WS57C256F datasheet(1/2 Pages) STMICROELECTRONICS

部件名	WS57C256F

功能描述	MILITARY HIGH SPEED 32K x 8 CMOS EPROM

PDF	2 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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1 / 2 page

PRODUCT SELECTION GUIDE

PARAMETER

WS57C256F-55

WS57C256F-70

Address Access Time (Max)

55 ns

70 ns

Output Enable Time (Max)

25 ns

30 ns

WS57C256F

VCC

A14

A13

A8

A9

A11

OE

A10

CE/PGM

O7

O6

O5

O4

O3

VPP

A12

A7

A6

A5

A4

A3

A2

A1

A0

O0

O1

O2

GND

1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

A8

A9

A11

NC

OE

A10

CE/PGM

O7

O6

A6

A5

A4

A3

A2

A1

A0

NC

O0

O1 O2

NC O3 O4 O5

1

43

2

32 31 30

29

28

27

26

25

24

23

22

21

5

6

7

8

9

10

11

12

13

14 15 16 17 18 19 20

TOP VIEW

Chip Carrier

CERDIP

PIN CONFIGURATION

4-17

MILITARY HIGH SPEED 32K x 8 CMOS EPROM

KEY FEATURES

• Fast Access Time

• EPI Processing

— 55 ns

— Latch-up Immunity Up to 200 mA

• Low Power Consumption

• Standard EPROM Pinout

• DESC SMD No. 5962-86063

GENERAL DESCRIPTION

The WS57C256F is a High Performance 256K UV Erasable Electrically Programmable Read Only Memory. It is

manufactured using an advanced CMOS process technology enabling it to operate at speeds as fast as 55 ns

Access Time.

Two major features of the WS57C256F are its Low Power and High Speed. While operating in a TTL environment it

consumes less than 120 mA while cycling at full speed. Additionally, the WS57C256F can be placed in a standby

mode which drops operating current below 5 mA in a TTL environment and 500 µA in a CMOS environment.

The WS57C256F also has exceptional output drive capability. It can source 4 mA and sink 16 mA per output.

The WS57C256F is configured in the standard EPROM pinout which provides an easy upgrade path for systems

which are currently using standard EPROMs.

PINS

CE/

OE

A9

A0 VPP VCC OUTPUTS

MODE

PGM

Read

VIL

XX

VCC VCC

DOUT

Output

Disable

XVIH

XX

VCC VCC

High Z

Standby

VIH

XX

X

VCC VCC

High Z

Program

VIL

VIH

XX

VPP

2 VCC

DIN

Program

Verify

XVIL

XX

VPP2 VCC

DOUT

Program

Inhibit

VIH VIH

XX

VPP

2 VCC High Z

Signature3

VIL

VIL VH

2

VIL VCC VCC

23 H

4

VIL

VIL VH

2

VIH VCC VCC

EO H

5

MODE SELECTION

NOTES:

1. X can be VIL or VIH.

4. Manufacturer Signature.

2. VIH = VPP = 12.75 ± 0.25 V.

5. Device Signature.

3. A1 – A8, A10 – A14 = VIL.

Return to Main Menu

类似零件编号 - WS57C256F

制造商	部件名	数据表	功能描述
STMicroelectronics	WS57C256F	49Kb / 5P	HIGH SPEED 32K x 8 CMOS EPROM
	WS57C256F-35	49Kb / 5P	HIGH SPEED 32K x 8 CMOS EPROM
	WS57C256F-35C	49Kb / 5P	HIGH SPEED 32K x 8 CMOS EPROM
	WS57C256F-35D	49Kb / 5P	HIGH SPEED 32K x 8 CMOS EPROM
	WS57C256F-35J	49Kb / 5P	HIGH SPEED 32K x 8 CMOS EPROM

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