UPD43256B-A NEC [NEC], UPD43256B-A Datasheet - Page 5

• Manufacturer Part Number: UPD43256B-A
• Description: 256K-BIT CMOS STATIC RAM 32K-WORD BY 8-BIT
• Manufacturer: NEC [NEC]

Block Diagram
Truth Table
GND
CS
WE
OE
V
Remark
CC
A14
I/O1
I/O8
A0
|
|
: Don’t care
CS
H
L
L
L
OE
H
L
WE
H
H
L
Output disable
Not selected
Mode
Write
Read
Input data
controller
High impedance
D
I/O
D
OUT
IN
Memory cell array
Column decoder
Address buffer
Sense/Switch
262,144 bits
Supply current
I
I
CCA
SB
PD43256B
Output data
controller
5