(1/16 Pages) WINBOND

Part #	W27C520S-90

Description	64K X 8 ELECTRICALLY ERASABLE EPROM

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Manufacturer	WINBOND [Winbond]

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Preliminary

W27C520

64K

× 8 ELECTRICALLY ERASABLE EPROM

Publication Release Date: October 2000

- 1 -

Revision A1

GENERAL DESCRIPTION

The W27C520 is a high speed, low power Electrically Erasable and Programmable Read Only Memory

organized as 65,536

× 8 bits. It includes latches for the lower 8 address lines to multiplex with the 8

data lines. To cooperate with the MCU, this device could save the external TTL component, also cost

and space. It requires only one supply in the range of 3.0V to 3.6V or 4.5V to 5.5V in normal read

mode. The W27C520 provides an electrical chip erase function. It will be a great convenient when you

need to change/update the contents in the device.

FEATURES

• High speed access time: 70/90 nS (max.)

• Read operating current: 8/20 mA (max.)

• Erase/Programming operating current

30 mA (max.)

• Standby current: 20/100

µA (max.)

• Unregulated battery power supply range,

3.0V to 3.6V and 4.5V to 5.5V

• +13V erase and programming voltage

• High Reliability CMOS Technology

− 2K V ESD Protection

− 200 mA Latchup Immunity

• Fully static operation

• All inputs and outputs directly LVTTL/CMOS

compatible

• Three-state outputs

• Available packages: 20-pin TSSOP and 20-pin

SOP

PIN CONFIGURATIONS

1

2

3

4

5

6

7

8

18

19

20

13

14

15

16

17

11

12

9

10

AD2

AD0

AD7

GND

AD6

AD4

AD1

AD3

AD5

A9

A11

A13

A15

OE/VPP

ALE

A14

A12

VDD

TSSOP

Top View

A10

A8

18

19

20

1

2

3

4

5

6

7

8

13

14

15

17

11

12

9

10

AD5

AD0

A10

A8

AD1

AD3

ALE

A14

A12

GND

AD6

AD4

AD2

A11

A13

A15

SOP

Top View

A9

OE/VPP

VDD

AD7

16

BLOCK DIAGRAM

ALE

OE / V

CONTROL

GND

VDD

PP

AD7 - AD0

OUTPUT

BUFFER

DECODER

L

A

T

C

H

E

S

A15 - A8

MEMORY

ARRAY

PIN DESCRIPTION

SYMBOL

DESCRIPTION

AD0

−AD7

Address/Data Inputs/Outputs

A8

−A15

Address Inputs

ALE

Address Latch Enable

OE /VPP

Output Enable, Program/Erase

Supply Voltage

VDD

Power Supply

GND

Ground

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