CY7C195B データシートの表示（PDF） - Cypress Semiconductor

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CY7C195B

256 Kb (64K x 4) Static RAM

Cypress Semiconductor 

CY7C194B

CY7C195B

Pin Description

Pin

AX

CE

I/OX

NC

OE

VCC

WE

Type

Input

Control

Input or

Output

–

Control

Supply

Control

Description

Address Inputs.

Chip Enable.

Data Input/Outputs.

No Connect. Pins are not internally connected to

the die.

Output Enable (CY7C195 only).

Power (5.0V).

Write Enable.

28 DIP

2, 3, 4, 5, 6,

7, 8, 9, 10,

11, 22, 23,

24, 25, 26,

27

12

16, 17, 18,

19

1, 20, 21

13

28

15

24 DIP

1, 2, 3, 4, 5,

6, 7, 8, 9,

10, 18, 19,

20, 21, 22,

23

11

14, 15, 16,

17

–

–

24

13

24 SOJ

1, 2, 3, 4, 5,

6, 7, 8, 9,

10, 18, 19,

20, 21, 22,

23

11

14, 15, 16,

17

–

–

24

13

28 SOJ

2, 3, 4, 5, 6,

7, 8, 9, 10,

11, 22, 23,

24, 25, 26,

27

12

16, 17, 18,

19

1, 20, 21

13

28

15

CY7C195B Truth Table

CE

OE

H

X

L

L

L

X

L

H

CY7C194B Truth Table

WE I/Ox

X

High Z

H

Data Out

L

Data In

H

High Z

Mode

Deselect / Power-Down

Read

Write

Selected, outputs disabled

Power

Standby (ISB)

Active (ICC)

Active (ICC)

Active (ICC)

CE

WE Input/Output

H

X High Z

L

H Data Out

L

L Data In

Mode

Power-Down

Read

W rite

Power

Standby (ISB)

Active (ICC)

Active (ICC)

Document #: 38-05409 Rev. *A

Page 4 of 13

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