Instruction Manual

Preliminary W24256
- 2 -
TRUTH TABLE
CS
OE
WE
MODE
I/O1
− I/O8
V
DD CURRENT
H X X Not Selected High Z I
SB
, I
SB
1
L H H Output Disable High Z I
DD
L L H Read Data Out I
DD
L X L Write Data In I
DD
DC CHARACTERISTICS
Absolute Maximum Ratings
PARAMETER RATING UNIT
Supply Voltage to V
SS
Potential -0.5 to +7.0 V
Input/Output to V
SS
Potential -0.5 to V
DD
+0.5 V
Allowable Power Dissipation 1.0 W
Storage Temperature -65 to +150
°
C
Operating Temperature 0 to 70
°C
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability
of the device.
Operating Characteristics
(V
DD = 5V
±
10%; VSS = 0V; TA = 0
°
C to 70
°
C)
PARAMETER SYM. TEST CONDITIONS MIN. TYP.* MAX. UNIT
Input Low Voltage V
IL
- -0.5 - +0.8 V
Input High Voltage V
IH
- +2.2 - V
DD
+1 V
Input Leakage Current I
LI
V
IN
= V
SS
to V
DD
-5 - +5
µ
A
Output Leakage Current I
LO
VI/O = V
SS
to V
DD
,
CS
= V
IH
(min.) or
OE
= V
IH
(min.) or
WE
= V
IL
(max.)
-5 - +5
µ
A
Output Low Voltage V
OL
I
OL
= +2.1 mA - - 0.4 V
Output High Voltage V
OH
I
OH
= -1.0 mA 2.4 - - V
Operating Power
Supply Current
I
DD
CS
= V
IL
(max.), I/O = 0 mA ,
Cycle = min , Duty = 100 %
- - 60 mA
Standby Power Supply
Current
I
SB
CS
= V
IH
(min.), Cycle = min.
Duty = 100%
- - 3 mA
I
SB1
CS ≥
V
DD
-0.2V
L - - 100
µ
A
LL - - 50
µ
A
Note: Typical parameter is measured under ambient temperature TA = 25
°
C and VDD = 5V.