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MITSUBISHI

〈DIGITAL ASSP〉

M66255FP

8192

× 10-BIT LINE MEMORY (FIFO)

MITSUBISHI

〈DIGITAL ASSP〉

M66255FP

8192

× 10-BIT LINE MEMORY (FIFO)

DESCRIPTION

The M66255FP is a high-speed line memory with a FIFO

(First In First Out) structure of 8192-word

× 10-bit configura-

tion which uses high-performance silicon gate CMOS pro-

cess technology.

It has separate clock, enable and reset signals for write and

read, and is most suitable as a buffer memory between de-

vices with different data processing throughput.

FEATURES

• Memory configuration of 8192 words

× 10 bits (dynamic

memory)

• High-speed cycle ............................................. 30ns (Min.)

• High-speed access ......................................... 25ns (Max.)

• Output hold ........................................................ 5ns (Min.)

• Fully independent, asynchronous write and read operations

• Variable length delay bit

• Output .................................................................... 3 states

APPLICATION

Digital photocopiers, high-speed facsimile, laser beam print-

ers.

PIN CONFIGURATION (TOP VIEW)

BLOCK DIAGRAM

23

MEMORY ARRAY OF

8192-WORD

× 10-BIT

CONFIGURATION

22

20

21

WE

WRES

WCK

WRITE

ENABLE INPUT

WRITE

RESET INPUT

WRITE

CLOCK INPUT

6

7

9

8

RE

RRES

RCK

GND

READ

ENABLE INPUT

READ

RESET INPUT

READ

CLOCK INPUT

16

15

28

INPUT BUFFER

DATA INPUT

OUTPUT BUFFER

17 18 19 24 25 26 27

1

3 4 5 10 11 12 13

DATA OUTPUT

DATA INPUT

DATA OUTPUT

DATA OUTPUT

DATA INPUT

28

17

18

19

20

21

22

23

24

25

26

READ ENABLE INPUT

WRITE ENABLE INPUT

WRITE RESET INPUT

WRITE CLOCK INPUT

READ RESET INPUT

READ CLOCK INPUT

27

1

11

12

15

16

13

14

10

9

8

7

6

5

4

3

2

RCK →

RRES →

RE →

GND

← WE

← WRES

← WCK

Outline 28P2W-C

~~

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