IS41LV16257B-35K Ver la hoja de datos (PDF) - Integrated Silicon Solution

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IS41LV16257B-35K

256K x 16 (4-MBIT) DYNAMIC RAM WITH FAST PAGE MODE

Integrated Silicon Solution 

IS41LV16257B

FUNCTIONAL BLOCK DIAGRAM

OE

WE

LCAS

UCAS

CAS

CLOCK

GENERATOR

CAS

WE

CONTROL

LOGICS

WE

OE

CONTROL

LOGIC

RAS

RAS

CLOCK

GENERATOR

REFRESH

COUNTER

DATA I/O BUS

COLUMN DECODERS

SENSE AMPLIFIERS

A0-A8

ADDRESS

BUFFERS

MEMORY ARRAY

262,144 x 16

ISSI ®

I/O0-I/O15

PIN CONFIGURATIONS

40-Pin TSOP (Type II)

VDD 1

I/O0 2

I/O1 3

I/O2 4

I/O3 5

VDD 6

I/O4 7

I/O5 8

I/O6 9

I/O7 10

40 GND

39 I/O15

38 I/O14

37 I/O13

36 I/O12

35 GND

34 I/O11

33 I/O10

32 I/O9

31 I/O8

NC 11

NC 12

WE 13

RAS 14

NC 15

A0 16

A1 17

A2 18

A3 19

VDD 20

30 NC

29 LCAS

28 UCAS

27 OE

26 A8

25 A7

24 A6

23 A5

22 A4

21 GND

40-Pin SOJ

VDD 1

I/O0 2

I/O1 3

I/O2 4

I/O3 5

VDD 6

I/O4 7

I/O5 8

I/O6 9

I/O7 10

NC 11

NC 12

WE 13

RAS 14

NC 15

A0 16

A1 17

A2 18

A3 19

VDD 20

40 GND

39 I/O15

38 I/O14

37 I/O13

36 I/O12

35 GND

34 I/O11

33 I/O10

32 I/O9

31 I/O8

30 NC

29 LCAS

28 UCAS

27 OE

26 A8

25 A7

24 A6

23 A5

22 A4

21 GND

PIN DESCRIPTIONS

A0-A8

I/O0-I/O15

WE

OE

RAS

UCAS

LCAS

VDD

GND

NC

Address Inputs

Data Inputs/Outputs

Write Enable

Output Enable

Row Address Strobe

Upper Column Address

Strobe

Lower Column Address

Strobe

Power

Ground

No Connection

2

Integrated Silicon Solution, Inc. — 1-800-379-4774

Rev. B

04/22/05

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