M66258FP
8192
×
8-Bit Line Memory
REJ03F0252-0200
Rev.2.00
Sep 14, 2007
Description
The M66258FP is high speed line memory that uses high performance silicon gate CMOS process technology and
adopts the FIFO (First In First Out) structure consisting of 8192 words
×
8 bits.
The M66258FP, performing reading and writing operations at different cycles independently and asynchronously, is
optimal for buffer memory to be used between equipment of different data processing speeds.
Features
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Memory configuration:
8192 words
×
8 bits configuration
High speed cycle:
20 ns (Min)
High speed access:
16 ns (Max)
Output hold:
3 ns (Min)
Reading and writing operations can be completely carried out independently and asynchronously
Variable length delay bit
Input/output:
TTL direct connection allowable
Output:
3 states
Application
Digital copying machine, laser beam printer, high speed facsimile, etc.
Block Diagram
Data inputs
D0 to D7
13
14
15
16
21
22
23
24
Data outputs
Q0 to Q7
1
2
3
4
9
10
11
12
Input buffer
Output buffer
Read address counter
Write address counter
Write
enable input
WRES
19
Write
reset input
WCK 17
Write
clock input
V
CC
18
Memory array
8192
×
8 bits
Read control circuit
Write control circuit
WE
20
5
RE
Read
enable input
6
RRES
Read
reset input
8
RCK
Read
clock input
7
GND
REJ03F0252-0200 Rev.2.00 Sep 14, 2007
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