upd43256b Renesas Electronics Corporation., upd43256b Datasheet - Page 7

• Manufacturer Part Number: upd43256b
• Description: 256k-bit Cmos Static Ram 32k-word By 8-bit
• Manufacturer: Renesas Electronics Corporation.

Block Diagram
Truth Table
Remark × : V
I/O1
I/O8
GND
/WE
/OE
/CS
V
A14
CC
A0
/CS
H
L
L
L
IH
/OE
or V
H
×
×
L
IL
Address
buffer
/WE
H
H
×
L
Output disable
Not selected
Mode
Write
Read
decoder
Row
Input data
Data Sheet M10770EJEV0DS
controller
High impedance
D
I/O
D
Memory cell array
OUT
Sense amplifier /
Switching circuit
Column decoder
IN
Address buffer
262,144 bits
Supply current
I
I
CCA
SB
Output data
controller
μ
PD43256B
7